Commission Regulation (EU) No 814/2013Show full title

(1)

‘storage water heater’ means a water heater equipped with hot water storage tank(s), heat generator(s) and possibly other parts, which are contained in a single housing;

(2)

‘load profile’ means a given sequence of water draw-offs, as specified in Annex III, Table 1; each water heater meets at least one load profile;

(3)

‘water draw-off’ means a given combination of useful water flow rate, useful water temperature, useful energy content and peak temperature, as specified in Annex III, Table 1;

(4)

‘useful water flow rate’ (f) means the minimum flow rate, expressed in litres per minute, for which hot water is contributing to the reference energy, as specified in Annex III, Table 1;

(5)

‘useful water temperature’ (T_m ), means the water temperature, expressed in degrees Celsius, at which hot water starts contributing to the reference energy, as specified in Annex III, Table 1;

(6)

‘useful energy content’ (Q_tap ) means the energy content of hot water, expressed in kWh, provided at a temperature equal to, or above, the useful water temperature, and at water flow rates equal to, or above, the useful water flow rate, as specified in Annex III, Table 1;

(7)

‘energy content of hot water’ means the product of the specific heat capacity of water, the average temperature difference between the hot water output and cold water input, and the total mass of the hot water delivered;

(8)

‘peak temperature’ (T_p ) means the minimum water temperature, expressed in degrees Celsius, to be achieved during water draw-off, as specified in Annex III, Table 1;

(9)

‘reference energy’ (Q_ref ) means the sum of the useful energy content of water draw-offs, expressed in kWh, in a particular load profile, as specified in Annex III, Table 1;

(10)

‘maximum load profile’ means the load profile with the greatest reference energy that a water heater is able to provide while fulfilling the temperature and flow rate conditions of that load profile;

(11)

‘declared load profile’ means the load profile applied for conformity assessment;

(12)

‘daily electricity consumption’ (Q_elec ) means the consumption of electricity over 24 consecutive hours under the declared load profile, expressed in kWh in terms of final energy;

(13)

‘daily fuel consumption’ (Q_fuel ) means the consumption of fuels over 24 consecutive hours under the declared load profile, expressed in kWh in terms of GCV;

(14)

‘gross calorific value’ (GCV) means the total amount of heat released by a unit quantity of fuel when it is burned completely with oxygen and when the products of combustion are returned to ambient temperature; this quantity includes the condensation heat of any water vapour contained in the fuel and of the water vapour formed by the combustion of any hydrogen contained in the fuel;

(15)

‘smart control’ means a device that automatically adapts the water heating process to individual usage conditions with the aim of reducing energy consumption;

(16)

‘smart control compliance’ (smart) means the measure of whether a water heater equipped with smart controls fulfils the criterion set out in point 4 of Annex IV;

(17)

‘smart control factor’ (SCF) means the water heating energy efficiency gain due to smart control under the conditions set out in point 3 of Annex III;

(18)

‘weekly electricity consumption with smart controls’ (Q_{elec,week,smart} ) means the weekly electricity consumption of a water heater with the smart control function enabled, measured under the conditions set out in point 3 of Annex III, expressed in kWh in terms of final energy;

(19)

‘weekly fuel consumption with smart controls’ (Q_{fuel,week,smart} ) means the weekly fuel consumption of a water heater with the smart control function enabled, measured under the conditions set out in point 3 of Annex III, expressed in kWh in terms of GCV;

(20)

‘weekly electricity consumption without smart controls’ (Q_elec,week ) means the weekly electricity consumption of a water heater with the smart control function disabled, measured under the conditions set out in point 3 of Annex III, expressed in kWh in terms of final energy;

(21)

‘weekly fuel consumption without smart controls’ (Q_fuel,week ) means the weekly fuel consumption of a water heater with the smart control function disabled, measured under the conditions set out in point 3 of Annex III, expressed in kWh in terms of GCV;

(22)

‘ambient correction term’ (Q_cor ) means a term which takes into account the fact that the place where the water heater is installed is not an isothermal place, expressed in kWh;

(23)

‘standby heat loss’ (P_stby ) means the heat loss of a heat pump water heater in operating modes without heat demand, expressed in kW;

(24)

‘mixed water at 40 °C’ (V40) means the quantity of water at 40 °C, which has the same heat content (enthalpy) as the hot water which is delivered above 40 °C at the output of the water heater, expressed in litres;

(25)

‘average climate conditions’ mean the temperature and global solar irradiance conditions characteristic for the city of Strasbourg;

(26)

‘annual energy consumption’ (Q_tota ) means the annual energy consumption of a solar water heater, expressed in kWh in terms of primary energy and/or kWh in terms of GCV;

(27)

‘annual non-solar heat contribution’ (Q_nonsol ) means the annual contribution of electricity (expressed in kWh in terms of primary energy) and/or fuel (expressed in kWh in terms of GCV) to the useful heat output of a solar water heater, taking into account the annual amount of heat captured by the solar collector and the heat losses of the solar hot water storage tank;

(28)

‘solar collector’ means a device designed to absorb global solar irradiance and to transfer the heat energy so produced to a fluid passing through it; it is characterised by the collector aperture area, the zero-loss efficiency, the first-order coefficient, the second-order coefficient and the incidence angle modifier;

(29)

‘global solar irradiance’ means the rate of total incoming solar energy, both direct and diffuse, on a collector plane with an inclination of 45 degrees and southward orientation at the Earth’s surface, expressed in W/m²;

(30)

‘collector aperture area’ (A_sol ) means the maximum projected area through which unconcentrated solar radiation enters the collector, expressed in m²;

(31)

‘zero-loss efficiency’ (η₀ ) means the efficiency of the solar collector, when the solar collector mean fluid temperature is equal to the ambient temperature;

(32)

‘first-order coefficient’ (a₁ ) means the heat loss coefficient of a solar collector, expressed in W/(m² K);

(33)

‘second-order coefficient’ (a₂ ) means the coefficient measuring the temperature dependence of the first-order coefficient, expressed in W/(m² K²);

(34)

‘incidence angle modifier’ (IAM) means the ratio of the useful heat output of a solar collector at a given incidence angle and its useful heat output at an incidence angle of 0 degrees;

(35)

‘incidence angle’ means the angle between the direction to the sun and the direction perpendicular to the solar collector aperture;

(36)

‘solar hot water storage tank’ means a hot water storage tank storing heat energy produced by one or more solar collectors;

(37)

‘heat generator water heating energy efficiency’ (η_wh,nonsol ) means the water heating energy efficiency of a heat generator which is part of a solar water heater, expressed in %, established under average climate conditions and without using solar heat input;

(38)

‘auxiliary electricity consumption’ (Q_aux ) means the annual electricity consumption of a solar water heater that is due to the pump power consumption and the standby power consumption, expressed in kWh in terms of final energy;

(39)

‘pump power consumption’ (solpump) means the rated electrical power consumption of the pump in the collector loop of a solar water heater, expressed in W;

(40)

‘standby power consumption’ (solstandby) means the rated electrical power consumption of a solar water heater when the pump and the heat generator of a solar water heater are inactive, expressed in W;

(41)

‘equivalent model’ means a model placed on the market with the same technical parameters set out in the applicable product information requirements of Annex II as another model placed on the market by the same manufacturer.