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Evaluating thermal losses and storage capacity in high-temperature aquifer thermal energy storage (HT-ATES) systems with well operating limits: insights from a study-case in the Greater Geneva Basin, Switzerland

Abstract : High-temperature aquifer thermal energy storage (HT-ATES) may play a key role in the development of sustainable energies and thereby in the overall reduction of CO2 emission. To this end, a thorough understanding of the thermal losses associated with HT-ATES is crucial. We provide in this study a numerical investigation of the thermal performance of an HT-ATES system for a heterogeneous aquifer modelled after a well-defined region in the Greater Geneva Basin (Switzerland), where the excess heat produced by a nearby waste-to-energy plant is available for storage. We consider different aquifer properties and flow conditions, with complex injection strategies that respect maximum/minimum well pressures and temperatures, as well as legal regulations. Based on the results, we also draw conclusions on the economical feasibility (e.g., energy recovery factor vs. drilling costs) for the different strategies. Our results indicate that the true behaviour of HT-ATES systems may deviate significantly from theoretical performance derived from idealised cases. This is particularly true when the operational pressure and temperature ranges of the wells are restricted, and for heterogeneous aquifers.
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https://hal-insu.archives-ouvertes.fr/insu-03227510
Contributor : Marine Collignon <>
Submitted on : Monday, May 17, 2021 - 12:46:15 PM
Last modification on : Thursday, May 27, 2021 - 1:54:07 PM
Long-term archiving on: : Wednesday, August 18, 2021 - 6:33:53 PM

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Marine Collignon, Øystein Strengehagen Klemetsdal, Olav Møyner, Marion Alcanié, Antonio Pio Rinaldi, et al.. Evaluating thermal losses and storage capacity in high-temperature aquifer thermal energy storage (HT-ATES) systems with well operating limits: insights from a study-case in the Greater Geneva Basin, Switzerland. Geothermics, Elsevier, 2020, 85, pp.101773. ⟨10.1016/j.geothermics.2019.101773⟩. ⟨insu-03227510⟩

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