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Efficient utilization of abandoned mines for isobaric compressed

The number of abandoned coal mines will reach 15000 by 2030 in China, and the corresponding volume of abandoned underground space will be 9 billion m 3, which can offer a good choice of energy storage with large capacity and low cost for renewable energy generation [22, 23].WP and SP can be installed at abandoned mining fields due to having large occupied area, while

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Underground Thermal Energy Storage | SpringerLink

Technology of underground thermal energy storage has a 40-year history, which began with cold storage in aquifers in China. Caverns used can be natural or man made, including depleted oil or natural gas fields, or abandoned mine tunnels and shafts. These storage technologies are technically feasible, but the actual application is still

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Thermal energy storage with tunnels in different subsurface

This study aimed to identify impacts of changes in subsurface environments on the thermal energy storage performance of un-derground tunnels used as heat exchangers. The findings

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Coupled thermodynamic and thermomechanical modelling for

DOI: 10.1016/j.ijrmms.2024.105717 Corpus ID: 268625712; Coupled thermodynamic and thermomechanical modelling for compressed air energy storage in underground mine tunnels @article{Miao2024CoupledTA, title={Coupled thermodynamic and thermomechanical modelling for compressed air energy storage in underground mine tunnels}, author={Xiuxiu Miao and Kai

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Tunnels + Tunneling

When one thinks of energy storage, they likely think of a chemical battery. But there is another form of energy Right: Typical layout arrangement of a 3-cavern underground excavations from tunnels, shafts and adits to caverns 019_024ttna0923_stantec dd 22 21/09/2023 10:23. PUMPED STORAGE TUNNELS | INSIGHT

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Design issues for compressed air energy storage in sealed underground

Compressed air energy storage (CAES) systems represent a new technology for storing very large amount of energy. A peculiarity of the systems is that gas must be stored under a high pressure (p = 10–30 MPa).A lined rock cavern (LRC) in the form of a tunnel or shaft can be used within this pressure range.

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How do energy tunnels work?

In fact, through diverse shapes in contact with the ground (e.g., prisms with cylindrical, egg-shaped, squared, or rectangular cross-sections), energy tunnels and other underground infrastructures involve an unchartered energy performance for heat storage.

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Influence of convection on the thermal storage performance of energy

This paper focuses on the efficacy of so-called energy tunnels (i.e., tunnels equipped with pipe heat exchangers) used for underground thermal energy storage. By harnessing a 3-D thermo-hydraulic finite element model validated against full-scale experimental data, this work specifically explores seasonal, medium-temperature, thermal energy

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Underground Thermal Energy Storage

Underground thermal energy storage (UTES) is a form of STES useful for long-term purposes owing to its high storage capacity and low cost (IEA I. E. A., 2018).UTES effectively stores the thermal energy of hot and cold seasons, solar energy, or waste heat of industrial processes for a relatively long time and seasonally (Lee, 2012) cause of high thermal inertia, the

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HEATSTORE – Underground Thermal Energy Storage

Proceedings World Geothermal Congress 2020+1 Reykjavik, Iceland, April - October 2021 1 HEATSTORE – Underground Thermal Energy Storage (UTES) – State of the Art, Example Cases and Lessons Learned Anders J. Kallesøe1, Thomas Vangkilde-Pedersen1, Jan E. Nielsen2, Guido Bakema3, Patrick Egermann4, Charles Maragna5, Florian Hahn6, Luca Guglielmetti7

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Underground Storage and Disposal | WSP in the U.S.

WSP USA provides comprehensive services in underground energy storage caverns as well as storage and disposal wells. 3D Numerical Modelling Solves Challenges for Underground Rail Tunnels To alleviate traffic congestion in the western district of Hong Kong Island, a Mass Transit Railway (MTR) West Island Line (WIL) has been constructed.

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Analysis of Underground Renewable Energy Storage

Analysis of Underground Renewable Energy Storage 103 top, were kept such that all the aspects were at a distance three times the diameter of tunnels, measuring from the centre of the underground tunnel. Hence, gaining the satisfactory boundary condition, i.e., the stress contour became non-significant

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Experimental and numerical investigations of the energy

Subsequently, the surrounding rock of the tunnel borehole can also act as an underground energy storage container. The unstable solar energy is converted into stable geothermal energy through the solar collector and heat exchangers. The thermal energy storage potential of underground tunnels used as heat exchangers. Renew. Energy, 176 (2021

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Energy tunnels: concept and design aspects

Owing to the favorable underground water flow conditions in Torino, the energy tunnel system would allow exchanging between 53 and 74 W/m 2 of tunnel lining in winter and in summer respectively. These figures would allow covering the energy needs of up to 1.67 kW in heating mode and 2.34 kW in cooling mode, considering the total tunnel length

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A Study on the Transient Response of Compressed Air Energy Storage

This study focuses on the renovation and construction of compressed air energy storage chambers within abandoned coal mine roadways. The transient mechanical responses of underground gas storage chambers under a cycle are analyzed through thermal-solid coupling simulations. These simulations highlight changes in key parameters such as displacement,

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Thermal energy storage with tunnels in different subsurface

This work focuses on tunnels equipped with ground heat exchangers, typically called energy tunnels, to serve as seasonal, medium-temperature underground thermal energy storage

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(PDF) Thermo-mechanical analysis of energy tunnels accounting

This paper presents an unprecedented investigation of the thermal energy storage potential of underground tunnels used as heat exchangers, often called energy tunnels, with a focus on seasonal

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Coupled thermodynamic and thermomechanical modelling for

Compressed air energy storage (CAES) in underground mine tunnels using the technique of lined rock cavern (LRC) provides a promising solution to large-scale energy storage. A coupled thermodynamic and thermomechanical modelling for CAES in mine tunnels was implemented. Thermodynamic analysis of air during CAES operation was carried out. Difference in

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Thermal energy storage with tunnels in different subsurface

This study aimed to identify impacts of changes in subsurface environments on the thermal energy storage performance of un-derground tunnels used as heat exchangers. The findings indicate a positive influence of subsurface temperature rises on the thermal energy storage performance of underground tunnels.

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Energy tunnels: A review of the state of the art and knowledge

Additionally, Rotta Loria (2021) evaluated the potential of energy tunnels as underground thermal energy storage systems and discovered that storage efficiencies could reach up to 70%. Li et al. (2022a) concluded that the use of energy tunnels for space cooling in tropical areas of China could reduce 25% of CO 2 emissions and electricity usage

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(PDF) Compressed Air Energy Storage (CAES): Current Status

We discuss underground storage options suitable for CAES, including submerged bladders, underground mines, salt caverns, porous aquifers, depleted reservoirs, cased wellbores, and surface pressure

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Energy from closed mines Underground energy storage and

form of large-scale energy storage available, which is essential for en-suring grid stability and supply security when conventional fuel is re-placed by renewable energy sources [32,37] and to cover peak load demand in an unstable energy environment [38]. In addition, the re-sponse time of the Pumped Hydroelectric Energy Storage (PHES) to

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Technical feasibility of lined mining tunnels in closed coal mines

The use of abandoned underground mines as facilities for storing energy in form of compressed air has been investigated by Lutynski et al. [18] and Ishitata et al. [20] pared to underground storage caverns, CAES reservoirs are subjected to relatively high-frequency load cycles on a daily or even hourly basis.

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Energy from closed mines: Underground energy storage and geothermal

O&M costs for maintaining deep infrastructure, including the ventilation system and the underground structures (shafts, tunnel of access, reservoir) make UPHES less profitable. The use of closed mines for underground energy storage plants and geothermal applications has significant environment advantages, but typically higher operation and

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Does subsurface temperature affect thermal energy storage performance of underground tunnels?

The findings indicate a positive influence of subsurface temperature rises on the thermal energy storage performance of underground tunnels. Meanwhile, the findings indicate a generally detrimental role played by convection heat transfer for the performance of such systems.

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Why are energy tunnels important?

A significant feature of energy tunnels, similar to other underground infrastructures, is that they are characterized by a relatively low surface-area-to-volume ratio [ , , ] – a valuable attribute for the effective storage of thermal energy.

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Advances in Underground Energy Storage for Renewable Energy

Underground energy storage systems with low environmental impacts using disused subsurface space may be an alternative to provide ancillary services in the European electricity grids. In this Special Issue, advances in underground pumped storage hydropower, compressed air energy storage, and hydrogen energy storage systems are presented as

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The thermal energy storage potential of underground tunnels

This paper presents an unprecedented investigation of the thermal energy storage potential of underground tunnels used as heat exchangers, often called energy tunnels, with a focus on seasonal, medium-temperature thermal energy storage applications. The study is

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Numerical Studies on Underground Thermal Energy Storages

2.3 Calculation Details. To simulate an underground thermal energy storage, thermal boundary conditions are defined. PLAXIS 2D (Bentley Systems, 2020) offers two possibilities either line-based thermal flow boundary conditions or cluster-related thermal conditions.As the main aim was to simulate a fully heated storage over a calculation time of

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About Energy storage in underground tunnels

About Energy storage in underground tunnels

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