Which outcome occurs from oil accumulation on the evaporator coil during heat pump operation?

💡 Explanation

When oil accumulates on the evaporator coil, it acts as an insulating layer because oil has lower thermal conductivity than the coil material, reducing heat transfer efficiency. Therefore, reduced heat transfer results, rather than increased temp, subcooling, or efficiency, which would require an unimpeded heat transfer surface.

• Which outcome results when diesel fuel injectors experience excessive 'needle bounce' during injection?
• Which outcome is amplified when diesel engine fuel injectors deliver excessive fuel quantity?
• Which consequence results when thermally-induced bending stress is concentrated near crankshaft fillets?
• Which risk increases when an engine's detonation frequency surpasses pre-ignition thresholds?
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• Which outcome occurs when excessive preheating induces grain growth during die forging of a steel alloy?