Thermodynamics Question 169
Question: In a mechanical refrigerator, the low temperature coils are at a temperature of ’ 23°C and the compressed gas in the condenser has a temperature of 27°C. The theoretical coefficient of performance is
[UPSEAT 2001]
Options:
A) 5
B) 8
C) 6
D) 6.5
Show Answer
Answer:
Correct Answer: A
Solution:
Coefficient of performance $ K=\frac{T _{2}}{T _{1}-T _{2}} $
$ =\frac{(273-23)}{(273+27)-(273-23)} $
$ =\frac{250}{300-250}=\frac{250}{20}=5 $
