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Refrigerator coil frosting: effect on performance and energy use What is the impact of frost formation on cooling coils inside a refrigerator on heat transfer and power consumption? Choose the correct effect.

Difficulty: Easy

Correct Answer: It increases power consumption

Explanation:

Concept/Approach
Frost acts as an insulating layer (low thermal conductivity), increasing the overall thermal resistance between the coil and air.


Implications
For the same cooling load, the compressor must run longer (or at higher duty), raising energy consumption; COP effectively degrades.


Final Answer
It increases power consumption.

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