Explanation Write the formula to calculate coefficient of performance of reversible refrigerator ( COP R,rev ) . COP R,rev = 1 ( T H T L − 1 ) (I) Here, absolute temperature of high and low temperature reservoir is T H and T L respectively. Write the formula to calculate coefficient of performance of a refrigerator ( COP R ) . COP R = Q ˙ L W ˙ net,in (II) Here, amount of heat rejected rate from refrigerator is Q ˙ L and required power input to reversible refrigerator is W ˙ net,in Conclusion: Convert the unit of temperature T L from ° F to R . T L = 72 ° F = ( 72 + 460 ) R = 532 R Convert the unit of temperature T H from ° F to R . T H = 90 ° F = ( 90 + 460 ) R = 550 R Substitute 532 R for T L and 550 R for T H in Equation (I)

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ISBN: 8220102809444

Author: CENGEL

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Chapter 6.11, Problem 99P

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The maximum heat removal rate from the house.

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Chapter 6.11, Problem 98P

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