Sorry, been kinda busy today and tomorrow. The figure I see online for reckoning energy stored in compressed air @ 20 bar (1 bar = 14.503 psi, 20bar = 290 psi) is 0.26 MJ/kg of air. To really reckon the energy stored in compressed air, we can start from the ideal gas law (PV=nRT) and work from there, if we want to go from the ground up, which is what I did back when I was wondering "just how much 'bang' is there in a 80 or 120 gal tank?"
Edited by NVDave 6/14/2007 04:46
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