Patent GB-317052-A (GB)
Title: Improvements in or relating to absorption machines for refrigerating or heating
IPC: F25B15/10
Filed: 1929-08-06
Abstract: 317,052. Siemens - Schuckertwerke Akt.-Ges. Aug. 9, 1928, [Convention date]. Refrigerating, absorbtion systems for. - In continuous-cycle systems containing a neutral gas, a chamber in which the refrigerant changes its state is arranged in heat exchange with another chamber wherein the refrigerant is generated from solution into the neutral gas. The first change may also be in the presence of neutral gas. The invention is described as applied to systems wherein cold is produced by evolution from solution, and also to condensation-evaporation systems. Further, it is stated that it may be employed in systems where heat at moderate temperature given out on absorption is utilized for external heating purposes. Where the system is applied to a cold-storage chamber, the element at the lowest temperature may be placed in an insulated compartment for ice-making or other low-temperature cooling, while the chamber proper may be maintained at a moderate temperature by surplus cold from an element taking part in the heat-exchange of the system. In the non- condensing system shown in Fig. 1, refrigerant gas and weak solution are raised from a heated generator 1 to a separator 4, whence the liquor flows through a pipe 5 to an absorber 6, which supplies the generator with strong liquor. The gas passes from the separator through a pipe 8 to a pipe 13, 9 where it lifts solution to a cooled reabsorber 10, from which the enriched solution passes to a chamber 12 forming a medium-temperature generator. This exchanges heat with a coil 17 forming a reabsorber for the part of the system including the low temperature generator or refrigerator proper 20. Gas not absorbed in the vessel 10 passes through a pipe 14 to the pipe 16 conveying poor solution from the refrigerator to the reabsorber 17, whence liquor flows back through a pipe 19 to the refrigerator and gas flows to a nozzle 21 inducing a circulation in the inert gas system 22, 23, 24 connecting the absorber, the generator 12, and the refrigerator. The various liquor pipes are arranged to exchange heat. The vapour unabsorbed in the absorber 10 may be condensed and then evaporated into neutral gas in an evaporator forming part of the gas mixture circuit. In another non-condensing system described, a medium-temperature generator and an absorber of the system, each containing inert gas, are juxtaposed so as to exchange heat, and in a further system separate inert gas circuits connect the absorbers, reabsorbers and generators at different partial pressures. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the following :-In a condensation-evaporation system shown in Fig. 2 (Cancelled), gas and liquid rise from a heated generator 31 to a separator 34, from which the gas passes through a rectifier 38 to an air-cooled condenser 40 and thence to an evaporator 41. Liquor flows from the separator through a pipe 35 to an absorber vessel 36, where heat is given up to a coil 49 supplied with solution from an absorber 45 and constituting a generator. The absorber 36 feeds the heated generator 31 while gas and liquor flow from the generator coil 49 to the rectifier 38, which supplies liquor to the absorber 45. Part of this liquor enters a vessel 50 and by the heat from the gas pipe 35 supplies inducing gas for a nozzle 51 in the inert gas circuit 43, 47, 46 connecting the evaporator with the absorbers. The condensed-gas pipe 42 is cooled by counterflow heat exchange within the gas mixture pipe 43 from the evaporator. This subject-matter does not appear in the Specification as accepted.