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Modelling environmental and energy system impacts of large-scale excess heat utilisation – A regional case study

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  • Sandvall, Akram Fakhri
  • Börjesson, Martin
  • Ekvall, Tomas
  • Ahlgren, Erik O.

Abstract

EH (excess heat) is an important, but yet partially unused, source for DH (district heating). This study analyses energy system and CO2 emission impacts at a regional scale of integration of EH from a large chemical cluster and local DH systems. The assessment is carried out with the optimising energy systems model MARKAL_WS, in which the DH systems in the Västra Götaland region of Sweden are represented individually. In addition, options for transport biofuel production are included. The results show that the connection contributes to a reduction of biomass and fossil fuel use, and to a related reduction of CO2 emissions, in the DH systems. This opens opportunities for earlier production of transport biofuels but instead electricity generation from combined heat and power plants in the region decreases. In the short term, total CO2 emissions increase if an expanded systems view is applied in which effects on the DH systems, transport system and European electricity system are accounted for, while in the mid-term they decrease. The study is based on a case and due to the diversity of Swedish DH systems in terms of use of fuels and local available resources, a generalisation of the results is not straightforward.

Suggested Citation

  • Sandvall, Akram Fakhri & Börjesson, Martin & Ekvall, Tomas & Ahlgren, Erik O., 2015. "Modelling environmental and energy system impacts of large-scale excess heat utilisation – A regional case study," Energy, Elsevier, vol. 79(C), pages 68-79.
    • Handle: RePEc:eee:energy:v:79:y:2015:i:c:p:68-79
    DOI: 10.1016/j.energy.2014.10.049
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    5. Werner, Sven, 2017. "District heating and cooling in Sweden," Energy, Elsevier, vol. 126(C), pages 419-429.
    6. Sandvall, Akram Fakhri & Ahlgren, Erik O. & Ekvall, Tomas, 2017. "Low-energy buildings heat supply–Modelling of energy systems and carbon emissions impacts," Energy Policy, Elsevier, vol. 111(C), pages 371-382.
    7. Igor Cruz & Magnus Wallén & Elin Svensson & Simon Harvey, 2021. "Electricity Generation from Low and Medium Temperature Industrial Excess Heat in the Kraft Pulp and Paper Industry," Energies, MDPI, vol. 14(24), pages 1-27, December.
    8. Borna Doračić & Tomislav Novosel & Tomislav Pukšec & Neven Duić, 2018. "Evaluation of Excess Heat Utilization in District Heating Systems by Implementing Levelized Cost of Excess Heat," Energies, MDPI, vol. 11(3), pages 1-14, March.
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    10. Weinberger, Gottfried & Amiri, Shahnaz & Moshfegh, Bahram, 2017. "On the benefit of integration of a district heating system with industrial excess heat: An economic and environmental analysis," Applied Energy, Elsevier, vol. 191(C), pages 454-468.
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