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Simulations of Hydrogen Dispersion from Fuel Cell Vehicles' Leakages Inside Full-scale Tunnel

Abstract

In this work, real scale experiments involving hydrogen dispersion inside a road tunnel have been modelled using the Computational Fluid Dynamics (CFD) methodology. The aim is to assess the performance of the ADREA-HF CFD tool against full-scale tunnel dispersion data resulting from high-pressure hydrogen leakage through Thermal Pressure Relief Device (TPRD) of a vehicle. The assessment was performed with the help of experiments conducted by the French Alternative Energies and Atomic Energy Commission (CEA) in a real inclined tunnel in France. In the experiments, helium as hydrogen surrogate has been released from 200 bar storage pressure. Several tests were carried out examining different TPRD sizes and release directions (upwards and downwards). For the CFD evaluation two tests were considered: one with downwards and one with upwards release, both through a TPRD with a diameter of 2 mm. The comparison between the CFD results and the experiments shows the good predictive capabilities of the ADREA-HF code that can be used as a safety tool in hydrogen dispersion studies. The comparison reveals some of the strengths and weaknesses of both the CFD and the experiments. It is made clear that CFD can contribute to the design of the experiments and to the interpretation of the experimental results.

Funding source: "Part of this research was funded from the Clean Hydrogen Joint Undertaking through grant agreement No 826193 (project HyTunnel-CS). The Joint Undertaking receives support from the European Union's Horizon 2020 research and innovation programme. This work was also supported by computational time granted from the National Infrastructures for Research and Technology S.A. (GRNET) in the National HPC facility - ARIS - under project ID pr014025 (H2TUN)."
Related subjects: Safety
Countries: France ; Germany
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/content/conference5886
2023-09-21
2024-11-12
/content/conference5886
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