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Open AccessArticle

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

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Chair of Energy Network Technology, Montanuniversitaet Leoben, Franz-Josef Straße 18, A-8700 Leoben, Austria
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HyCentA Research GmbH, Inffeldgasse 15, A-8010 Graz, Austria
*
Author to whom correspondence should be addressed.
Energies 2020, 13(4), 843; https://doi.org/10.3390/en13040843 (registering DOI)
Received: 20 December 2019 / Revised: 5 February 2020 / Accepted: 10 February 2020 / Published: 14 February 2020
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.
Keywords: exergy; efficient energy systems; spatially resolved comparison; renewable energy sources; potential; total energy consumption; primary energy consumption; energy system planning; Austria-wide comparison exergy; efficient energy systems; spatially resolved comparison; renewable energy sources; potential; total energy consumption; primary energy consumption; energy system planning; Austria-wide comparison
MDPI and ACS Style

Sejkora, C.; Kühberger, L.; Radner, F.; Trattner, A.; Kienberger, T. 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 2020, 13, 843.

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