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| Titel |
Estimation of the sustainable geothermal potential of Vienna |
| VerfasserIn |
Carolin Tissen, Susanne A. Benz, Christiane A. Keck, Peter Bayer, Philipp Blum |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250149709
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| Publikation (Nr.) |
 EGU/EGU2017-14086.pdf |
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| Zusammenfassung |
| Regarding the limited availability of fossil fuels and the absolute necessity to reduce CO2
emissions in order to mitigate the worldwide climate change, renewable resources and new
energy systems are required to provide sustainable energy for the future. Shallow geothermal
energy holds a huge untapped potential especially for heating and hot water, which represent
up to 50% of the global energy demand. Previous studies quantified the capacity of shallow
geothermal energy for closed and open systems in cities such as Vienna, London
(Westminster) and Ludwigsburg in Germany.
In the present study, these approaches are combined and also include the anthropogenic
heat input by the urban heat island (UHI) effect. The objective of the present study is
therefore to estimate the sustainable geothermal potential of Vienna. Furthermore, the amount
of energy demand for heating and hot water that can be supplied by open and closed
geothermal systems will be determined.
The UHI effect in Vienna is reflected in higher ground water temperatures within the city
centre (14 ˚ C to 18 ˚ C) in comparison to lower ones in rural areas (10 ˚ C to 13 ˚ C). A
preliminary estimation of the anthropogenic heat flow into the ground water caused by
elevated basement temperatures and land surface temperatures is 3,5 × 108 kWh/a.
This additional heat flow leads to a total geothermal potential which is 2.5 times
larger than the estimated annual energy demand for heating and hot water in Vienna. |
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