A heat pump maintains a dwelling at 68°F. When operating steadily, the power input to the heat pump is 3 hp, and the heat pump receives energy by heat transfer from 55°F well water at a rate of 500 Btu/min.

Physics for Scientists and Engineers with Modern Physics
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Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter21: Heat Engines, Entropy, And The Second Law Of Thermodynamics
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A heat pump maintains a dwelling at 68°F. When operating steadily, the power input to the heat pump is 3 hp, and the heat pump
receives energy by heat transfer from 55°F well water at a rate of 500 Btu/min.
(a) Determine the coefficient of performance.
(b) Evaluating electricity at $0.08 per kWh, determine the cost of electricity in a month when the heat pump operates for 300 hours.
* Your answer is incorrect.
Determine the coefficient of performance.
y = i 82.25
Transcribed Image Text:A heat pump maintains a dwelling at 68°F. When operating steadily, the power input to the heat pump is 3 hp, and the heat pump receives energy by heat transfer from 55°F well water at a rate of 500 Btu/min. (a) Determine the coefficient of performance. (b) Evaluating electricity at $0.08 per kWh, determine the cost of electricity in a month when the heat pump operates for 300 hours. * Your answer is incorrect. Determine the coefficient of performance. y = i 82.25
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