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- W4386495222 abstract "ABSTRACT Underground hydrogen storage could provide buffer capacity to store the excess energy from renewable resources. A lined rock cavern (LRC) is one of the hydrogen geologic storage site options. It offers great flexibility because it does not rely on the existence of salt caverns, aquifer formations or depleted hydrocarbon reservoir fields. However, many important aspects have to be studied before its full-scale implementation, among them (1) the effect of spatial variation of rock mass properties and (2) hydrogen embrittlement on the steel lining. We present a numerical study on these two aspects by simulating field tests at a pilot LRC project. For the effect of rock heterogeneity, we assign a spatial variation of elastic properties based on the Gaussian covariance model. The results show a good agreement with the field measurements. The spatial correlation length of rock mass elastic properties only has a minor impact on the cavern surface deformation. Regarding hydrogen embrittlement, our simulations predict a significant hydrogen diffusion in the welded low alloy steel (S355) lining after ∼2 months of operation, which may cause hydrogen leakage and facilitate the hydrogen embrittlement. We show that advanced numerical models are powerful tools to ensure the safety of hydrogen storage in a LRC. INTRODUCTION Energy production from renewable sources such as wind turbines and solar cells has gained lots of attraction to reduce emissions of greenhouse gases and mitigate global warming (Pörtner et al., 2022). However, electricity from such energy sources has a strongly fluctuating nature, therefore requires storage options at sufficient scale to fulfil demand requirements (Osman et al., 2022). With the help of electrolyzer technology, the surplus electricity can be used to produce hydrogen that can be stored and used as a fuel when needed. Underground geologic storage of hydrogen enables significant storage cost reductions as well as buffer capacity to store this surplus energy generated from renewable resources (Hassanpouryouzband et al., 2021; Liebscher et al., 2016; Ozarslan, 2012; Tarkowski, 2019). The underground hydrogen storage also provides opportunities for its commercial usage in industry and transport (Lord et al., 2014)." @default.
- W4386495222 created "2023-09-07" @default.
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- W4386495222 date "2023-06-25" @default.
- W4386495222 modified "2023-10-16" @default.
- W4386495222 title "Numerical Study of Hydrogen Storage in Lined Rock Cavern and Implications of Hydrogen Embrittlement" @default.
- W4386495222 doi "https://doi.org/10.56952/arma-2023-0803" @default.
- W4386495222 hasPublicationYear "2023" @default.
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