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System effects of lowered district heating supply temperatures
School of Technology and Business Studies, Dalarna University, Sweden; Department of Building Engineering, Energy Systems and Sustainability Science, University of Gävle, Swede.
Department of Applied Physics and Electronics, Umeå University, Sweden.
Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-2860-1820
2020 (English)In: Energy, ISSN 2059-2353Article in journal (Refereed) Published
Sustainable development
Climate Improvements
Abstract [en]

Lowering temperature levels of a district heating (DH) system may offer several advantages such as reduced distribution losses, increased efficiency of flue gas condensation equipment and increased electricity generation in combined heat and power plants. In a broader perspective this can result in more efficient use of natural resources as well as reduced climate impacting emissions. This study examines how decreased DH supply temperatures influence the power to heat ratio and thereby electricity production and fuel use in a combined heat and power plant. Carbon dioxide equivalent (CO2-eqv.) emissions and primary energy use were calculated with three different marginal electricity perspectives. A regional DH system situated in mid Sweden was used as a case study and the energy system cost optimization modelling tool MODEST (Model for Optimization of Dynamic Energy Systems with Time Dependent Components and Boundary Conditions) was used. The results show that decreasing the DH supply temperature results in increased electricity production as well as increased fuel use within the system. Further, there is a significant difference in CO2-eqv. emissions and primary energy use for the studied marginal electricity perspectives.

Place, publisher, year, edition, pages
2020.
Keywords [en]
District Heating System; Low-temperature District Heating; Combined Heat and Power; CO2-eqv. Emissions; Primary Energy
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:liu:diva-173289DOI: 10.32438/WPE.0920OAI: oai:DiVA.org:liu-173289DiVA, id: diva2:1528029
Available from: 2021-02-12 Created: 2021-02-12 Last updated: 2021-02-18Bibliographically approved

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Ödlund, Louise

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf