| Theory of Heat And Refrigeration | |||||||||||||||||||||||||
| When the nice days of Spring time comes, ones thoughts turns to love. But when the hot days of Summer comes, ones thoughts turn to the Air Conditioner. | |||||||||||||||||||||||||
Pressure/Temperature Relationship Raising the pressure of a vapor raises its temperature; lowering the pressure decreases its temperature. 
In an air conditioning system, a compressor is used to increase the pressure of the refrigerant; this raises its temperature. The refrigerant vapor entering the condenser is hot. 
In all air conditioning systems, an expansion valve is used to lower the pressure of the refrigerant; the refrigerant in the evaporator is cold. Automotive A/C Systems are designed to operate at pressures that keep the refrigerant at the optimum temperature for taking heat out of the passenger compartment. |
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Additional information provided courtesy of ALLDATA
© 2003 - 2004 Vincent T. Ciulla
