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
Article, Secondary publication, Publisher's Version
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Item Type: | Article |
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Type of entry: | Secondary publication |
Title: | Finite element simulation of permeable fault influence on a medium deep borehole thermal energy storage system |
Language: | English |
Date: | 14 January 2025 |
Place of Publication: | Darmstadt |
Year of primary publication: | 7 September 2022 |
Place of primary publication: | Berlin ; Heidelberg |
Publisher: | SpringerOpen |
Journal or Publication Title: | Geothermal Energy : Science – Society – Technology |
Volume of the journal: | 10 |
Issue Number: | 1 |
Collation: | 21 Seiten |
DOI: | 10.26083/tuprints-00028751 |
Corresponding Links: | |
Origin: | Secondary publication DeepGreen |
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. |
Uncontrolled Keywords: | Medium deep-BTES, Fault permeability, Basement rock, FE-model |
Identification Number: | Artikel-ID: 15 |
Status: | Publisher's Version |
URN: | urn:nbn:de:tuda-tuprints-287514 |
Classification DDC: | 500 Science and mathematics > 550 Earth sciences and geology |
Divisions: | 11 Department of Materials and Earth Sciences > Earth Science > Geothermal Science and Technology Exzellenzinitiative > Graduate Schools > Graduate School of Energy Science and Engineering (ESE) |
Date Deposited: | 14 Jan 2025 09:37 |
Last Modified: | 14 Jan 2025 09:38 |
SWORD Depositor: | Deep Green |
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/28751 |
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