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Re: [PSUBS-MAILIST] Re: life support system designs and forced air co2 scrubb...
Lee,
Normally one has several canisters that can be
interchanged on the scrubber as they become used up. I don't know about
sodasorb but SofnoLime has a shelf life of three years if it's kept dry, so the
canisters have to be sealed from moisture in storage.
I only plan to use a scrubber for
emergencies. The designer of the K-350 recommends that it be surfaced
every hour and the hatch opened to exchange the air. If that is done,
there is no need for CO2 scrubbing or supplemental O2.
When you do use a scrubber and supplemental O2
properly, you don't have any change in cabin pressure. The O2 that you
release is breathed in and converted to CO2 and then absorbed in the
scrubber. Done properly, you can gauge the need for scrubbing or O2
replenishment with a barometer. If your cabin pressure goes up, your
letting in to much O2. If it goes down, your over scrubbed. Over
scrubbing has no ill effect but to much O2 can be dangerous.
You'll find many discussions about this in the
archives.
Hope this helps, Dan H.
----- Original Message -----
Sent: Sunday, April 13, 2003 12:47
PM
Subject: Re: [PSUBS-MAILIST] Re: life
support system designs and forced air co2 scrubb...
hello and again thanx for the info.
is their a way that
the co2 absorbent be charged coz if over three days ill need 50 lbs of
sodasorb then that means in a average dive of 3 hrs i wold stiill need alot.
also how long could i stay submerged b4 i would need to surface to releive
cabin pressure due to 02 being bled in wen the sensor says cabin needs more
o2.. thanx lee