A refrigerator uses refrigerant-134a as the workingfluid and operates on the ideal vapor-compression refrigerationcycle except for the compression process. The refrigerantenters the evaporator at 120 kPa with a quality of 34 percentand leaves the compressor at 70C. If the compressor consumes450 W of power, determine (a) the mass flow rate of therefrigerant, (b) the condenser pressure, and (c) the COP of therefrigerator.

A refrigerator uses refrigerant-134a as the workingfluid and operates on the ideal vapor-compression refrigerationcycle except for the compression process. The refrigerantenters the evaporator at 120 kPa with a quality of 34 percentand leaves the compressor at 70C. If the compressor consumes450 W of power, determine (a) the mass flow rate of therefrigerant, (b) the condenser pressure, and (c) the COP of therefrigerator.

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter11: Energy In Thermal Processes

Section: Chapter Questions

Problem 36P: The excess internal energy of metabolism is exhausted through a variety of channels, such as through...

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Question

A refrigerator uses refrigerant-134a as the working
fluid and operates on the ideal vapor-compression refrigeration
cycle except for the compression process. The refrigerant
enters the evaporator at 120 kPa with a quality of 34 percent
and leaves the compressor at 70C. If the compressor consumes
450 W of power, determine (a) the mass flow rate of the
refrigerant, (b) the condenser pressure, and (c) the COP of the
refrigerator.

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