Trane TRG-TRC011-EN manual Refrigerant then flows into the evaporator pan

period one

Absorption Refrigeration Cycle

notes	causes a pressure drop that reduces the refrigerant pressure to that of the
	As the high-pressure liquid refrigerant flows through the expansion device, it
	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.

refrigerant
vapor
evaporator			chilled
			water
			liquid
	absorber		refrigerant
		evaporator
		spray pump		Figure 15

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.

12 TRG-TRC011-EN