>> the tank with water. You could use a header tank and use some gas
>> pressure each time to vent water to the header tank and thereby 
>> have
>> some local filling pressure. Not much though.

> 3. arrange a water pipe from the bottom of the drum tto another one,
> water filled & slightly elevated - open to atmosphere at its top.

That's exactly what I meant.
And the bottom drum can be completely sealed by whatever means are 
desired except for bottom water pipe and top Hydrogen pipe. Existing 
drums with brazed or welded fittings would work well.

This sort of gasometer would make a better bomb than some if things 
went wrong.
They shouldn't go wrong as there needs be no direct air access to the 
Hydrogen space. However, Murphy is, amongst other things, an arsonist.

Having a loose fitting bottom lid would allow the gasometer to become 
a water rocket if the need arose.

220l of Hydrogen at 1 atmosphere is about 10 Mol or 20 gram or about 
2500 Joule stoichiometrically combusted - which it wouldn't be. Say 
you managed 1000 Joule, which would be bad management.

1000 Joule = 1000 Watt second = ~ 100 kg.m.

100 kg 1m in the air or
30kg 3m in the air or
10 kg 10m in the air or ... .

Maybe bottom venting isn't such a good idea :-).
An eg 15 kg gasometer barrel lifting to 6m would be 'interesting'.

Now, at stoichiometric ratio ...
How long to Guy Fawkes Day?
Where's my electrolyser ? ....



            Russell


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