Question

What is the best coefficient of performance for a refrigerator that cools an environment at -26.0°C and has heat transfer to another environment at 50.0°C?

Answer 1

Answer:

COP = 4.25

Explanation:

It is given that,

Cooling temperature, $T_c=-26^{\circ}C=273-26=247\ K$

Heating temperature, $T_h=50^{\circ}C=323\ K$

We need to find the coefficient of performance. It is given by :

$COP=\dfrac{T_h}{T_h-T_c}$

$COP=\dfrac{323}{323-247}$

COP = 4.25

So, the best coefficient of performance of a refrigerator is 4.45 Hence, this is the required solution.