Energy & electrical
Heat-pump COP
- where
- coefficient of performance
- useful heat output (kW)
- electrical input (kW)
Explain this equation
Works out a heat pump's coefficient of performance: the heat delivered for each unit of electricity used. Use it to check measured or manufacturer performance.
P_heat is the useful heat output. P_elec is the electrical input, including any auxiliaries you choose to count, such as pumps or controls.
The heat pump moves heat from outside air or ground, so it delivers more heat than the electricity it uses. COP is simply output over input.
Sense check: 12 kW of heat from 3 kW of electricity is a COP of 4. COP falls as the flow temperature rises or the source gets colder.
Watch out: this is an instantaneous figure at stated conditions. It is not the seasonal SCOP or SPF.
Enter your values to see the result.
Good to know
Instantaneous ratio at stated conditions. It is not seasonal performance (SCOP/SPF).
Sources
Results are arithmetic only. Worked examples are not recommended design settings. This library does not provide automatic gas pipe selection, live gas tightness tests, purging procedures, combustion acceptance limits, installation approval or commissioning certification. Manufacturer data and the applicable current method remain essential.