A heat pump with refrigerant-134a as the working fluid is used to keep a space at 25 C by absorbing heat from geothermal water that enters the evaporator at 60 C at a rate of 0.065 kg/s and leaves at 40 C. Refrigerant enters the evaporator at 12 C with a quality of 15 percent and leaves at the same pressure as saturated vapor. If the compressor consumes 1.6 kW of power, determine; (a) the mass flow rate of the refrigerant, (b) the rate of heat supply, (C) the COP, and (d) the minimum power input to the compressor for the same rate of heat supply.

A heat pump with refrigerant-134a as the working fluid is used to keep a space at 25 C by absorbing heat from geothermal water that enters the evaporator at 60 C at a rate of 0.065 kg/s and leaves at 40 C. Refrigerant enters the evaporator at 12 C with a quality of 15 percent and leaves at the same pressure as saturated vapor. If the compressor consumes 1.6 kW of power, determine; (a) the mass flow rate of the refrigerant, (b) the rate of heat supply, (C) the COP, and (d) the minimum power input to the compressor for the same rate of heat supply.

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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