A food refrigerator is to provide a 15,000 kj/h cooling effect while rejecting 22,000 kj/h of heat. calculate the cop of this refrigerator.

Coefficient of performance or more commonly known as COP is calculated through the equation,

COP = ((T₂) / (T₂ - T₁))

where T₂ is the hot temperature and T₁ is the cold temperature. Similarly, these can also be,

COP = heat ejected / (heat ejected - heat provided)

Substituting,

COP = 22,000 / (22,000 - 15,000) = 3.14

Thus, the value of the COP is approximately 3.14.