xmlns:atom="http://www.w3.org/2005/Atom" xmlns:atom="http://www.w3.org/2005/Atom"
Technical parameters used for the calculations shall be measured in accordance with Annex VII.
The following parameters shall be calculated for water heaters under average climate conditions:
the water heating energy efficiency ηwh in %, rounded to one decimal place;
the annual electricity consumption AEC in kWh in terms of final energy, rounded to the nearest integer;
in addition, for water heaters using fuels under average climate conditions:
the annual fuel consumption AFC in kWh in terms of GCV, rounded to the nearest integer;
in addition, for solar water heaters under average climate conditions:
the heat generator water heating energy efficiency ηwh,nonsol in %, rounded to one decimal place;
the annual auxiliary electricity consumption Qaux in kWh in terms of final energy, rounded to one decimal place;
in addition, for solar water heaters and heat pump water heaters under colder and warmer climate conditions:
the parameters set out in points (a) to (c);
in addition for solar water heaters under average, colder and warmer climate conditions:
the annual non-solar heat contribution Qnonsol in kWh in terms of primary energy for electricity and/or in kWh in terms of GCV for fuels, rounded to one decimal place.
The water heating energy efficiency is calculated as follows:
For water-/brine-to-water heat pump water heaters, the electricity consumption of one or more ground water pumps shall be taken into account.
The water heating energy efficiency is calculated as follows:
Where:
The annual electricity consumption AEC in kWh in terms of final energy is calculated as follows:
The annual fuel consumption AFC in GJ in terms of GCV is calculated as follows:
The annual electricity consumption AEC in kWh in terms of final energy is calculated as follows:
The annual fuel consumption AFC in GJ in terms of GCV is calculated as follows:
The ambient correction term is calculated as follows:
Where:
the k-values are given in Table 8 for each load profile.
k-values
3XS | XXS | XS | S | M | L | XL | XXL | |
---|---|---|---|---|---|---|---|---|
k | 0,23 | 0,23 | 0,23 | 0,23 | 0,23 | 0,23 | 0,23 | 0,0 |