volumetric efficiency and if the discharge pressure shall be raised to 1400 kPa, a) what is the percent increase in mass of R-12 b.) what will be the new volumetric displacement of the compressor in m3/sec c.) at what speed should the compressor be run

volumetric efficiency and if the discharge pressure shall be raised to 1400 kPa, a) what is the percent increase in mass of R-12 b.) what will be the new volumetric displacement of the compressor in m3/sec c.) at what speed should the compressor be run

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 20RQ: Welded ______sealed compressors are normally used in household refrigerators.

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Question

a 140x140-mm, twin-cylinder, single acting refrigerant-12 compressor running at 600 rpm carries a refrigeration capacity of 40kW while operating at 350 kPa suction and 1300 kPa discharge pressures, assuming the same load to be carried with the same volumetric efficiency and if the discharge pressure shall be raised to 1400 kPa, a) what is the percent increase in mass of R-12 b.) what will be the new volumetric displacement of the compressor in m3/sec c.) at what speed should the compressor be run?

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