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Question
An ideal refrigerator keeps its content at 0°C while the room temperature is 27°C. Calculate its coefficient of performance.
Numerical
Solution
Content placed at temperature TL = 0°C = 0 + 273
TL = 273 K
Refrigerator placed at temperature TH = 27°C = 27 + 273 = 300 K
Coefficient of performance (β) = `"T"_"L"/("T"_"H" - "T"_"L")`
= `273/(300 - 373)`
= `273/27`
β = 10.11
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