Filter
Top Products
12 TRG-TRC011-EN
notes
period one
Absorption Refrigeration Cycle
As the high-pressure liquid refrigerant flows through the expansion device, it
causes a pressure drop that reduces the refrigerant pressure to that of the
evaporator. This pressure reduction causes a small portion of the liquid
refrigerant to boil off, or “flash,” cooling the remaining refrigerant to the
desired evaporator temperature. The cooled mixture of liquid and vapor
refrigerant then flows into the evaporator pan.
Inside the evaporator, relatively warm return water from the chilled-water
system flows through the tubes. An evaporator pump draws the liquid
refrigerant from the bottom of the evaporator and continuously circulates it to
be sprayed over the tube surfaces. This maximizes heat transfer.
As heat transfers from the water to the cooler liquid refrigerant, the refrigerant
boils (vaporizes) and the resulting refrigerant vapor is drawn into the lower-
pressure absorber. Physically, the evaporator and absorber are contained inside
the same shell.
chilled
chilled
water
water
evaporator
evaporator
spray pump
spray pump
refrigerant
refrigerant
vapor
vapor
liquid
liquid
refrigerant
refrigerant
absorber
absorber
evaporator
evaporator
Figure 15