The Ideal Vapor-Compression Refrigeration Cycle

Most compressors do not work well on two-phase mixtures.
Solution:
Completely vaporize the refrigerant in the evaporator.
Turbines are not designed to handle vapor liquid mixtures.
Solution:
Replace the turbine with an expansion valve.
Process flow diagram for a practical, basic vapor-compression refrigeration cycle.

Ideal Vapor-Compression Refrigeration Cycle

Evaporator:
Compressor:
Condenser:
Expansion
Valve
:
Heat absorbed at constant pressure. Effluent is a saturated vapor.
Isentropic compression.
Heat rejected at constant pressure.

Isenthalpic

expansion.
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Ch 10, Lesson B, Page 2 - The Ideal Vapor-Compression Refrigeration Cycle