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Experimental research on the convection heat transfer characteristics of distilled water in manmade smooth and rough rock fractures

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  • Li, Zheng-Wei
  • Feng, Xia-Ting
  • Zhang, Yan-Jun
  • Zhang, Chi
  • Xu, Tian-Fu
  • Wang, Yun-Sen

Abstract

Convection heat transfer characteristics in a single rock fracture was experimentally investigated in this work. Distilled water was used as working medium for heat transfer in manmade smooth and rough fractures of sandstone and granite samples. The influence of fracture surface roughness on heat transfer intensity was analyzed. During seepage heat transfer process, evolution of samples external surface temperatures was monitored using six resistance temperature detectors to study the local heat transfer characteristics along the flow direction. Subsequently, heat transfer correlations were proposed on the basis of the experimental results. The results indicate that the roughness of rock fracture surface improves the overall heat transfer intensity to a certain extent, whereas lithology has little influence on the heat transfer intensity. For smooth fractures, the local heat transfer intensity decreases with the increase of the distance from the inlet. For rough fractures, evolution of sample external temperatures along the flow direction exhibits strong nonlinear characteristics with multiple peaks. Nu/Pr1/3 is close to a power function of Re under the experimental conditions in this work. With the increase of experimental temperature, the relationship gradually tends to be linear.

Suggested Citation

  • Li, Zheng-Wei & Feng, Xia-Ting & Zhang, Yan-Jun & Zhang, Chi & Xu, Tian-Fu & Wang, Yun-Sen, 2017. "Experimental research on the convection heat transfer characteristics of distilled water in manmade smooth and rough rock fractures," Energy, Elsevier, vol. 133(C), pages 206-218.
    • Handle: RePEc:eee:energy:v:133:y:2017:i:c:p:206-218
    DOI: 10.1016/j.energy.2017.05.127
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    Cited by:

    1. Zhang, Wei & Guo, Tian-kui & Qu, Zhan-qing & Wang, Zhiyuan, 2019. "Research of fracture initiation and propagation in HDR fracturing under thermal stress from meso-damage perspective," Energy, Elsevier, vol. 178(C), pages 508-521.
    2. He, Renhui & Rong, Guan & Tan, Jie & Phoon, Kok-Kwang & Quan, Junsong, 2022. "Numerical evaluation of heat extraction performance in enhanced geothermal system considering rough-walled fractures," Renewable Energy, Elsevier, vol. 188(C), pages 524-544.
    3. Heinze, Thomas, 2021. "Constraining the heat transfer coefficient of rock fractures," Renewable Energy, Elsevier, vol. 177(C), pages 433-447.
    4. Zhang, Wei & Qu, Zhanqing & Guo, Tiankui & Wang, Zhiyuan, 2019. "Study of the enhanced geothermal system (EGS) heat mining from variably fractured hot dry rock under thermal stress," Renewable Energy, Elsevier, vol. 143(C), pages 855-871.
    5. Ma, Yueqiang & Zhang, Yanjun & Hu, Zhongjun & Yu, Ziwang & Zhou, Ling & Huang, Yibin, 2020. "Numerical investigation of heat transfer performance of water flowing through a reservoir with two intersecting fractures," Renewable Energy, Elsevier, vol. 153(C), pages 93-107.
    6. Jin Luo & Yumeng Qi & Qiang Zhao & Long Tan & Wei Xiang & Joachim Rohn, 2018. "Investigation of Flow and Heat Transfer Characteristics in Fractured Granite," Energies, MDPI, vol. 11(5), pages 1-15, May.
    7. Ma, Yueqiang & Gan, Quan & Zhang, Yanjun & Yuan, Xuebing, 2022. "Experimental study of heat transfer between fluid flowing through fracture surface with tortuous seepage path," Renewable Energy, Elsevier, vol. 188(C), pages 81-95.
    8. Feng Xiong & Chu Zhu & Qinghui Jiang, 2021. "A Novel Procedure for Coupled Simulation of Thermal and Fluid Flow Models for Rough-Walled Rock Fractures," Energies, MDPI, vol. 14(4), pages 1-17, February.

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