Hydrogen related risks within a private garage: Concentration measurements in a realistic full scale experimental facility

Data for the evaluation of hydrogen risks onboard vehicles: Outcomes from the French project drive

“…If the leakage is nonimpacting, the high momentum of the jet promotes dilution (I3b and I3c) and increases the volume of the mixing zone. Of particular interest is the very little dependency of the saturated concentration with the release flow rate for a downward jet: this could be interpreted using the theory of buoyant gaseous jets [12]. Note that the leakage may also appear under the vehicle or in the storage compartment.…”

LES modelling of hydrogen release and accumulation within a non-ventilated ambient pressure garage using the ADREA-HF CFD code

“…In order to present the results in a more appropriate way, the order of the sensors in the next figures is re-arranged to follow the "hydrogen route": as hydrogen is released from the release chamber, it first comes to sensor 16, then subsequently to sensors 14,13,1,4,6,7,8,9,10,12 (not all sensors are included in this study). Along the hydrogen route, the concentrations are generally expected to drop during the release phase and that can indeed be observed at the inset of Fig.…”

Experimental study of hydrogen releases in the passenger compartment of a Piaggio Porter

“…Such knowledge allows the development of measures to minimize the probability of an accident, and of methods to mitigate the consequences if an accident should occur. There have been studies published that quantify the risk related to the operation of a hydrogen powered engine car, for example in [2] and several experimental [3,4] and simulation [5,6] works concerning the study of hydrogen released from vehicles into confined or semi-confined enclosures such as garages and tunnels [7]. However, a few studies are published concerning the behaviour of a release inside a vehicle compartment [8,9].…”