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http://dx.doi.org/10.7474/TUS.2014.24.4.297

Stability Analysis of Multiple Thermal Energy Storage Caverns Using a Coupled Thermal-Mechanical Model  

Kim, Hyunwoo (KIGAM)
Park, Dohyun (KIGAM)
Park, Eui-Seob (KIGAM)
Sunwoo, Choon (KIGAM)
Publication Information
Tunnel and Underground Space / v.24, no.4, 2014 , pp. 297-307 More about this Journal
Abstract
Cavern Thermal Energy Storage system stores thermal energy in caverns to recover industrial waste heat or avoid the sporadic characteristics of renewable-energy resources, and its advantages include high injection-and-extraction powers and the flexibility in selecting a storage medium. In the present study, the structural stability of rock mass pillar between these silo-type storage caverns was assessed using a coupled thermal-mechanical model in $FLAC^{3D}$. The results of numerical simulations showed that thermal stresses due to long-term storage depended on pillar width and had significant effect on the pillar stability. A sensitivity analysis of main factors indicated that the influence on the pillar stability increased in the order cavern depth < pillar width < in situ condition. It was suggested that two identical caverns should be separated by at least one diameter of the cavern and small-diameter shaft neighboring the cavern should be separated by more than half of the cavern diameter. Meanwhile, when the line of centers of two caverns was parallel to the direction of maximum horizontal principal stress, the shielding effect of the caverns could minimize an adverse effect caused by a large horizontal stress.
Keywords
Thermal energy storage; Multiple rock caverns; Thermal stress; Coupled thermal-mechanical model; Sensitivity analysis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 Nordell, B., M. Grein and M. Kharseh, 2007, Large-scale utilization of renewable energy requires energy storage, Proceedings of International Conference for Renewable Energies and Sustainable Development, Algeria.
2 Obert, L. and W.I. Duvall, 1967, Rock mechanics and the design of structures in rock, John Willey & Sons.
3 Park, D., H.M. Kim, D. Ryu, B.H. Choi, C. Sunwoo and K.C. Han, 2013a, The effect of aspect ratio on the thermal stratification and heat loss in rock caverns for underground thermal energy storage, International Journal of Rock Mechanics and Mining Sciences 64, 201-209.   DOI
4 Park, D., D. Ryu, B.H. Choi, C. Sunwoo and K.C. Han, 2013c, Thermal stratification and heat loss in underground thermal storage caverns with different aspect ratios and storage volumes, Tunnel & Underground Space 23.4, 308-318.   과학기술학회마을   DOI
5 Park, S.H., 2009, Design of experiment, Minyoungsa.
6 Pariseau, W.G., 2007, Design analysis in rock mechanics, Taylor & Francis.
7 Pavlov, G.K. and B.W. Olesen, 2011, Seasonal ground solar thermal energy storage review of systems and applications, Proceedings of ISES Solar World Congress, Kassel, Germany, 515-525.
8 Robertson, E.C. and B.S. Hemingway, 1995, Estimating heat capacity and heat content of rocks, U.S. Geological Survey Open-file Report 95-622.
9 Shim, B.O. and C.W. Lee, 2010, Status of underground thermal energy storage as shallow geothermal energy, Economic and Environmental Geology 43.2, 197-205.   과학기술학회마을
10 Van der Molen, I., 1981, The shift of the ${\alpha}-{\beta}$ transition temperature of quartz associated with the thermal expansion of granite at high pressure, Tectonophysics 73.4, 323-342.   DOI
11 Andersson, J.C., 2007, Rock mass response to coupled mechanical thermal loading: Aspo Pillar Stability Experiment, Sweden, Doctoral thesis, Royal Institute of Technology, Sweden.
12 Bauer, S.J. and B. Johnson, 1979, Effects of slow uniform heating on the physical properties of the Westerly and Charcoal granites, Proceedings of the 20th symposium on rock mechanics, Austin, TX, 7-18.
13 Birch, F. and H. Clark, 1940, The thermal conductivity of rocks and its dependence upon temperature and composition, American Journal of Science 238.8, 529-558.   DOI
14 Itasca Consulting Group, Inc., 2009, $FLAC^{3D}$ Manual-Thermal Analysis.
15 Choi, S.O., C. Park, J.H. Synn and H.S. Shin, 2008, A decade's experiences on the hydrofracturing in-situ stress measurement for tunnel construction in Korea, Proceedings of the Korean Society for Rock Mechanics 2008 Spring Conference, 79-88.
16 Heuze, F.E., 1983, High-temperature mechanical, physical and thermal properties of granitic rocks-A review, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts 20.1, 3-10.   DOI   ScienceOn
17 Hoek, E., C. Carranza-Torres and B. Corkum, 2002, Hoek-Brown failure criterion-2002 edition, Proceedings of the 5th North American Rock Mechanics Symposium, Toronto, Canada, 267-273.
18 KIGAM, 2012, Development of core technology for underground thermal energy storage in rock cavern, Research report GP2011-003-2012(1) Part. III, Ministry of Knowledge Economy.
19 Lee, H.W. and C.I. Lee, 1996, A study on temperature dependency of strength and deformation behavior of rocks, Tunnel & Underground Space 6.2, 101-121.   과학기술학회마을
20 Lunder, P.J., 1994, Hard rock pillar strength estimation-An applied empirical approach, M.S. thesis, University of British Columbia, Canada.
21 Martin, C.D. and W.G. Maybee, 2000, The strength of hard-rock pillars, International Journal of Rock Mechanics and Mining Sciences 37, 1239-1246.   DOI   ScienceOn
22 Park, D., D. Ryu, B.H. Choi, C. Sunwoo and K.C. Han, 2013b, Mechanical stability analysis to determine the optimum aspect ratio of rock caverns for thermal energy storage, Tunnel & Underground Space 23.2, 150-159.   과학기술학회마을   DOI   ScienceOn