Coefficient of performance
The coefficient of performance (COP) is an important parameter when talking about heat pumps and heating systems; it indicates how much energy is transferred to the water in relation to the supply of energy (normally electricity). For heat pumps the only electricity supplied is to the compressor. The COP (e) will therefore be the relation between the energy released in the condenser and the energy added to the compressor.
e=Qreleased in condenser/Qadded to compressor
Normally for commercial heat pumps used in fish farming, COP can be up to 5.