Coefficient of performance for cooling: useful evaporator duty divided by compressor work. The headline refrigeration efficiency number.
Formula
$$ \text{COP}\text{cool} = \frac{Q\text{evap}}{W_\text{comp}} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $Q_\text{evap}$ | Heat absorbed at evaporator | kW | rating plate |
| $W_\text{comp}$ | Compressor shaft power | kW | electrical measurement |
| $COP$ | Coefficient of performance | - | result |
Sources
- ASHRAE Handbook - Refrigeration.