A Carnot vapor refrigeration cycle is used to maintain a cold region at 0°F where the ambient temperature is 75 °F. Refrigerant R-134a enters the condenser as saturated vapor at 100 psi and leaves as saturated liquid at the same pressure. The evaporator pressure is 20 psi. The mass flow rate of refrigerant is 12 lbm/s. Calculate (a) the compressor work Btu/min (b) turbine power, in Btu/min and (b) the coefficient of performance.

A Carnot vapor refrigeration cycle is used to maintain a cold region at 0°F where the ambient temperature is 75 °F. Refrigerant R-134a enters the condenser as saturated vapor at 100 psi and leaves as saturated liquid at the same pressure. The evaporator pressure is 20 psi. The mass flow rate of refrigerant is 12 lbm/s. Calculate (a) the compressor work Btu/min (b) turbine power, in Btu/min and (b) the coefficient of performance.

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

Chapter22: Condensers

Section: Chapter Questions

Problem 7RQ: When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be...

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