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Date: Sun, 3 Nov 1996 20:29:14 -1000 (HST)
From: Richard Pyle <deepreef@bi*.bi*.ha*.or*>
To: Bill Brooks <seasport_scuba@su*.ne*>
Cc: "Mr. Dude" <heyydude@pi*.co*>, techdiver@terra.net
Subject: Re: CO2 scrubber

> >From my reading of the USN recommendations for breathers their is a
> reduction in scrubber duration with depth only in cold water.  This to me
> implies that the problem has to due with temperature loss in the scrubber
> bed due to the increased mass of cold gas flowing through the scrubber bed
> at great depth.
> 
> It is not due to any increased CO2 production or a reduction of CO2
> absorbtion with pressure but rather due to the loss in bed temp.

O.K., now this makes some sense.  The colder water chills the exhaled 
gas, which results in exacerbated cooling of the scrubber, which decreases 
its efficiency.  Also with cooler water, you'll get more condensation on 
the upstream side of the loop (exhale side), which could also have an 
effect on absorbent efficiency.

Rich

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