A high pressure hydrogen tank that holds more then 3000 cu ft
(uncompressed gas volume) _/*cannot*/_ be stored indoors without very
special ventilation equipment, etc. A fuel cell passenger car with a
range of 300 miles holds just shy of 2000 cu ft, so a truck would be
over that limit and could not be parked indoors in any normal facility.
See table H-1 and H-2:
https://www.nrel.gov/docs/fy15osti/60948.pdf
Even under 3000 cu ft, the requirements are still insanely strict for
indoor H2 storage. For example, you can't have any ordinary electrical
equipment or wiring anywhere in that space. _Everything_ electrical has
to be "hydrogen safe". This means it has to be explosion proof. No
ordinary garage meets this requirement. Explosion proof light fixtures,
explosion proof switches, and explosion proof electrical outlets. Thus,
no fuel cell cars are allowed to park inside any ordinary garage or
parking garage.
Having worked for many years with hydrogen in both liquid and gaseous
forms, it is obvious that H2 fuel cell vehicles are a non-starter from a
safety standpoint. H2 is not at all like gasoline. Especially in
enclosed spaces. It burns with an invisible flame in sunlight. It
detonates in the widest concentration range imaginable, 18% to 59% in
air. (Not just flames, an explosion.) The flammability limits are 4% to
94%.
Imagine a car wreck with invisible flames. Think about that for a
moment. You can walk right into a fire with no warning whatsoever.
Realize that a fuel cell car wreck might very well detonate. This is a
very real possibility, especially in an underpass or a tunnel or a
parking garage.
Bill D.
On 9/9/2021 5:25 AM, EVDL Administrator via EV wrote:
On 7 Sep 2021 at 2:56, Lawrence Rhodes via EV wrote:
Since you are not allowed to park a fuel cell car indoors why on earth
would you use one in a mine
Can you please provide a reference for this?
I'm no FCV fan nor am I an H2 evangelist, but I haven't been able to find
any documentation for such a law anywhere on the web. I can't even find a
reference to ventilation requirements, although that would certainly make
sense.
Most of what I find that discusses hydrogen vehicle safety matters is fairly
old - twelve years ago and earlier - and seems somewhat speculative.
On 8 Sep 2021 at 10:21, paul dove via EV wrote:
Why? If you design it to run for 8 hours then at the end of the work
day charge overnight.
I know nothing about mines, but what if the mine runs 24 hours a day?
I have a vague recollection of reading years ago that there exist(ed?) cable
powered electric mining trucks. I might be remembering wrong. Regrettably
the web seems to be so saturated with discussion of this one that I haven't
been able to find a reference to much else. Maybe someone else can.
David Roden, EVDL moderator & general lackey
To reach me, don't reply to this message; I won't get it. Use my
offlist address here : http://evdl.org/help/index.html#supt
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