A Case Study of Thermal Evolution in the Vicinity of Geothermal Probes Following a Distributed TRT Method

Hans Schwarz, Borja Badenes, Jan Wagner, José Manuel Cuevas, Javier Urchueguía and David Bertermann
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Hans Schwarz: Geo-Centre of Northern Bavaria, Chair of Geology, Friedrich-Alexander University Erlangen-Nuremberg, Schlossgarten 5, 91054 Erlangen, Germany
Borja Badenes: Institute of Information and Communication Technologies (ITACA), Universitat Politècnica de València, Camino de Vera S/N, 46022 València, Spain
Jan Wagner: Geo-Centre of Northern Bavaria, Chair of Geology, Friedrich-Alexander University Erlangen-Nuremberg, Schlossgarten 5, 91054 Erlangen, Germany
José Manuel Cuevas: Institute of Information and Communication Technologies (ITACA), Universitat Politècnica de València, Camino de Vera S/N, 46022 València, Spain
Javier Urchueguía: Institute of Information and Communication Technologies (ITACA), Universitat Politècnica de València, Camino de Vera S/N, 46022 València, Spain
David Bertermann: Geo-Centre of Northern Bavaria, Chair of Geology, Friedrich-Alexander University Erlangen-Nuremberg, Schlossgarten 5, 91054 Erlangen, Germany

Energies, 2021, vol. 14, issue 9, 1-17

Abstract: To meet the stated climate change targets and to ensure the capability of meeting the current and future energy demands, there is an urgent need to develop renewable energy sources, such as geothermal systems. If geothermal systems are to be cost-efficient and are to enjoy public confidence, it is essential that they are designed and installed in accordance with the prevailing site-specific conditions. A thorough understanding of the thermal behaviour of the surrounding ground is, therefore, critical. In this work, we investigated temperature and its evolution in the vicinity of a shallow geothermal helix-shaped borehole heat exchanger (BHE). To measure the temperature close to the actual geothermal system, an additional U-tube probe was installed at the edge of the same borehole. A thermal load was then applied to the BHE, and the temperature was detected in the nearby U-tube. The temperature measurements were made with a GEOSniff monitoring device. To understand these localised temperature measurements in the context of the Valencia test site, ERT measurements were also performed. The GEOSniff device permits measurements to be made with very high depth resolution, which allows the thermal properties of the surrounding ground to be derived precisely, thus, enabling the identification of the different textural domains.

Keywords: thermal evolution; thermal soil properties; shallow geothermal systems; distributed thermal response test (DTRT); wireless distributed temperature sensing (DTS); electrical resistivity tomography (ERT) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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