Question:-
The values of enthalpy at the beginning of compression, at the end of compression and at the end of condensation are 185 kJ/kg, 210 kJ/kg and 85 kJ/kg, respectively. What is the value of the COP of the vapour compression refrigeration system?
Option (A)
0.25
Option (B)
5.4
Option(C)
4
Option(D)
1.35
Correct Option:
(C)
Question Solution:

Given:
h1 = 185 KJ/kg
h2 = 210 KJ/kg
h4 = 85 KJ/kg
COP = {(h1-h4)/(h2-h1)} = {(185-85) / (210-185)} = 100/25
COP = 4
question-answer-faq-9477