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Multiphase flow modeling and energy extraction performance for supercritical geothermal systems

Author

Listed:
  • Feng, Guanhong
  • Wang, Yu
  • Xu, Tianfu
  • Wang, Fugang
  • Shi, Yan

Abstract

Beyond the critical point of 373.946 °C and 22.064 MPa, water presents in the supercritical state, which is of great potential for geothermal resource development. In this work, an improved EoS (Equation of State) module is developed for simulation in supercritical geothermal systems based on the structure of the TOUGH2 program. Compared to previous studies, this new module provides a more elaborate description of the multiphase flow behavior. A novel method is proposed, which is more accessible and physically reasonable for the flow between sub- and supercritical conditions. Moreover, the effect of pressure and temperature on relative permeability and capillary pressure is considered, which makes it smooth and continuous around the critical point.

Suggested Citation

  • Feng, Guanhong & Wang, Yu & Xu, Tianfu & Wang, Fugang & Shi, Yan, 2021. "Multiphase flow modeling and energy extraction performance for supercritical geothermal systems," Renewable Energy, Elsevier, vol. 173(C), pages 442-454.
    • Handle: RePEc:eee:renene:v:173:y:2021:i:c:p:442-454
    DOI: 10.1016/j.renene.2021.03.107
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    References listed on IDEAS

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    1. Xu, Tianfu & Yuan, Yilong & Jia, Xiaofeng & Lei, Yude & Li, Shengtao & Feng, Bo & Hou, Zhaoyun & Jiang, Zhenjiao, 2018. "Prospects of power generation from an enhanced geothermal system by water circulation through two horizontal wells: A case study in the Gonghe Basin, Qinghai Province, China," Energy, Elsevier, vol. 148(C), pages 196-207.
    2. Watanabe, Noriaki & Saito, Kohei & Okamoto, Atsushi & Nakamura, Kengo & Ishibashi, Takuya & Saishu, Hanae & Komai, Takeshi & Tsuchiya, Noriyoshi, 2020. "Stabilizing and enhancing permeability for sustainable and profitable energy extraction from superhot geothermal environments," Applied Energy, Elsevier, vol. 260(C).
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    Cited by:

    1. Silje Bordvik & Erling Næss, 2023. "Silica Nanoparticle Formation from Supercritical Geothermal Sources," Energies, MDPI, vol. 16(16), pages 1-18, August.
    2. Feng, Guanhong & Xu, Tianfu & Zhao, Yue'an & Gherardi, Fabrizio, 2022. "Heat mining from super-hot horizons of the Larderello geothermal field, Italy," Renewable Energy, Elsevier, vol. 197(C), pages 371-383.
    3. Yu Wang & Tianfu Xu & Yuxiang Cheng & Guanhong Feng, 2022. "Prospects for Power Generation of the Doublet Supercritical Geothermal System in Reykjanes Geothermal Field, Iceland," Energies, MDPI, vol. 15(22), pages 1-15, November.

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