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Thermodynamics: We find the cop of refrigerator and not efficiency. Why?
I have a question about thermodynamics. Why do we use the coefficient of performance (COP) of a refrigerator instead of its efficiency?
Good question! The COP is actually a more useful measure for refrigerators because it compares the amount of energy the refrigerator removes from its compartment to the amount of energy it consumes. Efficiency, on the other hand, compares the work done by the refrigerator to the energy it consumes. So the COP gives us a more direct measure of how well the refrigerator is doing its job.