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Numerical Simulation of Liquid Hydrogen Evaporation in the Pressurized Tank During Venting

Abstract

CFD modelling of liquified hydrogen boiling and evaporation during the pressurised tank venting is presented. The model is based on the volume-of-fluid method for tracking liquid and gas phases, and Lee’s model for phase change. The simulation results are compared against the liquid hydrogen evaporation experiment performed by Tani et al. (2021) in a large-scale pressurised storage tank, using experimental pressure dynamics and temperatures measured in gas and liquid phases. The study focuses on tank pressure decrease and recovery phenomena during the first 15 s of the venting process. The model sensitivity have been studied applying different Lee’s model evaporisation-condensation coefficients. The CFD model provided reasonable agreement with the observed pressure and gas phase temperature dynamics during the liquid hydrogen storage depressurisation, using Lee’s model coefficient =0.05 s-1. Experimentalists’ hypothesis about particularly intensive boiling in the proximity of thermocouples was supported by close agreement between simulated and experimental saturation temperatures obtained from pressure dynamics.

Funding source: This research has received funding from the Clean Hydrogen Partnership under grant agreement No. 101101381 (ELVHYS). The project is supported by the Clean Hydrogen Partnership and its members. UK participants in Horizon Europe Project ELVHYS are supported by UKRI grant No.10063519 (University of Ulster) and No.10070592 (Health and Safety Executive).
Keywords: Liquid Hydrogen
Related subjects: Safety
Countries: United Kingdom
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/content/conference5873
2023-09-21
2024-12-22
/content/conference5873
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