A refrigerator using R-22 is powered by a small natural gas fired heat engine with a thermal

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A refrigerator using R-22 is powered by a small natural gas fired heat engine with a thermal efficiency of 25%. The R-22 condenses at 40C and it evaporates at-20C and the cycle is standard. Find the two specific heat transfers in the refrigeration cycle. What is the overall coefficient of performance as QL/Q1?
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