Annex VIII Method for calculating the energy efficiency index for professional refrigerated storage cabinets
United Kingdom
For the calculation of the energy efficiency index (EEI) of a professional refrigerated storage cabinet model, the annual energy consumption of the cabinet shall be compared to its standard annual energy consumption.
The EEI shall be calculated as:
EEI = (AEC/SAEC) × 100
Where:
AEC = E24h × af × 365
annual energy consumption of the cabinet in kWh/year
energy consumption of the cabinet over 24 hours
adjustment factor to be applied only for light-duty cabinets, according to Annex IX, point 2
SAEC = M × Vn + N
standard annual energy consumption of the cabinet in kWh/year
net volume of the appliance, which is the sum of net volumes of all compartments of the cabinet, expressed in litres.
M and N are given in the Table 2.
Table 2
M and N coefficient values
| Category | Value for M | Value for N |
|---|---|---|
| Vertical Chilled | 1,643 | 609 |
| Vertical Frozen | 4,928 | 1 472 |
| Counter Chilled | 2,555 | 1 790 |
| Counter Frozen | 5,840 | 2 380 |