Question: what is the relation between cop of heat pump and refrigerator?
Answer: COPHP = (Desired Output)/(Required Input) = (Heating Effect)/(Work Input) = QH/Wnet,in = 1 + (QL/Wnet,in) Both the COP of a refrigerator and a heat pump can be greater than one. Combining these two equations results in: COPHP = COPR + 1 for fixed values of QH and Q.