Analysis on classification of application conditions of COP and EER

COP and EER have been widely used as important indices to evaluate the performance of heat pumps and refrigerating units in China. Aiming at the inconsistent definitions of COP and disagreement about COP among national standards, as well as chaotic situations in documents and engineering practice, puts forward the classification of application conditions of COP and EER after analysing their history and relevant definitions in standards at home and abroad, in order to clarify their applicable ranges and eliminate different meanings. Suggests that the definitions of COP should be unified by relevant departments for reasonable application.