I need a little help please regarding tank volume at pressure.
Y'all run some pretty weird "units" regarding pressure tanks.
Some based on a standard non astmatic non smoking non hungover firefighter not running to fast and not just sleeping, and what he in-/exhales in minutes given hes not scared poopless.
And that one confuses me a lot!
30 min tank, 45min tank, 60min tank
Why not simply state the actual measured volume of the tank and the actual pressure?
Like: I got a 9 liter tank at 300 bar = 9x300=2700 liters of air in the tank, akin to 2 gallon tank (0.267cf) at 4500psi = 2 gallon (0.267cf) x 4500psi = (4500x0.267)/14.7=81.73cf
https://www.engineeringtoolbox.com/compressed-air-storage-volume-d_843.html
Now to my point: Air does not compress at a linear scale it actually starts to take up space as pressures goes up so there is not the volume you thought in that tank!
At 300 bar /4500 psi we're off by almost 10% meaning that there is 10% less useable air in there than the gauge indicates.
This tank calculator takes this into account and gives actual useable air/fills.
https://sye.dk/airgun/index.php
Might be of use to some?
Y'all run some pretty weird "units" regarding pressure tanks.
Some based on a standard non astmatic non smoking non hungover firefighter not running to fast and not just sleeping, and what he in-/exhales in minutes given hes not scared poopless.
And that one confuses me a lot!
30 min tank, 45min tank, 60min tank
Why not simply state the actual measured volume of the tank and the actual pressure?
Like: I got a 9 liter tank at 300 bar = 9x300=2700 liters of air in the tank, akin to 2 gallon tank (0.267cf) at 4500psi = 2 gallon (0.267cf) x 4500psi = (4500x0.267)/14.7=81.73cf
https://www.engineeringtoolbox.com/compressed-air-storage-volume-d_843.html
Now to my point: Air does not compress at a linear scale it actually starts to take up space as pressures goes up so there is not the volume you thought in that tank!
At 300 bar /4500 psi we're off by almost 10% meaning that there is 10% less useable air in there than the gauge indicates.
This tank calculator takes this into account and gives actual useable air/fills.
https://sye.dk/airgun/index.php
Might be of use to some?
