A heat pump maintains a dwelling at 68°F. When operating steadily, the power input 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 $0.18 per kWh, determine the cost of electricity in a m

A heat pump maintains a dwelling at 68°F. When operating steadily, the power input 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 $0.18 per kWh, determine the cost of electricity in a m

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.46P

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Question

10. thermodynamics

A heat pump maintains a dwelling at 68°F. When operating steadily, the power input to the heat pump is 7 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 $0.18 per kWh, determine the cost of electricity in a month when the heat pump operates for 300 hours.
Part A
Determine the coefficient of performance.
y =
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Science that deals with the amount of energy transferred from one equilibrium state to another equilibrium state.

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