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jaap · 4th February 2008, 07:14

Quote: (Originally Posted by diverreb)

Anyone know a simple formula for finding approximate tank pressure at a given temperature? Pretty sure there's one out there, but it's been a while and I can't find it. Example: Tank has 3000 psi at 45 degrees F. What will the pressure be at 75 degrees F, 85 degrees F, etc. Does that vary with the mix of gases? Air vs O2 vs He.....

Thanks,

Richie

Using imperial units is not my thing...

But have a look here: http://antoine.frostburg.edu/chem/se.../realgas.shtml

Just type in whatever units you like. Use N2 to approximate air. If you want to approximate various mixtures you could make linear combinations yourself from the data your get.

4th February 2008, 07:14	#5 (permalink)
jaap Normal people worry me Current Rebreather/s: Classic Kiss Other CCR RB80 / Clone Ray Other SCR Home Build Other Rebreather/s: Other CCR RB80 / Clone Ray Other SCR Home Build Join Date: Jun 2005 Location: Stockholm Sweden Posts: 451	Re: Heat Formula Question Quote: (Originally Posted by diverreb) Anyone know a simple formula for finding approximate tank pressure at a given temperature? Pretty sure there's one out there, but it's been a while and I can't find it. Example: Tank has 3000 psi at 45 degrees F. What will the pressure be at 75 degrees F, 85 degrees F, etc. Does that vary with the mix of gases? Air vs O2 vs He..... Thanks, Richie Using imperial units is not my thing... But have a look here: http://antoine.frostburg.edu/chem/se.../realgas.shtml Just type in whatever units you like. Use N2 to approximate air. If you want to approximate various mixtures you could make linear combinations yourself from the data your get. __________________ My initials: JAAP
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