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Urban Sustainability: Recovering and Utilizing Urban Excess Heat

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  • Kristina Lygnerud

    (IVL Swedish Environmental Research Institute, SE-400 14 Göteborg, Sweden
    Department of Energy Sciences, Efficient Energy Systems, Faculty of Engineering LTH, Lund University, SE-221 00 Lund, Sweden)

  • Sarka Langer

    (IVL Swedish Environmental Research Institute, SE-400 14 Göteborg, Sweden)

Abstract

Urban heat sources from urban infrastructure and buildings could meet ~10% of the European building heating demand. There is, however, limited information on how to use them. The EU project ReUseHeat has generated much of the existing knowledge on urban waste heat recovery implementation. Heat recovery from a data center, hospital and from water were demonstrated. Additionally, the project generated knowledge of stakeholders, risk profile, bankability and business models. The recovery of urban waste heat is characterized by high potential, high competitiveness compared to other heating alternatives, high avoidance of GHG emissions, payback within three years and low utilization. These characteristics reveal that barriers for increased utilization exist. The barriers are not technical. Instead, the absence of a waste heat EU level policy adds risk. Other showstoppers are low knowledge on the urban waste heat opportunity and new stakeholder relationships being needed for successful recovery. By combining key results and lessons learned from the project this article outlines the frontier of urban waste heat recovery research and practice in 2022.

Suggested Citation

  • Kristina Lygnerud & Sarka Langer, 2022. "Urban Sustainability: Recovering and Utilizing Urban Excess Heat," Energies, MDPI, vol. 15(24), pages 1-11, December.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:24:p:9466-:d:1002783
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    References listed on IDEAS

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