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Which outcome occurs when a refrigeration system using ammonia experiences rapid pressure reduction during throttling?

A)Ammonia evaporator flash vapor increases
B)Compressor cooling efficiency rapidly increases
C)System superheat significantly decreases
D)Refrigerant subcooling dramatically improves

💡 Explanation

Flash vaporization increases because it relies on the Joule-Thomson effect; a sudden pressure drop causes some liquid refrigerant to vaporize. Therefore, the evaporator receives more vapor, which reduces the cooling capacity, rather than enhancing it; this limits system performance.

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