An ideal gas refrigeration cycle using air as the working fluid is to maintain a refrigerated space at -20°C while rejecting heat to the surrounding medium till the surrounding temperature reaches 25°C. If the pressure ratio of the compressor is 3, (a) Sketch the cycle on a T-s diagram. (b) Assess the maximum and minimum temperatures in the cycle. (c) Evaluate the coefficient of performance. (d) Solve for the rate of refrigeration for a mass flow rate of 0.8 kg/s.

An ideal gas refrigeration cycle using air as the working fluid is to maintain a refrigerated space at -20°C while rejecting heat to the surrounding medium till the surrounding temperature reaches 25°C. If the pressure ratio of the compressor is 3, (a) Sketch the cycle on a T-s diagram. (b) Assess the maximum and minimum temperatures in the cycle. (c) Evaluate the coefficient of performance. (d) Solve for the rate of refrigeration for a mass flow rate of 0.8 kg/s.

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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