An air refrigeration system having pressure ratio of 5 takes air at 0°C and 1 atm. It is compressed and then cooled to 19°C. A pressure drop of 5 kPa is measured in both cooler and refrigerator. If the efficiency of the compressor is 95% and that of the expander is 75%, determine the refrigeration capacity of the system TR, and the COP of the system if the flow of air is 7.5 kg/min. Assume compression and expansion processes to be isentropic.

An air refrigeration system having pressure ratio of 5 takes air at 0°C and 1 atm. It is compressed and then cooled to 19°C. A pressure drop of 5 kPa is measured in both cooler and refrigerator. If the efficiency of the compressor is 95% and that of the expander is 75%, determine the refrigeration capacity of the system TR, and the COP of the system if the flow of air is 7.5 kg/min. Assume compression and expansion processes to be isentropic.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

An air refrigeration system having pressure ratio of 5 takes air at 0°C and 1 atm. It is compressed and then
cooled to 19°C. A pressure drop of 5 kPa is measured in both cooler and refrigerator. If the efficiency of the
compressor is 95% and that of the expander is 75%, determine the refrigeration capacity of the system
TR, and the COP of the system
if the flow of air is 7.5 kg/min. Assume
compression and expansion processes to be isentropic.

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