Coefficient of Performance (COP) is a ratio of the work or useful energy output that describes efficiency of the amount of work or energy inputted into the system as determined by using the same energy equivalents for energy in and out. A COP is the most basic energy-efficiency metric of any heat engine such as heat pump, refrigerator or air conditioning system, etc. COP is Q/W, higher COPs equate to higher efficiency. (e.g., a 1000W heat pump with a COP of 3.5, the heat pump gives back 3500W worth of heat).
Related Definitions in the Project: The Engineering; Renewable Energy
