Sabine Attinger, Helmholtz Centre for Environmental Research

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Felipe De Barros, University of Southern California

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Gabrielle De Lannoy, KU Leuven

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Marco Dentz, IDAEA-CSIC

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Matthew Farthing, US Engineer Research and Development Center

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Efi Foufoula-Georgiou, University of California, Irvine

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Hadi Hajibeygi, TU Delft

Title: Building Confidence in Underground Hydrogen Storage

Underground hydrogen storage (UHS) for energy supply-demand management is a relatively new topic compared to the natural gas storage. It is gaining increasing interest due to the ‘hope’ that hydrogen may indeed be the missing link of ‘scalable’ low-carbon energy system. Successful deployment of UHS depends on reliable performance analysis, among others, which depends on rigorous understanding of the relevant cyclic hydromechanics processes at various scales. To address this, we present a multiscale experimental-numerical framework for UHS, addressing the thermo-chemical properties at molecular scale, trapping mechanisms at micro-meter scale, and its performance and recoverability in continuum reservoir scale. The nonlinear, time-dependent mechanical response of the host rocks is also addressed, with the focus on model construction and parameter calibration under uncertainty, including field validation. Emphasizing the importance of reliable performance assessments under uncertainty and heterogeneity, some key knowledge gaps in this evolving technology will be also addressed.

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