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3D Numerical Modeling of Water-Rock Coupling Heat Transfer Within a Single Fracture

文献类型：期刊论文

作者He, Yuanyuan2,3; Bai, Bing1,3; Cui, Yinxiang1,3; Lei, Hongwu3; Li, Xiaochun3
刊名INTERNATIONAL JOURNAL OF THERMOPHYSICS
出版日期2020-07-11
卷号41期号:9页码:22
关键词EGS Fracture HDR Heat transfer coefficient Inner surface temperature
ISSN号0195-928X
DOI10.1007/s10765-020-02691-y
英文摘要Understanding working fluids flow and heat transfer in Enhanced Geothermal System (EGS) is critically important for assessing production capabilities and heat extraction rates from hot dry rock (HDR) effectively. Water is a conventional working fluid of EGS; therefore, it is necessary to study water-rock coupling heat transfer within HDR fractures. A single fracture is a basic element of complex fracture systems of EGS, so there has been many researches investigating water flow and heat transfer through a single fracture within a cylindrical HDR specimen for preliminary study, and heat transfer coefficient (HTC) is often adopted to evaluate heat transfer performance between water and rock, but there is a lack of knowledge about the inner surface temperature (T-i), which is a key parameter to calculate HTCs, due to limitations of current experimental methods and analytical solutions. Numerical modeling can be an alternative way to help us have a more comprehensive understanding of the distributions of T-i, but the 2D numerical models only reveal the distribution of T-i along the flow direction without its distribution perpendicular to the flow direction, namely, the distribution along radius. Therefore, it is essential to conduct the corresponding 3D numerical modeling to obtain the radial distribution of T-i. In this paper, a 3D numerical model accounting for surface morphology is proposed to simulate water flow and heat transfer through a single fracture within a cylindrical HDR specimen and verified by experimental data. The results reveal that the radial distribution of T-i can be described by a quadratic function mostly, and neither the surface morphology nor the phase state has influence on the tendency of T-i. Finally, four relatively stable formulas to calculate HTCs so far are compared and discussed.
资助项目National Natural Science Foundation of China[41672252] ; China Scholarship Council[201804910874]
WOS研究方向Thermodynamics ; Chemistry ; Mechanics ; Physics
语种英语
WOS记录号WOS:000552049500003
出版者SPRINGER/PLENUM PUBLISHERS
源URL[http://119.78.100.198/handle/2S6PX9GI/24561]  
专题中科院武汉岩土力学所
通讯作者Bai, Bing
作者单位1.Chinese Acad Sci, Inst Rock & Soil Mech, Hubei Key Lab Geoenvironm Engn, Wuhan 430071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China
推荐引用方式
GB/T 7714		 He, Yuanyuan,Bai, Bing,Cui, Yinxiang,et al. 3D Numerical Modeling of Water-Rock Coupling Heat Transfer Within a Single Fracture[J]. INTERNATIONAL JOURNAL OF THERMOPHYSICS,2020,41(9):22.
APA He, Yuanyuan,Bai, Bing,Cui, Yinxiang,Lei, Hongwu,&Li, Xiaochun.(2020).3D Numerical Modeling of Water-Rock Coupling Heat Transfer Within a Single Fracture.INTERNATIONAL JOURNAL OF THERMOPHYSICS,41(9),22.
MLA He, Yuanyuan,et al."3D Numerical Modeling of Water-Rock Coupling Heat Transfer Within a Single Fracture".INTERNATIONAL JOURNAL OF THERMOPHYSICS 41.9(2020):22.

入库方式： OAI收割

来源：武汉岩土力学研究所

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