Numerical Study of Flow Characteristics of Pressure Relief Valve based on a Structure for a Liquid Hydrogen Storage System

초록

As abnormal weather phenomena are rising due to global warming, hydrogen energy is gaining attention as an alternative to fossil fuels. However, owing to high risk concerns, the widespread adoption of gaseous hydrogen has been slow compared to that of batteries. In this study, we investigated pressure relief valves that are used in liquid hydrogen storage systems designed to mitigate the high-pressure risks associated with gaseous hydrogen. We compared the bellows-type and straight-line designs using computational fluid dynamics (CFD) and confirmed that the straight-line design exhibited superior performance. Based on experimental data obtained from the straight-line configuration in a liquid nitrogen environment, a 3D model was created. CFD analysis was performed to determine whether the fluid flow within the valve was laminar or turbulent. The experimental results indicated that the flow was more consistent with turbulent flow, leading to the conclusion that the fluid behavior within the valve is turbulent. Consequently, future research will be conducted under turbulent flow conditions.

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