Kirk Bauer
Registered
I was trying to conceptualize how much air is inside a standard Aluminum 80 cylinder at 3000psi.
Based on an old thread (Untangling cubic feet, litres, PSI, bar for scuba tanks and RMV / SAC calculations) it says that the actual volume inside of an Aluminum 80 is approximately 11 liters. But 11 liters is approximately 0.4 cubic feet. If that's all true then the tank holds air equal to about 27 times its actual volume, if the air was at normal atmospheric pressure. In other words, there is approximately 300 liters of air inside an 11 liter cylinder.
But that math must be incorrect, because atmospheric pressure is about 15psi, and the tanks has 3000psi, which is approximately 200 times greater. So by this math, the cylinder is holding 200 times its volume in air.
Where am I going wrong in my math and understanding?
Based on an old thread (Untangling cubic feet, litres, PSI, bar for scuba tanks and RMV / SAC calculations) it says that the actual volume inside of an Aluminum 80 is approximately 11 liters. But 11 liters is approximately 0.4 cubic feet. If that's all true then the tank holds air equal to about 27 times its actual volume, if the air was at normal atmospheric pressure. In other words, there is approximately 300 liters of air inside an 11 liter cylinder.
But that math must be incorrect, because atmospheric pressure is about 15psi, and the tanks has 3000psi, which is approximately 200 times greater. So by this math, the cylinder is holding 200 times its volume in air.
Where am I going wrong in my math and understanding?