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I'd pretty much figured that out, but wondered would it not be better
to continually flush the system as in a semi-closed system? I figure
you'd see a saw-toothed profile of the N2/He2 gradient, being the best
right after you purge the system. Do most designs have the O2 rich
feed coming into the diver's mouth as directly as possible and the
burp/exhaust to ambient valve on the return from the diver (before the
O2 is added)? Too bad there isn't an easy way to separate/capture the
N2, but that's why we have lightning and fertilizer factories! --DD
______________________________ Reply Separator _________________________________
Subject: Re: Rebreather from stab jacket (was: Re: A.P. Valves bcd)
Author: kevink (INET.KEVINK) at DIAMOND
Date: 12/19/95 11:51 AM
>David B. Drake EDS/SATURN Infrastructure 8-320-4190 on GMnet
Spring >Hill, TN USA Internet: saturn.ddrake05@gm*.co* > >P.S.
How do you get rid of the inert gas buildup in a completely closed
>rebreather system when doing IWR. I assume the amount of Nitrogen/He that
>will come out of your body will be more than significant to the size of
your >counter lungs and reduce off-gassing efficiency...
This is handled through a very simple expedient. You must "purge" the
system at regular intervals in order to keep the inert gas ratio at a
reasonable level. I forget what the interval (and it may be different
for various rebreathers).
-- Kevin --
kevink@ap*.co*
It is hard to disagree with a pro-survival decision,
It is even harder to engage in prolonged arguments
with someone who consistently makes anti-survival decisions.
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