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Which consequence maximizes chiller efficiency at constant load?

A)Evaporator pressure at saturation point
B)Compressor motor draws peak amperage
C)Expansion valve remains fully closed
D)Condenser superheat rises asymptotically

💡 Explanation

Chiller efficiency improves with higher evaporator pressures because elevated pressure corresponds to a higher saturation temperature—less temperature lift needed therefore, lower compressor work due to decreased entropy generation, rather than amperage spikes or ineffective valve closures.

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