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Statistical model to reproduce the combustion behavior of domestic-scale wood pellets burners
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology.
Linnaeus University, Faculty of Technology, Department of Built Environment and Energy Technology. (Bioenergy)
2016 (English)In: Proceedings of the 24th European Biomass Conference: Setting the course for a biobased economy, ETA-Florence Renewable Energies , 2016, 666-673 p.Conference paper, Published paper (Refereed)
Abstract [en]

A simplified statistical model was developed to simulate the combustion behavior in wood pellets burners based on the eddy dissipation concept and the assumption that the turbulence to some extents can be treated in a similar way in both the larger scales and the smaller scales. The combustion system was divided into several macroscopic sub-volumes which were characterized by plug flow function with axial diffusion that helps to bridge the geometry with the mixing status and describe the dissipation of turbulence by means of digital filter. Initially a time series of fuel-air mixture was defined according to feedstock and air supply in burner and then successively modified in the following sub-volumes based on the predefined function and additional air. With favor of mass and energy balance the final gas composition can be approximately distributed by water gas equilibrium. After involved the system response of gas analysis instrumentation, the modelled results were compared with experimental tests in two commercialized types of pellet burners, named gasification type and combustion type respectively. The model predicted reasonably the over-all behavior of domestic-scale pellet burners on the mean value and standard deviation of gas compositions, especially the behavior of CO2 and O2 in both cases. The CO emission was simulated unstably but within an acceptable range. This model can be used as an on-line predictor in combustion control systems and may thus serve as a tool for fast-response combustion control. 

Place, publisher, year, edition, pages
ETA-Florence Renewable Energies , 2016. 666-673 p.
Series
European Biomass Conference and Exhibition Proceedings, ISSN 2282-5819
Keyword [en]
biomass, combustion, control systems, gasification, modelling, pellets
National Category
Bioenergy
Research subject
Technology (byts ev till Engineering), Bioenergy Technology
Identifiers
URN: urn:nbn:se:lnu:diva-58153DOI: 10.5071/24thEUBCE2016-2BV.1.22ISBN: 978-88-89407-165 (print)OAI: oai:DiVA.org:lnu-58153DiVA: diva2:1047113
Conference
24th European Biomass conference and Exhibition, 6-9 June, Amsterdam
Available from: 2016-11-16 Created: 2016-11-16 Last updated: 2016-11-22Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf