Q4: a four cylinder 75 mm bore and 75 mm stroke compressor run at 25 rps and has a volumetric efficiency of 75%. If the volume of the suction gas is 0.248 m3/kg and the machine has operating efficiency of 75%, what power will required on simple saturation cycle when difference between enthalpies of the suction and discharge gases is 150kJ/kg. If the refrigeration effect is 1087 kJ/kg what is the output in kW of refrigeration. State the COP?

Q4: a four cylinder 75 mm bore and 75 mm stroke compressor run at 25 rps and has a volumetric efficiency of 75%. If the volume of the suction gas is 0.248 m3/kg and the machine has operating efficiency of 75%, what power will required on simple saturation cycle when difference between enthalpies of the suction and discharge gases is 150kJ/kg. If the refrigeration effect is 1087 kJ/kg what is the output in kW of refrigeration. State the COP?

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

Chapter28: Special Refrigeration Applications

Section: Chapter Questions

Problem 19RQ: Two methods used to power refrigeration compressors on a ship are _____and ____.

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