QUESTION 3 The refrigeration plant onboard a fishing vessel maintain minus 20 °C in a fish storage hatch at a design ambient air temperature of 33 "C. The plant which rejects condenser heat to sea water at +22°C operates at evaporating and condensing temperatures of minus 20 °C and 30 °c respectively. It is fitted with a 4- cylinder R134a compressor having a bore of 100 mm, stroke 150 mm and speed 1500 rpm. Given that the suction gas superheat is 10 °C, condensate sub cooling is 10°C, volumetric efficiency of compressor is 80 % and discharge gas temperature 65°C, determine the following: (a) Power consumption. (b) Isentropic efficiency. (c) Cooling capacity. (d) Carnot efficiency of the plant.

QUESTION 3 The refrigeration plant onboard a fishing vessel maintain minus 20 °C in a fish storage hatch at a design ambient air temperature of 33 "C. The plant which rejects condenser heat to sea water at +22°C operates at evaporating and condensing temperatures of minus 20 °C and 30 °c respectively. It is fitted with a 4- cylinder R134a compressor having a bore of 100 mm, stroke 150 mm and speed 1500 rpm. Given that the suction gas superheat is 10 °C, condensate sub cooling is 10°C, volumetric efficiency of compressor is 80 % and discharge gas temperature 65°C, determine the following: (a) Power consumption. (b) Isentropic efficiency. (c) Cooling capacity. (d) Carnot efficiency of the plant.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.36P

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