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<p>Hydrogen charging stations are continuously being developed, and the focuses is on hydrogen pressure vessels (type I), one of the components of hydrogen charging stations. In pressure vessel design, increasing the storage capacity with safety considerations is a significant factor. In this study, a hemispherical dome was redesigned into an ellipsoidal one to maximize storage capacity using the commercial finite-element analysis program ANSYS Workbench. As the aspect ratio of the ellipsoidal dome increased, the magnitude of the stress in the dome from the working pressure increased. An optimal autofrettage pressure was applied to reduce the magnitude of stress and satisfy the quantitative target life requirements set by FIBA TECH. The structural integrity of the designed pressure vessel was evaluated based on the stress categories defined in ASME SEC VIII Div. 3 for each pressure vessel location.</p>

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Design and structural safety evaluation of an ultra-high-pressure hydrogen vessel (type I) with maximum capacity

  • 期刊论文

  • 发表日期：

    2025年1月31日

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  • Taeyoung Kim,
  • Hwa Young Kim

摘要

Hydrogen charging stations are continuously being developed, and the focuses is on hydrogen pressure vessels (type I), one of the components of hydrogen charging stations. In pressure vessel design, increasing the storage capacity with safety considerations is a significant factor. In this study, a hemispherical dome was redesigned into an ellipsoidal one to maximize storage capacity using the commercial finite-element analysis program ANSYS Workbench. As the aspect ratio of the ellipsoidal dome increased, the magnitude of the stress in the dome from the working pressure increased. An optimal autofrettage pressure was applied to reduce the magnitude of stress and satisfy the quantitative target life requirements set by FIBA TECH. The structural integrity of the designed pressure vessel was evaluated based on the stress categories defined in ASME SEC VIII Div. 3 for each pressure vessel location.