Heat Pump COP Calculator — 公式
## How to Calculate Heat Pump COP
COP measures how efficiently a heat pump converts electricity into heat.
### Formula
**COP = Heat Output (BTU/hr) / (Electrical Input (W) * 3.412)**
A COP of 3 means the heat pump produces 3 units of heat for every 1 unit of electricity. This is possible because heat pumps move existing heat rather than generating it.
### Typical COP Values
- Air-source heat pump: 2.5-4.0
- Ground-source (geothermal): 3.5-5.0
- Resistance heating: 1.0
COP measures how efficiently a heat pump converts electricity into heat.
### Formula
**COP = Heat Output (BTU/hr) / (Electrical Input (W) * 3.412)**
A COP of 3 means the heat pump produces 3 units of heat for every 1 unit of electricity. This is possible because heat pumps move existing heat rather than generating it.
### Typical COP Values
- Air-source heat pump: 2.5-4.0
- Ground-source (geothermal): 3.5-5.0
- Resistance heating: 1.0
计算示例
A heat pump producing 36,000 BTU/hr using 3,000W of electricity, running 2,000 hours/year at $0.15/kWh.
- COP: 36,000 / (3,000 * 3.412) = 36,000 / 10,236 = 3.52
- Annual electricity: 3,000 * 2,000 / 1,000 = 6,000 kWh
- Heat pump cost: 6,000 * $0.15 = $900
- Gas furnace equivalent: 36,000 * 2,000 / 100,000 * $1.50 / 0.92 = $1,174