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← TechnologyWhich outcome inevitably reduces the coefficient of performance (COP) in a refrigeration heat pump system that accumulates frost?
A)Evaporator coil heat transfer decreases✓
B)Compressor motor draws less power
C)Refrigerant condenses at lower pressure
D)Expansion valve efficiently increases heat
💡 Explanation
Decreased heat transfer occurs because the frost acts as an insulator, increasing thermal resistance to the evaporator coil's ability to absorb environmental heat. Therefore, the amount of heat absorbed is less, rather than if there were optimal, frost-free conditions.
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