A:- A commercial refrigerator with refrigerant-134a as shown in Fig. Q3A as the working fluid is used to keep the refrigerated space at -35 °C by rejecting waste heat to cooling water that enters the condenser at 18 °C at a rate of 0.25 kg/s and leaves at 26 °C. The refrigerante enters the condenser at 1.2 MPa and 50 °C and leaves at the same pressure subcooled by 5 °C. If the compressor consumes 3.3 kW of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, and (c) the COP. 1:2 MPa 5°C subcooled Expansion valve Fig. Q3A Condenser Evaporator Water 18% 1.2 MP 50PC Compressor

A:- A commercial refrigerator with refrigerant-134a as shown in Fig. Q3A as the working fluid is used to keep the refrigerated space at -35 °C by rejecting waste heat to cooling water that enters the condenser at 18 °C at a rate of 0.25 kg/s and leaves at 26 °C. The refrigerante enters the condenser at 1.2 MPa and 50 °C and leaves at the same pressure subcooled by 5 °C. If the compressor consumes 3.3 kW of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, and (c) the COP. 1:2 MPa 5°C subcooled Expansion valve Fig. Q3A Condenser Evaporator Water 18% 1.2 MP 50PC Compressor

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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