Patent Description:
Devices for making and maintaining a permanent layer of ice are known to the general public. The systems used for this are, as a rule, heat exchangers, where the principle of refrigerant circulation is a pipe system, more or less extensive, in the form of pipe serpentines, with additional pipe connections. The systems may additionally have a manifold and a dedicated number of valves.

A device using a similar principle of operation, in particular the circulation of the refrigerant through the interior of the piping system, is the ice-making and ice-storage device described in <CIT>. A known solution reveals an arrangement of two pipe heat exchangers that overlap, being connected by flow channels. The ice mass builds up on the outside of the pipe system arranged in this way.

From the <CIT>, a cascade, two-stage refrigeration system is known, containing a thermoelectric module of a high-temperature cooling stage, thermoelectric modules of a low-temperature cooling stage, an interstage cold accumulator and a flow heat exchanger. The interstage cold accumulator consists of two horizontal plates - heat exchangers - upper and lower, separated by a working agent, where the upper exchanger has a concave, conical or spherical inner working surface, and the lower exchanger has a convex inner working surface. Both exchangers are mounted in the body and set coaxially with respect to each other and the body. The exchangers are mounted in a body filled with a working fluid, made of a material with low thermal conductivity, and they are arranged coaxially with respect to each other and the body. The working fluid, as a rule, is designed to freeze over and produce ice from it, which builds up between the plate top and bottom exchangers. The method of operation of the interstage cold accumulator known from this patent is that continuous thermal contact between the ice and the low-temperature stage is maintained, and the operation of the high-temperature stage is carried out in a cyclic cooling-heating mode, and the ice is cyclically formed in the form of layers, and between freezing cycles, thermal de-icing of the formed ice layer is carried out until the beginning of its ascent, ensuring its ascent before the melting of the previous ice layer is completed.

Other energy storage devices are disclosed in <CIT> and <CIT>.

For exchangers that are intended as cold accumulators in which the refrigerant, either liquid or gas, flows through a pipe system, the ice is frozen up outside this pipe system, and builds up around each pipe starting from the immediate vicinity of the pipe around which the water being frozen-up is located. Then, the ice being frozen-up usually increases in volume at a slower and slower rate, because, as it moves away from the pipe, and therefore away from the refrigerant flowing through the pipe, its impact on the water surrounding the pipe system decreases. The role of the chilling agent is taken on by the ice that has already formed around the pipe. Cold propagation therefore decreases with the passage of time, hence the rate of freezing up of the ice in the exchanger also decreases. Notwithstanding the inconvenience of decreasing the rate at which water is converted into ice, the unfavourable temperature distribution in the tank containing the water to be converted into ice may be increased, of which this generally applies to temperature irregularities at specific but different points in the water tank due to circulation obstacles. This can further slow down the build-up of ice.

In view of the above-mentioned structures, as well as the methods of cold accumulation disclosed by their design, and also in view of the prior invention applied for legal protection under No. P. <NUM>, it has become apparent that it is possible to improve the claimed invention, thereby ensuring both the security of a uniform ice build-up over time, and a reproducible and precisely time-predictable method of this build-up will be ensured, which method translates into long-term constancy of the parameters and operation of the system, with the possibility of significantly accelerating the processes of cold accumulation and recovery, and even extending these possibilities and speed by carrying out both the build-up and recovery of cold from the accumulated ice carrier at the same time. All of these processes will maintain a low probability in terms of service needs due to plant damage, whether mechanical or process, or service needs due to the high frequency of replenishment of utilities in the plant.

This is achieved with the device according to the present invention, which combines the possibility of using an unexpected refrigerant circuit with respect to previously known solutions, with methods already known and used previously. As a general rule, such a combination was not known, either in terms of construction, process or specific application according to the present invention.

A device, according to the present invention, for storage of energy, in particular cooling energy, is provided with a tank, preferably a circulation pump, and a heat exchanger, of which heat exchanger at least one cold accumulator located in the tank is a component. It is powered in terms of refrigeration by a cooling liquid refrigerant which is a carrier of the cold. In the tank, at least one cold accumulator is located, each enclosed by a mantle in the form of a spatial solid made of a thermal conductor, which spatial solid is filled with water and an air or vacuum buffer supplementary to <NUM>% of this filling, wherein the mantles of multiplied cold accumulators are, preferably inseparably and at a distance connected to the tank and/or to each other, and the distance between the mantles of the adjacent cold accumulators preferably ranges from <NUM> to <NUM>, wherein the tank is filled with a liquid refrigerant as a cold carrier, which refrigerant constitutes the environment of all the mantles of the cold accumulators contained in the tank, and wherein the liquid refrigerant constitutes the freezing thermal circuit of the cold accumulators bounded by their mantles. The invention is characterised in that the mantle surrounding the cold accumulator is a first mantle of said cold accumulator, while inside the first mantle, at a distance therefrom, still preferably by being connected by at least one thermal bridge, there is at least one second mantle of the same cold accumulator, wherein the outer environment of the second mantle is the cold accumulator, and the inner environment of the kind of filling of the second mantle is a refrigerant supplied and discharged by the second mantle from the outside of the cold accumulator, wherein the second mantle has a tubular entrance, and has a tubular exit connecting the second mantle to the freezing thermal circuit.

Preferably, the volume of the tank is not more than twice the volume of all the first cold accumulator mantles embedded in it.

Preferably, the liquid refrigerant constituting the freezing thermal circuit of the cold accumulators bounded by their mantles is directed by valves, at least one pair of valves, and preferably even three pairs of valves.

Preferably, the tank has at least one vestibule by which the external environment of the tank is separated from its refrigerant-containing chamber proper, the vestibule being at least one manifold.

Preferably, with two or more vestibules, at least one is a supply manifold, and at least the other is a return manifold.

Preferably, the manifold is separated from the chamber proper of the tank by a baffle, respectively the supply manifold by the first baffle and the return manifold by the second baffle.

Preferably, the mantles are incompletely submerged in liquid refrigerant.

Preferably, for every <NUM><NUM> of volume of all cold accumulators cooled in the tank, there is between <NUM><NUM> and <NUM><NUM> of refrigerant.

Preferably, the circulation pump is fixed in the tank, preferably permanently, being connected to the tank.

Preferably, the circulation pump is mounted outside the tank, and has a connection via a circulation duct with inlet and outlet pipes, to the tank and/or with a tubular inlet and a tubular outlet via the inlet port and the outlet port of the tank. Preferably, the inlet and outlet ports are positioned at opposite ends of the tank wall, the same tank wall, or on opposite tank walls, with the inlet preferably at the bottom of the tank, and the outlet preferably at the top of the tank.

Preferably, the tubular inlet and the tubular outlet are located next to each other in the same tank wall and/or in the same manifold baffle or interchangeably on opposite tank walls and/or in other manifold baffles.

Preferably, the tank is fitted with at least one rotor having blades, the rotor being fixed permanently, but preferably adjustable inside the tank.

Preferably, the tank is openable from the top, and is fitted with a lid, the lid being preferably attached to the tank via a stub pipe, preferably flexible one.

Preferably, at least one outer spacer insert is provided between the first mantle and the tank, preferably the spacer insert being connected to them disjointly.

Preferably, at least one inner spacer insert is provided between adjacent first mantles of the cold accumulators, preferably the spacer insert being connected to them disjointly.

Preferably, the inner spacer insert and/or the outer spacer insert is openwork.

Preferably, the inner spacer insert and/or the outer spacer insert is positioned with respect to the tank and/or with respect to the first mantle either spirally or in a labyrinth arrangement.

Preferably, the tank is fitted with at least one vertical baffle attached by its bottom edge to the bottom of the tank and by at most one lateral edge to the side wall of the tank, the vertical baffles being preferably positioned in the tank alternately, preferably with an offset.

Preferably, the tank is be provided with at least one horizontal baffle, uninterruptedly attached by its edges, preferably for at least <NUM>% of their full circumference, to the rounded wall or straight side walls of the tank, the horizontal baffles being preferably arranged alternately, preferably with an offset, in the tank.

Preferably, the tank is in the form of a cylinder with a circular or elliptical bottom, or in the form of a cuboid with a rectangular bottom, or in the form of a prism with a polygonal bottom, preferably regular, or in the form of a cylinder with an annular cross-section.

Preferably, the first mantle and/or the second mantle in the shape of a spatial solid is in the form of a with a circular or elliptical bottom, or in the form of a cuboid with a rectangular bottom, or in the form of a prism with a polygonal bottom, preferably regular, or in the form of a cylinder with an annular cross-section.

Preferably, the spatial solid of the first mantle is closed, and is provided with a filling valve and a vent valve.

Preferably, the bottom of the spatial solid of the first mantle is also a section of the bottom of the tank.

Preferably, the spatial solid of the first mantle is positioned in the tank relative to the bottom of the tank in a vertical, or horizontal, or intermediate position, preferably vertical with a possible deviation from vertical of not more than <NUM>° of angular measure, and at the same time the second mantle is positioned in the first mantle in an adequate position, where the mantles are preferably coaxially positioned relative to each other.

Preferably, the spatial solid of the first mantle in its cross-section has a longest diagonal not longer than <NUM>, but preferably not shorter than <NUM>.

Preferably, the spatial solid of the second mantle in its cross-section has a longest diagonal not longer than <NUM>, but preferably not shorter than <NUM>, however, not longer than <NUM>% of the diagonal length of the first mantle.

Preferably, the spatial solid of the first mantle in its longitudinal cross-section has a longest diagonal not longer than <NUM>, but preferably not shorter than <NUM>.

Preferably, the spatial solid of the second mantle in its longitudinal cross-section has a longest diagonal not longer than <NUM>% of the longitudinal diagonal length of the first mantle, but preferably not shorter than <NUM>%.

Preferably, the wall thickness of the first mantle and the second mantle is no greater than <NUM>.

Preferably, the first mantle on the inner side is fitted with tabs, either flat or rod-like, which increase the inner surface of the mantle.

Preferably, in the first mantle, on its inner side, cores are mounted, spaced vertically, being non-absorbent, but highly flexible, which are compensators for the pressure force of the cold accumulator in its phase transformation.

Preferably, in the first mantle, on its inner side, inserts are mounted, horizontally sliding, non-absorbable but strongly elastic, which are compensators for the evaporative force of the cold accumulator in its phase transformation, preferably their number is multiplied to at least two, and starting from the second one they preferably are distributed in the first mantle at distances from the upper base and the lower base in proportion, the first one preferably being fixed on the base of the lower spatial solid of the first mantle.

Preferably, the tank is a sealed pressure chamber, and it is equipped with at least one sealing insert, preferably also being a spacer insert.

Preferably, the sealing insert is connected to the spatial solids of the mantles of the first cold accumulators.

Preferably, the tank is made of thermally insulating material or is padded with thermally insulating material.

Preferably, the refrigerant is an aqueous glycol solution or brine or alcohol or a solution thereof.

Preferably, the first mantle is filled with water in an amount of no more than <NUM>% of the volume of the spatial solid of the first mantle.

Preferably, the first mantle is provided internally with ice micro-radicals, preferably freely movable, or stationary, in the first mantle and/or in the water filling thereof, the volume amount of the ice micro-radicals preferably not exceeding <NUM>% of the volume of the spatial solid of the mantle.

Preferably, up to <NUM> cold accumulators bounded by their own mantles are placed in a single tank, the first mantles of which are preferably embedded in the tank by means of inner spacer inserts and outer spacer inserts, which are elements fixing the position of the cold accumulators relative to the tank, and relative to each other.

A method of cooling the device for storage of energy according to the present invention, in particular cooling energy, in which device continuous thermal contact between the water being transformed into ice , i.e. for its liquid and solid states of aggregation, and the refrigerant supplying the cold, via a thermal conductor is maintained, and the transformation of water from its liquid state to its solid state of aggregation and vice versa is carried out in a cyclic mode, wherein one from water to ice when accumulating cold, and one from ice to water when discharging the cold, is based on the fact that ice is formed during accumulation first in the immediate vicinity of the thermal conductor, in the vicinity of which the refrigerant flows tangentially. Water in both its liquid and solid states of aggregation, constituting a cold accumulator bounded externally in each case by a first mantle made of a thermal conductor, is thermally contacted and held on the inside of each first mantle which is previously filled with it. When cooling the cold accumulator, once ice has been formed in the immediate vicinity of the first mantle, in the form of a ring similar in size, but with a smaller axial dimension in relation to the first mantle, it is further cooled down by producing ice axially towards the inside of the cold accumulator while at the same time producing successive layers of ice with successively smaller axial ring dimensions in relation to the axial size of the first mantle of the individual cold accumulator. The cold is supplied to the cold accumulators by washing over their first mantles from the outside with liquid refrigerant collected and flowing as a free stream through the tank. It is beneficial to force the circulation of this stream. At least one cold accumulator is cooled down in one tank, and the refrigerant is maintained in a liquid state of aggregation and at a temperature above its freezing point, preferably the refrigerant is maintained at a substantially constant temperature, but the temperature of the refrigerant is simultaneously maintained as being below <NUM>. The method is characterised in that the cold is additionally supplied to the cold accumulator by washing over the interior of at least one second mantle of the same cold accumulator with refrigerant by passing the refrigerant through this second mantle located inside the cold accumulator, whereby said refrigerant is supplied and said refrigerant is discharged from the exterior of the cold accumulator by means of a tubular inlet and a tubular outlet respectively, supplying the second mantle from the freezing thermal circuit.

Preferably, the ice is formed in the immediate vicinity of the second mantle, in the form of a ring similar in size but with a larger axial dimension relative to the second mantle, and it is subsequently cooled down by producing ice axially towards the outside of the cold accumulator while producing successive layers of ice with successively larger axial ring dimensions relative to the axial size of the second mantle of the individual cold accumulator.

Preferably, for every <NUM><NUM> of volume of all cold accumulators cooled in the tank, between <NUM><NUM> and <NUM><NUM> of refrigerant operating in the tank outside the first mantles of the cold accumulators, respectively, is used to cool them down.

Preferably, the temperature of the refrigerant is kept at a constant lower than -<NUM>, preferably lower than -<NUM>.

Preferably, the refrigerant is supplied to the tank and/or to the inside of the second mantle after cooling, preferably by pipes, with the supplied refrigerant being discharged through a supply pipe after cooling and the supplied refrigerant being discharged through a discharge pipe after use.

Preferably, the refrigerant is supplied to the tank and/or the inside of the second mantle during the cooling process, i.e. on an ongoing basis with simultaneous stream exchange.

Preferably, refrigerant cooling is carried out in an external, self-contained heat exchanger, operating for the purposes of the cooling process of the cold accumulators.

Preferably, the circulation of the liquid refrigerant is forced by a circulating pump and/or an impeller equipped with blades.

Preferably, the forcing of the liquid refrigerant through the tank and/or through the interior of the second mantle is carried out by a laminar flow, preferably at a later stage of the process.

Preferably, the forcing of the liquid refrigerant through the tank and/or through the interior of the second mantle is carried out by a turbulent flow, preferably at an early stage of the process.

Preferably, the stream washing over the first mantles of the cold accumulators flows through the tank along a serpentine path, using the spaces between the vertical baffles and/or the spaces between the horizontal baffles and/or the spaces between the inner inserts and/or the outer inserts and/or the openwork spaces.

Preferably, an aqueous solution of glycol or brine or alcohol or a solution thereof is used as a refrigerant.

Preferably, the first mantle on the inside and the second mantle on the outside are filled with water in an amount of no more than <NUM>% of the volume of the spatial solid of the first mantle.

Preferably, the freezing up of the ice during cold accumulation is carried out by means of ice micro-radicals, preferably freely moved and/or stationary in the first mantle and/or in the water filling thereof, using a volume amount of ice micro-radicals preferably not exceeding <NUM>% of the volume of the first mantle.

Preferably, up to <NUM> cold accumulators are used in a single tank, limiting them spatially on the outside by their own first mantles and on the inside by their own second mantles, their position relative to the tank and to each other being determined by embedding the first mantles in the tank through internal spacer inserts and external spacer inserts.

Preferably, between <NUM>,000kJ and <NUM>,<NUM>,000kJ of cooling energy is accumulated in all cold accumulators operating in a single tank.

Preferably, a pressure of between 1atm and 6atm is maintained in the tank and/or cold accumulators and/or inside the second mantle.

The application of the device for storage of energy, in particular cooling energy, with cyclic freeze-up, i.e. the generation and build-up of ice, wherein the device and/or the method shown above is used, is characterised in that during the cold accumulation, i.e. during the transformation of water into ice, the same device is used for discharging the cold, i.e. water is simultaneously obtained from the accumulated ice during the reverse transformation.

Preferably, cooled refrigerant with a temperature of less than <NUM> is used to supply the cold, and it is supplied to the outer environment of the first mantle, while previously used and now heated refrigerant with a temperature of more than <NUM> is used to recover the cold, and it is supplied to the inner environment of at least one of the second mantles.

Preferably, the first mantle is used to build up ice in the cold accumulator, and at least one second mantle is used to melt the ice.

Preferably, cooled refrigerant with a temperature of less than <NUM> is used to supply the cold, and it is supplied to the inner environment of at least one of the second mantles, while a previously used and now heated refrigerant with a temperature of more than <NUM> is used to recover cold, and is supplied to the outer environment of the first mantle.

Preferably, at least one second mantle is used to build up ice in the cold accumulator, and the first mantle is used to melt the ice.

Preferably, conducting the transformation in a cyclic mode, preferably daily, periodic intervals of simultaneous operation are used, during which the device is used in either standard process accelerator mode of accelerated full accumulation or accelerated full discharge, respectively, and during these periodic intervals a hybrid mode is used.

The advantages according to the inventions are as follows:.

An unexpected advantage of the solution according to the invention is also the possibility of using the same design of heat accumulation device with an appropriately selected refrigerant and a substance crystallising due to phase transformation, in which case the cycle can be carried out using accumulation and discharge temperatures other than those for the cold respectively.

After exemplary realisations of the solution according to the invention, it has been confirmed that the advantages of the invention make it possible to achieve an extremely high and reproducible, and rapidly realisable performance of the bed comprising cold accumulators, namely between <NUM>,<NUM> and <NUM>,<NUM> kJ/m<NUM> of such an accumulation bed.

The solution is illustrated in the manufacturing example, also in the drawing in which <FIG> depicts the device of the first manufacturing example from above and in profile along the long wall of the tank, in light cross-section of the walls revealing the contents of the tank, <FIG> shows the device of the second example made from above and in profile along the long wall of the tank, in light cross-section of the walls revealing the content of the tank, wherein only the main differences of the structure with respect to the first example are shown, without depicting the elements that have not been changed and might not be identifiable due to the multiplicity of mantles, <FIG> is a schematic representation of the refrigerant circuit of the structure of the third example and its particular use of the hybrid mode, together with the shown valves and their settings, through which the first and the second mantles are connected to the refrigerant circuit of the whole system, so that for the accumulation of ice in the cold accumulators the first mantles are used, and for the melting of the ice the second mantles are used, while <FIG> depicts schematically the refrigerant circuit for the structure of the third example and the particular use therein of the simultaneous mode, that is, for the mode of accelerator of standard processes, this time of accelerated full accumulation without the participation of the cooling energy receiver, together with the shown valves and their settings, through which the first mantles and the second mantles are connected to the refrigeration circuit of the whole system so that for the ice build-up in the cold accumulators both the first mantles and the second mantles are used at the same time, which is in accordance with the method of the first example described in more detail, and finally <FIG> depicts schematically the refrigerant circuit for the structure of the third example and the particular application therein of the simultaneous mode, i.e. for the standard process accelerator mode, this time of accelerated full discharge without the involvement of the chiller, together with the valves shown and their settings, through which the first and second mantles are connected to the refrigerant circuit of the entire system so that both the first mantles and the second mantles are used at the same time to melt the ice in the cold accumulators.

The exemplary device for storage of energy, in particular cooling energy, is equipped with the tank <NUM>, the circulating pump <NUM> and the heat exchanger <NUM> of which heat exchanger at least one cold accumulator <NUM> located in the tank <NUM> is a component. It is powered in terms of refrigeration by the cooling liquid refrigerant <NUM> which is a carrier of the cold. At least one cold accumulator <NUM> is placed in the tank <NUM>, this time there are precisely two of them, and each one is bounded by the mantle <NUM> in the form of a spatial solid made of a thermal conductor, which spatial solid is filled with water <NUM> and an air buffer supplementing up to <NUM>% of this filling. The mantles <NUM> of the multiplied cold accumulators <NUM> are inseparably and at a distance connected to the tank <NUM> and to each other, of which at a distance with respect to the walls <NUM> of the tank <NUM> and with respect to the adjacent mantles <NUM>, while directly with respect to the bottom <NUM> of the tank <NUM> this time by their lower bases, and the distance between the mantles <NUM> of the adjacent cold accumulators <NUM> ranges from <NUM> to <NUM>, this time <NUM>. The tank <NUM> is filled with liquid refrigerant <NUM> as a cold carrier, which refrigerant <NUM> forms the surroundings of all mantles <NUM> of the cold accumulators <NUM> located in the tank <NUM>. The mantles <NUM> are incompletely submerged in the liquid refrigerant <NUM>, this time the refrigerant <NUM> washes over them up to <NUM>% of their height, while the liquid refrigerant <NUM> simultaneously constitutes the freezing thermal circuit of the cold accumulators <NUM> bounded by their mantles <NUM>. The mantle <NUM> surrounding each cold accumulator <NUM> is the first mantle <NUM>' of that cold accumulator <NUM>, while inside the first mantle <NUM>', at a distance therefrom, but by means of the metal thermal bridges <NUM>, being this time and each time the bottom <NUM>' and the cap <NUM>" of the cold accumulator <NUM> to be formed, there is the second mantle <NUM>" of the same cold accumulator <NUM>, wherein the outer environment of the second mantle <NUM>" is the cold accumulator <NUM>, and the inner environment in the kind of filling of the second mantle <NUM>" is the refrigerant <NUM> supplied and discharged by the second mantle <NUM>" from the outside of the cold accumulator <NUM>, wherein the second mantle <NUM>" has a tubular input <NUM>' and has a tubular output <NUM>" connecting the second mantle <NUM>" to the freezing thermal circuit.

This time, the temperature of the refrigerant <NUM> is kept at a constant lower than -<NUM>, and more precisely at -<NUM>. The refrigerant <NUM> is supplied to the tank <NUM> and to the interior of the second mantle <NUM>" after cooling down, by means of pipes, whereby, after cooling down through the supply pipe <NUM>', and after use, the supplied refrigerant <NUM> is discharged through the discharge pipe <NUM>", where flow directions and temperature of the flowing refrigerant <NUM> depends on whether the device is currently operating in the accelerated accumulation mode, in the accelerated discharge mode or in the hybrid mode, which depends on the settings of the valves <NUM>. The refrigerant <NUM> is supplied, as mentioned above this time during accelerated cold accumulation, to the tank <NUM> and to the inside of the second mantle <NUM>" also during the cooling process, i.e. on an ongoing basis, with simultaneous stream exchange, and the cooling of the refrigerant <NUM> is carried out in an external, independent heat exchanger operating for the cooling process of the cold accumulators <NUM>. The circulation of the liquid refrigerant <NUM> is forced by the circulation pump <NUM> and the impeller <NUM> equipped with the blades <NUM>. The forcing of the liquid refrigerant <NUM> through the tank <NUM> and through the interior of the second mantle <NUM>" is carried out with a laminar flow, while this occurs at a later stage of the process, and at an early stage of the process the forcing of the liquid refrigerant <NUM> through the tank <NUM> and through the interior of the second mantle <NUM>" is carried out with a turbulent flow. The stream washing over the first mantles <NUM>' of the cold accumulators <NUM> flows through the tank <NUM> in a serpentine and simultaneously spiral path, using the spaces between the vertical baffles <NUM> and the spaces between the horizontal baffles <NUM> and the spaces between the inner inserts <NUM> and the outer inserts <NUM> and the openwork spaces. An aqueous glycol solution is used as the refrigerant <NUM>. The first mantle <NUM>' from the inside and the second mantle <NUM>" from the outside are filled with the water <NUM> to an amount of no more than <NUM>% of the volume of the spatial solid of the first mantle <NUM>', this time precisely <NUM>%. The freezing up of the ice <NUM>' during cold accumulation is carried out by means of micro-radicals <NUM> of the ice <NUM>' freely moved in the first mantle <NUM>' and in the water <NUM> filling thereof, using the volume amount of micro-radicals <NUM> of the ice <NUM>' preferably not exceeding <NUM>% of the volume of the first mantle <NUM>', this time <NUM>%. Up to <NUM> cold accumulators <NUM> are used in the single tank <NUM> limiting them spatially on the outside by their own first mantles <NUM>', and on the inside by the second mantles <NUM>", this time <NUM> each, their position relative to the tank <NUM> and to each other being determined by embedding the first coats <NUM>' in the tank <NUM> through the internal spacer inserts <NUM> and the external spacer inserts <NUM>, and the second mantles <NUM>" axially in the first mantles <NUM>'. Between <NUM>,000kJ and <NUM>,<NUM>,000kJ of cooling energy is accumulated in all cold accumulators <NUM> operating in the single tank <NUM>, but this time only <NUM>,600kJ.

The pressure in the tank <NUM> and in the cold accumulators <NUM> is maintained in the range from 1atm to 6atm, this time precisely corresponding to the atmospheric pressure.

An exemplary application of the device for storage of energy, in particular cooling energy, with cyclic freeze-up, i.e. the generation and build-up of the ice <NUM>', wherein the device and/or the method shown above is used, this time in detail described by cyclic accelerated cold accumulation mode, is that between cycles of accelerated cold accumulation, a hybrid mode is used, i.e. during the cold accumulation, i.e. during the transformation of the water <NUM> to form the ice <NUM>', the same device is used to discharge the cold, i.e. the water <NUM> is simultaneously obtained from the accumulated ice <NUM>' during the reverse transformation. The cooled refrigerant <NUM> with a temperature of less than <NUM> is used to supply the cold, and it is supplied to the outer environment of the first mantle <NUM>', while the previously used and now heated refrigerant <NUM> with a temperature of more than <NUM> is used to recover the cold, and it is supplied to the inner environment of the second mantle <NUM>". The first mantle <NUM>' is used to build up the ice <NUM>' in the cold accumulator <NUM>, and the second mantle <NUM>" is used to melt the ice <NUM>'. conducting the transformation in a cyclic, daily mode, periodic intervals of simultaneous operation are used, consisting in that the device is used in the standard process accelerator mode of accelerated full accumulation or accelerated full discharge, respectively. Between the successive simultaneous modes, therefore, a transitional, or hybrid, mode is used, given above as a specific application for the device described.

As in the first example with the following changes.

There are <NUM> cold accumulators <NUM> in the tank <NUM>, each of which is bounded by the first mantle <NUM>' from the outside and the second mantle <NUM>" from the inside, both in the form of a spatial solid made of a thermal conductor. The distance between the first mantles <NUM>' of the adjacent cold accumulators <NUM> ranges from <NUM> to <NUM>, this time <NUM>. For every <NUM><NUM> of volume of all the cold accumulators <NUM> cooled in the tank <NUM>, there is between <NUM><NUM> and <NUM><NUM> of the refrigerant <NUM>, this time <NUM><NUM>.

The circulating pump <NUM> is fixed outside the tank <NUM>, and has a connection through the circulation duct <NUM>, via the inlet pipe <NUM>' and the outlet pipe <NUM>", to the tank <NUM> via the inlet port <NUM>' of the tank <NUM> and the outlet port <NUM>" of the tank <NUM>, located at opposite ends of the wall <NUM> of the tank <NUM>, the same wall <NUM> of the tank <NUM>, with the inlet at the bottom above the bottom <NUM> of the tank <NUM> and the outlet at the top of the tank <NUM> above the cold accumulators <NUM>. The tank <NUM> is provided with a single horizontal baffle <NUM>, uninterruptedly attached by its edges, for at least <NUM>% of their full circumference, to the straight side walls <NUM> of the tank <NUM>, whereby if there were two horizontal baffles <NUM>, they would be placed in the tank <NUM> alternately, with an offset. The tank <NUM> is in the form of a prism with a regular polygon bottom, this time a regular hexagon, and the coaxial mantles <NUM>', <NUM>" in the shape of a spatial solid are in the form of a prism with a regular polygon bottom, also a hexagon. The spatial solids of the mantles <NUM>', <NUM>" are placed in the tank <NUM> relative to the bottom <NUM> of the tank <NUM> in an intermediate position, i.e. between the vertical and the horizontal position, the deviation from the vertical being no more than <NUM>° of angular measure, this time <NUM>° of angular measure to better force the spiral flow of the refrigerant <NUM> between the first mantles <NUM>'. The spatial solids of the first mantles <NUM>', in their cross-section, have a longest diagonal no longer than <NUM>, this time <NUM>. The spatial solids of the first mantles <NUM>', in their longitudinal cross-section, have a longest diagonal no longer than <NUM>, this time precisely <NUM>. The spatial solid of the second mantle <NUM>" in its cross-section has the longest diagonal no longer than <NUM>, but no longer than <NUM>% of the length of the diagonal of the first mantle, this time it has precisely <NUM>. The spatial solid of the second mantle <NUM>" in its longitudinal cross-section, usually has the longest diagonal no longer than <NUM>% of the length of the longitudinal diagonal of the first mantle <NUM>', preferably no shorter than <NUM>%, this time it is <NUM>. The first mantles <NUM>' on the inner side are fitted with <NUM> tabs, this time flat ones. The refrigerant <NUM> in the tank <NUM> is aqueous brine. The volume amount of micro-radicals <NUM> of the ice <NUM>' is <NUM>%.

An example of how to cool the device for storage of energy such that <NUM> cold accumulators <NUM> are cooled in one tank <NUM>, and for every <NUM><NUM> of volume of all cold accumulators <NUM> cooled in the tank <NUM>, between <NUM><NUM> and <NUM><NUM> of the refrigerant <NUM> operating in the tank <NUM> outside the first mantles <NUM>' of the cold accumulators <NUM>, this time precisely <NUM><NUM>, respectively, is used to cool them down.

This time, the temperature of the refrigerant <NUM> is maintained at a constant lower than -<NUM>, precisely at -<NUM>. The volume amount of the micro-radicals <NUM> of the ice <NUM>' preferably not exceeding <NUM>% of the volume of the first mantle <NUM>' is used, this time precisely <NUM>%. Between <NUM>,000kJ and <NUM>,<NUM>,000kJ of cooling energy is accumulated in all cold accumulators <NUM> operating in the single tank <NUM>, but this time only <NUM>,<NUM>,800kJ. The pressure in the tank <NUM> and in the cold accumulators <NUM> is maintained in the range from 1atm to 6atm, this time precisely corresponding to six times atmospheric pressure.

The exemplary application of the device for storage of energy, in particular cooling energy, with cyclic freeze-up, i.e. the generation and build-up of the ice <NUM>', wherein the device and/or the method shown above is used, that during the cold accumulation, i.e. during the transformation of the water <NUM> into the ice <NUM>', the same device is used for discharging the cold, i.e. the water <NUM> is simultaneously obtained from the accumulated ice <NUM>' during the reverse transformation. The cooled refrigerant <NUM> with a temperature of less than <NUM> is used to supply the cold, and it is supplied to the inner environment of the second mantle <NUM>", while the previously used and now heated refrigerant <NUM> with a temperature of more than <NUM> is used to recover the cold, and it is supplied to the outer environment of the first mantles <NUM>'. In the hybrid mode used here, therefore, the second mantle <NUM>" is used to build up ice in the cold accumulator <NUM>, and the first mantle <NUM>' is used to melt the ice. Conducting the transformation in a cyclic mode, periodic intervals of simultaneous operation are used, consisting in that the device is used in the standard process accelerator mode, of accelerated full accumulation or accelerated full discharge, respectively.

As in the first example with the following differences.

Claim 1:
A device for storage of energy, in particular cooling energy, equipped with a tank, preferably a circulating pump and a heat exchanger, said heat exchanger comprises at least one cold accumulator located in the tank, supplied in terms of refrigeration with a cold liquid refrigerant which is a carrier of the cold, wherein the refrigerant is an aqueous glycol solution or brine or alcohol or a solution thereof, wherein the tank comprises at least one cold accumulator, each bounded by a mantle in the form of a spatial solid made of a thermal conductor, which spatial solid is filled with water and an air or vacuum buffer supplementary up to <NUM>% of said filling, wherein the mantled of multiplied cold accumulators are preferably inseparably and at a distance connected to the tank and to each other, and the distance between the mantles of adjacent cold accumulators preferably ranges from <NUM> to <NUM>, wherein the tank is filled with the liquid refrigerant as a cold carrier, which refrigerant surrounds all the mantles of the cold accumulators in the tank, and at the same time the liquid refrigerant constitutes a freezing thermal circuit of the cold accumulators bounded by their mantles, characterised in that the mantle (<NUM>) surrounding the cold accumulator (<NUM>) is the first mantle (<NUM>') of this cold accumulator (<NUM>), while inside the first mantle (<NUM>'), at a distance therefrom, but preferably using a connection of at least one thermal bridge (<NUM>), there is at least one second mantle (<NUM>") of the same cold accumulator (<NUM>), the outer environment of the second mantle (<NUM>") being the cold accumulator (<NUM>), and the inner environment in the kind of filling of the second mantle (<NUM>") is the refrigerant (<NUM>) supplied and discharged by the second mantle (<NUM>") from the outside of the cold accumulator (<NUM>), wherein the second mantle (<NUM>") has a tubular input (<NUM>') and has a tubular output (<NUM>") connecting the second mantle (<NUM>") to the freezing thermal circuit.