Patent Number: 043814620
Section: description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The preferred example of the exergy transformer system is based on utilization of solar energy; the solar exergy is released by nuclear reactions on the sun, and stored in the form of free enthalpy of two metastable liquid compounds (NH.sub.2).sub.2 and (OH).sub.2, bearing in mind that (OH).sub.2 is generated only as a by-product of the generation of H.sub.2 which is needed for the (NH.sub.2).sub.2 synthesis. Both, the process of exergy transformation as well as the design of the transformer system are determined by the physical quantities at the entrance or input and the exit or output of the transformer. Quantities at the entrance are the specific exergy of solar radiation spectrally distributed as well as the flux density of radition; quantities at exit are the specific free enthalpies of the two compounds synthesized in the transformer and the ratio of both mass flows, respectively of exergy stored. The transformer yields additionally electrical energy over and above the energy needed to maintain operation of the transformer system. The specific process envisioned here particularly as far as the hydrazine synthesis is concerned, is to be seen in that hydrazine is formed by an electrolytic process specifically by forming (NH.sub.2).sub.2 out of LiNH.sub.2. The energy needed to sustain that process is taken ultimately from the sun. The solar energy is used to obtain the production of that electrical energy needed to sustain the electrolysis using lithium as or as part of a circulating fluid system. The electrolysis will be produced within an MHD conversion process in which kinetic energy of a fluid is converted into electrical energy, including the energy to obtain the electrolysis. The kinetic energy is the result of a two-phase process in which solar exergy absorbed by a liquid phase is transferred to an isothermally expanding gas as it accelerates the liquid phase, and the electrolysis is carried out in that liquid phase, while the movement of the liquid phase is used to generate the magnetic field causing the electric field in the liquid phase to sustain electrolysis therein. Liquid and gaseous phases complete separate but temporarily linked circulations, whereby the liquid phase absorbs the solar energy, heats the expanding gaseous phase while being accelerated by it, serves as carrier for the electrolysis and returns. The gaseous phase of the two-phase flow is alternated between low temperature compression and high temperature expansion with recuperative heat exchange inbetween. Turning now to details of certain aspects of this basic process, the specific exergy of radiation depends on its wave length; it is continuously distributed over the spectrum between the limits of about .lambda.=0.8.multidot.10.sup.-6 m in the infrared and of about .lambda.=0.3.multidot.10.sup.-6 m in the ultraviolet. The specific exergy e.sub.s of radiation, therefore, covers the range of EQU 150&lt;e.sub.s &lt;400 kWs/mol if related to the unit mol of particle quantities. This quantity is calculated from the equation EQU e.sub.s =N.sub.A .multidot.hc/.lambda. with N.sub.A =6.02.multidot.10.sup.23 1/mol (Avogadro's constant), h=6.63.multidot.10.sup.-34 Ws.sup.2 (Planck's constant), c=3.multidot.10.sup.8 m/s (speed of light). The fluxdensity q.sub.s of radiation is defined to be the exergy, which passes through a surface unit, in normal direction within unit time, and is approximately, without taking into consideration any additional absorption in the atmosphere; EQU q.sub.s =1,4 kW/m.sup.2 The process of synthesizing (NH.sub.2).sub.2 and (OH).sub.2 can be explained, in principle, as being subdivided into the following step: ##STR1## The steps 1.1 and 2.1 are similar and O.sub.2 appears to be a rest product of synthesis 1 (though not to be produced directly), while H.sub.2 is a rest product of synthesis 2, which both can be combined according to step 2.2 to hydrogen-peroxide. The two synthesis can be coupled in an overall exergy transformer system performing the following steps: ##STR2## Herein, steps (1) and (2) are only listed separately, in reality free oxygen is not produced. The FIGS. 2 and 3 present the change of free enthalpy g of formation of (NH.sub.2).sub.2 and H.sub.2 +(OH).sub.2. Generally speaking, if the difference in enthalpie after and before the reaction is positive, the step is endergonic, because the reaction can take place only by supply of exergy; exergy can be stored by this reaction, if the reaction can be reversed. If the enthalpie difference is negative, however, the step is exergonic, due to the release of exergy, and reaction takes place spontaneously. A brief estimate will clarify the principles of operation of the exergy transformation: the formation of H.sub.2 according to step 1 of the coupled processes 1+2 needs the supply of specific exergy of at least 56.5 kcal/mol=235 kWs/mol; the formation of hydrazine requires at least a specific exergy of 630 kWs/mol. If the exergy of solar radiation were used directly for a photosynthesis of these compounds, only the ultraviolet radiation could be employed, while the remainder of solar spectrum could not be used; in addition, the different reactions needed in that case will be multiquanta processes. The exergy conversion and transformation system as per this invention absorbs actually the total exergy of solar radiation it receives and transfers it as heat to an inert gas (N.sub.2). This gas is the thermo-fluid-dynamic working fluid, or tfd for short, of the MHD process and synthesis and is used thermodynamically to drive a liquid phase whose resulting kinetic energy can be used in an MHD conversion process and which can sustain an electrolytic process due to interaction with the magnetic field it generates. In order to capture sufficient exergy by absorption, it is deemed necessary to increase the flux-density of solar radiation by a factor of about 1000, cooperating directly with an exergy absorbing surface at the entrance of the exergy transformer for the transfer of heat into the transformer. Therefore, the input portion of the exergy transformer will include a focussing reflector, described by way of example with reference to FIGS. 40 and 41, see also FIG. 8. I now proceed to describe certains aspects of the thermodynamics involved here. The tfd-working fluid of the exergy transformer expands isothermally to accelerate the liquid phase and imparts upon it the expansion work as kinetic energy; by this the tfd working fluid performs work to overcome internal forces, and ultimately that work is used in the electrolytic process, conceivably even for both electrolytic processes. Conversely the radiation as absorbed by the liquid phase itself, prior to that acceleration will replenish continuously the enthalpy of the gas that was converted into work in the transformer. As a result, the enthalpy available (i.e. exergy of enthalpy) will not change during the expansion and will be constant even at the end of expansion. This enthalpic exergy must be withdrawn from the gas (tfd fluid), which has expanded, before the gas will be recompressed for circulation within the transformer system, and transferred to the gas which is recompressed already. Therefore, this exergy transfer will be performed by a recuperative heat exchange between the decompressed gas and entering the heat exchanger at the lower pressure p=p.sub.low, but at the upper temperature T=T.sub.upper of process, and the gas that has already been compressed again, and entering the heat exchanger (again) now at the higher upper pressure p=p.sub.upper, but at the lower temperature T=T.sub.low. The process of the thermo-fluid-dynamic working fluid is determined by these two conditions for isenthalpic expansion as well as for the introduction of recuperative heat exchange. FIG. 4 shows the exergy flux diagram of this process. The specific work of expansion-a.sub.exp, performed by the tfd gas with a mass flow rate m.sub.tfd, must be balance by the heat flux supplied ##EQU1## The specific work is given by: ##EQU2## .pi.=p.sub.upper /p.sub.low (pressure ratio of process), R=8.3 Ws/mol K (gas constant of N.sub.2). The specific work of compression is given by: ##EQU3## Compression should, therefore, take place at as low temperature T.sub.low &lt;T.sub.upper as possible, in order to limit the work to be supplied, for the difference of expansion- and compression work is the net useful work provided by the process: ##EQU4## The requirement of recuperative heat exchange results in a limiting condition for the maximum of pressure ratio, because the available energy of gas which has to be transferred within the heat exchanger, cannot exceed the net work of process: ##EQU5## c.sub.p "=39.1 Ws/mol K (specific heat at constant pressure of N.sub.2), .kappa.=1.4 (adiabatic exponent of N.sub.2) As a result, the maximum pressure ratio .pi..sub.max is: ##EQU6## The efficiency .eta..sub.th of this process is given by the Carnot-factor .eta..sub.C (if internal and external exergy losses are not considered), the latter depending on the temperature ratio T.sub.low /T.sub.upper exclusively: ##EQU7## To give an example: for T.sub.upper =750 K and for T.sub.low =250 K is according to equation (8) .eta..sub.th =.eta..sub.c =0.666. The maximum specific net work is in this case according to (4) about 14 kWs/mol and is, therefore, lower by a factor of about 50 than that required for the different steps of synthesis. The net work of the thermo-fluid-dynamic working fluid will be converted ultimately into electrical energy, which is obtained by the introduction of a second working fluid, namely the liquid phase being accelerated by the expansion of the tfd gas and serving also as a fluid dynamic medium (mfd #1) that performs mechanical work in that an MHD conversion process converts the kinetic energy of that mfd #1 fluid into the electrical energy needed for the electrosynthesis. Moreover, the substance to be electrolytically decomposed must become a part of the liquidous phase of the MHD working fluid, as will be discussed shortly. The hydrazine (and peroxide) electrolysis requires a voltage of a few volts. Details of this MHD conversion process and the generation of the necessary electrical energy will also be described below. Presently it should be discussed what energy is actually needed for the electrolytic synthesis of hydrazine and peroxide and what electrochemical reactions are involved. The specific work expended on an electric charge, after having traversed a voltage difference of n-volts is: ##EQU8## or, if one uses mols to define particle quantities, that value a.sub.el. is given by n.multidot.N.sub.A .multidot.e.multidot.v=100 kWs/mol. The work a is the one needed to obtain the electrolytic process; n is the voltage that will in fact produce that work. The MHD process is designed to furnish that value n; it is but a few volts. The electrosynthesis of (NH).sub.2 and (OH).sub.2 by means of the above mentioned four steps depends on the fact that there is a similarity in structure in these two components, namely two groups or radicals are interconnected, OH and NH.sub.2 respectively. Moreover, the groups are chemically rather similar. In order to develop the desired reactions and the means of obtaining them, the follow step by step analysis is helpful. The OH groups and the NH.sub.2 groups both can be generated as negatively charged ions in that specifically H.sub.2 O as well as NH.sub.3 molecules can appear as hydrogen donors as well as hydrogen acceptors in accordance with the following two reactions, occurring of course in different carriers for solutions. ##EQU9## Since the hydrogen transfer in both reactions is strongly endergonic, they are quite improbable. On the other hand, if a one-valued metal is present, e.g. K or Li these reactions become exergonic and appear spontaneous (with a probability of almost unity). ##EQU10## In both cases, an electron transfers from the negative ion to the positive ions i.e. from OH.sup.- to K.sup.+ and from NH.sub.2.sup.- to Li.sup.+ ; respective two groups will in fact combine into hydrogen peroxide (di-hydroxide) and hydrazine (di-amid) resp. This is possible because the OH.sup.- groups as well as the NH.sub.2.sup.- groups have a completed electron shell of eight electrons. It is, therefore, merely necessary to provide for an electric field by means of which this electron transfer can in fact be enforced. It can thus be seen that only the combination of two neutral OH and NH.sub.2 groups leads again to a complete electron shell in either case due to a co-valent combination by means of an electron pair that is common to both groups in a molecule. ##EQU11## Both compounds are metastabil, thus exhibiting the tendency of giving off H-atoms to revert to double compounds ##EQU12## Since H.sub.2 O is a raw material for the storage of exergy in the exergy transformer, the first two steps of the synthesis require the electrolysis of H.sub.2 O but without the usual decay of (OH).sub.2 by means of catalytic effect of impurities ##EQU13## Both steps furnish the H.sub.2 for the hydrazine synthesis (step 3+4 in the above mentioned combined method). Very significantly, the exergy transformer as per this invention avoids the step of using NH.sub.3 as per relation 12b because LiNH.sub.2 is used as an intermediate product which on the one hand can be decomposed electrolytically and, on the other hand it can be synthesized directly from the elements Li, N.sub.2 and H.sub.2 as the reaction is exergonic. This is significant, as Li is used as mfd #1 fluid, and LiNH.sub.2 can readily become a part thereof. FIG. 5 shows the step 1 to generate catalytically Li-amid as an intermediate product. The exergy which is generated by the reaction if carried out at 300 K is quite high and that reaction cannot really be used successfully for and as the last step in an electrosynthesis running at such a low temperature. However, as shown in FIG. 6, the free enthalpie approaches zero for high temperatures at about 900.degree. Kelvin. Thus, the electrosynthesis of Li-amid should be carried out at these temperatures. The solar energy capturing process, therefore, should heat the components for that process to that temperature which in turn becomes the upper temperature for the isenthalpic production of the necessary kinetic energy for the MHD process. FIG. 7 shows a diagram for the entire process as far as the energy consumption is concerned. The solar conversion and MHD conversion process run on solar energy produces a certain amount of electrical energy. About 75% of that electrical exergy is stored by means of the electrosynthesis of (OH).sub.2 and H.sub.2, the remainder of the electrical exergy (25%) are used for the electrolysis in which (NH.sub.2).sub.2 is made out of Li-amid. The solar exergy transformer system depicted in FIG. 8 has the following primary objectives: 1. Solar exergy is to be absorbed covering a continuous spectrum as wide as possible and amplifying the radiation flux density by a factor of, say, 1000. 2. Electrical energy is to be produced at two descrete voltages, each in the order of a few volts, which actually increases the specific exergy of the radiation received. 3. H.sub.2 O and N.sub.2 is to be separated from air, essentially the cooling air, for use as primary raw material for the exergy storage on a material exergy carrier. 4. (OH).sub.2 is to be synthesized electrically for both, storage of exergy and producing H.sub.2 as a raw material for the hydrazine synthesis. 5. Electrosynthesis of (NH.sub.2).sub.2 as solar exergy storing fuel, preceded by the formation of Li-amid, using N.sub.2 and H.sub.2 as per process steps 3 and 4 and using Li as an intermediary circulating carrier. The flow diagram of FIG. 8 depicts and explains these functions of the exergy transformer and as a complete system. However, the main portion is contained in block 208 and provides for the synthesis of hydrazine as principle output with solar energy serving as input. Block 209 depicts the formation of hydrogen peroxide as the preferred but not exclusively usable oxidizer for hydrazine. Moreover, auxiliary fluids are needed for and consumed in the process of forming hydrazine, namely nitrogen and hydrogen which can be produced as by-products in the formation of hydrogen peroxide. Accordingly, block 209 depicts the auxiliary process for providing for these additional materials, and the entire process needs only air as material input (without the oxygen). The block 208 contains basically three circulations, a first circulation for a thermo fluid-dynamic work fluid or tfd fluid established basically by nitrogen. The second circulation is provided by the magneto fluid-dynamic work fluid or mfd fluid #1 which is established by lithium, mixed with LiNH.sub.2 and always mixed with finely dispersed electrically conductive substances such as iron. The third circulation can be provided by a second mfd fluid, i.e., mfd fluid #2 which is a solution of Li and NH.sub.3. Mfd fluid #2 provides primarily for cooling and can be replaced. Details of block 208 will be described shortly. Reference numeral 210 may denote intermediate storage of products wherein 202 refers specifically to storage for hydrazine made as per process block 208. 188 denotes the storage for hydrogen peroxide made in block 209. Block 179 denotes water storage. I now turn to the production of the raw products needed in the hydrazine synthesis, namely H.sub.2 and N.sub.2. Block 209 denotes this process. It is assumed that the only "true" raw material to be used is air 175. The air is sucked into the process at 176, whereby excess electrical energy generated at 199 pursuant to the hydrazine synthesis can be used to run the blower. Nitrogen is separated from air at 177 by known process (such as the Ericson process) and passes to a nitrogen injection at 192 for the Li-amid generation. Moisture is separated from the air at 178 by precipitation and injected at 181 in a flow of a mfd fluid #3 circulating along a path 180 for an H.sub.2 producing electrolytic process. Excess water as separated may be stored and/or discharged at 179. Hydrogen is separated from circulation 180 at 182 i.e. it sucked out of the system for injection at a point 192 into the flow of mfd fluid #1 of the hydrazine synthesis process 208. An MHD conversion process with hydrogen peroxide synthesis takes place at 184 whereby electrical energy for the electrolytic process is furnished by the solar MHD conversion system 208 via line 206. The process 184 therefore, runs as MHD motor under electrolytic generation of H.sub.2 and (OH).sub.2. The peroxide is extracted from the circulation at 185 by evaporation (using e.g. excess heat from unit 208) and after condensation of the (OH).sub.2 will pass for storage to 186. FIG. 8 is actually drawn for illustrating functional separation; the physical H.sub.2 separation i.e. the outflow of hydrogen as a gas from the mfd #3 fluid occurs right in and from the converter 184, so that 182 should actually be superimposed upon 184. The situation is different, however, as to (OH).sub.2. This peroxide is flushed out of the converter 184 and rapid physical separation from the H.sub.2 is essential, because otherwise (OH).sub.2 will separate again into H.sub.2 O and O.sub.2. The (OH).sub.2 separation from the mfd #3 liquid at point 185 is carried out by evaporation. The mfd fluid #3 with hydrogen passes through a prime mover 187 for sustaining the circulation (that may be a MHD pump) to complete the circulation. The fluid circulating through path 180 is a watery solution of potassium hydroxide. The MHD motor 184 sets up a circular electric field in that solution. Specifically, the coil system in the converter 184 is excited by electrical energy extracted from the hydrazine generator and solar energy converter 208. The watery solution of KOH with finely dispersed iron interacts with the field generated with a slip S&gt;O as between phase and liquid velocity to originate toroidal current which are ultimately instrumental in the generation of the electrolysis. The Reynolds number (see definition below) is low due to the low electrical conductivity of H.sub.2 O and the interaction is rather weak. The negative OH ions and positive potassium ions sustain the current flow through the mfd liquid as a result of the electric field set up in KOH+H.sub.2 O liquid as pumped through unit 184. Electron transfer results in the generation of electrically neutral potassium as well as in the formation of (OH).sub.2. The metallic potassium combines with the water to form (i.e. to restore) KOH with the result of formation of H.sub.2. It should be noted, that the finely divided iron particles serve as principle electron conductors within the circular electric field set up in the liquidous mfd #3, so that throughout current conduction is carried out predominantly by electron flow within the iron particles and through ion flow inbetween the particles bearing in mind that the external energization is an alternating field and the passing solution of KOH, water and (OH).sub.2 will not undergo electron exchange with the electrodes so that (OH).sub.2 will not separate again into H.sub.2 and O.sub.2. The primary function of the exergy transformer 208 is to convert specific exergy of the thermo fluid dynamic working medium (tfd) into electrical energy under utilization of the liquidous magneto-fluid-dynamic work medium (mfd #1) which is basically a liquidous metal and which includes finely divided iron so as to assume a certain electric conductivity and ferromagnetic characteristics. This second medium when moved in an external magnetic field interacts therewith electromagnetically by means of the so called Lorentz-force. These two media can additionally interact fluid mechanically by operation of their viscosity, for one fluid drags the other. Together they constitute the two phase MHD-work fluid wherein the tfd fluid is the gaseous phase and the mfd #1 fluid is the non-gaseous (predominantly liquidous) phase. An MHD process operates as follows: the tfd work fluid (gas) performs work when expanding, that work is not expended against external forces but on the mfd #1 work medium. Rather than moving turbine blades, pistons or the like, work is expended on the basis of local imbalances, and specifically for the case of viscous interaction work is performed by one medium on the other by operation of speed differentials and by the tendency to equalize such speed differentials as between the two media. The mfd work fluid works against external forces, but not mechanical ones with varying system boundaries; rather the accelerated mfd #1 liquid works against a retarding, outer magnetic field (across rigid mechanical boundaries) which field in turn results from the movement of the electrically conductive liquid adjacent energizing coils. There is a certain lack in consistency in the known MHD processes, namely that the compressing work performed on the tfd gas is carried out by means of compressors having mechanically movable parts and system boundaries. The novel process avoids this approach. Proceeding now to details of the hydrazine synthesis as outlined in FIG. 8, solar radiation 188 is collected by a reflector 189 and focussed for absorption and heating at 191 of the mfd fluid #1 which is lithium mixed with finely divided Fe and moves in a circulation flow path 190. The heating process 191 may be carried out via a separate circulation of sodium, the latter absorbing thermal energy more readily and heating the lithium to a temperature in excess of about 750.degree. Kelvin. Nitrogen and hydrogen are injected into the mfd #1 fluid at 192 to obtain LiNH.sub.2 in 193 by catalytic reaction, the Fe particles serving as catalyst and at a sufficiently high temperature. The functions 191, 192, and 193 are carried out in compartments A to D of FIG. 24. The tfd working fluid (gas--N.sub.2) is mixed with the mfd #1 fluid at 195. The tfd gas circulates along a separate path 194, but the mfd fluid #1 circulation as well as the tfd fluid circulation are temporarily combined at that point 195. The tfd fluid is pressurized at that point and upon mixing with the mfd fluid assumes its temperature, (compartment G in FIG. 27). The combined fluids constitute a two phase flow, whereby the mfd fluid #1 is predominantly the liquid phase and the tfd fluid is the gaseous phase. The gaseous phase is decompressed isothermally at 196 so that a portion of its enthalpie is converted into kinetic energy which in turn is imparted upon the droplets of the liquid mfd phase. The decompressed tfd fluid is separated from the mfd #1 fluid at 197, and the mfd #1 fluid is focussed at 198. In reality, the focussing of the liquid phase is part of the separation from the gaseous phase--tfd fluid, N.sub.2 (compartment J of FIG. 27). The focussed liquid continues as a free flowing liquid jet riding on a gaseous cushion and being subjected to an MHD conversion process 199. In particular, the jet passes through a self-exciting coil-capacitor system, connected electrically analogous to an asynchronous motor with capacitor load for self-excitation. The interaction of the fast moving conductive-ferromagnetic jet with coils produces a travelling magnetic field and interaction of the latter with the jet on the basis of the Maxwell equation curl E+B=0 produces an electric field so that the LiNH.sub.2 in the jet is subjected to electrolysis. The iron particles serve as bipolar electrodes in the electrolytic process which sustain a current flow in the liquidous jet as a whole. Any electrical energy not consumed in the electrolysis is externally available at 206, 207, driving, for example, the MHD converter 184 in which the water electrolysis takes place as outlined above. Following the electrolysis the mfd #1 fluid is passed through an emergency jet spoiler 200 (jet shut off) and block 201 represents the hydrazine separation from the lithium, the residual LiNH.sub.2 and the iron particles. The liquid jet is captured and recompressed at 203 (diffusor action), so that it can be returned via circulation 190 to the zone of heating (191) completing the path for Li and Fe, including residual LiNH.sub.2. Please note also here, that the functionally separated steps 200, 201, 203 are realized in a combined structure (compartment M--FIG. 32). The decompressed gaseous tfd fluid was separated from the two phase flow at 197 and passes through a recuperative heat exchanger 204 in which it gives off thermal exergy to the tfd gas as leaving an isothermal compression stage 205. A recuperative heat exchanger is shown in FIG. 32, Compartment O. The cooled tfd fluid enters 205 and is mixed with a second mfd (or mfd #2) fluid at 211, to undergo heat exchange so that the subsequent compression of the tfd fluid, box 212, is carried out under isenthalpic conditions (compartment Q in FIG. 32). The mfd #2 fluid is condensed at 213 and separated from the tfd fluid (N.sub.2) at 214 from which it is returned to the recuperative heat exchanger to receive thermal energy from the tfd fluid before the latter is recompressed. The pressurized and reheated tfd fluid is now returned to point 195 for mixing with the mfd fluid. About 10% of the pressure is needed to sustain the return flow of the tfd gas to the mixing point 195. The mfd #2 fluid following separation from the tfd fluid is returned to mixing point 211. The condensation of the mfd #2 fluid as per function box 213 is actually part of the separation of function box 214 as far as implementation is concerned (compartment R in FIG. 36). The condensation is the result of heat exchange with a fluid in function box 213 circulating along path 217. That heat exchange fluid is cooled by ambient air (box 215), whose flow is indicated by 216. FIG. 8 demonstrates the central position of the tfd work fluid and the interaction of it with the two fluids mfd #1 and mfd #2. These interactions are limited in time and space and concern exclusively isothermic and isenthalpic processes. One is the isothermic decompression of the tfd fluid in 196 under acceleration of the mfd #1 liquid and carried out at the upper working temperature T=T.sub.u, the other process is the isothermic compression in 212 at the lower working temperature, T=T.sub.low, with mfd #2 serving as coolant, while being at least in parts caused to circulate by the decelerating tfd gas as it is being compressed. The gaseous tfd work medium circulates through the system without receiving or expending any work via movable system boundaries. Both liquidous media, mfd #1 and mfd #2 are driven by means of dragging forces exerted by the tfd gas upon the two liquids whenever being mixed or combined therewith. The tfd gas does not have any access to any heat exchange with the environment, except through the mfd #1 and #2 fluids. The interaction between the tfd gas and the two mfd fluids (liquids) is predominantly but not exclusively based on viscosity. Rather, a generalized thermodynamic force is effective being in the nature of a temperature difference between the tfd gas and either of the mfd liquids. This temperature differential enforces the heat flow needed respectively for isenthalpic decompression and compression. In particular, the mfd fluids both serve additionally as heat transfer and storage media. The mfd #1 liquid stores solar energy and heats the tfd gas upon mixing and during decompression thereof. The mfd #2 fluid ensures low temperature isothermic recompression of the tfd gas. This function dominates as to mfd #2, a MHD pump keeps only the circulation going for that liquid. The mass flow is lower by about a factor of 50 as compared with mfd #1 due to evaporative cooling of that mfd #2 fluid. As a consequence, the technical system does not only have rigid system boundary but the size of the system boundaries have no influence on the process and work performed by the tfd work medium. In either case, tfd and mfd fluids mix almost homogenially so that very large surface areas are available for the heat transfer, and the average depth of heat penetration is very very small, so that this transfer occurs almost instantaneously on contact and mixing of the fluids. As stated above, mfd #1 is a solution of Li and LiNH.sub.2, the latter being in effect an intermediate product for the synthesis of (NH.sub.2).sub.2 from N.sub.2 and H.sub.2. The heat capacity and thermal conductivity of this solution (which includes some iron particles), permits full utilization of the concentration of solar flux density by means of reflector 189 up to 125 W/cm.sup.2. The mfd #2 fluid is fully analogous thereto and tuned to a lower operating temperature of, in cases, T.sub.v =250 K. It is a solution of Li and HNH.sub.2 having a high electric conductivity even at such low temperatures. Moreover, an LiNH.sub.2 residue (from mfd 190 1) that may have been carried over by the tfd gas to the mfd 190 2 liquid, can go into solution to permit chemical regeneration, recovery and return to the mfd #1 fluid. Mg and Ca are suitable reactants to separate the LiNH.sub.2 from the mfd #2 fluid. Before describing construction and layout of the MHD system 208 in greater detail, I refer to an important feature of this system, namely the reflector which is used for focussing the solar radiation. The radiation density must be increased by about a factor of 1000. A rigid reflector may prove to be impractical and expensive. Moreover, it is advisable to provide a reflector which is in fact buyontly supported. Such a feature facilitates the orientation of the mirror including following the sun and a buyont construction may even permit the mirror with centrally disposed MHD transformation unit to be positioned at some distance from ground. FIG. 40 shows a modular MHD system (=208), shown as an elongated tube 27. One of the units shown in detail in FIGS. 24 through 39 may be contained in or constitute module 27, or a cluster thereof will be arranged as shown in FIG. 21 and may be contained in unit 27. The front portion of each such module (compartments A to D of FIG. 24, or portion 191 of FIG. 1) is contained in the focus 127 established either by the exposed outer skins 15 of the modules or by a "black" absorber covering that skin. The modules or tube 27 is held via tube 126 for support and protection. Reference numeral 128 refers to the air gaps through which air can enter into heat exchange at the low temperature side of the modules (see compartments S through Y, FIG. 38). The reflector is established by a reflecting foil 115 which constitutes the inner surface of the concave mirror as well as the top foil of a buoyoncy support structure. The periphery of the reflector is established by a hollow toroidal bead, hose or tube 108 with a diameter of 200 meter of the annulus and 30 m diameter of the circular cross-section of the toroid. Tube 108 is filled with hydrogen 109 for establishing the main buoyoncy. Tube 108 is strengthened on the inside by a chamber 110 filled with H.sub.2 under higher pressure. Welding seam 113, between the wall of chamber 110 and tube 108 serves as anchoring points or line for the outer ends of support arms 114. A seam 112 is the boundary and connect point between mirror foil 115 and hose or bead 108. Support arms 114 are pivotally mounted on a central support tube 117 by means of pivot joints 116. A second joint 118 of each arm is provided in about the middle thereof and is connected to a bottom foil 124 which connects also to joint 113. Arms 114 center the bead and are tensioned by cable 119. A welding seam or connecting line 120 fastens the coil 115 to an annulus, ring or sleeve 122, a foil 121 is also fastened thereat. Annulus 122 is slidable positioned on tube 117 and can be moved up and down e.g. by means of a suitable drive and positioner for adjusting the reflector 115 in relation to the outer tube 108. In order to compell reflector foil 115 to assume the desired contour (parabolic), foils 115, 121 and 124 together constitute a cushion and pneumatically elastic backing 123 for the reflector foil. The connections 116, 118 and 113 support this cushion 123. Relatively low pressure therein sucks the foil 115 towards the inside. Points 120, 116, 118, 113 and 112 are all fixed position points in relation to which the foils curve inwardly. As stated, central pipe 117 holds the MHD system 27 in a holder 126. The air exit and thermodynamic low temperature of the MHD system is established through air conduction through slots 128 of central pipe 117. Pipe 117 is placed into a pipe 129 to which one can connect the several inlet and outlet ducts for the fluids needed to operate the generator, e.g. water and/or hydrogen, while hydrazine is discharged therethrough. The connection between 117 and 129 is a releasible one, so that the mirror can be collapsed and for example replaced by a different one, in case of damage and for repair or replacement. Bolts 130 permit the release. In order to orient the reflector towards the sun, tube 129 has a bellow like section 131 interposed. Spindles 132 bias the bellows axially but to a different extent thereby causing the entire assembly to tilt. The reflector assembly including annulus 122 will be placed in position over the pipe 129, but central pipe 117 (to which the joint 116 and lower foil 114 is fastened) is inserted into and secured to pipe 129 by means of the bolts 130. Next, tube 108 is inflated by introducing H.sub.2 whereby the arms 114 are unfolded and the cushion 123 is deployed. The final contour of reflector foil 115 is established by means of adjusting ring 122. FIG. 41 shows another version of the reflector construction which is actually preferred. Features common to both assemblies have been omitted. The difference arises from utilizing a smaller tube or hose 133 while a tensioning cushion 135 rather than the cable 119 of FIG. 40 are provided. Thus, one does not need mechanical operation of such cable. The cushion 123 is deployed by inflating cushion 135 through injection of hydrogen 111. Since that cushion adds buyoncy, bead-hose 133 can be made smaller indeed. The tensioning cushion 135 is established on its upper side by lower foil 124 of the reflector cushion, while a tensioned foil 137 forms the lower side of cushion 135. Foil 137 is connected to tube 133 along a joint-seam 136. Cushion 135 is stabilized additionally by a compartment 134, and as to central pipe 117 the connection to foils 124 and 121 is made thereat. Pivot joints 118 are still needed in arms 114; the latter run through the inside of cushion 135 and are protected by the H.sub.2 therein. After having described the reflector in which the MHD unit or units as mounted, I proceed to the description of construction details of the MHD modules. A unit 208 as per the system and method diagram of FIG. 8 is designed to be for elongated construction. Such an MHD unit should be amenable to mass production and easy to transport; light weight construction is preferred. Thus, the essential structure parts of a MHD unit constitutes similar pipes, tubes, and preshaped and punched sheets of about 3.0 mm gauge or less to be interconnected by welding. An MHD unit has uniformly hexagonal cross-section throughout its extension (see FIGS. 22 et seq, particularly the several cross-sections). This way, they can be clustered in honeycomb fashion (FIG. 20) to permit parallel operation of many units. Each MHD unit is, as far as construction is concerned, comprised of a supporting frame; the specific components for the MHD generator proper not being part of that frame; and an outer skin structure with as small a leakage rate as possible. If the MHD unit is not run on solar energy, nuclear fission and breeder materials must be included. The frame is the basic support structure into which are reacted all forces that are not transmitted to the outside or act from the outside onto the unit. The support frame is set up by six parallel tubes 8 and by partitioning and stiffening sheets traversed by and secured to these tubes. A central, but sectionalized tubing 7 traverses these sheets and constitutes also a part of the support frame. The skin structure is secured to the partitions. FIG. 12 shows a first partition 1 which is more in the nature of a subframe having a central sleeve 1x (opening 4) surrounded by six small sleeves 1y (opening 3) and held by struts 1z, while bars 1w provide for an outer hexagonal frame. This construction is provided primarily for transmission of forces. The length (transverse to the plane of the drawing) can be variable. This subframe 1 provides for maximum free cross-section of flow in axial direction. FIGS. 13 and 14 show a transverse partition 2 with a central opening 4, peripheral openings 3, and, optional, openings 5. The openings 3 receive tubes 8 (FIG. 15) and opening 4 may receive sections of the central tubing 7. If such tubings are inserted, a partition 2 provides for a true dividing partition as to the space outside of tubing 17 and around inserted tubes 8. The edges 6 of sheet-partition 2 are flanged and the openings may be beaded to obtain stiffening and to serve as welding flange. FIG. 15 shows by way of example a plurality of partitions 2 and central tubing 7 while being also traversed by the tubes 8. In addition, this Figure shows a small pipe or tube 9 (traversing an opening 5) serving as auxiliary fluid duct without, however, constituting a portion of the basic support frame. For this, partitions 2 are either seated on and welded to tubing 7 or partitions 2 receive and hold the light tubes 8, or both as shown in the central portion of the Figure. The Figure shows also that a partition sheet 2 when not on a tube 7 permits flow of the same medium in the central area or zone (not occupied by tube 7) as well as in the zone around the pipes 8. Reference numeral 10 denotes welding seams. FIGS. 16 and 17 show a modification of the partitions to be used in those cases where the MHD unit is to be partitioned beyond the inner skin so that the radial dimensions of this end wall 11 are enlarged. FIG. 18 shows a plug element 12 for closing any of the openings that receive tubes 8, or the tubes themselves, are to be closed and partitioned. These plugs are also welded and their cap like configuration permits placement of sensors and/or adjustment and actuating equipment. FIG. 19 shows by way of example placement of such plugs as well as the enveloping of the frame by a double skin. The inner skin 13 is made of sheet metal which is corrosion-proof as regards contact with the several materials e.g. lithium, particularly for the quite elevated temperatures that will occur. This inner skin is stiffened by means of welded-on corrugated sheet material 14 which transmits also any forces to the outer skin 15 seated thereon. The gap between skins 13 and 15 is denoted 20 and performs important functions to be described shortly. The inner skin 13 is, so to speak, continued at the one ends by a partition 2 and also inwardly, wherever compartmentalization of the interior space, outside of tubes 8 is desired; the partitions are welded to the skin at flanges 6. The welding seam will be removed if the inner skin has to be removed for access to the interior thereof. The same or other skin material is welded on, following e.g. repair, replacement or the like. The caps 12 close out openings 3. The other partitions 2, not serving as true space dividers for compartmentalization need not to be welded to the skin 13. The outer skin 15 is loosely seated on the corrugated sheathing 14, the latter being welded only to skin 13. The outer skin is axially terminated by connection to a (larger) partition or axial end wall 11. The respective welding seam 17 is also removable and restorable for access and its openings 3 are also plugged by caps 12. The central tubing 17 can be closed e.g. by means of a cylindrical plug 18. This plug 18 carries a ball 19 at its end, serving e.g. as suspension element, for adjustment particularly when the unit is combined with others, and as storage space. A module as such is identified by numeral 27. FIG. 20 shows a plurality of such units in honeycomb assembly. One of them is shown in cross-section next to a partition 2. One can see inner and outer skins 13, 15 as well as the corrugated stiffening 14. Specifically, each of the skins is made from three segments such as 22, 23 which are welded together. The welding flange 24 of the inner skin 13 projects into the axial gap 20. Flange 24 is intrumental in adjusting the disposition of outer skin 15 as well as for mounting control and sensor lines or heating cable 26. These lines and cable run to the several caps 12. The welding flange 25 of outer skin 15 is shown in inward extension but could project outwardly. In the case of butt welding, no such flange is needed. The gap 20 between the two skins as well as the space 21 at one front end serve for enhancing reliability of the system. For example, space 21 may be held under low pressure which can be monitored and supervised to detect any leakage. Space 21 communicates with gap 20. In parts the gap will serve as duct for circulating a heat exchange medium, such as liguidous metal. If the unit is run on nuclear energy with fission and breeding sustained inside of the unit, gap 20 serves as thermal insulator. As stated, the basic elements for the construction of the supporting frame are sheets, used for its transversal stabilization, and tubes. In detail, there are sheets, extended in longitudinal direction, thus forming longitudinal partitions or subframes 1 as well as sheets extended in vertical direction, thus forming vertical or transverse partitions 2; there are, in addition, the central tube 7, the tubes 8 of smaller diameter located outside of the central tube as well as the small tubes 9 of lowest diameter used for internal connecting piping. All these elements are also used to construct the main components of the MHD-module, enclosed the various compartments F, G, H . . . S and T, U, V . . . X, Y, infra, and connected with the supporting frame and construction as described. As a rule for supporting frame, it is a rule also for the components, that only punched, deformed (shaped) and flanged sheets are used but major lathe work is not required; the aim is to permit the one-line production of MHD-modules with a very high output capacity. The MHD-converter, however, is the one exception from this rule; for this component coils have to be wound, stator blocks to be assembled and coils must be insulated as well as inserted into the stator blocks. The MHD-converter, however, is installed as a single unit in a central tube (7) section and can thus be removed or replaced easily in case of module replacement, which might be necessary when the permissible number of operations hours was reached (due to corrosion, for example). This central, MDH converter can be reused in the same way nuclear fuel pins or the MHD-working fluid, composed from both the tfd- and mfd-working fluids, can be reused in another module. The first step of production is the construction of the supporting frame, while the second step consists in the leak detection of the skeleton; in the third step, therefore, the various components have to be fixed and are connected with the supporting frame. It is a useful approach to assemble the modules on turntable which in turn is mounted on a carriage. Normally the module is positioned horizontally on that carriage; in the fourth step, however, when the module is jacketed by means of the inner skin, the module on the turntable should be shifted into an upright position. This upright position is needed also for the fifth step of production including leak detection of inner skin, fixing of sensors, cables and heaters. During the sixth step, when the outer skin has to be attached, the horizontal position is preferred. (This car for module assembling is not shown in any drawing). FIGS. 21, 22 and 23 show the entrance section (in regard to the exergy) for an MHD-module with an internal nuclear power reactor as heat source. The space between any two adjacent partitions of the supporting frame of the skeleton construction, is named a compartment, and these compartments are respectively identified by A, B, C . . . . Nuclear fuel elements 28 as provided in the form of the well known fuel pins or rods are located inside of a central tube 7 of the skeleton and supported therein in the usual way by means of a grid 29. The breeding material 30 is located outside of the central tubing 7 within the compartments A, B, C and D thus forming the blanket, fixed at the partitions 2. The coolant, which is at the same time the mfd-working fluid, passes first through the blanket 30 and will be reversed in its flow direction while entering slots 32 in the central tube 7 and flows along the fuel pins 28 thus passing through the grid 29. For radiation shielding in axial direction a neutron absorber 33 forming layers of small pebbles and preferably being flooded by the coolant, is located within a large plug 18 as well as in the central tube 7 and in the free space between the external tubes 8 in compartments E and F. The gap 20 and the cavity 21 covering over the entire length of compartments, are filled with a protective gas of low pressure for thermal insulation. The outer skin 15 is discontinued within the compartment E and substituted by a relatively short segment 42 of the inner skin. Both of the welding seams 43 can be removed easily in order to facilitate any partial dismanteling of the module, especially for purposes of replacement of the nuclear material. The compartment E is, for this reason, subdivided in a nuclear and a non-nuclear half-compartment by the additional partition 2, serving for a distinct reliability control. Details concerning the circulation of the mfd fluid will be discussed shortly when explaining the preferred embodiment. FIGS. 24, 25 and 26 shows the, in the alternative, input part of an MHD-module wherein energy input is provided from an external heat source, such as, in this preferred example, from the sun. The gap 20 between outer skin 15 and inner skin 13 is, therefore, used in daytime for the transmission of heat from the outer skin. Skin 15 is directly exposed to solar radiation 35 over the entire length of compartments A, B, C and D, and absorbs the radiation. The gap 20 adjacent compartments A to D is filled by a circulating heat exchange medium such as a liquidous alkali metal, e.g. sodium which is heated through direct contact with the outer skin and heats the inner skin 13, which in turn is in direct contact with the non-gaseous phase of the mfd-working fluid composed from Li, Li(NH.sub.2) and Fe-particles. At nighttime, gap 20 has to provide the thermal insulation. In the daytime, the circulation of the mfd-working fluid for purposes of heat exchange and receiving solar energy is as follows. The non-gaseous phase of the mfd-working fluid 31 returns from its magnetohydrodynamic work functions and arrives at compartment D through tubes 8a, 8c and 8e, after having traversed compartments M, L, K etc. The fluid leaves the three tubes 8a, c and e at compartment D and enters the free space between the central tube 7 and the axial, inner skin 13 in order to undergo heat exchange with an alkali metal such as sodium which circulates in gap 20 between skins 13, 15. The circulating sodium absorbs solar energy, or, more accurately is heated by the outer skin which has absorbed the solar radiation 35 adjacent to compartments D, C, B and A. The mfd-fluid coolant then enters the central tube 7 via the slots 32, and the central tubes guide the fluid through tube 7 towards compartment G and to further components of the MHD-module located in the compartments G, H . . . . At night, the central tube 7 is the main heat reservoir of the module as far as the mfd-fluid is concerned. As one can see from compartment D in FIG. 25, the space outside of tube 7 is closed by one of the partitions 2, and that space receives mfd fluid through the exits of tubes 8a, c, e as stated. The chamber to the right of the partition 2 separating compartments D and E is filled with sodium 16. The same is true with regard to the space or chamber around central tube 7 in compartment F, denoted 39 and being separated on both sides (i.e. from compartments E and G) by means of partitions 2. Tubes 8b, d, f transport the sodium between these chambers in compartments E and F outside of central tube 7. The sodium enters the gap 20 of compartments A through D through slots 40 in tubes 8b, d, f in compartment E and through an annular slot 20a in skin 13 in the same compartment. The sodium advances all the way to the left of the lefthand partition 2 of compartment A to fill space 21. This way, sodium surrounds the mfd fluid in compartments A through D for transferring absorbed solar energy to that mfd fluid. It should be mentioned that chamber 39 (space around 7) is filled predominantly with pressurized N.sub.2 during daytime to force the sodium in the chamber in compartments E and F into the gap 20 of compartments A to D. During daytime operation, the righthand portion of compartment E i.e. the chamber around tube 7 and to the right of the central partition 2 of that compartment as well as to the left of the partition 2 separating compartments E and F is under vacuum (or low pressure N.sub.2). The same is true always with regard to the portion of gap 20 adjacent to compartments F, G, H etc., for purposes of thermal insulation of these compartments. The purpose thereof will be described shortly. As can be seen from FIGS. 24 and 25, a helical tube 34 loops around tube 7, traversing the space occupied in the other compartments by tubes 8 (the latter terminate adjacent the dividing line between compartments D and E). This tube 34 has small lateral openings to disperse a mixture of N.sub.2 and H.sub.2 into the mfd-fluid within the annular space between skin 13 and tubing 7. As stated above, this liquid is composed of Fe, Li and Li(NH.sub.2). The Li(NH.sub.2) content thereof has been lowered (and the Li content has been increased) by process to be described as that fluid returns to compartments A to D via tubes 8a, c, e. The solar-heated lithium reacts with the N.sub.2 and H.sub.2 as supplied via tube 34 and as dispersed into the fluid to form Li(NH.sub.2) under catalytic reaction, using the dispersed Fe particles as catalyst. The chemical process has been described above, presently I describe the physical set up as to how to obtain that reaction. Tube 34 actually ends in compartment A, it enters compartment E as straight tube of small dimensions and is run to that point as straight tube from compartment S, traversing all the compartments inbetween. The connection of tube 34 to external supply for N.sub.2 and H.sub.2 (see FIG. 8) is made at that compartment S. At night, due to the lack of solar radiation, the gap 20 at compartments A to D has to be emptied from the liquid metal (sodium) for obtaining thermal insulation of these compartments. In this preferred example given here, flooding of the gap 20 with a liquid metal and emptying takes place automatically by making use of the ball-shaped reservoir 19. During daytime, ball 19 is also exposed to solar radiation pressurizing the protective gas 37 (N.sub.2) therein. The reservoir 19 is connected by a thin pipe 38 with the reservoir 39 for the heat exchange liquid metal 36 (sodium) located at compartment F. In case the gas pressure in reservoir 19 decreases due to lack of radiation heating, the gas contracts and sucks the liquid metal 36 out of gap 20, through the slots 40 within the three tubes 8 b, d, f of compartments E, F and will enter the reservoir in compartment F. Both, the three tubes 8 as well as the space 39 of compartment F are hermetically separated from the other compartments and from the corresponding parts of tube 8, respectively, by welding the partitions to the inner skin 13. Additionally, plugs 41 are inserted into the three tubes 8 d, d, f in the level of the righthand partition 2, separating compartment F from compartment G. These plugs permit utilization of pipes 8b, d, f to the right as conduits for other fluid (namely, high pressure N.sub.2). It should be mentioned, that upon emptying space 21 and gap 20 adjacent to compartments A to D from sodium, an insulative gas may be used as replacement. Also, some of the openings 40, either those in E or those in F may be closed by means of valves to confine the sodium to chamber 39 in compartment F. The gap 20 surrounding compartments F, G, etc. is always used for thermal insulation, and, therefore, filled with a very low pressure protective gas; this section of gap 20 is separated from the gap 20 at compartments A through D by the additional (central) partition 2 in compartment E. The respective subcompartments around tube 7 communicate separately with these gap 20 portions respectively, to the left and to the right of compartment E. The outer skin 15 is interrupted here but there still is present a short segment 42 of the inner skin isolating the annular gap 20a and 20b from the two chambers of compartment E into the portions of gap 20 to the left and to the right. The welding seams thereat can be removed easily to permit partial dismanteling of the module when needed. The FIGS. 27, 28, 29 and 30 show the compartments F through L as continuing compartments A, B . . . F. Compartments F and G, shown again in FIG. 27 and to be taken in conjunction with FIG. 28, depicts the connection, so to speak of two major components. The one major component is the solar energy absorber, mfd fluid heater and Li(NH.sub.2) synthesizer as established by compartments A through F and as described in the preceding paragraphs. The other major component is the two phase fluid portion of the system as continued in the MHD device. The linkage between these major components is as follows: The partition 2 separating the space around tube 7 and of compartment F from the analogous space of compartment G, separates therewith the sodium reservoir 39 from space occupied by low pressure N.sub.2 (compartment G). That N.sub.2 is separated from the N.sub.2 supply through tube 34 and is also separated from gas 37 of reservoir 19. In fact, the N.sub.2 in chamber G is the decompressed gaseous phase of the MHD working fluid. FIG. 25 shows only the continuation of tubes 8 in compartment G; plugs 41 in pipes 8b, d, f prevent flow of sodium into compartment G; the same pipes will receive high pressure N.sub.2 (tfd) arriving in compartment G from chamber R. Pipes 8a, c, e continue to pass mfd fluid (Li, Fe and some Li(NH.sub.2)) towards compartments D just traversing compartments F, G, H etc. on their return path from compartment M. Compartment G in FIG. 25 shows these pipes only, additional equipment for that compartment is shown in FIG. 27. Central tube 7 feeds hot mfd fluid, enriched with Li(NH.sub.2) into the end of compartment F. Tube 7 is interrupted in compartments G and F, and particularly closed off by an axial end partition 7a traversed only by three inlet pipes 44a for three mixing chambers 44 being provided for mixing the tfd- and mfd-working fluids. Specifically, chambers 44 combine hot, Li(NH.sub.2) enriched mfd fluid from tube 7 with pressurized tfd fluid N.sub.2 arriving in tubes 8b, 8d and 8f (to the right of plugs 41 in the dividing plane between compartments F and G). The mixing chambers intercept these tubes; the sodium flow in these tubes is blocked off by these plugs 41. Each chamber 44 has two nozzles, there being six nozzles 45 accordingly; only one of the nozzles 45 is shown in FIGS. 27 and 29 for the sake of clarity; the others are disposed in corresponding positions. The nozzles 45 are provided inbetween respective adjacent tube 8; the mixing chambers intercept them as stated above. These mixing chambers are of course respectively connected to tubes 8b, d, f to receive high pressure tfd gas N.sub.2. They are partitioned and the partition runs right in the plane of the section view of FIG. 28. Pressurized tfd gas (N.sub.2) enters the portion of the mixing chambers to the right of that partition while hot mfd #1 liquid is to the left of that partition. Small tubes traverse the partition as well as the chamber portion to the right thereof and run the hot mfd #1 liquid right to the entrance of nozzles 45 (two per mixing chamber). The pressurized tfd gas flows directly to the nozzle entrances. The tubes 8a, c, e just pass through the chambers 44 without connection as return of the mfd liquid towards compartment D. The nozzles 45 provide for the acceleration of both of the two working fluids as they mix in the entrance of the nozzles and beyond. As outlined above, the pressurized tfd fluid (gas) is heated upon being mixed with enriched mfd fluid and expands isenthalpic in nozzles 45 thereby accelerating the mfd fluid (see equations (1) and (2), supra). The mfd liquid is broken up into droplets, being hurled towards and through compartment H, in which two working fluids are decoupled. As a consequence, the entire space of compartments G, H and I inside of skin 13, but with the exceptions of tubes 8, is filled with depressurized N.sub.2. This depressurized N.sub.2 follows then generally (arrow 47) a flow path along tubes 8 and on the outside of the continuation of tube 7 which contains the MHD generator in compartments J, K, L and M. The liquid phase of the mfd fluid is ejected by the nozzles 45 towards the entrance for the MHD generator in compartment J for being focussed therein to establish a free flowing jet. The kinetic energy of that jet has, of course, resulted from acceleration by the isothermally decompressing tfd fluid in nozzles 45. In the MHD generator the kinetic energy of the mfd fluid jet is converted into electrical energy causing the jet to decelerate. As already mentioned, the MHD-converter proper is installed in a segment of central tube 7. This segment is connected to a longitudinal partition 1, being a part of the supporting skeleton so as to transmit the large forces from the free jet, due to its deceleration, to the tubes 8 of the system. The central tubing 7 is also used to separate the MHD-converter proper in regard to the tfd-working fluid 47, which flows along the central tube 7, on its outside, after expansion and upon separation from the mfd-working fluid 31. It should be mentioned, that the magnetic focussing affects the liquid phase only (Li--Li(NH.sub.2)--Fe) and is appropriately effective in front of the entrance to the MHD generator. The gaseous phase (N.sub.2) upon leaving nozzles 45 experiences a sudden enlargement in cross-section and looses momentum. Sheets (not shown) in compartment N could provide for diffusor effect to slow the flow of tfd-gas. Moreover, this N.sub.2 is not affected by the focussing. Hence, the N.sub.2 will be separated from the liquid phase in compartments H and J by the dynamics of the process generally, and by focussing of the liquid phase in particular. The nozzles 45 direct generally the flow of fluid towards a focal point 52, but the gaseous phase separates while the liquid droplets are guided towards that focal point. For this, a separator 57 and Coanda lip 58 is disposed ahead of the MHD entrance enhancing fluid-mechanically the coagulation of the liquid droplets as well as focussing thereof; the gaseous phase flows along a different path. Specifically, liquid droplets in the two phase stream hitting separator 57 on the inside form a film on the inner surface. The six jets are in fact combined and the common film continues along the outside of Coanda lip 58 with a radial inward component for leaving the lip as a hollow jet lamina which becomes a "solid" core jet on focussing by the magnetic coils in the MHD device. The hollow core and converging film collects liquid droplets still inside while the residual gaseous phase is squeezed out. The segment of central tube 7 housing the MHD-converter proper, is deformed conically in compartment J to establish the converter entrance. The MHD-converter includes stator blocks 48, and ring-shaped or annular coils 49 are disposed for magnetizing this stator core. Specifically, the stator blocks are of comb construction being arranged along the center axis, around that axis whereby the teeth of the combs point radially inwardly. The coils 49 are annular coils arranged in the gaps between the teeth, looping around the center axis. The coils are for example interconnected analogous to a three phase asynchronous machine, the connection pattern being repeated along the axis so that upon energization a travelling wave is produced with a flux vector dB/dt in and along the center axis, coinciding with the axis of the jet of mfd-1 fluid. The inner diameter of the comb-coil structure increases in the axial direction jet flow and the axial spacing between comb teeth decrease in that direction. The arrangement operates at constant frequency, but the jet looses kinetic energy and widens to some extent. As stated above, the stator coils are connected to capacitors to obtain a self-exciting oscillating system tuned to the desired frequency of the travelling wave produced (e.g. 2.5 Khz). Since the machine operates as generator, electrical energy can be taken from the coils e.g. to run the H.sub.2 electrolysis (see FIG. 8). Additionally, the jet functions analogous to a short circuited rotor and consumes electrical exergy in the electrolysis for splitting Li(NH.sub.2) into Li and NH.sub.2. A particular coil 50 is disposed right at the entrance and is separately energized. Coil 50 energizes particularly pole-shoes 51 for magnetically focussing the the liquid phase in the focus 52 on the central axis of the module. The magnetic field at the entrance and as set up by the coil 50 and pole shoes 51 is strongly inhomogenous but of radial symmetry to cause the droplets to converge towards the center axis. The magnetic field is that of a magnetic lens and induction causes a magnetic field to be set up in the droplets forcing them in direction of decreasing field strength to obtain a compact jet. Any residual gas is forced out of the jet. It should be noted that magnetic focussing and Coanda lip mutually reinforce the focussing. Actually, either device may suffice by itself in principle. A central, axial duct 53 is formed by the annular arrangement of stator blocks which duct is enlarged in diameter downstream; the duct is sealed hermetically and physically established by a thin walled tube 54, which should have very low electrical conductivity. Tube 54 thus separates the jet from the stator blocks 48, and coils 49 and 50. The free space 55 between stator blocks and coils or, to put it differently, the annular space between tube 7 of the MHD generator and tube 54 is filled with a coolant, preferably N.sub.2, bypassed from the tfd-working fluid after its isothermal compression; the piping necessary is not shown here. This particular coolant leaves the coil space of the MHD-converter at elevated temperature through the slots 56 and pours into the duct 53, along the inner wall of tube 54, between it and the free jet of mfd liquid. Thus, the free compact jet of the mfd-working fluid is guided and held apart from the wall of tube 54 by a residual fraction of the tfd-working fluid to serve as bearing or cushion. The free jet is not directly shown in the Figures, but can be understood to coincide with the axial center line in compartments K and L. By operation of the movement of a free flowing conductive jet (liquidous Li, Li(NH.sub.2) and, primarily the iron particles therein) through the coils 49, the coils are inductively energized. The coils are connected with capacitors as stated above and the interaction with the moving conductive jet acts as stimulus for causing the coil-capacitor system to oscillate and its resonance frequency is e.g. 2.5 Khz. As a consequence of the oscillation, and due to the three phase and periodically repeated connection and disposition of the coils 49 along the jet path a travelling magnetic wave is produced by these coils. Since there is a relative movement between jet and travelling magnetic field, i.e. there is a finite slip s, the oscillation is not attenuated but amplified. The work for this amplification is taken from the kinetic energy of the jet and the latter is retarded. As a consequence of this magnetic field set up by the coils 49 and interacting with the mfd fluid, a circular electric field vector (looping around the central axis) is established therein, and the resulting voltage in the jet causes electrolytic decompositioning of the Li(NH.sub.2), separating the lithium from NH.sub.2, whereby the dispersed Fe particles serve as bipolar electrodes. The iron particles should have dimensions of about 10.sup.-2 to 10.sup.-4 cm. Nevertheless these particles readily float and move with the jet. The electric field vector being closed around the axis of the jet is of course an oscillating one, and the iron particles serving as electrodes move within the jet. Hence, the electrolysis performed is not carried out in relation to fixed electrodes establishing surfaces of constant electro potential vis a vis a potential difference relative to the electrolyte. Rather, the electric field strength is constant along a closed field line and is not a gradient of a potential field. The oscillatory, closed loop field when sufficiently strong causes a displacement of electrons i.e. from the NH.sub.2.sup.- ions to the Li.sup.+ ions, everywhere along a field line and per se independently from the existence of these electrode--iron particles. The Maxwell equation, curl E+B=0, yields a voltage by integration along a closed field line, provided of course B.noteq.0 which is true due to the oscillatory energization by the resonating exciter coils which produce the time variable inductance B. That voltage is not taken in relation to the electrodes, but is the effective voltage acting on an electron that finds itself on a closed loop field line. The electrodes have a different function. They provide for electric conductivity in the mfd #1 liquid as a whole which per se is a poor conductor except for the iron particles. The chemically produced electrons (as split off the NH.sub.2.sup.- ions) are moved as far as electron conduction and current flow is concerned, primarily through the metal of these electrode particles. Since the metal of the electrode particles dominates in the electronic conduction, a strong (instantaneous) current will flow indeed in the jet, in effect transporting electrons from NH.sub.2.sup.- to Li.sup.+ in the otherwise poorly conductive mfd #1 liquid. That current is of course an oscillating one and is representative of the electron transfer in the liquid from the NH.sub.2.sup.- ions to the Li.sup.+ ions. The oscillating nature of that electrolysis producing current does not cause alternation between electrolysis and decompositioning, because the jet flows rapidly as a liquid stream and the NH.sub.2 will combine into (NH.sub.2).sub.2 which is an exergonic reaction and occurs spontaneously. There is the possibility of re-separation of the hydrazine into NH.sub.2 ions, however, hydrazine is a gas at the operating temperature (800.degree. K.) and will tend to leave the liquidous mfd fluid. Thus, the newly formed hydrazine will separate from the liquid jet and interposes itself as a gas cushion between the jet and the tube 54. The metallic lithium that remains just enriches the lithium content of the mfd #1 fluid. As we leave FIG. 24, a somewhat expanded Li-Li(NH.sub.2)--Fe liquid jet leaves along the axis. The lithium content was increased and the Li(NH.sub.2) content has been depleted. That jet is surrounded by a cushion formed by a mixture of N.sub.2 and hydrazine (gaseous), but still flowing in the diverging tube 54. It should be noted, that the field induced in the jet is actually carried out of the MHD coil systems and decays relatively slowly thereby sustaining further electrolysis which is particularly conductive at this point to prevent recompositioning of Li and NH.sub.2 in the hot fluid, bearing in mind that catalytically effective Fe particles are still present. Outside of tube 7 decompressed N.sub.2 (tfd) flows parallelly thereto, also to the right. The six tubes 8 of course transport separately returning mfd fluid and pressurized tfd fluid to the left for use as outlined above. The FIGS. 32, 33 and 34 present the compartment M, which contains the exit of the MHD-converter combined with structure for the jet capture. At this place, a further separation takes place. The residual gaseous phase, which accompanied and cushioned the liquid jet, is at the same time (chemically inert --N.sub.2) the protective gas for the hydrazine formed within the jet. The portion of tube 7 in compartment M does not contain any coils. At some point in compartment L a partition between tubes 7 and 54 confines the pressurized N.sub.2 gas in the annular space between these two tubes, right at the end of the coil arrangement of the MHD generator in compartment L. That also is the end of tube 54, and tube 7 is now filled with a mixture of N.sub.2 and gaseous hydrazine, still surrounding the liquidous but significantly slowed down jet. The jet is captured in a venturi pipe, jet capture tube 62. This tube is held inside of tube 7 by means of two partitions 63, defining a chamber into which the captured liquid phase--mfd flows, through lateral pots 62a in tube 62. This particular chamber has three outlet pipes 65a, c, e respectively connected to radial connections 67a, c, e which run the liquidous phase, i.e. Li--Fe with residual Li(NH.sub.2) into the three pipes 8a, 8c, 8e (compartment M) which return this exhausted mfd liquid to the compartment D. The jet capturing tube 62 is subjected to very large forces which have to be reacted into the skeleton; this will be done by the central tube 7, which supports the capturing tube 62 by the two sheets 63. The free space between the tubes 7 and 62 defines the chamber in which the liquid mfd is collected and has the same internal static pressure as the end of the capturing tube has, which is equivalent to the jet stagnation pressure. In order to approach as much as possible the theoretically maximum stagnation pressure, which results from the residual kinetic energy of the free jet when leaving the magnetic field, the capturing tube 62 is contoured by an insert to reach optimal diffusor function. Accordingly, diffusor tube 62 repressurizes the mfd fluid for its return to the heat absorption chambers of compartments A to D. The three pipes 8a, c, e returning the pressurized mfd fluid to compartment D are provided with plugs, i.e. internal portions 41 right in the dividing plane for compartments M and N (actually establishing this division). These same three tubes or pipes, 8a, 8c, 8e, receive the mixture of hydrazine and N.sub.2 from the interiolr of tube 7 as surrounding the jet, but not having entered capture tube 6. The N.sub.2 -hydrazine mixture is evacuated from the interior of MHD tube 7 via the suction type tubes 59 which connect to tubes 8a, c, e via tubes 66a, c, e. The slots 60 in the suction tubes can be closed by movement of (internal) pistons operated by servo-mechanism 61. The suction closing device is powered by an internal pressurized gas system and rendered operational if the non-gaseous phase in form of the free jet does not meet completely the jet capture tube 62 or fills the MHD-duct 54 to such a degree, that liquid overflow could cause mfd liquid to enter the ducts 49. This may occur, for example, during exergy transformer start up procedure. It should be mentioned that valves are provided in the connection between tubes 8b, d, f and chambers 44, which can be closed whenever the two phase-operation is to be interrupted. This may occur in an emergency when, for example, power is not extracted (for reasons of output failure) from the liquid jet in the MHD converter so that the jet would hit with its full impact the baffle 7a. That would produce a dangerous shock. However, upon interrupting the flow of pressurized tdf gas into the chambers 44, the acceleration of the liquid phase is interrupted. Please note that this emergency equipment was termed jet spoiler 200 in the block diagram of FIG. 8. Closing of slots 60 by mechanism 61 takes also place in this case and the latter equipment is part of the jet spoiler 200. As stated, the tubes 59 lead through the jet capturing chamber (in sealed relation) established by partitions 63 and into compartment N. Radially extending connecting tubes 66a, 66c, 66e discharge tubes 59 into pipes 8a, 8c, 8e as they extend to the right from the partititions 41 in these pipes along the M/N dividing line to run the hydrazine--N.sub.2 mixture out of the MHD generator portion. The low pressure N.sub.2 --tfd which separated in compartments H and J from the mfd liquid and flows along the outside of tube 7 containing the MHD generator, around tubes 8 and enters compartments N, surrounding here all of the pipe and tube sections 66 and 67. The high pressure tfd gas passes through pipes 8b, 8d, 8f and through and along the MHD generator without participation until reaching the mixing chambers 44 in compartment G as described, except that a small portion may be tapped to feed the annular space between tubes 54 and 7 in the MHD generator chambers J, K, L. The pressurizing of the decompressed tfd fluiding arriving in N so as to close the circulation of the gaseous phase of the MHD system is carried out in the compartments to the right of N. It should be noted that the jet capturing function is actually reinforced by the tubes 59 for the hydrazine and residual tfd-working fluid suction as well as by the tubes 65 for the mfd-working fluid leaving the capturing device. The radial fluid transfer means 66, 67, which are used in mixing chambers 44 are, in principle, the same as used here to conduct the exhausted mfd and tfd fluids to the tubes 8 of the supporting frame of skeleton construction. The transfer means 66 and 67 for both fluids are arranged in two's and are designed to compensate, in addition, the jet's thrust. The compartment N could best be described as the transition connection and isolation zone between the MHD generator (and hydrazine synthesizer), and the equipment for recuperative heat exchange and repressurization of the tfd fluid. The recuperative heat exchange is contained basically in compartment O with input/output sections in compartments N and P. The repressurization of the tfd gas--N.sub.2 occurs in compartment Q. The heat exchange in heat exchanger O occurs between the low pressure tfd gas before compression, and the same but compressed gas (N.sub.2). The heat exchanger serves additionally to serve as hydrazine condenser. The heat exchange chamber 70 proper is established inside of skin 13 with a particular internal jacket 68 and between two partitions 2. These partitions run, of course, the tubes 8 through the chamber, whereby particularly, tubes 8b, 8d, 8f have a certain section plugged by plugs 41a, b while ahead and behind of the plugs, but still inside chamber 70 openings discharge the pressurized tfd gas, N.sub.2, into chamber 70 and collect it again. The high pressure tfd gas arrives in pipes or tubes 8b, 8d, 8f in compartment P, enters chamber 70 and circulates therein as indicated by the helical line, while leaving chamber 70 into pipes 8b, 8d, 8f through the lefthand openings to the left of the lefthand plug 41a. While circulating in chamber 70 the high pressure tfd gas N.sub.2 undergoes heat exchange, i.e. is being heated by the low pressure tfd gas N.sub.2 which has arrived in compartment N and is run through heat exchange chamber 70 by a multitude of thin tubes 69, only one being shown in FIG. 32, the multitude is denoted by dotting in FIG. 34. That low pressure tfd was separated from the liquid phase ahead of the MHD generator and flowed around tube 7 thereof until reaching the compartment N. The high pressure tfd gas N.sub.2 thus flows around tubes 69 in chamber 70 to receive thermal energy from the low pressure tfd gas before the latter is compressed. The three tubes 8a, 8c, 8e are normally used to conduct the mfd-working fluid, but not in the compartments upstream of the compartment M. A plug 41 to the left of compartment N closes these tubes; so that these tubes, 8a, c, e, can be used downstream of compartment M for other purposes, the one of which is to conduct the hydrazine and residual tfd-working fluid as already described. That residual tfd fluid served initially as cushion between the liquid jet and the tube 54 in the MHD generator. By passing through the heat exchanger section 70 in tubes 8a, c, e, both gases will also be cooled. These three tubes are, therefore, to be understood to serve as hydrazine condensers and are, therefore, covered at the inner surface with a wick-like structure 72 for sucking the hydrazine already condensed as well as for enlarging the condenser surface. The heat exchanger will be fixed on the supporting frame by welding. The liquidous hydrazine as caught by the wick-like layer 72 is thereby prevented from following the flow of the residual N.sub.2 in tubes 8a, c, e and is collected in reservoirs 78 at the righthand border of compartment P. From there it can be withdrawn via tube 79 for flowing into a collection tank (not shown). The residual tfd gas N.sub.2 which also arrived in pipes 8a, c, e in compartment P is passed through connectors 77 into the central portion of compartment P in which end also the tubes 69 following heat withdrawal in chamber 70. Compartment P is, therefore, provided for (a) hydrazine collection and withdrawal and (b) collection of the cooled low pressure tfd gas N.sub.2. The additional function, namely feeding the high pressure tfd gas into the heat exchange chamber 70 from tubes 8b, d, f was described earlier. Before continuing with the functional description and particularly the pressurization of the tfd fluid, it should be mentioned, that FIGS. 32, 33, 34 show further examples for the application of the three standard tubes 7, 8 and 9 as well as of the two standard partitions 1 and 2 within the compartments N, O, etc. Both, the recuperative heat exchanger as well as the MHD-converter are units, have been integrated into the supporting skeleton which includes tubes 8; the outer jacket 68 of the heat exchanger is made by using two vertical partitions 2 for the front sides, which are welded with a longitudinal partition 1 thus forming a hexagonal prismatic embodiment. Before inserting the six tubes 8 of the supporting skeleton in this embodiment, the numerous small diameter tubes 69 have to be fixed in the vertical partitions 2 thus completing the heat exchanger; the small diameter tubes are the standard tubes 9 normally used for internal connecting piping, and are here used to conduct the low pressure tfd-working fluid through the heat exchanger. The vertical partitions 2, and the bottom plate covering the large middle-opening of the transition are perforated by holes with beaded edges necessary to affixed the small diameter tubes 69 by welding. In FIG. 35 the construction of module components from punched and deformed sheets is demonstrated in detail at the transfer portions 66 and 67. The same principle is used for the nozzles transfer mains 44, which are, in addition, mixing chambers for both the working fluids. The transverse sheets 73 and 74 are beaded at edges in the same manner the partitions 2 are made, and they will be welded first on those edges which touch the tubes entering and leaving the transfer mains; in a second step the sheet 75, which plays the same role the longitudinal transition 1 does on other place, will be stripped over and connected by weldings. Continuing now with the system description, compartment P contains also the entrance to the compressor, provided as a nozzle downstream and formed by sheets 76 (shown only in one case). It should be mentioned at this point, that the low pressure tfd fluid when flowing from compartment M to compartment N is subjected to a diffusor action because of sudden enlargement in cross-section. In M, gas N.sub.2 flowed around the MHD converter containing tube 7 which ends at the dividing line between compartments M and N. Some sheets, similar to 76 could be provided here to provide a more gradual transition to the larger flow area and cross-section in compartment N. The nozzle is formed by reducing the cross-section for tfd-working fluid flow in compartment P until the entrance cross-section of the isothermal diffusor 80 of compartment Q is reached. As stated above, the residual tfd-working fluid having accompanied the hydrazine, flows via the discharge outlets 77 into the main flow of the low pressure tfd gas in compartment P. The hydrazine, already liquified, is protected from being carried further by means of the wick-like structure, and as stated, will flow into the reservoir 78 to be emptied through the tube 79. The diffusor 80 for obtaining at least approximately isothermal compression of the tfd-working fluid N.sub.2 is located in compartment Q. In order to obtain isothermal compression of the tfd gas N.sub.2, it is caused to undergo heat exchange inside of and while passing through the diffusor. Before however describing that heat exchange, the completion of the circulation of the tfd gas N.sub.2 (closing of the loop of the gaseous working fluid) shall be described first. The low pressure tfd gas N.sub.2 as entering nozzle 76 of the diffusor is compressed in diffusor 80 and leaves it for compartment R, inside of a continuation section of central tubing 7. Three suction tubes 88 (FIGS. 36, 37) suck the pressuized tfd gas out of that chamber and transfer pipes 89 connect these three suction tubes to the three tubes or pipes 8b, d, f. These tubes transport the pressurized tfd gas N.sub.2 to the heat exchanger where it leaves these pipes temporarily for circulation in chamber 70 around tubes 69, and returns to tubes 8b, d, f for transport to the mixing chambers 44! This then completes the circulation of the tfd fluid--gas N.sub.2. The particular portion of the tubes 8b, d, f used otherwise for N.sub.2 gas recirculation, are closed with a plug 41 in regard to the compartments S, T, . . . ; this section houses the valves and their servo-mechanisms, not shown here, for shutdown of recirculation. This way these particular tubes 8, reserved otherwise for gas recirculation, can be used at night as reservoir for already pressurized tfd-working fluid. Appropriate valves are installed within the transfer ducts for the gas, coupled in action with the valves of the duct for the mfd-working fluid 1, which is the central tube 7. The FIG. 28 shows bellows 91 of the valve drive mechanism. The internal pressurized gas servo system is not shown here, as this is optional equipment not needed in principle. The tfd fluid N.sub.2 while being subjected to compression in diffusor 80 is additionally chilled through intimate contact with a fluid termed in the following mfd-2. The reason for referring to this fluid as a magneto-fluid-dynamic fluid is to be seen in that it is or at least could be pumped as a coolant by means of a MHD type pump. The mfd-2 fluid is preferably Li(NH.sub.3) and enters the flow of compressing tfd-N.sub.2 in diffusor 80 of compartment Q. In particular, the walls of diffusor 80 are porous in order to permit the mfd-working fluid 2 to leak from its reservoir 81 in the back and around the diffusor 80 into the flow of N.sub.2, for intimate mixing therewith. Droplets of mfd #2 are actually carried along by the flow of gas, thereby causing this mfd #2 liquid to be accelerated and moved. The inner surface of the diffusor is actually enlarged by a wick-like structure 82 made from wire gauze, and the mfd-2 liquid discharges therefrom into the diffusor interior for evaporative cooling of the compressed tfd gas N.sub.2 while intimately mixing therewith. This cooling of the tfd fluid establishes its low temperature so that the compression work is minimized (see equation 3--supra). This cooling process leads to the lowest temperature of the tfd fluid, but involves comparatively little heat transfer in the steady state, as the low pressure tfd fluid has lost recuperatively heat exergy to the high pressure tfd fluid in heat exchanger 0. The mfd-2 fluid arrives at compartment Q from compartment R via tubes 8a, 8d, and 8e. Please note that these tubes are not used otherwise in compartments Q and R, plugs 41 in the dividing plane between compartments Q and P retain the hydrazine--N.sub.2 flow in these pipes 8a, d, e in compartment P (arriving there from N and O). The mfd-2 coolant will be pumped either by MHD-pumps, not shown here, or moves by capillary forces into these pipes 8a, d, e and in compartment R. It will be recalled, that the pressurized tfd gas N.sub.2 is collected in the central chamber of compartment R. Actually, the compressed gas N.sub.2 is subjected to strong baffle action when entering compartment R and hitting cold wall 85 so that liquidous or condensing components (including e.g. carried along (NH.sub.3)) drops off and is not returned. The mfd-2 fluid arrive in the same chamber. This coolant mfd-2 precipitates on the surface of cold fingers 86 and is caught by the wick-like gauze layer 82 and seeps through ducts 87 into the space, outside of tube section 7 around tubes 8 in compartment R. From there, the mfd-2 fluid is pumped, as stated above, by means of MHD pumps or by capillary forces into tubes 8a, d, e for return to compartment Q. This then completes the circulation of the mfd-2 fluid. The primary function of the mfd-2 fluid (Li(NH.sub.3)) is to provide for isothermic conditions for the compression of N.sub.2 in diffusor 80--compartment Q. The mfd-2 fluid receives heat in this process which is to be removed from that fluid in a manner described shortly. Presently however, it should be described that mfd-2, i.e. the Li(NH.sub.3) performs an additional function. The tfd-gas N.sub.2 following its separation from mfd-1 fluid in compartment I and also in compartment M will carry certain portions of the mfd-1 fluid as non-gaseous component, and here particularly, Li(NH.sub.2). That component is carried along, enters even diffusor 80 and will go into solution in the dispersed mfd 2 fluid. Other substances, e.g. may have been removed from the tfd flow by baffle action in compartment R, as the pressurized tfd gas N.sub.2 was being returned and any precipitation was collected and removed in the lining 82 in compartment R along the wall of tubing 7 and discharged therefrom through openings 87. All accumulated liquid is then pumped from compartment R back to compartment Q, through tubes 8a, 8c, 8e. These particular portions of tubes 8a, 8c, 8e in compartment Q are used also to house a regeneration device 83, in which the carry over of mfd-working fluid 1 in form of Li(NH.sub.2) should be eliminated. This device 83 is made from sheets or sintered components of the elements Ca or Mg and absorbs by chemical reaction the NH.sub.2 -groups dissolved within the mfd #2 coolant Li(NH.sub.3). By the action of this regeneration device the Li-content of the mfd-2 liquid increases continuously. Preferably at night, when the exergy transformer is not in operation due to lack of exergy supply, the trapping material of regenerator 83 has to be regenerated; for example, by thermal dissociation of the metal-amides formed during the daytime operation, into NH.sub.3 and N.sub.2. In addition, the deposited lithium has to be flushed out. The regeneration device 83 is connected for this reason not only with the reservoir 81 for mfd-2 (=Li-NH.sub.3) but connection is to be made also to feed the excess lithium back into the reservoir for mfd 1 fluid. For this, one can use the tube 34 which passes N.sub.2 and H.sub.2 into the system but is not used in the night time. Thus, tube 34 will be connected with regenerator 83 during the night to feed the Li into compartments A, B, C, D. The regeneration device 83 has to provide both, the recirculation of NH.sub.3 formed in excess as well the recirculation of Li accumulated in the coolant mfd-2 liquid (Li-NH.sub.3), back into the mfd-working fluid 1 as resting at night. Both components are dissolved at low temperature and will be transported in liquid phase via the line 34 into the mfd-1 reservoir; the reaction of the NH.sub.3 -component with Li to form Li-amide and H.sub.2 takes place at higher temperature, in the morning. This double use of line 34 does not interfere with the injection of N.sub.2 and H.sub.2 along the same line 34 for the synthesis of hydrazine, for these processes take place only at daytime. FIGS. 36 and 37 show the separation-chamber and heat exchange chamber between primary and secondary coolant and contained predominantly within the compartment R; this component, again, is composed from the standard tubes and partitions. The primary coolant is the fluid mfd-2 and the secondary coolant is provided for external heat exchange, for example, with air. The reason for this separation is to be seen in the necessity of removing spurious components of mfd 1 fluid from the tfd-gas as outlined above and the mixing of the latter with the coolant (mfd-2) necessitates provisions for the cleaning process. This particular circulation of mfd-2 fluid should be held as short as possible to prevent the mfd-1 residue from clogging the circulation ducts. This is the reason for not using mfd-2 also in direct heat exchange with ambient air (requiring large areas and zones for flow). Basically, however, the cooling process undertaken by mfd-2 is the primary one and determinative of the low point in temperature for the tfd gas N.sub.2 ; the other coolant is merely provided as heat transport and decoupling agent due to the aforesaid additional function of the mfd-2 circulation (mfd-1 residue capture). The recompressed tfd-working fluid N.sub.2 (leaving the isothermal diffusor) is reversed in flow direction in the central tube 7 inside of compartment R and distributed into the three tubes 8b, d, f of the main frame. The chamber wall 84 is made of a section of the central tubing 7, and is welded into two vertical partitions 2, constituting therefore a part of the support frame. In addition, the coolant fluid, called mfd-2 and providing for the isothermic compression of the tfd-gas, is separated from the compressed tfd gas N.sub.2 as was outlined above and pumped back through the regenerator 83. Still in addition now, the mfd-2 coolant is to be cooled itself by means of the secondary coolant, circulating through compartments R through Y. In order to obtain immediate heat exchange between mfd-2 (primary coolant) and secondary coolant--hollow fingers 86 are inserted into the chamber defined inside tube section 7 of compartment R. These fingers extend from a bottom plate 85. Fingers 86 are also made from the thin standard tube 9, which were also used in the recuperative heat exchanger (69). The hollow fingers 86 thus penetrate the interior of the said separating chamber in compartment R and are cooled from the inside by evaporation of the secondary coolant flowing therein. The secondary coolant can also be Li(NH.sub.3) or any other suitable coolant which will evaporate on heat exchange with the mfd-2 fluid but can be condensed by heat exchange with ambient air. It was mentioned above that all surfaces of the separation chamber are covered with a wire gauze 82 of wick-like structure; the primary coolant, when condensed at the cold fingers, leaks within the capillaries of wick to pass through the suction slots 87, and then to MHD-pumps, not shown here, which pump the now liquidous mfd-2 coolant through the regeneration device 83 into the reservoir 83. The central tube 7, forming the separation and heat exchange chamber in compartment R, is extended into the compartment S and has a cylindrical, hollow insert 92, serving as recipient chamber for the evaporated secondary coolant. This insert 92 is closed by the bottom sheet 85, which in turn is penetrated by the hollow cooling fingers 86 communicating with the interior of insert 92. These fingers are welded onto beaded edges of holes in the bottom plate 85. Insert 92 constitutes a structural unit and will be shifted into and welded to the central tube 7 at their respective righthand ends. The secondary liquid coolant Li(NH.sub.3) is supplied via the pipe 83 from the compartments T, U . . . and distributed to the various hollow fingers 86 for evaporation therein. As shown for one finger, but is valid for all, an inner coaxial tube 94 in each finger leads the coolant to the tip of the finger 86, where it leaves the respective tube 94 in order to wet the internal surface of the finger for evaporation. The vaporized coolant is collected in the gas chamber of insert 92 and is passed by means of three radial ducts 95 into three of the six tubes 8 in chambers S, T, etc. and running through an air cooler therein. It should be mentioned at this point that all of the six tubes 8a through f are plugged by means of plugs 41 along the dividing line between compartments R and S. The tubes 8a, c, e hold primary cooling fluid (mfd-2=Li(NH.sub.3)) to the left of these plugs, and tubes 8b, d, f pass pressurized tdf fluid --N.sub.2. All tubes 8 to the right of these plugs in the dividing plane between compartments R and S are available for passage of gaseous secondary cooling fluid (evaporated Li(NH.sub.3)). Only three of the tubes 8 are actually used for feeding the evaporated secondary cooling fluid into the cooler (compartments U et seq); the other three tubes 8 are used as store for liquified secondary coolant, and pipes 93 return the liquified secondary coolant to the fingers 86. The free space 21 between insert 92 and the vertical partition 11, holding the righthand axial end of outer skin 15 communicates with the gap 20 in axial direction. Due to the fact that the outer skin 15 will not be thermally extended and contracted to the same extent the inner skin 13 will probably be, the vertical partition 11 is not directly welded to the tubes 8, but indirectly through interposed, length compensating bellows 96. The bellows, however, are placed between compartments S and U, and the righthand end of bellows are fixed to the tubes 8 at the end of compartment T by means of welding seams 99. The gap 20 (filled with protective gas at very low pressure) is continued within the bellows. All parts, including the tubes 8 of compartments T, U . . . are not covered by skin and are, therefore, exposed to ambient air. The central opening of a particular vertical partition 11 is normally used for receiving the central tube 7, but that opening is closed in compartment S by means of spherical deformed sheet 97, positioned for exposure to the surrounding coolant air flow. In this half-sphere, the ion-getter-pump 98 is installed, which has to provide the very low pressure for the gas circulating in gap 20 between the inner and outer skins 13, 15 respectively. The heat exchanger in FIGS. 38 and 39, operating as between the secondary coolant Li(NH.sub.3) and ambient air occupies all of compartments U, V, W, X and Y, as well as the air flow outlet in compartment T. The heat exchanger is likewise made from the standard parts employed throughout and will be installed as a unit and connected to the main portion of the MHD-module by the welding 99. The heat exchange unit is composed from the six standard tubes 8, the central tube 7 and from modified longitudinal frame parts 1. Three of the tubes 8 are used for the transfer of the gaseous secondary coolant; slots 100 permit the gas to pass through and to touch the inner surfaces of the heat exchanger for condensation. The other three tubes 8 are used as a reservoir for the liquified secondary coolant, pumped into by a MHD-pump 101. The tubes 93 take the liquidous secondary cooling from these tubes. The longitudinal transition 1 is shown slightly modified. It is composed from the segments 102 and 103, which serve here as outer and inner skin, respectively, of heat exchanger; both these segments are deformed in a way resulting in channels 104 and 105 offering a maximum surface area to the coolant air. The segments are, for this reason, as well as for stabilization, corrugated (in the same manner as the corrugated sheet 14 for the reinforcement of inner skin 13). Both segments are joined at lips 106 by weldings. The segments will be covered before assembling on their inner surfaces with a wire gauze 107 with wick-like structure providing enlargement and also wetting of the surface. The coolant air is supplied from the compartment Z (not shown here), which is coupled to the air duct. The air leaves the MHD-module at compartment T. The hoods 12 house the sensors for control of continuous air flow. One condition for the exergy transformers operation is to focus solar radiation on the entrance heat exchanger of MHD-module resulting in an increase in flux density by a factor of 1000. A second condition is to supply the MHD-modules with cold air in large quantities for removal of the waste heat of MHD-process; a third condition is to separate both N.sub.2 and H.sub.2 O from the coolant air (in cases where no water is available at ground level) to be the ducts for exergy storage. There are two solutions to the problem, depending upon the location of the exergy transformation: if the transformer is to be used in the arid or tropical hot zones between, say 30.degree. and the equator, then the problem is to a lesser degree the availability of solar radiation, due to the climate, but the availability of water if the transformer is to be used in the moderated zones between say 30.degree. and 60.degree. latitude, then the availability of solar energy is the more dominant problem due to frequent clod covers. In either case, the solar exergy must be focussed. After having described the equipment by means of which to use solar (or other nuclear) exergy for obtaining the synthesis of hydrazine, several of the critical aspects of the operation and of the process as a whole shall be discussed and here particularly the interaction of the fluids and of the magnetic fields as well as the overall MHD conversion process. It will be recalled from the description of FIG. 8, that the gaseous medium tfd-fluid, N.sub.2 has a central position. From the description above it can readily be deduced how the gaseous phase and medium called tfd actually drives the two liquids, mfd #1 and 2. In one case (mfd #1) the liquid is accelerated out of the mixing chambers 44 by means of the nozzles 45, in the other case, the tfd gas actually causes the mfd #2 liquid to evaporate and to otherwise mingle with the gas in the diffusor 80 thereby actually driving the liquid (mfd #2) as part of and within its circulation. In both instances there is a generalized thermodynamic force as a result of a temperature difference between the tfd gas and the respective mfd liquid; in both cases there is isenthalpic pressure change, expansion in one instance, compression in the other. The three essential properties of the interaction between tfd and mfd fluids, particularly the tfd gas and the mfd liquid are depicted in FIG. 9. There is a close analogy with the electromagnetic interaction between the magnetic field as set up by the coils 49 and the self-consist or eigen field of the mfd #1 liquid jet. These interactions are interactions via forces resulting from local non-equilibrium. These forces require certain energy which is lost otherwise. The interactions can be weak or strong which depends on the ratio of transferred exergy by operation of the interaction in relation to the total exergy content of the media (or fields). The strength of the respective interaction is adjustable by means of adjustment of some of the parameters that determine the process. The work ability a.sub.exp (exergy content) of the tfd gas is transferred by means of the viscous interaction with the mfd #1 liquid in mixing chambers and nozzles (44, 45) as follows: kinetic energy as imparted upon the mfd #1 droplets: kinetic energy of the tfd; internal losses to sustain the interaction. The forces X; of the interaction result from local imbalances or non-equilibrium such as the velocity differences of the two fluids. As a consequence, a momentum I is produced by operation of thermodynamically irreversible processes. The products of forces and flux (of momenta) is the loss of exergy needed to sustain the interaction. ##EQU14## The exergetic efficiency of the viscous interaction in the two phase nozzles 45 as the sum of the respective efficiencies for either fluid results in ##EQU15## wherein the single (') refers to the mfd #1 liquid and the double (") refers to the tfd gas. The viscous interaction in the exergy transformer as described is adjusted to be strong (in contradistinction to known MHD process) operating with a plasma or a liquid metal-gas emulsion as MHD work fluid. Specifically, the exergy transferred from the (expanding) tfd gas to the mfd #1 liquid is so large that both media assume comparable specific kinetic energy following interaction in the nozzles 45. The decisive parameter in FIG. 9 is the relative proportion X of the tfd fluid in relation to the total mass flow. ##EQU16## for 0.2&lt;.times.&lt;0.3, i.e. to the right of the maximum of the specific kinetic energy e".sub.kin of the mfd #1 fluid, one obtains the strongest interaction. For X.fwdarw.0 (gas-metal emulsion) as well as for X.fwdarw.1 (plasma process) the interaction approaches zero. The two fluids employed here are predominantly Li and N.sub.2. They interact in a temperature range between 750.degree. K. and 850.degree. K. One can in fact obtain a ratio of .phi.'=e'.sub.kin /x.multidot.a.sub.exp =0.5 and .phi."=e".sub.kin /x:a.sub.exp =0.3 with a total nozzle efficiency .phi..sub.nozzles =0.8. Using e'.sub.kin and e".sub.kin separately is the logical result of a strong viscous interaction. Since the tfd gas (N.sub.2) has transferred in nozzles 45 the maximum possible exergy and is "exhausted" in this respect, it would not serve any purpose to run both fluids through the MHD converter process. This is quite different from MHD processes with weak viscous interaction. It is for this reason that one separates the fluids in compartment J. This in turn permits the utilization of e".sub.kin of the tfd gas for obtaining the isothermic compression in compartment Q, at low temperature. The specific kinetic energy e'.sub.kin of the mfd-working fluid 1 is extracted in form of electrical energy in the course of the electro-dynamic interaction in compartments K and L. FIG. 10 shows the transfer of compression work. In analogy to the viscous non-equilibrium interaction between the tfd and mfd #1 fluids; I now proceed to the description of the electromagnetic interaction in the MHD generator. The working fluids of the exergy transformer are separated in compartment I by means of two steps. In the first step the homogenous distribution of both fluids--as can be found within the two-phase nozzles--will be disturbed downstream of the nozzle. This has been achieved by the parallel operation of the several nozzles 45 all oriented towards an axis and to point of convergence 152, common to all nozzles. The non-gaseous phase has a much higher density and, therefore, higher inertia than the gaseous phase; it tends to maintain the initial direction concentrating itself in the neighborhood of the axis common to the nozzle system upstream of the point of convergence, while the gaseous phase expands to fill the empty space of compartments H and J around the free jet being formed. Within the area of jet formation X.fwdarw.0, outside of the free jet in being X.fwdarw.1; in both these regions the strength of viscous interaction decreases continuously. Due to the components of velocity of the converging stream normal to its (desired) flight direction, and due to some residual weak viscous interaction a compact liquid mfd-free jet will not be formed spontaneously; the gaseous phase, at the other hand, will be expanded further as caused by the increase of cross section (compartment N) for flow towards to the suction channels. The second step of separation results by electro-magnetic interaction. Kinetic energy of the mfd #1 working fluid is extracted and re-supplied in form of electrical energy; by this, forces are exerted on the different droplets performing work to stop motion normal to the bulk (axial) flight direction, causing them to coagulate. The MHD-converter proper can be defined as that area of the exergy transformer, in which the electrodynamic interaction takes place in order to extract kinetic energy from the mfd-working fluid #1 and to transfer it (via the systems boundary) in form of electrical energy. The MHD-converter is composed from numerous annular coils 49, which surround the mfd-working fluid #1 flowing free, concentric to the center axis of the system. The entrance of the coil system is located near the point 53 of convergence, upstream thereof and in a region, in which the free flowing mfd-working fluid is not yet a compact jet. As stated above, the distance between the different coils 49 decreases in flow direction while their diameter increases. The coils are inserted into statorblocks 48 formed of comb like construction so that, on the one hand, the magnetic field is guided for travelling along but outside of the free jet, and on the other hand forces are transferred from the free jet to the exergy transformer coils. The coil system is a three-phase system, in general excited with the same constant frequency f, and is coupled with a capacitor bank to be able to oscillate self-excitedly. Electro-magnetic energy is shifted periodically between the coils and the capacitors; the magnetic field generated by the coils forms in total a magnetic wave or travelling field with a phase velocity decreasing in direction of motion: ##EQU17## .lambda. is proportional to the distance of coils, .omega.=2.pi.f, k=2.pi./.lambda. (wave-number). The electro-dynamic interaction caused by this device, is essentially an interaction between two magnetic fields, which are the field B.sub.extern of the coils and the field B.sub.eigen carried along with the mfd-working fluid 1 at the velocity of fluid v.sub.fluid. The exergy transferred during interaction is energy of the electro-magnetic field. The reason for including coils as well as the mfd #1 liquid in the interaction is to be seen in that both of them are the conductors for electric currents which in turn generate the magnetic fields. The mfd-working fluid, in addition, supplies the exergy to be transferred during interaction at the expense of its kinetic energy. The interaction is based--in the same way as does the viscous and thermal interaction--on a local non-equilibrium, given by the relative velocity (v.sub.fluid -v.sub.phase) between both magnetic fields. At the origin of the second field, within the mfd-working fluid #1, an electrical field E is generated (due to the transformation of the homogenous Maxwell-equations for an inertial system in motion): ##EQU18## The electrical field exerts a force on the electrical charges within the fluid, and it is this force, which is the generalized force of interaction--not the Lorentz-force. The resulting (generalized) flux is the electric current, given by the electrical conductivity .sigma. of the mfd #1 working fluid; the specific current density j is (due to the fact, that the velocity vectors are parallel in this interaction): ##EQU19## s is the slip defined by--s=(v.sub.fluid -v.sub.phase)/v.sub.phase. The specific internal consumption for sustaining the interaction, eigenconsumption of interaction, is given by: ##EQU20## Exergy for extraction is transferred during interaction by the field B.sub.eigen. That field B.sub.eigen can be calculated from the inhomogenous Maxwell-equation with j to be the source-term. B.sub.eigen is shifted in phase in regard to B.sub.extern by a phase angle of .pi./2. This is the reason, one can calculate the amplitude .vertline.B.sub.eigen .vertline. from the other amplitude .vertline.B.sub.extern .vertline. without considering the total field B.sub.total : ##EQU21## (j.sup.2 =-1) The ratio of both amplitudes is: ##EQU22## with R.sub.m =.sigma..multidot..mu..multidot..mu..sub.o .multidot.v.sub.phase /k being defined as magnetic Reynolds-number. .mu..sub.o =.pi.4.multidot.10.sup.-7 Vs/Am, .mu.=relative permeability of the liquid. The stability of interaction leads to the condition: ##EQU23## .+-.s.multidot.R.sub.m =1 is the condition for maximal strength of interaction; in this case is .vertline.B.sub.eigen.vertline. =.vertline.B.sub.extern .vertline., and the energy of the field is proportional to: ##EQU24## The power factor of interaction is given for .+-.s.multidot.R.sub.m .ltoreq.1: ##EQU25## The maximum value is (in this first order approximation) cos .phi.=1/.sqroot.2=0.705. The exergy for this interaction is used both for internal, i.e. eigenconsumption and, to a much larger extent to maintain the local non-equilibrium which means the continued generation of the field B.sub.eigen from the current-density j within the mfd #1 working fluid. This second part can be calculated from the specific force exerted by the external field via the currents j upon the liquid: ##EQU26## To shift the mfd #1 working fluid at the velocity v.sub.fluid under the (retarding) influence of this force, the specific work ##EQU27## has to be performed, and will be taken from the kinetic energy of the fluid. Inertia force of fluid and Lorentz-force have, therefore, to compensate each other. The net exergy transferred during interaction is: ##EQU28## The exergetic efficiency of interaction is given by (the well known formula): ##EQU29## This electro-magnetic interaction as described thus far does not include the stabilization of the free jet--focussing of mfd #1 working fluid to obtain a compact jet, guidance and focussing when flowing within the coil system--nor does it include the electro-synthesis of hydrazine. All these different processes consume exergy for the work to be expended on and in the jet; this work must be performed also by making use of the above discussed interaction, because the jet flows freely and is not in contact with any wall! For this purpose, additional generalized forces according to equation (18) have to be generated by local variation of the slip -s and of the external B.sub.extern. The exergetic efficiency .phi..sub.converter of the non-idealized interaction is always lower than .phi..sub.MHD, for this number is related to an infinitively extended undisturbed field and a constant slip. It should be noted, that the slip -s of the MHD-converter is not constant (locally) even without stabilization of jet for the following reason. If all the coils 49 were to be excited with the same frequency f, then the phase angle between voltage and current should be the same for all coils. This, however, means that .vertline.B.sub.extern .vertline.=.vertline.B.sub.eigen .vertline. and, hence, -s.multidot.R.sub.m =1. Because R.sub.m is proportional to v.sup.2.sub.phase /.omega. and must decrease along the fluid path, the condition of a constant phase angle, .phi.=const. can be met only by increasing the slip in flow direction! The focussing of flow at the entrance of MHD-converter is achieved by changing the sign of the slip s as well as by proper adjustment of field B.sub.extern at the entrance section J (which can be supported by a surface separator upstream). The jet as formed thereat runs over a distance of a few wavelengths under-synchronously, not over-synchronously, exergy is supplied to the jet at that point; the distortion of the magnetic field lines at the entrance to the converter results in focussing forces k.sub.Lorentz acting on the fluid particles in which a current can flow. For this purpose the first coil or the first few coils, adjacent the entrance (compartment J) are not excited together with the other coils; the phase velocity of the magnetic wave and its harmonics can, therefore, be controlled independently. A similar method can be used for augmenting the synthesis of hydrazine; it is possible, as an example, the last part of the coil system of MHD-converter to operate in the brake-mode by reversing the phase velocity. This method also might be based on a separate excitation of that part of coil system. After having described viscous and electromagnetic interactions, I now turn to an overview as well as details of the principles of the MHD-process within the exergy transformer and regarding MHD-converter, two-phase nozzles 45, recuperative heat exchanger (compartment O) and the diffusor 80 for recompressing the tfd gas. It is the advantage of the free jet MHD-converter operating with a radial field, that the jet will be stabilized in the direction of axis of coil system. The currents induced are annular currents and flow anti-parallel to those in the coil for excitation. The problems resulting from the use of side bars and of finite width as known from flat channel type MHD-converter have been avoided. A real problem is posed by the condition that the external magnetic field must be closed by means of and through the jet; the flux density being necessarily very high. This is a reason for limiting the wavelength; this length should not exceed in average 0.1 m. The high velocity of the fluid has as a consequence that the MHD-converter will be operated at a frequency in the kHz-range. Due to the skin effect in Cu, the currents will penetrate no more than 0.5 mm; the coils 49 are actually made from small tubes with a thin wall, cooled inside by a coolant. For .lambda..sub.average =0.1 m, v.sub.phase average =250 m/s follows f=2.5 kHz. The electrical conductivity of Li is at 750 K about .sigma.=10.sup.7 1/.OMEGA.m; for the Li-LiNH.sub.2 solution .sigma.=10.sup.6 1/.OMEGA.m is a good estimate. The magnetic Reynolds-number is: ##EQU30## wherein .mu. is the permeability of the mfd #1 liquid. That liquid is made to assume a permeability by adding modest quantities of iron to serve as the catalyst for the Li-NH.sub.2 -synthesis as well as the bipolar electrodes for the Li-NH.sub.2 -electrolysis. The use of iron can also solve the problem of a strong electro-magnetic interaction even within the free jet MHD-converter of the exergy transformer. The specific work a.sub.MHD performed during interaction (27) is related to unit volume while the specific kinetic energy of the fluid v.sup.2.sub.fluid /2 is related to unit massflow. Therefore, in the steady state of operation, the specific work of interaction, integrated over the volume of the free jet, must be the same as the difference in total kinetic energy of the jet and before and after the interaction: The first basic condition for the exergy transformer is: ##EQU31## The condition (30) can be met under the following assumptions: ##EQU32## then: ##EQU33## the only free parameter is .mu., which is the permeability of the liquid to which iron particles have been added. Under the stated conditions, the parameter is .mu.=4.9. Since iron has a permeability roughly between 100 and 1000, rather small quantities of iron particles suffice to obtain that low permeability for the liquid as a whole. Under these assumptions the power density of electro-magnetic interaction within the free jet converter amounts to 2.56 kW/cm.sup.3, the average magnetic Reynolds-number R.sub.m .apprxeq.25, the average slip -s=0.04, the average slip frequency -s.multidot.f=100 Hz, the average loss density (in form of heat) is about 100 W/cm.sup.3 (equivalent to the power density within the blanket of a fast breeder reactor). The specific kinetic energy of working fluid at entrance is v'.sub.in.sup.2 /2=61.5 Ws/g. A free jet with an entrance diameter of d.sub.in =3 cm has a fluid power of about 15 MW if increased in diameter to d.sub.ex =6.7 cm. Due to -s&lt;&lt;1 is .phi..sub.MHD .apprxeq.1.0. Under the assumption of a more realistic exergetic efficiency of MHD-converter of .phi..sub.converter =0.75 the net electrical power extraction is N.sub.electrical =11.2 MW. The induced electrical field E.sub.average is given by equation (18) and for the brake-mode with s.gtoreq.1, .vertline.E.sub.average .vertline..ltoreq.2.5 V/cm, which is sufficiently high for the LiNH.sub.2 electrolysis with its specific exergy consumption of about 2.2 (electron) volts. S.gtoreq.1 results from phase inverted connection of the coils more downstream, but excited with and by the same frequency and preferably included in the oscillator coil-capacitor system as a whole. The residual kinetic energy of both the tfd- as well as the mfd #1 working fluid will be needed for the recirculation of these fluids using diffusors realizing the ram-jet principle. However, about 90% of the recompression is used to bring the tfd gas back up to the operating pressure for isenthalpic expansion in the nozzles 45. The total kinetic energy of both fluids, at the end of viscous interaction (15) amounts to: ##EQU34## Kinetic energy will be extracted from the mfd #1 working fluid within the MHD-converter according to equation (30): ##EQU35## The tfd-working fluid is, of course, not affected by the processes within the converter. The residual kinetic energies are: ##EQU36## The principle of ram-jet operation demands, that the residual energy of the respective working fluid covers both the theoretical compression work, the internal, eigenconsumption as well as work for recirculation within the loop. The second basic condition for the exergy transformer is: ##EQU37## The condition (34a) for the mfd #1 working fluid (which is the basis for the project MHD-staustrahlrohr*) with an one-component mfd-working fluid) has been met without any major difficulties. The compression work is calculated to be a'.sub.comp =(p.sub.upper -p.sub.low)/.rho.'.sub.mfd due to the incompressible fluid. The theoretical stagnation pressure is for the assumptions made before about 28 bar, which is sufficiently high to tolerate high exergy losses by the jet capture in compartment M; the residual energy is 0.04 times the kinetic energy of the working fluid before entering the MHD-converter. FNT *ram jet tube The condition (34b) for the tfd-working fluid, however, is the critical one and is decisive for the realization of the exergy transformer. In the case of isothermal compression in diffusor 80 according to (2) and (3) one obtains compression work to be equal to: ##EQU38## The residual kinetic energy at the termination of viscous interaction is characterized by .phi.".sub.nozzle following (15); one can describe the exergy necessary for eigenconsumption during compression in diffusor 80 and recirculation--including friction losses within the recuperative heat exchanger--by introducing the exergetic efficiency: ##EQU39## using (35), the condition (34b) reads: ##EQU40## In case of this exergy transformer the condition (36) has to be fulfilled by controlling the strength of viscous interaction varying the ratio x/(1-x)=m.sub.tfd /m.sub.mfd of both fluids as well as by choosing proper the ratio of densities .rho.'/.rho." (at beginning of expansion). If 0.4.gtoreq..phi.".sub.nozzle &lt;0.45 (see FIG. 9) the parameter x can vary between 0.2 and 0.3. The permissible range, in which .phi.".sub.ram jet may change is for T.sub.upper =750 K and T.sub.low =250 K: ##EQU41## For a temperature of 300 K, the figures vary only by about 20%. These numbers can be reached by an adequate design. Due to the following relations: ##EQU42## the specific expansion work can be calculated; using x=0.3; .phi.'.sub.nozzle =0.4; .phi.".sub.nozzle =0.43 the expansion work is a.sub.exp =360 Ws/g; from this the exit velocity of the tfd-working fluid follows to be v".sub.ex =557 m/s according to the specific kinetic energy v.sub.ex ".sup.2 /2=155 Ws/g. After separation the tfd-working fluid approaches the velocity of sound ##EQU43## In order to reduce the friction losses during recuperation according to the limits given by the second condition (34b) or (36) respectively, the velocity of the tfd-working fluid has to be decreased by adiabatic deceleration within diffusor (compartment N). The eigenconsumption of exergy for the recuperation can be approximated applying the Reynolds-analogy between the specific heat flux and the shear-tension: ##EQU44## v" is the velocity during recuperation, .DELTA.T" is the temperature difference between hot and cold fluids, .xi. is a factor describing shape of heater tubes. (37) is the second term of the right side of equation (35) for .phi.".sub.ram jet ; this term should not exceed 0.1. For .xi.=0.81, .DELTA.T"=50 K must be, therefore, v"=35 m/s. FIG. 11 is an temperature-entropy diagram for both the tfd-working fluid N.sub.2 and the mfd #1 working fluid Li-LiNH.sub.2 -Fe. The tfd-working fluid is decelerated and adiabatically after separation from the mfd 4/ working fluid, before recuperation (compartment N); when leaving the recuperative heat exchanger (compartment P) it will be accelerated again. The rise in temperature caused by deceleration is used for heat exchange in compartment Q. The pressure ratio .pi. can be calculated from the ratio of the expansion work utilized a.sub.exp =360 Ws/g to the maximum possible expansion work R.multidot.T.sub.upper .multidot.ln.sub.max =750 Ws/g: ##EQU45## It is .pi.=5.35. The specific compression work is a".sub.comp =120 Ws/g. The tfd-working fluid entering the diffusor 80 (after loosing thermal energy in the recuperator) has to be cooled, which is achieved by evaporation of the NH.sub.3 component of the mfd #2 working fluid and at high velocity in the frontal portion of diffusor 80. In this case the viscous interaction is, however, weak, due to both the low densities and low fraction of NH.sub.3. It will be recalled, that the mfd #2 working fluid is basically a coolant. The process in the diffusor 80 is comparable to that within a heat pipe. The range of parameters of this process has to be selected in such a manner, that the local vapor pressure of NH.sub.3 and the pressure of N.sub.2 equalize only after the tfd fluid velocity has been decreased substantially. Thereafter, cooling by evaporation will be replaced by cooling on wetted surfaces. The variation of thermodynamic states of the mfd #1 fluid results from its function to be a heat storage medium; it follows: ##EQU46## c.sub.p '=4 Ws/gK (specific heat at constant pressure of Li-LiNH.sub.2); .DELTA.T' (temperature range of heat storage). Under the assumptions made before .DELTA.T'=38.5 K follows. The total efficiency of the process in the exergy transformer should be related to the conversion of the solar radiation absorbed to the electrical energy at exit of the coil system; it is defined, using (8) and with N.sub.el being the net electrical energy of the MHD-converter: ##EQU47## If the efficiency .phi..sub.MHD of interaction will be supplemented by considering total eigenconsumption, and if the slip s is understood to be the local slip, then the effective efficiency .phi..sub.converter can be defined by using the first basic condition (30) as follows: ##EQU48## The total efficiency .eta..sub.th can be decuded directly from (32), provided the second basic condition (34a+b) is actually met: ##EQU49## From the data mentioned before one finds .eta..sub.th =0.288; from this, the exergetic efficiency of the process is determined to be .phi..sub.process =0.432 due to .eta..sub.c =0.666. It is well known that processes in MHD-systems running both on lines of constant enthalpy and on isobares, will have a total efficiency, which is--in theory--comparable to those in nuclear power stations. MHD-systems of this kind, however, have been based on a weak viscous interaction maintained within the MHD-converter proper parallel to the electro-magnetic interaction which is, therefore, also a weak one (extraction from d.c. power at R.sub.m &lt;1). These systems can hardly be operated without movable boundaries (turbines as well as compressors). To summarize and conclude: The substantial improvement of the present MHD-process within the exergy transformer expressed by the high total efficiency if compared to the well known MHD-processes with condensation of the tfd-working fluid and recirculation by the ram jet principle, is achieved by utilizing the residual kinetic energy of both fluids. In addition, recuperation takes place independent from the expansion in the nozzles. It is important to note, that the electro-magnetic interaction includes separation of the two working fluids, and that this interaction takes place at high velocities and with high frequencies based on a free flying jet. The increase of the magnetic Reynolds-number R.sub.m up to 25 by ferromagnetic components of the mfd-working fluid #1 helps to solve the (old) problem of adapting the thermodynamic acceleration of the tfd-working fluid to the energy extraction in the MHD-converter, which was solved in all known liquid-metal-MHD-systems only by tolerating very large losses of exergy. It should be noted at last, that the exergy transformer will be operated in a technical most feasible relatively low range of temperatures which so far as not attainable to the systems mentioned before with both a strong viscous and electromagnetic interaction. .eta..sub.th according to (41) is not the total efficiency of the exergy transformer, or, in other words, is not the efficiency of the storage of solar exergy in form of free enthalpy of the chemical compounds (OH).sub.2 and (NH.sub.2).sub.2. Rather, .eta..sub.th is a very good approximation due to the fact, that the (exergetic) efficiency of chemical reactions is quite high in general; the internal, eigenconsumption of exergy is low. It seems to be not of major importance, that this eigenconsumption of the chemical reactions is not included in .eta..sub.th. The (OH).sub.2 -synthesis was found to reach technical efficiencies up to 90%; the last step of (NH.sub.2).sub.2 -synthesis (electrolysis of Li-NH.sub.2), however, needs only about 25% of the total electrical energy; even if the efficiency of this process (not known so far) is much lower, its influence on the total efficiency is softened due to the low weight. A compensation of losses seems to be possible utilizing by parts energy of the field B.sub.eigen carried along with the free jet for the Li-amide-electrolysis; normally this energy is lost. On the basis of the foregoing detailed explanation it will readily be understood that the peroxide synthesis can be carried out quite analogously and is run on a simplified basis because the coil-core-liquid system does not have to operate on the basis of thermo-fluid dynamic acceleration of the working fluid (though it could) but a pump (187--FIG. 8) is used instead. Also, the electrical energy is applied externally, namely from the MHD converter of the hydrazine and solar exergy exploiting system. The a.c. electrolysis is, therefore, used by interaction between coils and a watery solution of KOH used as circulating working fluid here, with metallic particles, preferably iron, but possibly Cu or Al being interspersed for the same reason, namely to establish conductivity in the otherwise poorly conductive electrolyte. The voltage needed here for electrolysis is also the result of the effect as expressed Maxwell (vector) equation B+curl E=0, and integration of E along a closed electric field line, looping around the axis of fluid flow, yields the voltage U (not a potential difference in a potential field, there is none) which is directly effective on electrons to move them from OH.sup.- to K.sup.+. In the following, it shall be described how the hydrazine and the generation of H.sub.2 (needed for the hydrazine synthesis) with concurring production of (OH.sub.2).sub.2 can be carried out by one basic fluid circulating system. For this I turn to FIG. 42. In toto, this system is more economical (fewer parts, no H.sub.2 storage, no electric transmission). The system is based on the (justified) assumption that as intermediate products M-NH.sub.2 and M-OH can be used with M standing for the same metal, particularly the same alkalimetal. The system, furthermore is based on the "compromise" that only one of these intermediate products is synthesized electrolytically, the other one chemically. The box 308 in FIG. 42 depicts the flow chart of this combination synthesis. Reflector 289 is the same as before and the same is true for the accumulation and extraction facilities 302, 286, and 279. A circulation 290 in unit 308 is now a circulation of M and M-OH, M being for example Li or K. Block 291 denotes the heating of that fluid by solar energy and block 292 denotes the adding of hydrogen and nitrogen to that liquid so that functionally M-NH.sub.2 is generated in block 293. This will be a catalytic reaction with iron for example serving as catalyst. Please note, that this amid-formation is not linked to the use of lithium but works with other alkali-metals as well. Thus far the situation is very similar to the function and steps as was explained above with reference to FIG. 8. However, the liquid now continuing to circulate is M, MOH and M-NH.sub.2. At point 295 and 281, water is added to the circulation. This is actually the entrance to the accelerator nozzles such as 45, supra. Thus, water is used here as the tfd fluid. The water evaporates and expands along 296 and accelerates the working liquid as before. However additionally, the water reacts with the M-NH.sub.2 and forms MOH+(NH.sub.2).sub.2 +H.sub.2. In other words, the hydrazine is the product of a chemical reaction of metal-amid and water under formation of H.sub.2 and hydrazine. Additionally, the residual metal is also converted into MOH+H.sub.2. Following the acceleration, the liquid phase consists essentially of MOH and M while hydrazine and hydrogen accompany the tfd gas (namely H.sub.2 O) in the liquid gas separation process. Please note, that more water is added at 295 than can react with the M-NH.sub.2 and the metal so that all of the M-NH.sub.2 decomposes under formation of hydrazine while excess water (steam) serves as the tfd gas performing the acceleration producing work on the liquid phase. The steam and H.sub.2 are separated at 297 analogous to the gas--liquid separation as described above. The gas includes also hydrazine which is precipitated by cooling in 301 because hydrazine has a higher boiling point than water. The water--H.sub.2 mixture (gaseous) is extracted as tfd fluid and subjected to recuperative heat exchange in 304 with isothermic compression (and condensation of the water) in 305 which is simplified in FIG. 42 but may well be constructed analogous to the detailed arrangement of FIG. 8. However, a mere recompression under cooling by air may suffice. The cooled and recompressed H.sub.2 and water is recirculated and heated in the recuperative heat exchanger. In view of the high pressure, the water remains in liquidous form so that the H.sub.2 can readily be separated therefrom in 282 for separate injection into the liquid fluid circulation respectively at 292 and 295. As far as the metal-hydroxide is concerned, it is subjected to mechanical and/or electromagnetic focussing at 298 (please note that iron particles are dispersed in this liquid), and in 284 the MHD conversion process takes place whereby substantially all electrical energy is consumed to obtain electrolysis M-(OH).sub.2. The (OH).sub.2 is flushed out at 285 and the tfd cushioning gas is also separated from the liquid phase at that point. Please note that the (OH).sub.2 is produced as a vapor that separates readily from the MOH--M jet and will be condensated for extraction. The block 303 denotes jet capture and to kinetic energy-to-pressure conversion for obtaining a return flow of the mixture of metal and metal--OH to the solar heat exchange and collector 291. The righthand portion of the drawing shows basically a flow path for air, 275, sucked into the system for cooling (heat exchange 305), separation of water 278 and extraction of nitrogen, 277. Reference numeral 276 refers to a blower which sucks the air. That blowr may have to be run by electrical energy from converter 284. That, however, is a very small load and will not interfere with the operation of the MHD generator. It can thus be seen that the MHD conversion process is used only for (OH).sub.2 generation. As far as the hydrazine generation is concerned, the essential functions performed by the MHD process is the reconstitution of the metal so that the solar energy can generate M-NH.sub.2 which subsequently reacts with water to obtain MOH and (NH.sub.2).sub.2 as well as H.sub.2 to be used in the synthesis of M-NH.sub.2.