Question:-
A refrigeration plant uses a condenser with heat rejection ratio of 1.2. If the capacity of the plant is 210 kJ/min, then what is the value of the COP of the refrigeration point?
Option (A)
3
Option (B)
5
Option(C)
7
Option(D)
9
Correct Option:
(B)
Question Solution:
Heat rejection ratio: The load on the condenser per unit of refrigeration capacity is known as heat rejection factor. The load on the condenser (QC) is given by
QC = Refrigeration capacity + work done by compressor
Qc = RE + W
HRR = (QC/RE) = {(RE+W)/RE} = 1 + (w/RE)
HRR = 1 + (1/COP)
Then 1.2 = 1 + (1/COP)
\ COP = 5
question-answer-faq-9480