Re: Stored energy calculation for Pneumatic pres

> To calculate stored energy for pneuamatic pressure testing there
>are two formulas. One by Floue Danial... as per this

>I wonder which one is correct...anyone came across the similer
>problem..or any other trustable formulas....
I suspect the one involving the ratio of specific heats is for adiabatic (rapid) pressure changes and the other is for isothermal (slow) pressure changes. Taking another guess, the formulas look to be developed for specific use by two different companies, and may have built in safety factors or limits accordaing to company usage. Assuming you've done the arithmetic correctly, they're probably both right but apply to different circumstances.

I have no idea what you're trying to do, but I don't think I'd do it, if it involves pressurization of a large volume of gas and I didn't understand exactly where those formulas are meant to be used and ahere they came from.

Christopher Wright P.E.    |"They couldn't hit an elephant at
chrisw@skypoint.com        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)