| 摘要 |
Apparatus for cooling heating air comprises an evaporator 1, a condenser 2, and a low pressure difference heat-pump 15. A working substance pair (i.e. working fluid of the apparatus) comprises a refrigerant and an absorbent. In the evaporator one substance of the pair is evaporated to provide a gas/concentrated liquid phase. This is accomplished by heat exchange with atmospheric air which is cooled for supply to a room. The pressure of gas/liquid phase is increased by pump 15 and is supplied to condenser for return to a dilute solution of the working substance pair by heat exchange with air exhausted from the room. The condenser has a film evaporation surface (6, Figure 5). Throttle 17 expands the dilute solution of the working substance pair before return to the evaporator. Pump 15 may comprise a liquid pump and a vapour pump. In the T-S diagram for the apparatus the heat-absorbing arc and heat-releasing arcs intersect at point J (see figure 1). <IMAGE> |
