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Applied Sciences
Volume 15
Issue 18
10.3390/app151810070
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Potential Evaluation of Cross-Seasonal Heat Storage of Coal Mine Underground Reservoir: A Case Study Based on Multiphysics Coupling Numerical Simulation Method

by
Zhenyu Wang
1,2,
Jiawei Tang
1,*,
Zixu Hu
1,2,*,
Qiang Guo
1,
Haiqin Zhang
1,
Kangning Zhang
1,
Siwei Kang
1 and
Xiaolin He
2,3
1
State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, National Institute of Low Carbon and Clean Energy, Beijing 102211, China
2
School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin City 132012, China
3
China Construction Second Engineering Bureau Co., Ltd., Beijing 100160, China
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2025, 15(18), 10070; https://doi.org/10.3390/app151810070
Submission received: 23 July 2025 / Revised: 11 September 2025 / Accepted: 11 September 2025 / Published: 15 September 2025
Versions Notes

Abstract

This study explores the innovative use of post-mining subsurface voids by proposing a coal mine goaf-based underground reservoir energy storage system. By fully utilizing the geothermal potential and insulation properties of the mined-out coal seam, we established a finite element model considering the thermal-fluid coupling process to describe the seasonal energy storage process of the underground coal mine reservoir and analyzed the feasibility of achieving seasonal hot water storage through the underground reservoir, based on the model calculation results. By studying the temperature state of the hot water after the end of the heat storage process and the hot water output effect, the thermal energy storage and utilization potential of the underground reservoir were quantitatively analyzed using the factors of heat storage and heat production. The research results have clarified the feasibility of using coal mine underground reservoirs for cross-seasonal heat storage applications. The results of this study can provide new ideas for the utilization of coal mine goaf areas and underground goaf residual spaces and serve as a reference for the development and design of new energy storage facilities.
Keywords: coal mine underground water reservoir; geothermal energy; cross-seasonal heat storage; multiphysics coupling; numerical simulation coal mine underground water reservoir; geothermal energy; cross-seasonal heat storage; multiphysics coupling; numerical simulation

Share and Cite

MDPI and ACS Style

Wang, Z.; Tang, J.; Hu, Z.; Guo, Q.; Zhang, H.; Zhang, K.; Kang, S.; He, X. Potential Evaluation of Cross-Seasonal Heat Storage of Coal Mine Underground Reservoir: A Case Study Based on Multiphysics Coupling Numerical Simulation Method. Appl. Sci. 2025, 15, 10070. https://doi.org/10.3390/app151810070

AMA Style

Wang Z, Tang J, Hu Z, Guo Q, Zhang H, Zhang K, Kang S, He X. Potential Evaluation of Cross-Seasonal Heat Storage of Coal Mine Underground Reservoir: A Case Study Based on Multiphysics Coupling Numerical Simulation Method. Applied Sciences. 2025; 15(18):10070. https://doi.org/10.3390/app151810070

Chicago/Turabian Style

Wang, Zhenyu, Jiawei Tang, Zixu Hu, Qiang Guo, Haiqin Zhang, Kangning Zhang, Siwei Kang, and Xiaolin He. 2025. "Potential Evaluation of Cross-Seasonal Heat Storage of Coal Mine Underground Reservoir: A Case Study Based on Multiphysics Coupling Numerical Simulation Method" Applied Sciences 15, no. 18: 10070. https://doi.org/10.3390/app151810070

APA Style

Wang, Z., Tang, J., Hu, Z., Guo, Q., Zhang, H., Zhang, K., Kang, S., & He, X. (2025). Potential Evaluation of Cross-Seasonal Heat Storage of Coal Mine Underground Reservoir: A Case Study Based on Multiphysics Coupling Numerical Simulation Method. Applied Sciences, 15(18), 10070. https://doi.org/10.3390/app151810070

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