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4 TRG-TRC005-EN
notes
period one
Refrigeration Cycle
Finally, the high-pressure liquid refrigerant (D) flows through the expansion
device, causing a large pressure drop that reduces the pressure of the
refrigerant to that of the evaporator. This pressure reduction causes a small
portion of the liquid to boil off, or flash, cooling the remaining refrigerant to the
desired evaporator temperature.
The cooled mixture of liquid and vapor refrigerant then enters the evaporator
(A) to repeat the cycle.
expansion
expansion
device
device
A
D
condenser
condenser
pressure
pressure
enthalpy
enthalpy
evaporator
evaporator
Refrigeration Cycle
B
C
compressor
compressor
Figure 7