Quote:
Originally Posted by jamesqf
The real problem with compressed H2 is the tank. From a quick search, the air in a typical scuba tank weighs about 6.5 lbs.
H2 is about 1/14 as dense as air, and you get about 1/2 lb of H2 in a tank that weighs 30 libs or so.
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Have you read
my other post ?
I calculated out you could get about 6,95 kWh in a SCUBA.
Haven't tried it in practice though, so if you have, let me know.
I got the SCUBA tank idea from
USH2. If it won't work, I guess I could always change it for a CNG tank, but I don't see any structural difference between the 2, so I assume both should work.
As for the energy needed and the compression used (3000 instead of 10 000 psi): using less compression means less energy needed (and less energy loss as well). Obviously it still remains inefficient from this standpoint, but on the other hand it has no (polluting) exhaust gases and you could use renewable electricity to make the hydrogen.