Worked example
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Heating COP, instantaneous
3
- Electrical input within the boundary
- 100 kW
- Auxiliary share of the electricity
- 10 %
- Delivered heat
- 300 kW
The factor is only as complete as the entered thermal and electrical measurement boundary.
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Method and assumptions
Formula
COP or SPF = delivered heat ÷ (heat-pump electricity + included auxiliary electricity)Use rates for instantaneous COP and matching-period energies for seasonal performance.
Limits of this result
- The result is only comparable when delivered heat and every included electrical input share the same boundary and period.
- An instantaneous COP does not represent seasonal weather, cycling, defrost or auxiliary-heat performance.
- A seasonal factor built from estimated heat output inherits the assumptions and uncertainty of that estimate.
Technical sources
Put the value to work
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