GATE ME 2021 Set 2 — Question 31
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Thermodynamics → Refrigeration & Air Conditioning → Coefficient of Performance
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Question
Consider an ideal vapour compression refrigeration cycle working on R-134a refrigerant. The COP of the cycle is 10 and the refrigeration capacity is . The heat rejected by the refrigerant in the condenser is _______ kJ/kg (round off to the nearest integer).
Correct answer
165 to 165
Solution
For an ideal vapour compression refrigeration cycle:
Coefficient of Performance (COP) is defined as:
Given:
Calculating the work input:
The heat rejected in the condenser () is the sum of the refrigeration effect and the work input:
Rounding to the nearest integer, the heat rejected is 165 kJ/kg.
Coefficient of Performance (COP) is defined as:
Given:
Calculating the work input:
The heat rejected in the condenser () is the sum of the refrigeration effect and the work input:
Rounding to the nearest integer, the heat rejected is 165 kJ/kg.
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