Posted by JMOR on November 23, 2013 at 06:53:33 from (72.181.173.171):
In Reply to: Hydrogen power? posted by George Marsh on November 23, 2013 at 05:27:29:
Quoting Removed, click Modern View to see2.5 may be a good number, but not of much if any importance when considering a motor fuel. At atmos pressure you need a tank 3,000 times larger than for gasoline for the equivalent energy content. Compress it, you say.....fine, just factor in the volume & weight of 10,000 PSI tanks. Liquify it you say.......just factor in the -400 degree temps, tank insulation, and the fact that without a continuous external refrigeration source, it all MUST turn into vapor, whether you use it or not or else the pressure can't be contained. It is either burned off or released into the atmosphere.... unused. In the hydrogen BMW, the whole full tank is gone while sitting at the airport parking lot over just a 9 day air trip. There is much, much more to this than a dreamy-eyed number here & there. Much more than I know as well!
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