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Mapping Local Synergies: Spatio-Temporal Analysis of Switzerland’s Waste Heat Potentials vs. Heat Demand

Author

Listed:
  • Vanessa Burg

    (Institute of Environmental Engineering, Swiss Federal Institute of Technology Zürich (ETH Zürich), John-von-Neumann-Weg 9, CH-8093 Zürich, Switzerland)

  • Florent Richardet

    (Institute of Environmental Engineering, Swiss Federal Institute of Technology Zürich (ETH Zürich), John-von-Neumann-Weg 9, CH-8093 Zürich, Switzerland)

  • Severin Wälty

    (Institute of Environmental Engineering, Swiss Federal Institute of Technology Zürich (ETH Zürich), John-von-Neumann-Weg 9, CH-8093 Zürich, Switzerland)

  • Ramin Roshandel

    (Department of Energy Engineering, Sharif University of Technology, Azadi Avenue, Tehran P.O. Box 11365-9567, Iran)

  • Stefanie Hellweg

    (Institute of Environmental Engineering, Swiss Federal Institute of Technology Zürich (ETH Zürich), John-von-Neumann-Weg 9, CH-8093 Zürich, Switzerland)

Abstract

As nations transition to renewable energy, making use of waste heat becomes crucial to combat climate change. This study focused on quantifying Switzerland’s waste heat potential from industrial processes and waste-to-energy facilities, using diverse methodologies tailored to facility characteristics and data availability. We assessed potential waste heat utilization by comparing local heat supply and demand, creating comprehensive heat-balance maps considering different temperature levels and seasonal fluctuations. Results revealed a substantial annual waste heat potential of 37 TWh, with almost half (17 TWh) below 45 °C, primarily from wastewater. Heat between 45 °C and 70 °C, ideal, e.g., for greenhouse heating, is mainly available from solid waste incineration plants, while industries contributed to waste heat supply exceeding 150 °C. In contrast to heat demand, seasonal variations in heat supply were small, with a 12% winter decrease. Analyzing heat demand versus supply unveiled local and seasonal disparities. Most municipalities had a net excess heat demand (totaling 89 TWh). Additionally, waste heat could not satisfy 8 TWh of industrial process heat demand exceeding 400 °C, emphasizing reliance on primary energy sources for higher-temperature heat. Targeted strategies are essential for effective waste heat utilization, especially tapping into low-temperature sources. Integrating these sources with low-carbon technologies can pave the way to a sustainable energy future.

Suggested Citation

  • Vanessa Burg & Florent Richardet & Severin Wälty & Ramin Roshandel & Stefanie Hellweg, 2023. "Mapping Local Synergies: Spatio-Temporal Analysis of Switzerland’s Waste Heat Potentials vs. Heat Demand," Energies, MDPI, vol. 17(1), pages 1-21, December.
    • Handle: RePEc:gam:jeners:v:17:y:2023:i:1:p:106-:d:1306666
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    References listed on IDEAS

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