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Exergy as Criteria for Efficient Energy Systems—A Spatially Resolved Comparison of the Current Exergy Consumption, the Current Useful Exergy Demand and Renewable Exergy Potential

Author

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  • Christoph Sejkora

    (Chair of Energy Network Technology, Montanuniversitaet Leoben, Franz-Josef Straße 18, A-8700 Leoben, Austria)

  • Lisa Kühberger

    (Chair of Energy Network Technology, Montanuniversitaet Leoben, Franz-Josef Straße 18, A-8700 Leoben, Austria)

  • Fabian Radner

    (HyCentA Research GmbH, Inffeldgasse 15, A-8010 Graz, Austria)

  • Alexander Trattner

    (HyCentA Research GmbH, Inffeldgasse 15, A-8010 Graz, Austria)

  • Thomas Kienberger

    (Chair of Energy Network Technology, Montanuniversitaet Leoben, Franz-Josef Straße 18, A-8700 Leoben, Austria)

Abstract

The energy transition from fossil-based energy sources to renewable energy sources of an industrialized country is a big challenge and needs major systemic changes to the energy supply. Such changes require a holistic view of the energy system, which includes both renewable potentials and consumption. Thereby exergy, which describes the quality of energy, must also be considered. In this work, the determination and analysis of such a holistic view of a country are presented, using Austria as an example. The methodology enables the calculation of the spatially resolved current exergy consumption, the spatially resolved current useful exergy demand and the spatially resolved technical potential of renewable energy sources (RES). Top-down and bottom-up approaches are combined in order to increase accuracy. We found that, currently, Austria cannot self-supply with exergy using only RES. Therefore, Austria should increase the efficiency of its energy system, since the overall exergy efficiency is only at 34%. The spatially resolved analysis shows that in Austria the exergy potential of RES is rather evenly distributed. In contrast, the exergy consumption is concentrated in urban and industrial areas. Therefore, the future energy infrastructure must compensate for these spatial discrepancies.

Suggested Citation

  • Christoph Sejkora & Lisa Kühberger & Fabian Radner & Alexander Trattner & Thomas Kienberger, 2020. "Exergy as Criteria for Efficient Energy Systems—A Spatially Resolved Comparison of the Current Exergy Consumption, the Current Useful Exergy Demand and Renewable Exergy Potential," Energies, MDPI, vol. 13(4), pages 1-51, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:4:p:843-:d:320811
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    Cited by:

    1. Lukas Kriechbaum & Philipp Gradl & Romeo Reichenhauser & Thomas Kienberger, 2020. "Modelling Grid Constraints in a Multi-Energy Municipal Energy System Using Cumulative Exergy Consumption Minimisation," Energies, MDPI, vol. 13(15), pages 1-23, July.
    2. Matthias Greiml & Florian Fritz & Josef Steinegger & Theresa Schlömicher & Nicholas Wolf Williams & Negar Zaghi & Thomas Kienberger, 2022. "Modelling and Simulation/Optimization of Austria’s National Multi-Energy System with a High Degree of Spatial and Temporal Resolution," Energies, MDPI, vol. 15(10), pages 1-33, May.
    3. Robert Gaugl & Mark Sommer & Claudia Kettner & Udo Bachhiesl & Thomas Florian Klatzer & Lia Gruber & Michael Böheim & Kurt Kratena & Sonja Wogrin, 2023. "Integrated Power and Economic Analysis of Austria's Renewable Electricity Transformation," WIFO Working Papers 657, WIFO.
    4. Christoph Sejkora & Johannes Lindorfer & Lisa Kühberger & Thomas Kienberger, 2021. "Interlinking the Renewable Electricity and Gas Sectors: A Techno-Economic Case Study for Austria," Energies, MDPI, vol. 14(19), pages 1-38, October.
    5. Sejkora, Christoph & Kühberger, Lisa & Radner, Fabian & Trattner, Alexander & Kienberger, Thomas, 2022. "Exergy as criteria for efficient energy systems – Maximising energy efficiency from resource to energy service, an Austrian case study," Energy, Elsevier, vol. 239(PC).
    6. Greiml, Matthias & Fritz, Florian & Kienberger, Thomas, 2021. "Increasing installable photovoltaic power by implementing power-to-gas as electricity grid relief – A techno-economic assessment," Energy, Elsevier, vol. 235(C).
    7. Claudia Kettner & Michael Böheim & Mark Sommer & Robert Gaugl & Udo Bachhiesl & Lia Gruber & Thomas Florian Klatzer & Sonja Wogrin & Kurt Kratena, 2023. "Transformation to a Renewable Electricity System in Austria. Insights from an Integrated Model Analysis," WIFO Working Papers 658, WIFO.

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