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>Posted on 27 Oct 1995 at 19:59:53 by Christopher M. Parrett
>Gas Blending

>One of THE most requested tools in Abyss is a gas mixing system that does
>not rely on Partial pressure blending techniques. People are asking me to
>lay out a controlled proceedure to increase the likihood of being close to
>the mark on the first fill. As no one else has done this before, and I can't
>find it anywhere else myself, we decided to take it on a year ago. Much to
>my surprise it has been extremely difficult to get the math to reflect
>reality. With that in mind I decided to get as large a sample of real world
>mixes as I could to use as a baseline for compensation.

I assume the math is fine and that it is your models of
the processes that involve the creation and exchange of heat
that causes you trouble.

If the processes you are modeling are not reversible in the
thermoodynamic sense you sit there with unequalities and not
mathematical equalities.

I'd think you could push through most of this but I fear the user
would have to input a large number of variables to get this
machinery to output numbers close to target:
type of tank (incl. material, thickness of walls)
cooling bath (how high up is it on the tank,  what's it's temperature,
volume, rate of renewal), rates of gas transfer, heat transfer
etc etc ad infinitum.

So I do wonder how far you can push the code and expect
good results without scaring people off with an excessive
number of input parameters ?

john

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