The EN 303-5 standard not only describes constructional and operational requirements but also sets the acceptable emission limits at the flue gases.
EN 303-5 standard has been set in order to define design, constructional, safety and operational requirements regarding solid fuel heating boilers. Under the category “solid fuels” biomass is included, too.
The european Union Member states’ political resolve to develop the energy potential of solid biomass has started to pay off, as in 2010 there were clear signs that growth of primary energy production had quickened pace.
Biomass ash is defined as the solid residue of biomass combustion of biomass feedstock so as to produce heat and electricity. In general, it contains plenty of macronutrients and micronutrients that are resistant to high temperatures.
The use of woody-biomass pellets for heating buildings has significant advantages and therefore in several European countries the number of residential heating systems which consume biomass (including pellets) has grown significantly the field during the last decade.
Ιn 2008, according to the European Program Pellets Atlas, Greece produced a total of about 27,800 tons of pellets, while the installed capacity amounted to 87,000 tonnes.
Biomass moisture content is defined as the amount of water in the biomass expressed as a percentage of the material’s weight. Moisture content has a significant effect on the engineering of the conversion process; either a thermochemical (i.e. combustion) process is considered or a biochemical (i.e. fermentation).