What is BS EN 15544 – Dimensioning of tiled/mortared stoves about?
The Kachelgrundöfen/Putzgrundöfen (tiled/mortared stoves) are of individual one-off construction design. The tiled stove one off slow heat release appliance, which is adapted individually to local conditions and whose visible surface is predominantly made of tiles.
BS EN 15544 is a European Standard that discusses the dimensioning of tiled/mortared stoves. The main objective of BS EN 15544 is to provide calculation methods that ensure tiled/mortared stoves meet the intended heat output requirement.
BS EN 15544 specifies calculations for the dimensioning of tiled/mortared stoves based upon the required nominal heat output of the stove as declared by the producer.
BS EN 15544 can be used for log wood fired Kachelöfen (tile stoves) that burn one fuel load per storage period with a maximum load between 10 kg and 40 kg and a storage period (nominal heating time) between 8 h and 24 h.
BS EN 15544 is valid for tiled/mortared stoves equipped with fireclay as interior material, with an apparent density between 1,750 kg/m³ and 2,200 kg/m³, a degree of porosity from 18 % up to 33 % by volume and a heat conductivity from 0,65 W/mK up to 0,90 W/mK (temperature range 20 °C to 400 °C).
BS EN 15544 is valid for tiled/mortared stoves with sidewise combustion air supply of the combustion chamber and an inflow speed from 2 m/s to 4 m/s, whereas the height of the lowest opening is at least 5 cm above the bottom of the combustion chamber.
Note 1: BS EN 15544 is not valid for combinations with water heat exchangers for central heating or other heat absorbing elements like glass plates greater than 1/6 of the combustion chamber surface, open water tanks, etc.
Note 2: BS EN 15544 is also not valid for combinations with heating/fireplace elements according to EN 13229.
Note 3: Furthermore BS EN 15544 is not valid for mass-produced prefabricated or partly prefabricated slow heat release appliances according to EN 15250.
Who is BS EN 15544 - Dimensioning of tiled/mortared stoves for?
BS EN 15544 on dimensioning of tiled/mortared stoves is relevant to:
- Manufacturers of tiled/mortared stoves
- Manufacturers of solid fuel heaters
- Quality control and testing personnel
- Mechanical engineers
- Product design engineers
Why should you use BS EN 15544 - Dimensioning of tiled/mortared stoves?
This calculation method for the dimensioning of tiled/mortared stoves is based on appropriate literature as well as EN 13384-1, and where empirically determined correlations are used in addition to physical and chemical formulas.
BS EN 15544 discusses calculation methods which include:
- Nominal heat output calculation
- Fuel load calculation
- Design calculations of the essential dimensions
- Calculation of burning rate
- Fixing air ratio calculation
- Combustion calculation of air density and flue gas and
- Calculation of flow mechanics
If the calculations of BS EN 15544 are observed, the minimum energy efficiency of 78% and the emission values of carbon monoxide 1 500 mg/mn³ (1 000 mg/MJ), nitrogen dioxide 225 mg/mn³ (150 mg/MJ), organically bound carbon 120 mg/mn³ (80 mg/MJ) and dust 90 mg/mn³ (60 mg/MJ) can be observed too.
As a result, if you are a manufacturer of tiled/mortared stoves, adopting BS EN 15544 calculation methods can help determine whether your products are energy efficient, which can ultimately avoid unnecessary wastage of fuel.
