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Coproduction of district heat and electricity or biomotor fuels
Linnaeus Univ, S-35195 Vaxjo, Sweden..
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering and Sustainable Development. (Ecotechnology)
2011 (English)In: Energy, ISSN 0360-5442, Vol. 36, no 10, 6263-6277 p.Article in journal (Refereed) Published
Abstract [en]

The operation of a district heating system depends on the heat load demand, which varies throughout the year. In this paper, we analyze the coproduction of district heat and electricity or biomotor fuels. We demonstrate how three different taxation scenarios and two crude oil price levels influence the selection of production units to minimize the district heat production cost and calculate the resulting primary energy use. Our analysis is based on the annual measured heat load of a district heating system. The minimum-cost district heat production system comprises different production units that meet the district heat demand and simultaneously minimize the district heat production cost. First, we optimize the cost of a district heat production system based on the cogeneration of electricity and heat with and without biomass integrated gasification combined-cycle technology. We considered cogenerated electricity as a byproduct with the value of that produced by a condensing power plant. Next, we integrate and optimize different biomotor fuel production units into the district heat production system by considering biomotor fuels as byproducts that can substitute for fossil motor fuels. We demonstrate that in district heating systems, the strengthening of environmental taxation reduces the dependence on fossil fuels. However, increases in environmental taxation and the crude oil price do not necessarily influence the production cost of district heat as long as biomass price is not driven by policy measures. Biomotor fuel production in a district heating system is typically not cost-efficient. The biomotor fuels produced from the district heating system have to compete with those from standalone biomotor fuel plants and also with its fossil-based counterparts. This is also true for high oil prices. A carbon tax on fossil CO2 emissions based on social cost damage will increase the competitiveness of biomass-based combined heat and power plants, especially for BIGCC technology with its high electricity-to-heat ratio.

Place, publisher, year, edition, pages
2011. Vol. 36, no 10, 6263-6277 p.
Keyword [en]
Biomotor fuels; Coproduction; District heat production; Environmental taxations; Minimum-cost system; Primary energy
National Category
Environmental Engineering
Identifiers
URN: urn:nbn:se:miun:diva-14442DOI: 10.1016/j.energy.2011.07.021ISI: 000296683400050Scopus ID: 2-s2.0-80053453259OAI: oai:DiVA.org:miun-14442DiVA: diva2:438655
Available from: 2011-09-05 Created: 2011-09-05 Last updated: 2012-01-20Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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