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← ScienceWhich consequence results when rapid depressurization causes a liquid refrigerant to undergo a flash evaporation?
A)System efficiency irreversibly decreases✓
B)Compressor motor winding overheats
C)Lubricant oil viscosity increases
D)Internal valve spring preload weakens
💡 Explanation
System efficiency decreases because the flash evaporation creates vapor within the throttling valve; this is an isenthalpic expansion which increases disorder, reducing available work and system efficiency. Therefore efficiency suffers, rather than causing motor burnout under normal conditions.
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