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Re: new holland hydrogen tractor


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Posted by Bob M on June 30, 2009 at 11:33:19 from (151.190.254.108):

In Reply to: Re: new holland hydrogen tractor posted by mjbrown on June 30, 2009 at 04:45:16:

Very simply it cannot! Rather hydrogen is an SOB to both store and to handle.

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To achieve any reasonable storage density the stuff must be pressurized to 3,000 - 5,000 psi or higher. Or it must be compressed then cooled and maintained at insanely low temperatures around -425 degF. (Incidentally both compressing and cooling processes consume a big chunk of energy themselves...)

Hydrogen gas passes through fittings and gaskets that are tight to all other compressed gases. It’ll "soak" through many cast metals. (The tubing and fittings you get at Home Depot or NAPA are no good with hydrogen!)

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I worked with the stuff many years ago at a GM plant (compressed hydrogen was used in a manufacturing process). Fire insurance stipulated compressed H2 bottle storage be on an elevated pad located at least 100’ from the nearest building. Distribution piping had to be run outdoors above the roof – inside piping was limited to vertical drops directly over the process. Multiple automatic safety shutoff and isolation valves were required - we found these items to be a constant source of leaks.

Hydrogen was a maintenance staff and insurance underwriter's nightmare.


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