 | This article relies largely or entirely on a single source. (August 2011) |
In Europe, the seasonal efficiency of refrigeration equipment, chillers and air conditioners is often rated by the European seasonal energy efficiency ratio (ESEER) which is controlled (among others) by the Eurovent Certification Company.[1] A similar standard in the United States is the integrated energy efficiency ratio (IEER).
The ESEER is calculated by combining full and part load operating Energy Efficiency Ratios (EER), for different seasonal air or water temperatures, and including for appropriate weighting factors. These values are shown in the following table.
| Partial load ratio | Air temperature (°C) | Water temperature (°C) | Weighting coefficients |
|---|---|---|---|
| 100 | 35 | 30 | 3% |
| 75 | 30 | 26 | 33% |
| 50 | 25 | 22 | 41% |
| 25 | 20 | 18 | 23% |
The formula for ESEER can then be presented as follows:
- ESEER = (EER@100% load × 0.03) + (EER@75% load × 0.33) + (EER@50% load × 0.41) + (EER@25% load × 0.23)[1]
Eurovent publishes EER and ESEER values in its Directory of Certified Products together with cooling capacity and power input for standard conditions at full load for a wide variety of commercially available equipment.
- ^ a b "Eurovent Paper: Effect of the Certification on Chillers Energy Efficiency" (PDF). Eurovent. 2006. Archived from the original (PDF) on 2012-03-21. Retrieved 2011-08-06.