Quote:
Originally Posted by RedDevil
but if a little bit of hydrogen leaks and mixes with the cabin air, that mixture will be explosive from anywhere between 4% and about 85% hydrogen.
You can't smell it or sense it in any other way. A few liters of the mixture could blow the glass out, a whole cabinfull would destroy other cars nearby.
It really isn't safe to carry a homemade hydrogen installation inside the cabin.
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. . . it is difficult to achieve a combustible mixture short of a gross failure in the valving or piping. This is due to the rapid rate of diffusion and the fact that it is lighter than air by a large margin. A leak of several liters per second in a car cabin with nothing more than a window cracked open just about eliminates the possibility of reaching 4% for the lower flammability limit.
How do I know this? From personal experience. I work with hydrogen all the time. It's dangers are overblown much like nuclear "waste".