THERMAL SCIENCE

International Scientific Journal

Lars B. Westerlund

,

Roger L. Hermansson

,

Michel J. Cervantes

CFD OPTIMIZATION OF A PELLET BURNER

ABSTRACT
Increased capacity of computers has made CFD technology attractive for the design of different apparatuses. Optimization of a pellet burner using CFD was investigated in this paper. To make the design tool work fast, an approach with only mixing of gases was simulated. Other important phenomena such as chemical reactions were omitted in order to speed up the design process. The original design of the burner gave unsatisfactory performance. The optimized design achieved from simulation was validated and the results show a significant improvement. The power output increased and the emission of unburned species decreased but could be further reduced. The contact time between combustion gases and secondary air was probably too short. An increased contact time in high temperature conditions would possibly improve the design further.
KEYWORDS
CFD, combustion, design, optimisation, Pellet burner
PAPER SUBMITTED: 2011-06-09
PAPER REVISED: 2011-10-24
PAPER ACCEPTED: 2011-10-26
DOI REFERENCE: https://doi.org/10.2298/TSCI110609135W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2012, VOLUME 16, ISSUE Issue 4, PAGES [1175 - 1186]
REFERENCES
  1. Hirsmark J., 2002, Densified Biomass Fuels in Sweden-Country report for the EU/INDEF project, Department of Forest Management and products, Swedish University of Agriculture Science, Uppsala
  2. Mani S., Sokhansanj S., Bi X. & Turhollow a., 2006, Economics of Producing Fuel Pellets from Biomass, American Society of Agriculture and Biological Engineers
  3. Höglund J, 2008, The Swedish fuel pellets industry; Production , market and standardization, Department of Forest Management and products, Swedish University of Agriculture Science, Uppsala
  4. Rönnböck M., Johansson M., Claesson F., 2008, ERA-Net Utvärdering av utvecklingsstatus för småskalig förbränning av pellets från nya askrika råvaror, SP-rapport 2008:31, SP-Technical Research Institute of Sweden, Borås
  5. Porsö C., The effect of new raw materials on pellets prices. Examensarbete 2010:01, SLU, Swedish University of Agriculture Science, Uppsala, Sweden.
  6. Jordan C, Harasek M. Improvement of a Combustion Unit Based on a Grate Furnace for Granular Dry Solid Biofuels Using CFD Methods. Heat Transfer Engineering 2010; 31(9): pp. 774-781.
  7. Porteiro J, Collazo J, Patiño D, Granada E, Gonzalez JCM, Míguez JL. Numerical Modeling of a Biomass Pellet Domestic Boiler. Energy & Fuels 2009; 23: pp. 1067-1075.
  8. Wang Y, Yan L. CFD Studies on Biomass Thermochemical Conversion. Int. J. Mol. Sci 2008; 9: pp. 1108-1130.
  9. Klason T, Bai XS. Computational study of the combustion process and NO formation in a smallscale wood pellet furnace. Fuel 2007; 86: PP 1465-1474.
  10. Brage Norin: STEM Rapport 21310 - Etapp 2; Brännare för askrika bränslen.
  11. FlueGas, commersial software sold by MM EnviLoop AB.
  12. Cengel YA, Turner RH. Fundamentals of Thermal-Fluid Sciences. New York: McGraw-Hill; 2001.
  13. ANSYS FLUENT (2009). Ansys Fluent 12.0 user guide, ANSYS Inc.
  14. Haywood JB: Internal Combustion Engine Fundamentals. McGraw-Hill. ISBN 0-07-028637-X
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CFD optimization of a pellet burner

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence