Refrigerant 134a is the working fluid in a vapor-compression heat pump system with a heating capacity of 60,000 Btu/h. The condenser operates at 300 lbf/in², and the evaporator temperature is -10°F. The refrigerant is a saturated vapor at the evaporator exit and a liquid at 120°F at the condenser exit. Pressure drops in the flows through the evaporator and condenser are negligible. The compression process is adiabatic, and the temperature at the compressor exit is 200°F. 4

Refrigerant 134a is the working fluid in a vapor-compression heat pump system with a heating capacity of 60,000 Btu/h. The condenser operates at 300 lbf/in², and the evaporator temperature is -10°F. The refrigerant is a saturated vapor at the evaporator exit and a liquid at 120°F at the condenser exit. Pressure drops in the flows through the evaporator and condenser are negligible. The compression process is adiabatic, and the temperature at the compressor exit is 200°F. 4

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

Chapter3: Refrigeration And Refrigerants

Section: Chapter Questions

Problem 12RQ: The condensing pressure is 260 psig and the condenser outlet temperature is 108F for R-22. By how...

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Refrigerant 134a is the working fluid in a vapor-compression heat pump system with a heatingcapacity of 65,000 Btu/h. The condenser operates at 300 lbf/in , and the evaporator temperatureis -10°F. The refrigerant is a saturated vapor at the evaporator exit and a liquid at 120°F at thecondenser exit. Pressure drops in the flows through the evaporator and condenser are negligible.The compression process is adiabatic, and the temperature at the compressor exit is 200°F A) Determine the mass flow rate of refrigerant in lb/min B) Determine the required horsepower of the compressor. C) Determine the coefficient of performance.