Out of the following refrigeration cycles, which one has maximum COP ?
Correct answer: D. Carnot cycle
- A. Air cycle
- B. Vapor compression with a reversible expansion engine
- C. Ordinary vapor compression cycle
- D. Carnot cycle
Explanation
The Carnot refrigerator has the maximum possible COP for specified evaporator and condenser temperatures because both heat-transfer and expansion processes are reversible. Real air and vapour-compression cycles have irreversibilities that lower their COP.
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