24 TRG-TRC003-EN
notes
period three
Refrigeration Cycle
The condenser is a heat exchanger used to reject the heat of the refrigerant to
another medium. The example shown is an air-cooled condenser that rejects
heat to the ambient air. Other types of condensers are used to reject heat to
water.
The hot, high-pressure refrigerant vapor (&) flows through the tubes of this
condenser and rejects heat from the cooler ambient air that passes through the
condenser coil. As the heat content of the refrigerant vapor is reduced, it
condenses into liquid (').
From the condenser, the high-pressure liquid refrigerant travels to the
expansion device.
The primary purpose of the expansion device is to drop the pressure of the
liquid refrigerant to equal the pressure in the evaporator. Several types of
expansion devices can be used. The device shown is an expansion valve.
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Figure 38