ANNEX IVMethod for calculating the Energy Efficiency Index
3.CALCULATION OF THE ENERGY EFFICIENCY INDEX
For the calculation of the Energy Efficiency Index (EEI), of a household refrigerating appliance model, the Annual Energy Consumption of the household refrigerating appliance is compared to its Standard Annual Energy Consumption.
- 1.
The Energy Efficiency Index (EEI) is calculated and rounded to the first decimal place, as:
where:
- — AEC
Annual Energy Consumption of the household refrigerating appliance
- — SAEC
Standard Annual Energy Consumption of the household refrigerating appliance.
- 2.
The Annual Energy Consumption (AEC) is calculated in kWh/year and rounded to two decimal places, as:
AEc = E24h × 365
where:
E24h is the energy consumption of the household refrigerating appliance in kWh/24h and rounded to three decimal places.
- 3.
The Standard Annual Energy Consumption (SAEC) is calculated in kWh/year and rounded to two decimal places, as:
SAEc = Veq × M + N + CH
where:
Veq is the equivalent volume of the household refrigerating appliance
CH is equal to 50 kWh/year for household refrigerating appliances with a chill compartment with a storage volume of at least 15 litres
the M and N values are given in Table 7 for each household refrigerating appliance category.
Category | M | N |
---|---|---|
1 | 0,233 | 245 |
2 | 0,233 | 245 |
3 | 0,233 | 245 |
4 | 0,643 | 191 |
5 | 0,45 | 245 |
6 | 0,777 | 303 |
7 | 0,777 | 303 |
8 | 0,539 | 315 |
9 | 0,472 | 286 |
10 | ||
Note: | ||
for Category 10 household refrigerating appliances the M and N values depend on the temperature and star rating of the compartment with the lowest storage temperature capable of being set by the end-user and maintained continuously according to the manufacturer’s instructions. When only an ‘other compartment’ as defined in Table 2 and Annex I, point (p), is present, the M and N values for Category 1 are used. Appliances with three-star compartments or food-freezer compartments are considered to be refrigerator-freezers. |