COP - Cooling
Coefficient of performance for cooling: useful evaporator duty divided by compressor work. The headline refrigeration efficiency number.
COP_cooling
4.17 -
EER (imperial)
14.22Btu/Wh
Formula, assumptions, and limits
$$\text{COP}_\text{cool} = \frac{Q_\text{evap}}{W_\text{comp}}$$
Marine provision-room cooling units: COP 2.5–3.5. AC plants: COP 3–4. Reefer containers at −20 °C: 1.2–1.6. Approaching the Carnot limit requires small lift and / or novel cycles.
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 |
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