TRG-TRC003-EN 23
period three
Refrigeration Cycle
notes
At the inlet to the evaporator, the refrigerant exists as a cool, low-pressure
mixture of liquid and vapor. In this example, the evaporator is a finned-tube coil
used to cool air. Other types of evaporators are used to cool water.
The relatively warm air flows across this finned-tube arrangement and the cold
refrigerant flows through the tubes. The refrigerant enters the evaporator ($)
and absorbs heat from the warmer air, causing the liquid refrigerant to boil. The
resulting refrigerant vapor (%) is drawn to the compressor.
The compressor raises the pressure of the refrigerant vapor (%) to a pressure
and temperature high enough (&) so that it can reject heat to another fluid, such
as ambient air or water. There are several types of compressors. The type
shown in this figure is a reciprocating compressor.
This hot, high-pressure refrigerant vapor then travels to the condenser.
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