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Heat extraction and recover of deep borehole heat exchanger: Negotiating with intermittent operation mode under complex geological conditions

Author

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  • Luo, Yongqiang
  • Xu, Guozhi
  • Zhang, Shicong
  • Cheng, Nan
  • Tian, Zhiyong
  • Yu, Jinghua

Abstract

The geothermal heat pump system based on deep borehole heat exchanger (DBHE) is one of the important systems to realize cleaner heating. It is key to ensure that DBHE can make full use of the dynamic characteristics of deep heat extraction and recovery (HER) in a long period of time to maintain the stability of geothermal field as well as sustainable development of DBHE and geothermal energy. This study mainly has made contributions in the following four aspects: (1) Through numerical analysis with a “stratified segmented finite line source method” (S2-FLS) and its model analytical expression, the impacts of heating duration and heating load distribution on the long-term operation performance of DBHE is revealed, which provides a theoretical basis for the optimal operation of DBHE. (2) The numerical analysis explained how complex geological conditions affect the dynamic heat extraction and heat recovery of DBHE in intermittent operation mode, which provides a theoretical basis for DBHE drilling site selection. (3) The model robustness is fully checked and an initial investigation on DBHE array with HER is presented, which may lead to massive application of deep geothermal systems.

Suggested Citation

  • Luo, Yongqiang & Xu, Guozhi & Zhang, Shicong & Cheng, Nan & Tian, Zhiyong & Yu, Jinghua, 2022. "Heat extraction and recover of deep borehole heat exchanger: Negotiating with intermittent operation mode under complex geological conditions," Energy, Elsevier, vol. 241(C).
    • Handle: RePEc:eee:energy:v:241:y:2022:i:c:s0360544221027596
    DOI: 10.1016/j.energy.2021.122510
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    References listed on IDEAS

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    2. Boyu Li & Fei Lei & Zibo Shen, 2025. "A Comprehensive Simplified Algorithm for Heat Transfer Modeling of Medium-Deep Borehole Heat Exchangers Considering Soil Stratification and Geothermal Gradient," Energies, MDPI, vol. 18(14), pages 1-32, July.
    3. Su, Yangyang & Deng, Jiewen & Liao, Yin & Wang, Yanhui & Ma, Minghui & Peng, Chenwei & Wei, Qingpeng & Cai, Wanlong & Yu, Jinghua, 2025. "How to make full use of heat storage characteristic of mid-deep borehole heat exchangers hybrid with heat pump storage systems: Field tests and simulation analysis," Energy, Elsevier, vol. 338(C).
    4. Li, Jianwei & Bao, Lingling & Niu, Guoqing & Miao, Zhuang & Guo, Xiaokai & Wang, Weilian, 2024. "Research on renewable energy coupling system based on medium-deep ground temperature attenuation," Applied Energy, Elsevier, vol. 353(PB).
    5. Chen, Xuyue & Du, Xu & Yang, Jin & Gao, Deli & Zou, Yiqi & He, Qinyi, 2022. "Developing offshore natural gas hydrate from existing oil & gas platform based on a novel multilateral wells system: Depressurization combined with thermal flooding by utilizing geothermal heat from existing oil & gas wellbore," Energy, Elsevier, vol. 258(C).
    6. Deng, Jiewen & Peng, Chenwei & Su, Yangyang & Qiang, Wenbo & Cai, Wanlong & Wei, Qingpeng, 2023. "Research on the heat storage characteristic of deep borehole heat exchangers under intermittent operation mode: Simulation analysis and comparative study," Energy, Elsevier, vol. 282(C).
    7. Zhang, Sheng & Liu, Jun & Zhang, Xia & Wang, Fenghao, 2024. "Properly shortening design time scale of medium-deep borehole heat exchanger for high building heating performances with high computational efficiency," Energy, Elsevier, vol. 290(C).
    8. Hirvijoki, Eero & Hirvonen, Janne, 2022. "The potential of intermediate-to-deep geothermal boreholes for seasonal storage of district heat," Renewable Energy, Elsevier, vol. 198(C), pages 825-832.

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