Seib, Lukas ; Welsch, Bastian ; Bossennec, Claire ; Frey, Matthis ; Sass, Ingo (2025)
Finite element simulation of permeable fault influence on a medium deep borehole thermal energy storage system.
In: Geothermal Energy : Science – Society – Technology, 2022, 10 (1)
doi: 10.26083/tuprints-00028751
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
Solutions for seasonal energy storage systems are essential for the reliable use of fluctuating renewable energy sources. As part of the research project SKEWS, a medium deep borehole thermal energy storage system with a depth of 750 m is under construction at Campus Lichtwiese in Darmstadt, Germany, to demonstrate this innovative technology. Prior to the design of SKEWS, the geological context in the surroundings of the project location was investigated using archive drilling data and groundwater measurements. The geologic survey suggests the assumption that the uppermost part of the intended storage domain is crosscut by a normal fault, which displaces the Permian rocks east of Darmstadt against granodioritic rocks of the Odenwald crystalline complex. A 3D finite-element numerical model was implemented to estimate the effect of the potentially higher hydraulic conductivity of the fault zone on the planned storage system. For this purpose, a storage operation over a time span of 30 years was simulated for different parametrizations of the fault zone. The simulations reveal a limited but visible heat removal from the storage region with increasing groundwater flow in the fault zone. However, the section of the borehole thermal energy storage system affected by the fault is minor compared to the total depth of the system. This only constitutes a minor impairment of the storage efficiency of approximately 3%. In total, the amount of heat extracted varies between 320.2 GWh and 326.2 GWh for the different models. These findings can be helpful for the planning and assessment of future medium deep borehole thermal energy storage systems in fractured and faulted crystalline settings by providing data about the potential impact of faults or large fractures crosscutting the storage system.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2025 |
| Autor(en): | Seib, Lukas ; Welsch, Bastian ; Bossennec, Claire ; Frey, Matthis ; Sass, Ingo |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Finite element simulation of permeable fault influence on a medium deep borehole thermal energy storage system |
| Sprache: | Englisch |
| Publikationsjahr: | 14 Januar 2025 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 7 September 2022 |
| Ort der Erstveröffentlichung: | Berlin ; Heidelberg |
| Verlag: | SpringerOpen |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Geothermal Energy : Science – Society – Technology |
| Jahrgang/Volume einer Zeitschrift: | 10 |
| (Heft-)Nummer: | 1 |
| Kollation: | 21 Seiten |
| DOI: | 10.26083/tuprints-00028751 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/28751 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Solutions for seasonal energy storage systems are essential for the reliable use of fluctuating renewable energy sources. As part of the research project SKEWS, a medium deep borehole thermal energy storage system with a depth of 750 m is under construction at Campus Lichtwiese in Darmstadt, Germany, to demonstrate this innovative technology. Prior to the design of SKEWS, the geological context in the surroundings of the project location was investigated using archive drilling data and groundwater measurements. The geologic survey suggests the assumption that the uppermost part of the intended storage domain is crosscut by a normal fault, which displaces the Permian rocks east of Darmstadt against granodioritic rocks of the Odenwald crystalline complex. A 3D finite-element numerical model was implemented to estimate the effect of the potentially higher hydraulic conductivity of the fault zone on the planned storage system. For this purpose, a storage operation over a time span of 30 years was simulated for different parametrizations of the fault zone. The simulations reveal a limited but visible heat removal from the storage region with increasing groundwater flow in the fault zone. However, the section of the borehole thermal energy storage system affected by the fault is minor compared to the total depth of the system. This only constitutes a minor impairment of the storage efficiency of approximately 3%. In total, the amount of heat extracted varies between 320.2 GWh and 326.2 GWh for the different models. These findings can be helpful for the planning and assessment of future medium deep borehole thermal energy storage systems in fractured and faulted crystalline settings by providing data about the potential impact of faults or large fractures crosscutting the storage system. |
| Freie Schlagworte: | Medium deep-BTES, Fault permeability, Basement rock, FE-model |
| ID-Nummer: | Artikel-ID: 15 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-287514 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Angewandte Geothermie Exzellenzinitiative Exzellenzinitiative > Graduiertenschulen Exzellenzinitiative > Graduiertenschulen > Graduate School of Energy Science and Engineering (ESE) |
| Hinterlegungsdatum: | 14 Jan 2025 09:37 |
| Letzte Änderung: | 15 Jan 2025 06:10 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Finite element simulation of permeable fault influence on a medium deep borehole thermal energy storage system. (deposited 14 Jan 2025 09:37) [Gegenwärtig angezeigt]
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