[PSUBS-MAILIST] scrubber

Tue Nov 1 18:09:13 EDT 2016

Thanks Cliff,I have the same question, but after thinking about it today, I realize that the shape of the container is irrelevant.  I can treat it like a round scrubber with a fan at the end with an air space between the fan and absorbent bed.  I am just not sure if it is axial because the scrubber seems to be a mesh body.  I also did not pay much attention on my tour, I was a bit overwhelmed.Hank 

    On Tuesday, November 1, 2016 2:13 PM, Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Hank, don’t know all the detail on the Deepworker 2000 butwill convey what I know.  Maybe Phil willchime in with details.The system uses his O2 bellow add valve which bleeds 100% O2into the cabin based on a drop in barometric pressure from the time the hatchwas closed.  At the time of launch SOPcalls for them to pull a slight vacuum in the boat to assure the hatch o-ringis sealed and to make it easier to dog the hatch latches.  The last spec I saw on the DW 2000, the enduranceis 80 hours. There are two scrubbers (one redundant), each containing 12 lbs ofSodaSorb HP. There is also a BIBS system. They have O2 and CO2 monitors.  TheO2 bottles are externally mounted.  Sincehis life support endurance is 80 hours, I he should have in excess of 80 scf ofO2.  I don’t know how the Sodasorb is setup to filter, axial or radially nor do I know the type of blower he is using inthe scrubbers.  As long as the blower onthe scrubber is strong enough to circulate the cabin air through the filterevery hour or so, the 100% O2 that is blead into the cabin will mix with thecabin air due to molecular diffusion.I believe he uses the same basic life support system on allhis boats.  Phil’s paper on Life support http://www.psubs.org/design/lifesupport/lifesupport.pdfis a good read on how his bellows add system work and life support in general.When Phil let the PSub members dive his subs at theVancouver PSub Convention, I remember seeing the scrubbers and noting they werecompact but I was more focused on diving the DW 2000 so did not pay too much attentionto the scrubber design.  The two key things I would like to know is what is the makeand model of the blower he uses and is the filter oriented to pull the cabinair radially or axially through the Sodasorb HP.
Cliff
On Tue, Nov 1, 2016 at 7:13 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Hi All,Can anyone explain how the DW scrubber works?  How  is the air defused equally when the shape is irregular.   I want to copy the concept of a scrubber that fits tight to the hull to save space.   Thanks'Hank
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