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Answer: A geothermal heat pump operating at steady state

Fundamentals of Engineering Thermodynamics | 7th Edition | ISBN: 9780470495902 | Authors: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey ISBN: 9780470495902 50

Solution for problem 42P Chapter 10

Fundamentals of Engineering Thermodynamics | 7th Edition

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Fundamentals of Engineering Thermodynamics | 7th Edition | ISBN: 9780470495902 | Authors: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey

Fundamentals of Engineering Thermodynamics | 7th Edition

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Problem 42P

PROBLEM 42P

A geothermal heat pump operating at steady state with Refrigerant-22 as the working fluid is shown schematically in Fig. P10.42. The heat pump uses 55°F water from wells as the thermal source. Operating data are shown on the figure for a day in which the outside air temperature is 20°F. Assume adiabatic operation of the compressor. For the heat pump, determine

(a) the volumetric flow rate of heated air to the house, in ft3/min.

(b) the isentropic compressor efficiency.

(c) the compressor power, in horsepower.

(d) the coefficient of performance.

(e) the volumetric flow rate of water from the geothermal wells, in gal/min.

For T0 = 20°F, perform a full exergy accounting of the compressor power input, and devise and evaluate a second law efficiency for the heat pump system.

Fig. P10.42

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Textbook: Fundamentals of Engineering Thermodynamics
Edition: 7
Author: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey
ISBN: 9780470495902

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Answer: A geothermal heat pump operating at steady state