Re: [CAD_CAM_EDM_DRO] OT: Cubic Feet in a Compressed Gas Cylinder?

It depends on the compressability of the gas which is largely a function of
it's atomic mass. As an example Hydrogen (H2) , Helium (He)] molecules have
a low deviation from linear compression. "Large" Molecules (Co2, O2, N203)
have a very non-linear compressability curve that is a function of both
pressure and temperature.

The accepted reason for this behavior is the amount of potential energy
stored in each molecule, a concept similar to Inertia. (Ford Explorers are
harder to stop than Mazda Miatas)

----Original Message Follows----
From: "Tim Goldstein" <timg@...>
Reply-To: CAD_CAM_EDM_DRO@egroups.com
To: <CAD_CAM_EDM_DRO@egroups.com>
Subject: [CAD_CAM_EDM_DRO] OT: Cubic Feet in a Compressed Gas Cylinder?
Date: Sat, 12 Aug 2000 23:10:58 -0600

Totally off topic, but I though someone on the list might know how to figure
this.

I am looking to be able to calculate the number of cubic feet of gas at
standard atmospheric pressure that are in a cylinder at any given time. The
2 scenarios are:

If I know the rated capacity of a cylinder at a given pressure How do I
calculate the remaining cubic feet at a different pressure. As an example,
if I have a cylinder that is rated to hold 219 cubic feet at 2080 psi, how
many cubic feet does it hold at 500 psi or any other pressure?

If I know the internal volume of a cylinder how can I calculate the capacity
in cubic feet at 100 psi? As an example, if I have a cylinder that has a
calculated internal volume of 3.5 cubic feet, how much gas can it hold at
100 psi.

TIA,

Tim
[Denver, CO]


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