A refrigerator absorbs 137 kJ/kg of heat from a cool compartment at -10°C and rejects heat to the kitchen air at 30 °C. The amount of work supplied to the refrigerator is 54 kJ/kg. i) Sketch the schematic diagram of the refrigerator system. ii) Calculate the COP of the refrigerator. iii) Determine whether this refrigerator is reversible, irreversible or impossible.

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 2RQ: The operating condition for the single compressor in a household refrigerator is the lowest box...
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A refrigerator absorbs 137 kJ/kg of heat from a cool compartment at -10°C and rejects
heat to the kitchen air at 30 °C. The amount of work supplied to the refrigetator is
54 kJ/kg.
i) Sketch the schematic diagram of the refrigerator system.
ii) Calculate the COP of the refrigerator.
iii) Determine whether this refrigerator is reversible, irreversible or impossible.
iv) If the refrigerator is used as a heat pump, determine the COP of the heat pump.
Transcribed Image Text:A refrigerator absorbs 137 kJ/kg of heat from a cool compartment at -10°C and rejects heat to the kitchen air at 30 °C. The amount of work supplied to the refrigetator is 54 kJ/kg. i) Sketch the schematic diagram of the refrigerator system. ii) Calculate the COP of the refrigerator. iii) Determine whether this refrigerator is reversible, irreversible or impossible. iv) If the refrigerator is used as a heat pump, determine the COP of the heat pump.
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