Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.5
3.2
Journals
Energies
Special Issues
New Advances in Rock Mechanics and Underground Thermal Energy Storage
energies-logo
Submit to Energies Review for Energies Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

New Advances in Rock Mechanics and Underground Thermal Energy Storage

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "H: Geo-Energy".

Deadline for manuscript submissions: closed (16 May 2023) | Viewed by 4048

Special Issue Editors

Dr. Mateusz Janiszewski

E-Mail Website
Guest Editor
Department of Civil Engineering, School of Engineering, Aalto University, Espoo, Finland
Interests: rock mechanics; engineering geology; underground thermal energy storage; rock mass; geomechanical characterization; field testing; monitoring; remote sensing; photogrammetry; virtual reality
Dr. Lauri Uotinen

E-Mail Website
Guest Editor
Department of Civil Engineering, School of Engineering, Aalto University, Espoo, Finland
Interests: rock mechanics; underground thermal energy storage; rock joints; jointed rock mass; shear strength; fluid flow; photogrammetry; rock stress; stress inversion
Special Issues, Collections and Topics in MDPI journals
Dr. Baotang Shen

E-Mail Website
Guest Editor
CSIRO Mineral Resources, Brisbane, Australia
Interests: rock mechanics; mining engineering; rock fracture mechanics; numerical modeling; geotechnical monitoring; geothermal; borehole stability; rockburst; mine backfill

Special Issue Information

Dear Colleagues,

We are inviting submissions to a Special Issue of Energies on the subject area of “New Advances in Rock Mechanics and Underground Thermal Energy Storage”.

Underground thermal energy storage is a widely used energy storage technology, which makes use of the ground as a storage medium. Now more than ever, efficient and inexpensive energy storage systems are a crucial part of modern sustainable energy strategy for increasing the share of renewable energy and improving energy resource efficiency. The associated rock mechanical challenges related to the design and operation of thermal energy systems built in rock masses influence their long-term performance and profitability.

The topics of interest for publication include but are not limited to:

  • Novel underground thermal storage systems and technologies;
  • Seasonal thermal energy storage in rocks;
  • Laboratory and field testing;
  • Thermal and mechanical properties of rocks and rock masses;
  • Thermohydromechanical (THM) modeling;
  • Geomechanical, thermal, and microseismic monitoring;
  • Remote sensing methods for rock mass characterization;
  • Fracturing geomechanics; hydraulic stimulation;
  • Case studies, experimental and demonstration sites;
  • Cavern thermal energy storage (CTES);
  • Borehole thermal energy storage (BTES);
  • Large-scale pumped thermal electricity storage;
  • Ice thermal energy storage;
  • Enhanced geothermal systems (EGS);
  • Excavation-based enhanced geothermal systems (EGS-E);
  • Energy storage in abandoned mines.

Dr. Mateusz Janiszewski
Dr. Lauri Uotinen
Dr. Baotang Shen
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • rock mechanics
  • underground thermal energy storage (UTES)
  • numerical modeling
  • thermal analysis
  • structural analysis
  • fracture mechanics
  • rock mass characterization
  • storage systems
  • experimental and demonstration sites
  • monitoring
  • field testing
  • geothermal energy

Published Papers (3 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

38 pages, 13997 KiB  
Article
Thermal Performance Analysis on the Seasonal Heat Storage by Deep Borehole Heat Exchanger with the Extended Finite Line Source Model
by Xiangxi Qin, Yazhou Zhao, Chengjun Dai, Jian Wei and Dahai Xue
Energies 2022, 15(22), 8366; https://0-doi-org.brum.beds.ac.uk/10.3390/en15228366 - 09 Nov 2022
Cited by 2 | Viewed by 1195
Abstract
Deep borehole heat exchanger is promising and competitive for seasonal heat storage in the limited space underground with great efficiency. However, seasonal heat storage performance of the essentially deep borehole heat exchanger reaching kilometers underground was seldom studied. In addition, previous research rarely [...] Read more.
Deep borehole heat exchanger is promising and competitive for seasonal heat storage in the limited space underground with great efficiency. However, seasonal heat storage performance of the essentially deep borehole heat exchanger reaching kilometers underground was seldom studied. In addition, previous research rarely achieved comprehensive assessment for its thermal performance due to seasonal heat storage. Insight into the complicated heat transfer characteristics during the whole process of prior charging and subsequent discharging of deep borehole heat exchanger is in urgent need to be clarified. To this end, an extended finite line source model is proposed to investigate thermal performance of the deep borehole heat exchanger during charging and discharging stages. It is developed with modifications of classical finite line source model to consider the spatio-temporally non-uniform distribution of heat flux density and anisotropic thermal conductivity of deep rock. In general, simulation results demonstrate that thermal performance of the deep borehole heat exchanger deteriorates rapidly both during charging and discharging stages, making it impossible to sustain long-term efficient operation. Specifically, it was discovered that low temperature heat storage utilized only upper section of the borehole as effective heat storage section, and enhancement for heat extraction potential during the heating season was not significant. While high temperature heat storage by deep borehole heat exchanger could only enhance the heat extraction potential for 30 to 40 days in the initial stage of heating. Throughout the discharging, maximum thermal performance enhancement up to 11.27 times was achieved and the heat storage efficiency was evaluated at 2.86 based on average heat exchange rate. The findings of this study are intended to provide a guidance for decisionmakers to determine the most suitable seasonal heat storage strategy for the deep borehole heat exchanger and facilitate the application in engineering practice. Full article
(This article belongs to the Special Issue New Advances in Rock Mechanics and Underground Thermal Energy Storage)
►▼ Show Figures

Figure 1

17 pages, 12880 KiB  
Article
Research on Rock Damage Evolution Based on Fractal Theory-Improved Dynamic Tensile-Compression Damage Model
by Hengyu Su, Ziyi Wang and Shu Ma
Energies 2022, 15(17), 6194; https://0-doi-org.brum.beds.ac.uk/10.3390/en15176194 - 25 Aug 2022
Viewed by 880
Abstract
According to the characteristics that the dynamic tension of rock material is elastic brittle and the dynamic compression is elastic plastic, based on previous studies, the influence of initial damage is considered in the established compression damage model, and the calculation formula of [...] Read more.
According to the characteristics that the dynamic tension of rock material is elastic brittle and the dynamic compression is elastic plastic, based on previous studies, the influence of initial damage is considered in the established compression damage model, and the calculation formula of the damage threshold used to evaluate whether the surrounding rock is affected by blasting is given. According to the classic rock impact dynamic damage model and statistical damage mechanics theory, a rock compressive and tensile statistical damage constitutive model and impact damage model under blasting load is proposed. Based on the proposed damage model and the classic dynamic tensile damage model, the numerical simulation of blasting damage was carried out, and the numerical calculation results were compared with the field measurement results. Based on the established damage model, to further clarify the damage evolution characteristics of rock under blasting load, fractal dimension theory was introduced to analyze the rock damage under blasting loads with different blasting hole network parameters. The results show that compared with the axial direction of the blast hole, the direction of blast hole diameter is the main direction of blasting fracture extension. Tensile fracture mainly occurs along the hole diameter direction, and compression fracture mainly occurs below the hole bottom. Compared with the numerical calculation results based on the classical dynamic tensile damage model, the blasting fracture range obtained according to the damage model, especially the fracture depth below the bottom of the hole, was not much different from the measured value and was closest to the measured value. The crack density of 1 us, 90 aperture, and 130 aperture was larger than that of the other working conditions. Among them, the crack density of 130 aperture was the largest, followed by 90 aperture. At 2~3 us after initiation, cracks between two blast holes, radial cracks and circumferential cracks around two blast holes, and obvious cracks were formed around blastholes; at 4~5 us after initiation, the shock wave front decreased rapidly and propagated outward in the form of the compression wave. The crack propagation velocity was much smaller than that at 1~3 us after initiation. In summary, the proposed damage model is reasonable and has certain engineering practicability. Full article
(This article belongs to the Special Issue New Advances in Rock Mechanics and Underground Thermal Energy Storage)
►▼ Show Figures

Figure 1

12 pages, 3357 KiB  
Article
High Activity Earthquake Swarm Event Monitoring and Impact Analysis on Underground High Energy Physics Research Facilities
by Lukasz Scislo
Energies 2022, 15(10), 3705; https://0-doi-org.brum.beds.ac.uk/10.3390/en15103705 - 18 May 2022
Cited by 13 | Viewed by 1405
Abstract
A seismic swarm is a series of earthquakes that occur in a small area over a short period of time. A sequence of earthquakes of this magnitude is unusual in Switzerland, and it is impossible to anticipate how it may unfold in the [...] Read more.
A seismic swarm is a series of earthquakes that occur in a small area over a short period of time. A sequence of earthquakes of this magnitude is unusual in Switzerland, and it is impossible to anticipate how it may unfold in the future.The seismic activity of such an event usually fades after a few days or weeks. Significantly greater earthquakes are likely to occur during the next several days, with up to a chance of 5 to 10%. For these reasons, the underground research facilities need tools to provide data on the impact of these events on their experiments. The paper presents the techniques implemented at The European Organization for Nuclear Research (CERN) to allow the tracking and monitoring of these unusual events. Additionally, the real effect of such an unusual event is presented together with the statistical approach to monitoring and effect evaluation. Considering the collision energy of the beams at 14 TeV, the energy stored in the magnets at 10 GJ (2400 kg of TNT), and the energy carried by the two beams at 724 MJ (173 kg of TNT), prolonged exposure to vibration close to or above the set alarm levels may result in serious safety issues. The presented evaluation of earthquake swarm impact on underground facilities together with the approach for data evaluation can be used for the design of future detectors and accelerators. Additionally, it provides tools for facilities users to present the data in an easy to understand way. This includes the Future Circular Collider, whose purpose is to significantly expand the energy and intensity frontiers of planned particle colliders, with the goal of reaching collision energies of 100 TeV in the quest for novel physics. As a result, even greater standards for beam size and stability will be required. Full article
(This article belongs to the Special Issue New Advances in Rock Mechanics and Underground Thermal Energy Storage)
►▼ Show Figures

Figure 1

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-3
Back to TopTop