Coefficient of performance (COP) for a cooling machine is classically which ratio?
Choices
- (A) Cooling effect (refrigeration capacity) / compressor work input (same energy units)
- (B) Work / cooling (inverse COP)
- (C) Heating / fan power
- (D) Mass flow of refrigerant only
Correct answer: (A)
Cooling effect (refrigeration capacity) / compressor work input (same energy units)
Explanation
COP_cool = Q_L / W_in (per thermodynamics and ASHRAE).