A refrigerator is used to keep the cold space at 5 °C by rejecting 8 kJ/s of heat by the condenser to the outdoor air at 25 °C. If the compressor consumes 3 kJ/s of power, determine i. the rate of heat removed from the cold space (kJ/s), ii. the COP of the refrigerator iii. the minimum power input to the compressor for the same rate of heat removed (kJ/s), and iv. draw the schematic of the refrigerator as a reversed heat engine.
A refrigerator is used to keep the cold space at 5 °C by rejecting 8 kJ/s of heat by the condenser to the outdoor air at 25 °C. If the compressor consumes 3 kJ/s of power, determine i. the rate of heat removed from the cold space (kJ/s), ii. the COP of the refrigerator iii. the minimum power input to the compressor for the same rate of heat removed (kJ/s), and iv. draw the schematic of the refrigerator as a reversed heat engine.
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.
Chapter8: Natural Convection
Section: Chapter Questions
Problem 8.46P
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A refrigerator is used to keep the cold space at 5 °C by rejecting 8 kJ/s of heat by the condenser to
the outdoor air at 25 °C. If the compressor consumes 3 kJ/s of power, determine
i. the rate of heat removed from the cold space (kJ/s),
ii. the COP of the refrigerator
iii. the minimum power input to the compressor for the same rate of heat removed (kJ/s), and
iv. draw the schematic of the refrigerator as a reversed heat engine.
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