Abstract
Fuel cell vehicles and trains (FCVs) are seen as a viable alternative to fossil fuel-powered vehicles, with the potential to help the automotive and transport industry grow sustainably. Because of their zero emissions, great efficiency, and diverse hydrogen sources, they are an ideal solution to climate change and the global energy issue. In this study, the simulation of releasing hydrogen from a moving vehicle inside a tunnel has been done. For this purpose, two scenarios have been considered. In the first one, it assumed that hydrogen propagates inside a tunnel without ignition and in the second approach, hydrogen released considered to be combusted. The effect of this combustion on the tunnel and train wall has been investigated. For this goal, two different mass flow rates of hydrogen were considered and results were compared together. Moreover, pressure contours have been shown to represent the overpressure phenomenon and it is resulted that in the area of hydrogen dispersion, there will be high pressure.
Highlights
As hydrogen fuel cell vehicle technology advances, it is evident that this mode of transportation will become increasingly widespread in the future
While hydrogen is released from the valve, the hydrogen concentration rises for as long as the hydrogen is released
Other experiments were performed by Kumar et al [11]to evaluate the influence of congestion and ventilation flow rates on the over-pressure produced from ignition of hydrogen stoichiometric clouds
Summary
As hydrogen fuel cell vehicle technology advances, it is evident that this mode of transportation will become increasingly widespread in the future. There is much less turbulence and the hydrogen rises to the ceiling where it forms layers of varying concentrations (stratification). Other experiments were performed by Kumar et al [11]to evaluate the influence of congestion and ventilation flow rates on the over-pressure produced from ignition of hydrogen stoichiometric clouds. Hao et al [14] has been done the experiments related to dispersion of hydrogen from fuel cell vehicles in confined spaces recently. Lowesmith et al [17] worked on the combustion of air hydrogen and methane mixtures with different ratios in the confined spaces and they investigated the explosion results. Computational fluid dynamics is utilized in this study to look into transient and steady-state hydrogen release, dispersion, and explosion in a tunnel for fuel cell moving vehicles
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