The Ghost In The Machine wrote:
In sci.physics, Tony Wesley

wrote
on 18 Aug 2006 16:22:55 -0700
.com:

Robert Clark wrote:

I meant using cryogenic liquid hydrogen would make it easy to liquify
the water.
As noted by Cowan, 4 bar might be too high for a lightweight system. I
got this number from high performance fuel cells. They would work at 1
bar just not as efficiently.

Er, Bob, just how big is the H2 tank going to be?



The fuel tank can be highly pressurized and the hydrogen fed through a
regular, presumably. I for one don't see that as a problem although the
regulator might get rather cold. :-) (Same issue as with air
conditioners.) Of course that might be advantageous, as one can then
route the exhaust past it.


By "highly pressurized", I assume you mean a contained energy density of
LESS THAN ONE PERCENT of gasoline.

http://www.tinaja.com/glib/energfun.pdf



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