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RE: [PSUBS-MAILIST] Sodium Polyacrylate



There are is no need for Kort nozzles, alcohol (not good in a closed atmosphere), condensation traps, etc…just keep it simple like a scrubber.  There are two formats for passing gas through a bed: axial flow and radial flow.  Axial flow is simpler with a fan at one end of a tube blowing thought a screen to restrain your media (moisture and/or CO2), your media, another screen on the other end, and a spring or some means to put slight pressure on the media (this minimizes ‘channeling’…shortcuts through the media that severely reduces its effectiveness).  In a radial flow scrubber the gas is forced down a perforated center tube, gas passes outward through the media, and then through an outer larger perforated tube.  There also has to be some means to maintain some pressure on the media to minimize channeling.  The radial flow scrubber while more complex is the more effective design due to less resistance of gas flow caused by a shorter path and in a CO2 scrubber better heat balance to maintain the chemical reaction.  Moisture absorption can be included in a CO2 scrubber by including a layer of moisture absorbent chemical and increasing the flow path to account for the added material.  Care must be taken with all of the materials mentioned in this thread to minimize chemical dust that will get in the respiratory system and cause distress.  Most of the CO2 absorbent materials do not play well with water and can be even explosive (LiOH).

 

Respectfully,

Jay K. Jeffries

Andros Is., Bahamas

 

Natura nihil fit in frustra

- Nature does nothing in vain

 

 

 

-----Original Message-----
From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of MerlinSub@t-online.de
Sent: Wednesday, September 06, 2006 5:41 PM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Sodium Polyacrylate

 

I just staring my test with the Co2 scrubber

partly filled with Silikagel cristalls.

 

regards Carsten

 

"Smyth, Alec" <Alec.Smyth@compuware.com> schrieb:

> George,

> If you build a prototype dehumidifier I'll be happy to test it for you

> in the sub. I think condensation accounts for a lot of the maintenance

> load, as everything basically ends up soaking wet.

> thanks,

>

> Alec

>

>           -----Original Message-----

>           From: owner-personal_submersibles@psubs.org

> [mailto:owner-personal_submersibles@psubs.org] On Behalf Of George

> Slaterpryce

>           Sent: Wednesday, September 06, 2006 3:24 PM

>           To: PSUBS Mailing List

>           Subject: [PSUBS-MAILIST] Sodium Polyacrylate

>          

>          

>           Ok, I can't find a pre-fab Hummidity filter made with this stuff

> anywhere online... I know that they are made... but my google-fu is not

> strong on this search.

>            

>           SO...

>            

>           I thought about how you might make one.

>            

>           First and foremost, used product will have to be switched out

> from time to time, so the main filter component will have to be easy to

> get to and switch out.

>            

>           Second to promote condensation and from there condensation

> inside the filter unit itself it'll have to be slightly cooler than the

> enviroment outside the filter... Problem... small refrigiration units

> are expensive (energy use wise)

>            

>           So, what I think one should do is to use a pipe with a fan on

> the intake side and a normal air filter on the outflow side. that

> inbetween the intake and outflow has a copper coil with a simple

> fountain (12vdc) pump that pushes rubbing alchohol through the pipe at

> speed. Probably accellerated via a kort like nozzle off the pump. It

> wouldn't cool well enough for a air conditioner, but it should promote a

> cool atmosphere inside the filter which would promote water to condense

> within the filter. In the center of the coil which is inside the pipe

> would be a tissue bag full of sodium polyacrylate. That once used can

> simply be pulled out and replaced.

>            

>           I'm thinking of taking a break from BugEye II to prototype this.

> Anyone interesting in providing a testbed if I do?

>            

>            

>           George H. Slaterpryce III

>           www.captovis.com

>

> The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it.

>

 

 

 

 

 

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