BS/EN 13203-4-2016 pdf download.Gas-fired domestic appliances producing hot water Part 4: Assessment of energy consumption of gas combined heat and power appliances (mCHP) producing hot water and electricity.
The tests shall be carried out in the summer mode when the mCHP generator of the appliance is
producing domestic hot water only.
For all tests defined by this standard, the same adjustment of the appliance shall be maintained.
4.3.2 Test room
The appliance shall be installed in a well-ventilated, draught-free room (air speed less than 0,5 m/s).
The appliance shall be protected from direct solar radiation and radiation from heat generators.
4.3.3 Water supply
For the tests:
— the domestic water pressure is the static inlet pressure under dynamic conditions measured as close as possible to the appliance;
— the inlet and outlet temperatures of the domestic water shall be measured in the centre of the flow and as close as possible to the appliance.
The inlet temperatures shall be measured immediately upstream of the water inlet connection. Except where otherwise stated, the outlet temperatures shall be measured immediately downstream of the outlet connection or, in the case of an appliance with spout delivery, by means of an immersed temperature measuring device, e.g. a u-tube fitted at the outlet of a tube of the same length as the minimum length of the spout normally supplied with the appliance.
The hot water temperature shall be measured with a rapid response thermometer.
Rapid response thennometer means a measuring instrument with a response time such that 90 % of the final temperature rise, from 15 °C to 100 °C. is obtained within about 1 s, when the sensor is plunged into still water.
4.3.4 Steady-state
Steady-state operating conditions shall be regarded as established when the appliance operates for sufficient time to reach thermal stabilization. The steady-state is reached when the water temperature at the outlet does not vary by more than ± 0,5 K.
NOTE This condition can be reached with a gas that is different from the specified test gas. provided that the appliance is supplied with the specified test gas for at least 5 mm before the requirements are verified.
4.3.5 Initial adjustment of the appliance
The appliance shall be installed in accordance with the appliance instructions.
The heat input shall be adjusted to within ± 2 % of the nominal domestic hot water heat input.
These conditions shall be included in the test report.
4.3.6 Electrical supply
The appliance shall be supplied with the nominal voltage or a voltage included within the range of nominal voltages stated in the installation instructions.
4.3.7 Delivered electrical energy
Arrangement shall be made to enable the delivered electrical energy to be measured.
NOTE The delivered electrical energy to be measured may be dissipated by a resistor or exported to the grid.
5 Determination of the energy consumption and electrical energy generation of
the appliance
5.1 General
This clause defines the test methods to be employed in determining the energy consumption and electrical energy generation of appliances.
5.2 Tapping cycles
All patterns define a 24 h measurement cycle and within that cycle the starting times and the total energy content (in kWh equivalent of hot water tapped) of each draw-off are defined.
Furthermore, the draw-off can be characterized in two ways, either “basin” type draw-off versus “continuous low” draw-off.
The aim of the “basin” type is to arrive at an average temperature of the tub, so all supplied energy can he considered useful from the very beginning of the draw-off (minimum useful temperature increase is 0 K). The average temperature rising (AT) to be achieved during tapping, shall be for floor cleaning and bath 30 K and for the dish washes 45 K.
The aim of the “continuous flow” type is to use only the water with a minimum temperature. For the shower1 household cleaning and large draw.offs a temperature rise of 30 K shall be reached before counting the useful energy. For the small draw-offs a temperature rise of 15 K shall be reached.
NOTE 1 The temperature rises (in K) stated above are equivalent to the temperatures (in °C) given by the load profiles tables in Regulations n° 811/2013. no 812/2013, no 813/2013 and no 814/2013 based on 10°C inlet water temperature.
The tapping flow rates used to perform the different types of tapping of each of the seven tapping cycles defined by Tables 1 to 7.When these tapping rates result in a tapping period of less than 15 s the flow rate should be decreased such that the tapping period is (16 ± 1) s.BS/EN 13203-4-2016 pdf download.
BS/EN 13203-4-2016 pdf download
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