GB1368869A - Absorption machine - Google Patents

Abstract

1368869 Absorption refrigeration machines TRANE CO 22 Sept 1972 [24 Sept 1971] 44059/72 Heading F4H An absorption refrigeration machine comprises a first effect generator 10, a second effect generator 13, an evaporator 32, an absorber 27 and a condenser 21, and means whereby the machine may be used solely for cooling, or for heating and cooling simultaneously, or for heating alone. In operation as a refrigeration unit, valve 53 connecting the vapour passage between an auxiliary chamber 16 and the evaporator 32 is closed, and no flow of water is allowed through heat exchanger 18. Dilute solution is fed into the first effect generator 10 through conduit 48. The heat from boiler tube 11 causes the refrigerant in the solution to boil off and the vapour passes via passage 15, the partially concentrated solution being drawn off through conduit 49, heat exchanger 47, conduit 50 into the second effect generator 13. Vapour from conduit 15 passes into chamber 16, conduit 17 and into heat exchange coil 14. The heat from the coil 14 causes further boiling and thus concentrating of the solution. The vapour phase passes through eliminators 23 into the condenser 21, to be condensed by the cooling fluid in coil 24. The liquid is drawn off to the evaporator pump 29. The concentrated solution is removed from generator 13, and passes through heat exchanger 43 to the absorber pump 38. In the evaporator, refrigerant from-pump 29 pasess through spray headers 31 to cool water for a building air conditioning system in heat exchanger 33. For simultaneous heating purposes, water for heating the rooms may pass through the heat exchange coil 18 provided in chamber 16. When the refrigeration machine is required entirely for heating purposes, solenoid 58 is activated to open valve 53. At the same time, the flow of cooling water through heat exchange coils 26 and 24 is ceased. Due to an equalizing of pressure in the second effect generator 13 and condenser 21, vapour ceases to flow through coil 14, all of the vapour produced in generator 10 passes via chamber 16 into the evaporator 32. Heat transfer takes place with the coil 33 thereby providing heated fluid for the building. Condensed vapour falls into the absorber 27 and mixes with the absorbent solution being sprayed from headers 36 to form dilute solution; which passes via conduit 39 back to generator pump 40 to be delivered back to the first effect generator 10. Concentrated solution produced in generator 10 passes through heat exchanger 47 into generator 13, and then via conduit 51, heat exchanger 43 to absorber pump 42 for delivery to the spray headers 36.