Question

A refrigerator is to maintain eatables kept inside at $9^{o}C$. If room temperature is ${36}^{o}C$, calculate the coefficient of performance.

Answer 1

Temperature inside the refrigerator, $T_1=9^{o}C=282K$

Room temperature, $T_2={36}^{o}C=309K$

Coefficient of performance $=T_1/(T_2-T_1)$

$=282/(309-282)$

$=10.44$

Therefore, the coefficient of performance of the given refrigerator is 10.44.