A 75 − kW refrigeration load is to be carried by an air refrigerating system with a discharge pressure of 1,370 kPa and a refrigerator pressure of 345 kPa Compression and expansion processes are polytropic with n = 1.37. The pressure at the start of expansion is 1344 kPa and the temperature is 32°C. Air temperature leaving the refrigerator is 0°C and entering the compressor is 5°C. Clearance for both compressor and expander is 5%. Determine a. the piston displacement of the compressor in m^3/kg b. the piston displacement of the expander in m^3/kg

A 75 − kW refrigeration load is to be carried by an air refrigerating system with a discharge pressure of 1,370 kPa and a refrigerator pressure of 345 kPa Compression and expansion processes are polytropic with n = 1.37. The pressure at the start of expansion is 1344 kPa and the temperature is 32°C. Air temperature leaving the refrigerator is 0°C and entering the compressor is 5°C. Clearance for both compressor and expander is 5%. Determine a. the piston displacement of the compressor in m^3/kg b. the piston displacement of the expander in m^3/kg

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

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 12RQ: Refrigerators currently being manufactured in the United States are using______as their refrigerant.

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Question

A 75 − kW refrigeration load is to be carried by an air refrigerating system with a discharge

pressure of 1,370 kPa and a refrigerator pressure of 345 kPa Compression and expansion

processes are polytropic with n = 1.37. The pressure at the start of expansion is 1344 kPa

and the temperature is 32°C. Air temperature leaving the refrigerator is 0°C and entering

the compressor is 5°C. Clearance for both compressor and expander is 5%. Determine

a. the piston displacement of the compressor in m^3/kg

b. the piston displacement of the expander in m^3/kg

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