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Unformatted text preview: an isentropic turbine. Determine the new rate of heat transfer in kW from the cold temperature region. Determine the corresponding increase in the COP of the refrigerator. Note: You do not need to reproduce the solution of Example 10.1 found in the textbook, but you must follow the problem solving format and state what information you are using from the solution found in the textbook. SP37: A house is maintained at 75°F in the winter by a heat pump. The house is losing heat at a rate of 60,000 Btu/h through the walls and roof. The heat pump operates on an ideal vapor-compression cycle and uses underground water at 50°F as the heat source. The working fluid is refrigerant-134a. The evaporator and condenser pressures are 50 and 120 psia, respectively. Determine the power input in horsepower to the heat pump and the electric power saved in horsepower by using a heat pump instead of an electric resistance heater....
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This note was uploaded on 04/23/2011 for the course ME 200 taught by Professor Gal during the Spring '08 term at Purdue University-West Lafayette.
- Spring '08