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Evaluation of development potential of pumped hydroelectric storage and geothermal utilization system in abandoned coal mine

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Journal of Central South University 2024年第8期31卷 2872-2890页

作者： WANG Meng GUO Ping-ye JIN Xin DANG Guan-jie GUO Yi-chen LI Yi State Key Laboratory for Tunnel Engineering China University of Mining and Technology-BeijingBeijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology-BeijingBeijing 100083China

Every year in China,a significant number of mines are closed or *** pumped hydroelectric storage(PHS)and geothermal utilization are vital means to efficiently repurpose resources in abandoned *** this work,the development potentials of the PHS and geothermal utilization systems were *** the geological conditions and meteorological data available of Jiahe abandoned mine,a simple evaluation model for PHS and geothermal utilization was *** average efficiency of the PHS system exceeds 70%and the regulatable energy of a unit volume is over 1.53 kW·h/m^(3).The PHS system achieves optimal performance when the wind/solar power ratio reaches 0.6 and 0.3 in daily and year scale,*** the geothermal utilization system,the outlet temperature and heat production are significantly affected by the injection flow *** heat production performance is more stable at lower rate flow,and the proportion of heat production is higher in the initial stage at greater flow *** the operating time increases,the proportion of heat production gradually *** cyclic heat storage status has obvious advantages in heat generation and ***,the energy-saving and emission reduction benefits of PHS and geothermal utilization systems were calculated.

关键词： abandoned mine underground reservoir wind/solar energy pumped hydroelectric storage geothermal

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