A vapor-compression refrigeration system uses ammonia as the working fluid. Data for the cycle are provided in the table below. The principal states are numbered as in the diagram below. The heat transfer rate from the working fluid passing through the condenser is 50,000 Btu/h. State 1 2 3 4 Expansion valve wwwwww Condenser If the compressor operates adiabatically, determine: (a) the compressor power input, in hp. (b) the coefficient of performance of the cycle. out Evaporator www 30 р Th S (lb/in.2) (°F) (Btu/lb) (Btu/lb.*R) Compressor 250 30 250 340 10 616.7 Saturated or superheated vapor 100 --- 784.3 154.9 154.9 1.347 1.378

A vapor-compression refrigeration system uses ammonia as the working fluid. Data for the cycle are provided in the table below. The principal states are numbered as in the diagram below. The heat transfer rate from the working fluid passing through the condenser is 50,000 Btu/h. State 1 2 3 4 Expansion valve wwwwww Condenser If the compressor operates adiabatically, determine: (a) the compressor power input, in hp. (b) the coefficient of performance of the cycle. out Evaporator www 30 р Th S (lb/in.2) (°F) (Btu/lb) (Btu/lb.*R) Compressor 250 30 250 340 10 616.7 Saturated or superheated vapor 100 --- 784.3 154.9 154.9 1.347 1.378

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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When a standard-efficiency air-cooled condenser is used, the condensing refrigerant will normally be higher in temperature than the entering air temperature.
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