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The catalogue for a refrigerant 22, four-cylinder, hermetic compressor operating at 29 r/s. a condensing temperature of 40 °C and an evaporating temperature of -4 °C shows a refrigeration capacity of 96.4 kW. At this operating points the motor (whose efficiency is 90 percent) draws 28.9 kW. The bore of the cylinders is 87 mm and the piston stroke is 70 mm. The performance data are based on 8 °C of subcooling of the liquid leaving the condenser. Compute 3.1 the actual volumetric efficiency and  3.2 the compression efficiency.

The catalogue for a refrigerant 22, four-cylinder, hermetic compressor operating at 29 r/s. a condensing temperature of 40 °C and an evaporating temperature of -4 °C shows a refrigeration capacity of 96.4 kW. At this operating points the motor (whose efficiency is 90 percent) draws 28.9 kW. The bore of the cylinders is 87 mm and the piston stroke is 70 mm. The performance data are based on 8 °C of subcooling of the liquid leaving the condenser. Compute 3.1 the actual volumetric efficiency and  3.2 the compression efficiency.

Elements Of Electromagnetics
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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The catalogue for a refrigerant 22, four-cylinder, hermetic compressor operating at 29
r/s. a condensing temperature of 40 °C and an evaporating temperature of -4 °C shows
a refrigeration capacity of 96.4 kW. At this operating points the motor (whose efficiency
is 90 percent) draws 28.9 kW. The bore of the cylinders is 87 mm and the piston stroke
is 70 mm. The performance data are based on 8 °C of subcooling of the liquid leaving
the condenser. Compute
3.1 the actual volumetric efficiency and 
3.2 the compression efficiency.

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