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>Posted on 2 Mar 1996 at 17:50:02 by Bill Brooks

Bill,  I'm trying to understand rebreathers so I found this very
interesting:

>Exhales gas first goes into the counter lung where there will be some
>cooling and condensation, from there it is routed to the cannister.  At our
>cannister the exhaled gas is mixed with the incoming feed gas near the
>inlet.  Inside the cannister there is another cannister of smaller diameter
>that is filled with sofnolime.  The gas travels between the inside of the
>large outer cannister and the outside of the smaller inner cannister before
>it enters the bottom of the inner cannister.  The gas then passes upward
>through the 'sorb to finally exit the scrubber and flow to the diver's
>mouth.


I'm not sure if you feel like explaining your design in public but
I have a few question.

Do you have a valve then to get rid of the water that builds up in
the counterlung ?

Why is the new gas added ahead of the scrubber (it requires more
surface area no and increases the breathing resistance I would
think ? ): to avoid as best you can condensation within
the scrubber,  get a good mix before the sensor takes it reading,
other ?


>We plan to mount the sensor near the open end of the smaller inner cannister
>that holds the 'sorb.  This area is heated by the reaction of the chemical
>and the co2.  If we mount the sensor such that it has no connection to the
>cold outer cannister and it is able to conduct heat away from the inner
>cannister that should minimize condensation.

Put an electric blanket on it ?

john

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