Indeed, H2 is very buoyant in air and rises extremely quickly.
However, this means that it collects and concentrates at the high points
of the ceiling in an enclosed space. Typically, the garage door opener
is also in that space, as well as light fixtures, etc. The garage door
opener has
Typical high pressure cylinders must be re-certified every 5 years.
There are specific carbon fiber reinforced cylinders that can fall under
DOT regulation (SP-16320) which allows a longer span between
re-certification.
The typical re-certification procedure requires a physical inspection,
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On 9 Sep 2021 at 14:52, Peri Hartman via EV wrote:
> I suspect, the hydrogen storage wont get any smaller whereas we can
> realistically expect the energy density - both by weight and volume -
> to continue to increase for batteries.
I think that you're right.
Ten years ago, even 5, FCVs had
Hello Dave,
You raise some interesting questions. Out of curiosity, I did a
search on Mirai Hydrogen Tank Replacement Cost and came up with a
couple of things:
1) In this link:
https://insideevs.com/news/326312/2016-toyota-mirai-do-not-refuel-after-2029/
There is a picture from a 2016 article
Seems to me that a massive battery is cheaper than a massive fuel cell,
certainly cheaper to operate.
My PGP public key: https://vanderwal.us/evdl_pgp.key
September 7, 2021 8:20 PM, "George Mullineaux via EV" wrote:
> But just charging batteries will not fill the need of such a large truck
>
Thanks for these exceprts, David. I think I'll keep this around next
time someone (outside this list) thinks FCEVs are the next big thing.
It may be that economy of scale could ultimately make FCEVs affordable.
But, I suspect, the hydrogen storage wont get any smaller whereas we can
Thanks Bill. That's the information I was looking for.
I was curious about whether this was mentioned in the owner manuals of FCVs.
so out of curiosity I downloaded the Mirai manual from the web
https://www.startmycar.com/toyota/mirai/info/manuals/2021
It's 560 pages! I thought at first that
