Q74
Which of the following statement is wrong?
A.
The performance of the vapour compression refrigerator varies considerably with both vaporising and condensing temperatures.
B.
In vapour compression cycle, the useful part of the heat transfer is at the condenser.
C.
In ammonia-hydrogen (Electrolux) refrigerator, no compressor, pump or fan is required.
D.
The effect of under-cooling the liquid refrigerant is to decrease the coefficient of performance.
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Subcooling in refrigeration implies cooling the refrigerant in liquid state, at uniform pressure, to a temperature that is less than the saturation temperature, which corresponds to condenser pressure.