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An open absorption system installed at a sawmill

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  • Johansson, L
  • Westerlund, L

Abstract

This work describes a pilot plant and its different parts in a system used for bio-fuel drying and timber drying with an open absorption process. This technique has not been used previously in Sweden in this application. The open absorption system has been installed on four timber dryers and one bio-fuel dryer at a sawmill located in the northern part of Sweden. The annual energy demand for the dryers has decreased considerably. The specific heat demand for a conventional drying system is about 5970 kJ/kg of evaporated water. For the open absorption system the corresponding value is a heat demand of approximately 1400 kJ/kg of evaporated water. At the same time, an additional 360 kJ/kg of electricity has to be supplied. Here, 45 000 m3 per year of dried bio-fuel has been sold on the market as a result of the decreased heat demand in the wood dryers at the sawmill. The plant has been working well and has had a high availability. The pay-off time for the investment will be approximately 3 years for non-discounted cash-flows.

Suggested Citation

  • Johansson, L & Westerlund, L, 2000. "An open absorption system installed at a sawmill," Energy, Elsevier, vol. 25(11), pages 1067-1079.
    • Handle: RePEc:eee:energy:v:25:y:2000:i:11:p:1067-1079
    DOI: 10.1016/S0360-5442(00)00026-8
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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.
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    1. Danon, Gradimir & Furtula, Mladen & Mandić, Marija, 2012. "Possibilities of implementation of CHP (combined heat and power) in the wood industry in Serbia," Energy, Elsevier, vol. 48(1), pages 169-176.
    2. Anderson, Jan-Olof & Westerlund, Lars, 2011. "Surplus biomass through energy efficient kilns," Applied Energy, Elsevier, vol. 88(12), pages 4848-4853.
    3. Angelo Del Giudice & Andrea Acampora & Enrico Santangelo & Luigi Pari & Simone Bergonzoli & Ettore Guerriero & Francesco Petracchini & Marco Torre & Valerio Paolini & Francesco Gallucci, 2019. "Wood Chip Drying through the Using of a Mobile Rotary Dryer," Energies, MDPI, vol. 12(9), pages 1-16, April.
    4. Anderson, Jan-Olof & Westerlund, Lars, 2014. "Improved energy efficiency in sawmill drying system," Applied Energy, Elsevier, vol. 113(C), pages 891-901.
    5. Yang, Bo & Yuan, Weixing & Fu, Lin & Zhang, Shigang & Wei, Maolin & Guo, Dongcai, 2020. "Techno-economic study of full-open absorption heat pump applied to flue gas total heat recovery," Energy, Elsevier, vol. 190(C).

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