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Increased cogeneration of renewable electricity through energy cooperation in a Swedish district heating system - A case study
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system. Department of Management and Engineering, Division of Energy Systems, Linköping University, Linköping, Sweden.
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.ORCID iD: 0000-0001-5574-8372
2018 (English)In: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 116, 866-877 p.Article in journal (Refereed) Published
Abstract [en]

The present study of the district heating (DH) system in the city of Kisa, Sweden, shows how, through energy cooperation with a nearby sawmill and paper mill, a local energy company contributes to energy-efficient DH and cost-effective utilization of a new biofuel combined heat and power (CHP) plant. Cases of stand-alone and integrated energy systems are optimized with the linear program MODEST. The European power market is assumed to be fully deregulated. The results show clear advantages for the energy company to cooperate with these industries to produce heat for DH and process steam for industry. The cooperating industries gain advantages from heat and/or biofuel by-product supply as well. The opening to use a biofuel CHP plant for combined heat supply results in cogenerated electricity of almost 29 GWh/a with an increased biofuel use of 13 GWh/a, zero fuel oil use and CO2 emission reductions of 25,800 tons CO2/a with coal-condensing power plant on the margin and biofuel as limited resource. The total system cost decreases by −2.18 MEUR/a through extended cooperation and renewable electricity sales. The sensitivity analysis shows that the profitability of investing in a biofuel CHP plant increases with higher electricity and electricity certificate prices.

Place, publisher, year, edition, pages
2018. Vol. 116, 866-877 p.
Keyword [en]
Renewable electricity; Biofuel; Energy cooperation; District heating; CHP; CO2 emission
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:hig:diva-25460DOI: 10.1016/j.renene.2017.10.003ISI: 000416188200077Scopus ID: 2-s2.0-85031893536OAI: oai:DiVA.org:hig-25460DiVA: diva2:1152565
Projects
A project for development of Sustainable Clean Wood Energy in the Central Baltic region
Note

Funding agencies:

Östergötland County Administrative Board  grant no. 304-1677-2012

Linköping University  

University of Gävle  

Available from: 2017-10-25 Created: 2017-10-25 Last updated: 2017-12-12Bibliographically approved

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