An Experimental Study Dedicated to Wind Influence on Helium Build-up and Concentration Distribution Inside a 1 m 3 Semi-confined Enclosure Considering Hydrogen Energy Applications Conditions of Use

Hydrogen energy applications can be used outdoor and thus exposed to environmental varying conditions like wind. In several applications, natural ventilation is the first mitigation means studied to limit hydrogen build-up inside a confined area. This study aims at observing and understanding the influence of wind, on light gas build-up, in addition. Experiments were performed with helium as releasing gas, in a 1-m 3 enclosure equipped with ventilation openings, varying wind conditions, openings location, release flow rate; obstructions in front of the openings to limit effects of wind were studied as well. Experimental results were compared together and with the available analytical models.