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Surplus biomass through energy efficient kilns

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  • Anderson, Jan-Olof
  • Westerlund, Lars

Abstract

The use of biomass in the European Union has increased since the middle of the 1990s, mostly because of high subsidies and CO2 emission regulation through the Kyoto protocol. The sawmills are huge biomass suppliers to the market; out of the Swedish annual lumber production of 16.4Mm3, 95% is produced by medium to large-volume sawmills with a lumber quotient of 47%. The remaining part is produced as biomass. An essential part (12%) of the entering timber is used for supply of heat in their production processes, mostly in the substantial drying process. The drying process is the most time and heat consuming process in the sawmill. This study was undertaken to determine the sawmills’ national use of energy and potential magnitude of improvements. If the drying process can be made more effective, sawmills’ own use of biomass can be decreased and allow a considerably larger supply to the biomass market through processed or unprocessed biomass, heat or electricity production. The national electricity and heat usage when drying the lumber have been analysed by theoretical evaluation and experimental validation at a batch kiln. The main conclusion is that the heat consumption for drying lumber among the Swedish sawmills is 4.9TWh/year, and with available state-of-the-art techniques it is possible to decrease the national heat consumption by approximately 2.9TWh. This additional amount of energy corresponds to the market’s desire for larger energy supply.

Suggested Citation

  • Anderson, Jan-Olof & Westerlund, Lars, 2011. "Surplus biomass through energy efficient kilns," Applied Energy, Elsevier, vol. 88(12), pages 4848-4853.
  • Handle: RePEc:eee:appene:v:88:y:2011:i:12:p:4848-4853
    DOI: 10.1016/j.apenergy.2011.06.027
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    References listed on IDEAS

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    1. Westerlund, L. & Dahl, J., 1994. "Absorbers in the open absorption system," Applied Energy, Elsevier, vol. 48(1), pages 33-49.
    2. Westerlund, L. & Dahl, J., 1991. "Open absorption system: Experimental study in a laboratory pilot plant," Applied Energy, Elsevier, vol. 38(3), pages 215-229.
    3. Johansson, L & Westerlund, L, 2000. "An open absorption system installed at a sawmill," Energy, Elsevier, vol. 25(11), pages 1067-1079.
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    Cited by:

    1. Anderson, Jan-Olof & Toffolo, Andrea, 2013. "Improving energy efficiency of sawmill industrial sites by integration with pellet and CHP plants," Applied Energy, Elsevier, vol. 111(C), pages 791-800.
    2. Nwachukwu, Chinedu M. & Toffolo, Andrea & Wetterlund, Elisabeth, 2020. "Biomass-based gas use in Swedish iron and steel industry – Supply chain and process integration considerations," Renewable Energy, Elsevier, vol. 146(C), pages 2797-2811.
    3. Anderson, Jan-Olof & Westerlund, Lars, 2014. "Improved energy efficiency in sawmill drying system," Applied Energy, Elsevier, vol. 113(C), pages 891-901.
    4. Martínez González, Aldemar & Lesme Jaén, René & Silva Lora, Electo Eduardo, 2020. "Thermodynamic assessment of the integrated gasification-power plant operating in the sawmill industry: An energy and exergy analysis," Renewable Energy, Elsevier, vol. 147(P1), pages 1151-1163.

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