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Experimental investigation of the vertical helical borehole heat exchanger (VHBHE) wrapped with shape-stabilized phase change material

Author

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  • Zhou, Z.
  • Wang, Y.
  • Tao, Y.
  • Wu, Gang
  • Yu, Chunyi

Abstract

Phase change materials (PCMs) can enhance the performance of borehole heat exchangers (BHEs) when used as backfill. Encapsulating PCMs around the BHE wall reduces the risk of leakage, yet systematic experimental and thermodynamic studies remain limited. This work conducted a full-scale experiment on a vertical helical BHE (VHBHE) integrated with shape-stabilized PCM (SSPCM) and evaluated its thermal response under simulated building load conditions. Experimental results showed that low heating power levels (700 W–800 W) led to inefficient utilization of SSPCMs. Additionally, under standard operational cycling (8 h–16 h start-stop ratio), heating power variations had minimal impact on soil thermal recovery, with a maximum temperature difference of 0.13 °C. Complete recovery of the soil temperature field occurred within one week of cyclical operation. The method also demonstrates a favorable incremental cost-benefit ratio, with an average of 1.32 and a maximum of 2.09. Thermal analysis revealed that SSPCM reduces the thermal resistance of the ground heat exchanger but increases exergy loss. This study provides valuable insights for the broader adoption of PCMs as backfill materials for BHEs.

Suggested Citation

  • Zhou, Z. & Wang, Y. & Tao, Y. & Wu, Gang & Yu, Chunyi, 2025. "Experimental investigation of the vertical helical borehole heat exchanger (VHBHE) wrapped with shape-stabilized phase change material," Energy, Elsevier, vol. 336(C).
    • Handle: RePEc:eee:energy:v:336:y:2025:i:c:s0360544225041209
    DOI: 10.1016/j.energy.2025.138478
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    References listed on IDEAS

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    1. Pu, Liang & Xu, Lingling & Zhang, Shengqi & Li, Yanzhong, 2019. "Optimization of ground heat exchanger using microencapsulated phase change material slurry based on tree-shaped structure," Applied Energy, Elsevier, vol. 240(C), pages 860-869.
    2. Wang, Yongzhen & Li, Chengjun & Zhao, Jun & Wu, Boyuan & Du, Yanping & Zhang, Jing & Zhu, Yilin, 2021. "The above-ground strategies to approach the goal of geothermal power generation in China: State of art and future researches," Renewable and Sustainable Energy Reviews, Elsevier, vol. 138(C).
    3. Song, Xianzhi & Shi, Yu & Li, Gensheng & Yang, Ruiyue & Xu, Zhengming & Zheng, Rui & Wang, Gaosheng & Lyu, Zehao, 2017. "Heat extraction performance simulation for various configurations of a downhole heat exchanger geothermal system," Energy, Elsevier, vol. 141(C), pages 1489-1503.
    4. Liao, Ziming & Huang, Guangqin & Zhuang, Chunlong & Zhang, Hongyu & Cheng, Lei & Gan, Fei, 2024. "Research on the thermal balance of a novel independent heat extraction-release double helix energy pile in long-term operation," Renewable Energy, Elsevier, vol. 236(C).
    5. Kong, Minsuk & Alvarado, Jorge L. & Thies, Curt & Morefield, Sean & Marsh, Charles P., 2017. "Field evaluation of microencapsulated phase change material slurry in ground source heat pump systems," Energy, Elsevier, vol. 122(C), pages 691-700.
    6. Wang, J.L. & Yan, Ting & Tang, Xin & Pan, W.G., 2025. "Design and operation of hybrid ground source heat pump systems: A review," Energy, Elsevier, vol. 316(C).
    7. Pasquier, Philippe, 2018. "Interpretation of the first hours of a thermal response test using the time derivative of the temperature," Applied Energy, Elsevier, vol. 213(C), pages 56-75.
    8. Shortall, Ruth & Davidsdottir, Brynhildur & Axelsson, Guðni, 2015. "Geothermal energy for sustainable development: A review of sustainability impacts and assessment frameworks," Renewable and Sustainable Energy Reviews, Elsevier, vol. 44(C), pages 391-406.
    9. Galgaro, A. & Di Sipio, E. & Carrera, A. & Dalla Santa, G. & Escudero, A. Ramos & Cuevas, J.M. & Pasquali, R. & Sanner, B. & Bernardi, A., 2022. "European and municipal scale drillability maps: A tool to identify the most suitable techniques to install borehole heat exchangers (BHE) probes," Renewable Energy, Elsevier, vol. 192(C), pages 188-199.
    10. Zhang, Wenke & Yang, Hongxing & Lu, Lin & Fang, Zhaohong, 2013. "The analysis on solid cylindrical heat source model of foundation pile ground heat exchangers with groundwater flow," Energy, Elsevier, vol. 55(C), pages 417-425.
    11. Yang, Weibo & Xu, Rui & Yang, Binbin & Yang, Jingjing, 2019. "Experimental and numerical investigations on the thermal performance of a borehole ground heat exchanger with PCM backfill," Energy, Elsevier, vol. 174(C), pages 216-235.
    12. Han, Chanjuan & Yu, Xiong (Bill), 2016. "Sensitivity analysis of a vertical geothermal heat pump system," Applied Energy, Elsevier, vol. 170(C), pages 148-160.
    13. Gao, Yuxue & Zhang, Wenke & Zhu, Xiuli & Zhang, Shanshan & Zhang, Zenggang & Cui, Ping & Yu, Mingzhi, 2025. "Investigation on the heat transfer characteristics of the U-tube and the coaxial tube medium-shallow borehole heat exchangers," Renewable Energy, Elsevier, vol. 248(C).
    14. Liu, Qinggong & Tao, Yao & Shi, Long & Huang, Yi & Peng, Yuanling & Wang, Yong & Tu, Jiyuan, 2023. "Experimental investigations on the thermal performance of a novel ground heat exchanger under the synergistic effects of shape-stabilized phase change material and nanofluid," Energy, Elsevier, vol. 284(C).
    15. Faizal, Mohammed & Bouazza, Abdelmalek & Singh, Rao M., 2016. "Heat transfer enhancement of geothermal energy piles," Renewable and Sustainable Energy Reviews, Elsevier, vol. 57(C), pages 16-33.
    16. Cao, Ziming & Zhang, Guozhu & Liu, Yiping & Zhao, Xu & Li, Chenglin, 2022. "Influence of backfilling phase change material on thermal performance of precast high-strength concrete energy pile," Renewable Energy, Elsevier, vol. 184(C), pages 374-390.
    17. Yang, Weibo & Xu, Rui & Wang, Feng & Chen, Shikun, 2020. "Experimental and numerical investigations on the thermal performance of a horizontal spiral-coil ground heat exchanger," Renewable Energy, Elsevier, vol. 147(P1), pages 979-995.
    18. Bao, Xiaohua & Qi, Xuedong & Cui, Hongzhi & Tang, Waiching & Chen, Xiangsheng, 2022. "Experimental study on thermal response of a PCM energy pile in unsaturated clay," Renewable Energy, Elsevier, vol. 185(C), pages 790-803.
    19. Bi, Yuehong & Wang, Xinhong & Liu, Yun & Zhang, Hua & Chen, Lingen, 2009. "Comprehensive exergy analysis of a ground-source heat pump system for both building heating and cooling modes," Applied Energy, Elsevier, vol. 86(12), pages 2560-2565, December.
    20. Zarrella, Angelo & Capozza, Antonio & De Carli, Michele, 2013. "Analysis of short helical and double U-tube borehole heat exchangers: A simulation-based comparison," Applied Energy, Elsevier, vol. 112(C), pages 358-370.
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