QI: A dense closed cycle refrigeration system working hetween 4 bar and 16 bar extracts 126 MJ of heat per hour. The air enters the compressor at 5°C and into the expander at 20°C. The isentropic efficiency of the compressor is 80% and. The isentropic efficiency of the expander is 85%. The compressor and expander are single acting. Assuming the unit runs at 300 rpm, find out 1. Power required to run the unit; 2. Bore of the compressor; and 3. Refrigeration capacity in tonnes of refrigeration (TR). For air, cp-1 Kj/Kg.K and R-287 j/Kg.K.

QI: A dense closed cycle refrigeration system working hetween 4 bar and 16 bar extracts 126 MJ of heat per hour. The air enters the compressor at 5°C and into the expander at 20°C. The isentropic efficiency of the compressor is 80% and. The isentropic efficiency of the expander is 85%. The compressor and expander are single acting. Assuming the unit runs at 300 rpm, find out 1. Power required to run the unit; 2. Bore of the compressor; and 3. Refrigeration capacity in tonnes of refrigeration (TR). For air, cp-1 Kj/Kg.K and R-287 j/Kg.K.

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

Chapter35: Comfort And Psychrometrics

Section: Chapter Questions

Problem 12RQ: A gas furnace has an output of 60,000 Btu/h. The return air temperature is 72F, and the temperature...

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