Refrigerant-134a enters the evaporator of a residential heat pump with a quality of 0.21 and pressure of 140 kPa and exits as a superheated vapor at -10°C and 140 kPa. Condenser pressure of the cycle is 900 kPa. If the isentropic efficiency of the compressor is 82%, calculate the COP of the heat pump.

Refrigerant-134a enters the evaporator of a residential heat pump with a quality of 0.21 and pressure of 140 kPa and exits as a superheated vapor at -10°C and 140 kPa. Condenser pressure of the cycle is 900 kPa. If the isentropic efficiency of the compressor is 82%, calculate the COP of the heat pump.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 13RQ: Condensers in these refrigerators are all_______cooled.

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