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Exploiting seafloor hydrothermal energy through optimized closed-loop heat extraction

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  • Yi, Gaowei
  • Zhang, Da
  • Zhang, Wenlong
  • Li, Yan
  • Gong, Liang

Abstract

The Seafloor hydrothermal offer abundant renewable thermal energy. However, the complexity of geology and hydrothermal reactions makes harnessing this energy a significant challenge. This paper proposes a novel closed-loop thermal energy extraction system specifically designed for seafloor hydrothermal environments. This system incorporates high-porosity metal foam as backfill material, a design that seeks to uphold structural integrity in marine settings while potentially enhancing heat exchange efficiency. We've constructed an experimental platform that marries fracture porous media flow analysis with heat transfer measurements, simulating the layout and operation of heat pipes in heterogeneous geological environments. Furthermore, we've developed numerical simulations and computational models customized to hydrothermal conditions, focusing on optimizing key parameters of heat pipe design, such as backfill layer parameters, depth, and fluid flow rate. Our experimental results indicate that fractures and large porosities can increase local heat transfer rates by approximately 42 %. Utilizing high-porosity metal foam as the backfill material, with a thickness 1.1 times the diameter of the heat pipe, can boost heat exchange efficiency by up to 26.71 %. Under optimal conditions (flow rate 0.6 kg/s, drilling depth 200 m), our mathematical model estimates a heat exchange rate of 216.72 kJ/s, potentially generating approximately 75.85 kW. h of electricity per heat pipe. In conclusion, this study sheds new light on the utilization of seafloor hydrothermal energy, fostering the development and application of marine renewable energy.

Suggested Citation

  • Yi, Gaowei & Zhang, Da & Zhang, Wenlong & Li, Yan & Gong, Liang, 2025. "Exploiting seafloor hydrothermal energy through optimized closed-loop heat extraction," Renewable Energy, Elsevier, vol. 242(C).
    • Handle: RePEc:eee:renene:v:242:y:2025:i:c:s0960148125000667
    DOI: 10.1016/j.renene.2025.122404
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    References listed on IDEAS

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    1. Cui, Yuanlong & Zhu, Jie & Meng, Fanran & Zoras, Stamatis & McKechnie, Jon & Chu, Junze, 2020. "Energy assessment and economic sensitivity analysis of a grid-connected photovoltaic system," Renewable Energy, Elsevier, vol. 150(C), pages 101-115.
    2. Huang, Yibin & Zhang, Yanjun & Yu, Ziwang & Ma, Yueqiang & Zhang, Chi, 2019. "Experimental investigation of seepage and heat transfer in rough fractures for enhanced geothermal systems," Renewable Energy, Elsevier, vol. 135(C), pages 846-855.
    3. Yang, H. & Cui, P. & Fang, Z., 2010. "Vertical-borehole ground-coupled heat pumps: A review of models and systems," Applied Energy, Elsevier, vol. 87(1), pages 16-27, January.
    4. Bhattacharya, Saptarshi & Pennock, Shona & Robertson, Bryson & Hanif, Sarmad & Alam, Md Jan E. & Bhatnagar, Dhruv & Preziuso, Danielle & O’Neil, Rebecca, 2021. "Timing value of marine renewable energy resources for potential grid applications," Applied Energy, Elsevier, vol. 299(C).
    5. Cai, Wanlong & Wang, Fenghao & Chen, Chaofan & Chen, Shuang & Liu, Jun & Ren, Zhanli & Shao, Haibing, 2022. "Long-term performance evaluation for deep borehole heat exchanger array under different soil thermal properties and system layouts," Energy, Elsevier, vol. 241(C).
    6. Liu, Gang & Zhou, Chunwei & Rao, Zhenghua & Liao, Shengming, 2021. "Impacts of fracture network geometries on numerical simulation and performance prediction of enhanced geothermal systems," Renewable Energy, Elsevier, vol. 171(C), pages 492-504.
    7. Wang, Yang & Voskov, Denis & Khait, Mark & Saeid, Sanaz & Bruhn, David, 2021. "Influential factors on the development of a low-enthalpy geothermal reservoir: A sensitivity study of a realistic field," Renewable Energy, Elsevier, vol. 179(C), pages 641-651.
    8. Sun, Zhi-xue & Zhang, Xu & Xu, Yi & Yao, Jun & Wang, Hao-xuan & Lv, Shuhuan & Sun, Zhi-lei & Huang, Yong & Cai, Ming-yu & Huang, Xiaoxue, 2017. "Numerical simulation of the heat extraction in EGS with thermal-hydraulic-mechanical coupling method based on discrete fractures model," Energy, Elsevier, vol. 120(C), pages 20-33.
    9. Ma, Yuanyuan & Li, Shibin & Zhang, Ligang & Liu, Songze & Liu, Zhaoyi & Li, Hao & Shi, Erxiu & Zhang, Haijun, 2020. "Numerical simulation study on the heat extraction performance of multi-well injection enhanced geothermal system," Renewable Energy, Elsevier, vol. 151(C), pages 782-795.
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