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>Can anyone help me with some formulae?
>
>I'd like to be able to convert liters to cubic feet (tank volumes) and vice
>versa, but can't find the formulae anywhere.
Hmmm, lessee... a foot is (12 inches x 0.0254 m) 0.3048 cm.
Cube this, and you get 0.028316846592 cubic meters. Since 1 cubic meter is
1000 liters, divide this by 1000 and you get 28.316,846,592 liters per cubic
foot. So, roughly, your 80 cubic foot tank at 200 bar will hold
80*28.316/200 liters, that is 11.3264 liters. So, 80 footers are 11 liters...
So, liters = cubic feet * 28.316 / pressure (in bars).
If I'm not mistaken, 1 bar is 14.7 psi or 1 kg/cm3 (gee, it's soooo much
easier in metric).
For you spreadsheet fans, here's a model...
A1:'Tank capacity B1:'Tank pressure C1:'Tank pressure D1:"Liters
A2:"(cubic feet) B2:"(PSI) C2:"(bar) D2:"at 1 bar
A4: B4: C4:+B4/14.7 D4:+A4*28.316846592/C4
Gentlemen, start your engines! (it's amazing how many cars are named after
spreadsheets: Lotus, Quattro, Excel)...
---- ==================================================== ----
I prefer to give a bit of my liberty to an elected government
rather than to unaccountable corporations.
* Marc Dufour * [\] ACUC 6 31874 * http://WWW.CAM.ORG/~mdufour *
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