1.2 A reversible heat pump is used to maintain a temperature of 0°C in a refrigerator when it rejects tne heat to the surrounding at 25°C. (i) If the heat removal rate from the refrigerator is 1440 kJ/min, determine the COP of the machine and work input required. (ii) If the required input to run the pump is developed by a reversible engine which received heat at 380°C and rejects heat to atmosphere, then determine the overall COP of the system.

1.2 A reversible heat pump is used to maintain a temperature of 0°C in a refrigerator when it rejects tne heat to the surrounding at 25°C. (i) If the heat removal rate from the refrigerator is 1440 kJ/min, determine the COP of the machine and work input required. (ii) If the required input to run the pump is developed by a reversible engine which received heat at 380°C and rejects heat to atmosphere, then determine the overall COP of the system.

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 12RQ: Refrigerators currently being manufactured in the United States are using______as their refrigerant.

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