Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. IX
Written by Georgi KOMITOV, Dimo PENKOV, Violeta RASHEVA
The pellets are environmentally friendly bio fuels and have a lot of advantages over conventional firewood or biomass for heating. The European EN 14961-2 standard defining the requirements for pellets has been in force since 2010. Many pellet manufacturers certify their production according to the German standard DIN 51731 or according to the Austrian standard ÖNORM M 7135. All pellet labels state that they are manufactured according to EN 14961-2 standard. But does the inscription on the pellet packaging correspond to reality because the regulation does not require providing data about the specific calorific value on the pellet label. The calorific value of the pellets is one of the most important parameters from the customer's perspective. The aim of this paper is to define the quality of various types of wood and agro pellets as well as of one type of biomass, produced from rose stems by directly measuring of their combustion characteristics and to compare them. The measurements were made under laboratory conditions using a KL-11 calorimeter.
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