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Influence of pellet length on performance of pellet room heaters under real life operation conditions

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  • Wöhler, Marius
  • Jaeger, Dirk
  • Reichert, Gabriel
  • Schmidl, Christoph
  • Pelz, Stefan K.

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/m3 to 882 mg/m3, and from 27 mg/m3 to 37 mg/m3 respectively. Results also show a considerable influence of the combustion phase on the emissions level.

Suggested Citation

  • Wöhler, Marius & Jaeger, Dirk & Reichert, Gabriel & Schmidl, Christoph & Pelz, Stefan K., 2017. "Influence of pellet length on performance of pellet room heaters under real life operation conditions," Renewable Energy, Elsevier, vol. 105(C), pages 66-75.
    • Handle: RePEc:eee:renene:v:105:y:2017:i:c:p:66-75
    DOI: 10.1016/j.renene.2016.12.047
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    References listed on IDEAS

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    1. Fournel, S. & Palacios, J.H. & Morissette, R. & Villeneuve, J. & Godbout, S. & Heitz, M. & Savoie, P., 2015. "Influence of biomass properties on technical and environmental performance of a multi-fuel boiler during on-farm combustion of energy crops," Applied Energy, Elsevier, vol. 141(C), pages 247-259.
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    2. Duong, Van Minh & Flener, Ursula & Hrbek, Jitka & Hofbauer, Hermann, 2022. "Emission characteristics from the combustion of Acacia Mangium in the automatic feeding pellet stove," Renewable Energy, Elsevier, vol. 186(C), pages 183-194.
    3. Vicente, E.D. & Vicente, A.M. & Evtyugina, M. & Carvalho, R. & Tarelho, L.A.C. & Paniagua, S. & Nunes, T. & Otero, M. & Calvo, L.F. & Alves, C., 2019. "Emissions from residential pellet combustion of an invasive acacia species," Renewable Energy, Elsevier, vol. 140(C), pages 319-329.
    4. Ghorashi, Seyed Amin & Khandelwal, Bhupendra, 2023. "Toward the ultra-clean and highly efficient biomass-fired heaters. A review," Renewable Energy, Elsevier, vol. 205(C), pages 631-647.
    5. Elena Leoni & Thomas Gasperini & Nicolò Di Marzio & Rodolfo Picchio & Giuseppe Toscano & Daniele Duca, 2024. "Application of Near Infrared Spectroscopy for the Detection of Chemically Treated Pellets Unsuitable for Combustion," Energies, MDPI, vol. 17(4), pages 1-16, February.
    6. Vicente, E.D. & Vicente, A.M. & Evtyugina, M. & Tarelho, L.A.C. & Almeida, S.M. & Alves, C., 2020. "Emissions from residential combustion of certified and uncertified pellets," Renewable Energy, Elsevier, vol. 161(C), pages 1059-1071.

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