Question

What is the coefficient of performance of a refrigerator that operates with Carnot efficiency between temperatures $-{3.00}^{0}C$ and $+{27.0}^{0}C$?

Answer 1

Given Data

$T_c=-3^{\circ }C=270K$

$T_h={27}^{\circ }C=300K$

We are asked to find the Carnot COP of the refrigerator.

The Carnot COP of the refrigerator is found from Equation

${COP}_C=\frac{T_c}{T_h-T_c}$

Substitute numerical values:

${COP}_C=\frac{270}{300-270}$

${COP}_C=9$