GB422150A - Improvements relating to heat converters comprising absorption apparatus - Google Patents

Abstract

422,150. Refrigerating and heating. SIEMENS - SCHUCKERTWERKE AKT.-GES., Siemensstadt, Berlin. Dec. 21, 1933, No. 35975. Convention date, Dec. 21, 1932. [Class 29] Absorption systems.-Apparatus operating on the principle of continuous cycle or reversing absorption refrigerating systems is adapted for abstraction or emission of heat in at least four distinct temperature ranges, as distinguished from the usual three ranges of the generator, the condenser or absorber, and the evaporator or low temperature generator. The heat given out may be employed to generate steam for turbines, or for general heating purposes, while heat may be abstracted from refrigerating chambers. Apparatus comprising two linked reversing systems out of phase is shown in Fig. 1, in which generatorabsorber vessels KA<1>, KA<2> receive heat alternately from a furnace 1 at a temperature T<8>, through closed heat-transfer systems 2, 3, 4, with reversing valves 5, 6. The associated condenser-evaporator vessels CV<1>, CV<2>, transmit heat of condensation through closed transfer systems 26, 25, 28 to a coil &c., 31 at a temperature T<1>, and heat of evaporation is supplied to them from a refrigerator 21 at a temperature T<0> through transfer systems 22, 20, 19. The heat of absorption of the generator-absorber vessels is transferred through systems 10, 9, 8, to a steam generator 7 at a temperature T<2>, the steam being delivered to a turbine 14, and condensed at 16, whence the condensate is returned by a pump 18. Refrigeration is produced at a somewhat higher temperature than with the usual systems, external work is performed by the turbine, and useful heat is given out to the coil, &c., 31. Water may be used in the high temperature transfer system and sulphurous acid or ammonia in the low temperature system. Solid absorbents, such as strontium bromide, which combine with the refrigerant may be employed in the reversing systems. The method may be applied to non-condensing reversing systems. Continuous-cycle systems of the condensing or reabsorption types may be employed, with water or ammonia as refrigerant and caustic soda, potash, or zinc chloride as absorbents. A system with six temperature ranges, T<0>-T<5>, Fig. 5, includes a generator 301 supplying vapour to a condenser 308 and to a reabsorber 306, an evaporator 311, a low-temperature generator 317 and an absorber 316. Heat of absorption in the absorber and reabsorber is used to generate steam in vessels 318, 319 for stage turbines M<3>-M<5>, the exhaust steam being condensed in vessels 328, 331 cooled respectively by a heat transfer system 341 from the low-temperature generator 317 and by an external source 332. Liquor and condensate pumps P<8>-P<12> and control valves V<21>-V<29> are provided. The relative amounts of refrigeration and power produced depend on the proportions of vapour from the generator delivered to the reabsorber 306, and to the condenser 308, and it is stated that varied thermal effects may be produced by varying these proportions.