Geothermal potential of tunnel infrastructures – development of tools at the city-scale of Basel, Switzerland

Epting, Jannis; Baralis, Matteo; Künze, Rouven; Mueller, Matthias H.; Insana, Alessandra; Barla, Marco; Huggenberger, Peter

doi:10.1016/j.geothermics.2019.101734

Cited by 24 publications

(7 citation statements)

References 28 publications

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“…Tunnel lining segments [15] Energy supply of office and retail buildings [15] Basel, planned tunnel infrastructure Switzerland Rail and Road n.a. Tunnel lining segments [16] Potential evaluation [16] a Not available.…”

Section: Polandmentioning

confidence: 99%

Tunnelgeothermie – Ein Überblick

Stemmle

Menberg

Rybach

et al. 2022

Geomechanics and Tunnelling

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Tunnel geothermal systems hold the potential to promote decarbonization of the building heating and cooling sector. They can be integrated into existing infrastructure, resulting in low additional costs. In addition, these systems have large contact areas with the ground leading to larger heat fluxes. However, tunnel geothermics is relatively unknown and rarely used. Thus, the objective of this study is to provide an overview of the two primary tunnel geothermal system types as well as their application and potential. Open hydrothermal systems use the tunnel drainage water as a heat source, whereas closed absorber systems harness the heat flux from the subsoil and the warm tunnel interior via heat exchangers. The evaluation of the global application of existing and planned tunnel geothermal systems shows that all open systems are currently located in mountainous regions with a thick rock overburden. In contrast, closed absorber systems are mostly installed in urban tunnel infrastructures. The spatial distribution of geothermal tunnel systems has a focus in central Europe with Switzerland, Germany and Austria being the countries with the highest number of installed systems. Finally, this study also presents a brief summary of existing methods to determine the geothermal potential of tunnels.

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Section: Polandmentioning

confidence: 99%

Tunnelgeothermie – Ein Überblick

Stemmle

Menberg

Rybach

et al. 2022

Geomechanics and Tunnelling

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“…In this case study, we used climate data from the city of Basel, which is located in northwestern Switzerland, near the French and German borders, 300 meters above sea level. The climate of Basel is moderately continental, with cold winters and fairly hot summers (Epting et al, 2020).…”

Section: The Experimental Data Case Studymentioning

confidence: 99%

Optimization of a Management Algorithm for an Innovative System of Automatic Switching between Two Photovoltaic and Wind Turbine Modes for an Ecological Production of Green Energy

Lahlou

Hajji

Aggour

2022

Int. J. Renew. Energy Dev.

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Today, renewable energy and energy efficiency are key to limiting global warming and preventing the dangerous effects of climate change. The biggest problem with conventional solar and wind turbine systems is the intermittency of electrical power generation. Even if these two energy sources can be complementary, the space occupied by these hybrid systems remains very important. This work proposes an improved management algorithm for a patented transformable photovoltaic-wind system, which mainly uses two flexible photovoltaic panels which are automatically deformed by an electromechanical system from the planar shape to the semi-cylindrical shape of the Savonius wind turbine blades. When weather conditions change, this system switches to eco-friendly photovoltaic (PV) or wind turbine (WT) mode, allowing a good total power generation from two solar power sources or wind turbine power. The contribution brought for this work relates to the realization and the improvement of the management algorithm to determine a better change to the mode PV or the mode WT. The operation test was simulated in 8760 hours for the year 2021. This developed algorithm allows several theoretical calculations of the power produced from solar radiation and wind speed data, thereafter the algorithm compare and determines the overall power and selects the optimal PV or WT mode. In this study, the overall power generated by the invented system produces more electricity per hour, the power Pt increases by 75.55% compared to the power Pwt, and also the power Pt increases by 68.15% compared to Pvp power.

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“…Energy geostructures characterized by an interface with underground built environments allow the harvesting of both geothermal and aerothermal energy [109]. Meanwhile, 'hot' and 'cold' tunnels can aid or harm energy operations depending on the targeted application [e.g., 113,114]. Therefore, heat transfer with only the ground or also with the underground built environments may be relevant to achieve and simulate.…”

Section: Modeling Of Environmental Boundary Conditionsmentioning

confidence: 99%

Energy geostructures: Theory and application

Loria

2020

E3S Web Conf.

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The subsurface represents space and resource of ever-growing importance to meet human activity needs associated with the availability of built environments and energy. So-called energy geostructures represent a breakthrough technology in this context. By integrating the structural support role of earth-contact structures with the heating-cooling role of shallow geothermal heat exchangers, energy geostructures can sustain or enclose built environments while providing them with renewable thermal energy. Despite such promising features, the integrated roles of energy geostructures pose various challenges to understand their behavior and performance, and to address the related analysis and design. Appropriate formulation and application of scientific theory are crucial for the successful analysis and design of energy geostructures. This Bright Spark Lecture Paper presents selected theory for addressing the behavior and performance of energy geostructures, and discusses the application of this theory to analysis and design. In this context, the work focuses on energy piles and barrettes, energy tunnels, as well as energy walls and slabs. The ultimate goal of this paper is to provide competence for facilitating future research and development of energy geostructures across science and engineering.

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Geothermal potential of tunnel infrastructures – development of tools at the city-scale of Basel, Switzerland

Cited by 24 publications

References 28 publications

Tunnelgeothermie – Ein Überblick

Tunnelgeothermie – Ein Überblick

Optimization of a Management Algorithm for an Innovative System of Automatic Switching between Two Photovoltaic and Wind Turbine Modes for an Ecological Production of Green Energy

Energy geostructures: Theory and application

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