THERMAL SCIENCE

International Scientific Journal

IMPACT OF FUEL QUALITY AND BURNER CAPACITY ON THE PERFORMANCE OF WOOD PELLET STOVE

ABSTRACT
Pellet stoves may play an important role in Serbia in the future when fossil fuel fired conventional heating appliances are replaced by more efficient and environmentally friendly devices. Experimental investigation was conducted in order to examine the influence of wood pellet quality, as well as burner capacity (6, 8 and 10 kW), used in the same stove configuration, on the performance of pellet stove with declared nameplate capacity of 8 kW. The results obtained showed that in case of nominal load and combustion of pellets recommended by the stove manufacturer, stove efficiency of 80.03% was achieved. The use of lower quality pellet caused additional 1.13 kW reduction in heat output in case of nominal load and 0.63 kW in case of reduced load. This was attributed to less favourable properties and lower bulk and particle density of lower quality pellet. The use of different burner capacity has shown to have little effect on heat output and efficiency of the stove when pre-set values in the control system of the stove were not altered. It is concluded that replacement of the burner only is not sufficient to increase/decrease the declared capacity of the same stove configuration, meaning that additional measures are necessary. These measures include a new set up of the stove control system, which needs to be properly adjusted for each alteration in stove configuration. Without the adjustment mentioned, declared capacity of the stove cannot be altered, while its CO emission shall be considerably increased.
KEYWORDS
PAPER SUBMITTED: 2015-03-10
PAPER REVISED: 2015-05-06
PAPER ACCEPTED: 2015-05-06
PUBLISHED ONLINE: 2015-06-07
DOI REFERENCE: https://doi.org/10.2298/TSCI150310082P
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE 5, PAGES [1855 - 1866]
REFERENCES
  1. ***, European Renewable Energy Council (EREC), Renewable Energy in Europe - Markets, Trends and Technologies, Publication Office of the European Union, Luxemburg, 2010
  2. Klaus T., Vollmer C., Werner K., Lehmann, H., Müschen K., Energy target 2050:100% renewable electricity supply, Federal Environment Agency Germany, 2011
  3. Comparative overview of the number of population in 1948, 1953, 1961, 1971, 1981, 1991, 2002 and 2011, Statistical Office of the Republic of Serbia, 2014, ISBN978-86-6161-109-4.
  4. ***, Energy balances of the Republic of Serbia for 2014, Official Gazette of RS, No. 115/13
  5. ***, Eurostat, epp.eurostat.ec.europa.eu/portal/page/portal/statistics/search_database, data retrieved in September 2014
  6. ***, Draft Serbian Energy Sector Development Strategy until 2025, with projections until 2030, www.srbija.gov.rs/vesti/dokumenti_sekcija.php?id=45678, data retrieved in September 2014
  7. Perakis C. at al., Biomass potential for future investments in Serbia, Proceedings,19th European Biomass Conference and Exhibition - From Research to Industry and Markets, Berlin, Germany, 2011
  8. Glavonjic B. at al., Wood pellets market in Serbia - production and opportunities for utilization, 19th European Biomass Conference and Exhibition - From Research to Industry and Markets - Proceedings, Berlin, Germany, 2011
  9. Glavonjic B., Consumption of Wood Fuels in Households in Serbia - Present state and possible contribution to the climate change mitigation, Thermal Science, 15 (2011), 3, pp. 571-585
  10. ***, Biomass Action Plan for the Republic of Serbia 2010-2012, Official Gazette of RS, No. 56/2010
  11. ***, Renewable Energy National Action Plan, Official Gazette of RS, No. 53/2013, 2013
  12. Fiedler F., The state of the art of small-scale pellet-based heating systems and relevant regulations in Sweden, Austria and Germany, Renewable and Sustainable Energy Reviews,8 (2004), pp. 201-221
  13. Dias J., et al., Test of a small domestic boiler using different pellets, Biomass and Bioenergy, 27 (2004), pp. 531-539
  14. Pellet Vinterback J., The first world conference on pellets, Biomass and Bioenergy, 27 (2004); pp. 513-520
  15. A. Garcia-Maraveret al., Relationship between fuel quality and gaseous and particulate matter emissions in a domestic pellet-fired boiler, Fuel, 119 (2014), pp. 141-152
  16. Arranz, J.I., et al., Characterization and combustion behaviour of commercial and experimental wood pellets in South West Europe, Fuel, 142 (2015), pp. 199-207
  17. Kristensen E.F., Kristensen J.K., Development and test of small scale batch-fired straw boilers in Denmark, Biomass and Bioenergy, 26 (2004), pp. 561-569
  18. Eskilsson D, M., et al., Optimisation of efficiency and emissions in pellet burners, Biomass and Bioenergy, 27 (2004), pp. 541-546
  19. Limousy L. et al., Gaseous products and particulate matter emissions of biomass residential boiler fired with spent coffee grounds pellets, Fuel, 107 (2013), pp. 323-329
  20. Bafver, L.S. et al., Particle emissions from pellet stoves and modern and old-type wood stoves, Biomass and Bioenergy, 35 (2011), pp. 3648-3655
  21. Míguez J.L.et al., Review of technology in small-scale biomass combustion systems in the European market, Renewable and Sustainable Energy Reviews, 16 (2012), pp.3867- 3875
  22. Qiu G., Testing of flue gas emissions of a biomass pellet boiler and abatement of particle emissions, Renewable Energy, 50 (2013), pp. 94-102
  23. Boman C., et al., Emissions from small-scale combustion of biomass fuels - extensive quantification and characterization, Energy Technology and Thermal Process Chemistry, Umea University, Arrhenius Laboratory, Stockholm University, 2005
  24. Luisser M., Schmidl C., Emissions from Small Scale Pellets Stoves and Boilers, Proceedings, Australian Combustion Symposium, Sidney, Australia, 2007
  25. Schmidl C.et al., Particulate and gaseous emissions from manually and automatically fired small scale combustion systems, Atmospheric Environment, 45 (2011), pp. 7443-7454
  26. Kistler M. et al., Odor, gaseous and PM10 emissions from small scale combustion of wood types indigenous to Central Europe, Atmospheric Environment, 51 (2012), pp. 86-93
  27. Petrocelli D., Lezzi A. M., CO and NO emissions from pellet stoves: an experimental study, Journal of Physics: Conference Series, 501 (2014), pp.165-1712
  28. Carvalho R. L. T., et al., Energy performance of Portuguese and Danish wood-burning stoves, Proceedings, World Renewable Energy Congress, Linköping, Sweden, 2011, Vol. 3, pp. 92-100
  29. Moran J.C., et al., Experimental modelling of a pilot lingocellulosic pellets stove plant, Biomass and Bioenergy, 27 (2004), pp. 577-583
  30. ONORM EN 14785:2006, Residential space heating appliances fired by wood pellets - Requirements and test methods, Austrian Standards Institute, Wien, 2006
  31. Manić, N., Optimisation and modelling of biomass pellet combustion in small scale pellet stove for household heating, Ph.D. thesis, University of Belgrade, Belgrade, Serbia, 2011
  32. ONORM EN 14961:2010 - Part 2, Solid biofuels - Fuel specifications and classes - Part 2: Wood pellets for non-industrial use, Austrian Standards Institute, Wien, 2010.

© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, 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