Heat Pump Performance: water_source
Heat pump COP and capacity fraction data as a function of outdoor temperature (air-source) or entering water temperature (ground/water-source) — covers air-source heating/cooling, cold-climate ASHP, ground-source, and water-source heat pumps
| heat pump type | outdoor temp F | capacity fraction (dimensionless) | cop (dimensionless) | notes | power input kW (kW) |
|---|---|---|---|---|---|
| water_source | 55 | 0.86 | 3.5 | WSHP heating; EWT 55F; lower loop temperature — heating-dominated building; boiler typically activated to maintain loop above 60F; COP still good vs electric resistance | 4.32 |
| water_source | 60 | 0.92 | 3.8 | EWT 60F; lower end of water loop band; still excellent COP vs air-source | 4.26 |
| water_source | 65 | 1 | 4.2 | Water-source heat pump (WSHP) in loop system; entering water temp 65F heating mode; water loop maintained 60-90F in central plant system | 4.19 |
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