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Renewable energy v.105, 2017년, pp.66 - 75   SCIE
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Influence of pellet length on performance of pellet room heaters under real life operation conditions

Wöhler, Marius (University of Applied Forest Sciences Rottenburg, Schadenweilerhof, D-72108 Rottenburg am Neckar, Germany ); Jaeger, Dirk (University of Freiburg, Chair of Forest Operations, Werthmannstraße 6, D-79085 Freiburg im Breisgau, Germany ); Reichert, Gabriel (Bioenergy 2020+ GmbH, Gewerbepark Haag 3, 3250 Wieselburg-Land, Austria ); Schmidl, Christoph (Bioenergy 2020+ GmbH, Gewerbepark Haag 3, 3250 Wieselburg-Land, Austria ); Pelz, Stefan K. (University of Applied Forest Sciences Rottenburg, Schadenweilerhof, D-72108 Rottenburg am Neckar, Germany );
  • 초록  

    Abstract Wood pellet combustion for heating is increasing in importance in Europe. However, the most commonly used heating appliances such as wood pellet stoves are responsible for emissions which could negatively affect human health. The emissions quality of pellet stoves is influenced by pellet properties and combustion phase characteristics. The goal of this study is to investigate the influence of pellet length on the performance of pellets stoves under real life operation conditions. Three softwood pellet samples were produced, differing only in length. Combustion tests with two different types of pellet stoves were performed in steady and non-steady combustion phases. Gaseous and particulate emissions as well as fuel mass flow were measured. Results show a reduced fuel mass flow (up to 36%) into the combustion chamber for long pellets compared to short pellets. The results of the combustion tests show a considerable influence of pellet length on the performance of both pellet stoves. For example, carbon monoxide emissions and particulate emissions of one stove in nominal load operation increased for long pellets compared to short pellets from 185 mg/m 3 to 882 mg/m 3 , and from 27 mg/m 3 to 37 mg/m 3 respectively. Results also show a considerable influence of the combustion phase on the emissions level. Highlights Effect of pellet length on CO, OCG and PM emissions. Influence of combustion phase on emissions of wood pellet stoves. Influence of pellet length on fuel mass flow in pellet stoves. Identification of a new pellet characterization parameter.


  • 주제어

    Pellet length .   Pellet stove .   Fuel mass flow .   Biomass combustion .   Emissions.  

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