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Investigation of the Heat Transfer Performance of Multi-Borehole Double-Pipe Heat Exchangers in Medium-Shallow Strata

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Listed:
  • Wenjing Li

    (School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China)

  • Wenke Zhang

    (School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China)

  • Zhenxing Li

    (Hydrogeology Bureau of China National Administration of Coal Geology, Handan 056004, China)

  • Haiqing Yao

    (Shandong Zhongrui New Energy Technology Co., Ltd., Jinan 250101, China)

  • Ping Cui

    (School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China)

  • Fangfang Zhang

    (School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China)

Abstract

Just as the double-pipe heat exchanger is being utilized in an increasing number of applications, its research content is also deepening. For this paper, based on the air-conditioning cold and heat source project of a building in Handan, Hebei Province, a 300-meter medium-shallow well double-pipe heat exchanger was used for heating and cooling, and a corresponding heat transfer model was established. The changes of parameters such as the inlet and outlet temperature, heat exchange (with and without a temperature gradient), and borehole wall temperature distribution between a single borehole, double boreholes, and four boreholes over one year in medium-shallow wells were simulated and analyzed. By comparing the obtained experimental data and the simulation data, the accuracy of the heat transfer model was verified. This provides a theoretical basis for the further advancement of the project and lays the foundation for an in-depth study of multi-borehole double-pipe heat exchangers.

Suggested Citation

  • Wenjing Li & Wenke Zhang & Zhenxing Li & Haiqing Yao & Ping Cui & Fangfang Zhang, 2022. "Investigation of the Heat Transfer Performance of Multi-Borehole Double-Pipe Heat Exchangers in Medium-Shallow Strata," Energies, MDPI, vol. 15(13), pages 1-19, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4798-:d:852561
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    References listed on IDEAS

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    1. Cai, Wanlong & Wang, Fenghao & Chen, Shuang & Chen, Chaofan & Liu, Jun & Deng, Jiewen & Kolditz, Olaf & Shao, Haibing, 2021. "Analysis of heat extraction performance and long-term sustainability for multiple deep borehole heat exchanger array: A project-based study," Applied Energy, Elsevier, vol. 289(C).
    2. Li, Ji & Xu, Wei & Li, Jianfeng & Huang, Shuai & Li, Zhao & Qiao, Biao & Yang, Chun & Sun, Deyu & Zhang, Guangqiu, 2021. "Heat extraction model and characteristics of coaxial deep borehole heat exchanger," Renewable Energy, Elsevier, vol. 169(C), pages 738-751.
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    Cited by:

    1. Jianlong Shi & Wei Zhang & Mingjian Wang & Chunguang Wang & Zhengnan Wei & Dong Wang & Peng Zheng, 2023. "Heat Transfer Mechanism of Heat–Cold Alternate Extraction in a Shallow Geothermal Buried Pipe System under Multiple Heat Exchanger Groups," Energies, MDPI, vol. 16(24), pages 1-23, December.

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