[PSUBS-MAILIST] co2 scrubber

[Cliff Redus via Personal_Submersibles]

Hank, ABS rules says your scrubber needs to operate for 72 hour past normal
duty on the emergency battery bank.  The issue for me was initially I was
using a strong blower which did great for keeping the CO2 ppm level low but
pulled to much current so that with my 100 Ah emergency battery, I could
not make the full time.  I went back and changed out the blower to one that
pulled less current and was able to meet the requirement and still do a
good job on CO2 concentration..

You might want to do test where you test your emergency battery bank
endurance with the hotel load for current to make sure you meet this
constraint.  Does not have to be a manned test.

Cliff


On Tue, Feb 14, 2017 at 2:50 PM, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> I just completed more scrubber testing.  With both scrubbers running and
> me breathing into the re-breather scrubber, I bottomed out a 508 ppm.  If I
> turn off the radial scrubber it starts to climb immediately.  If I stop
> breathing into the re-breather scrubber, the level rises immediately.  The
> re-breather has a fan running also.  The humidity level in Gamma is 66% and
> the temp is 15C .  My conclusion is that I need to increase the humidity
> level.  The humidity level in Gamma rose from 48% to 66% during the test.
> Also at this temperature, Like Emile said, the radial scrubber needs to
> warm up of at least 15 minutes.  The re-breather scrubber with me breathing
> into it starts to work almost immediately.  I also think my fan is to fast
> on my radial scrubber at 24 V, I can run it on 12V and see what happens.
> The radial filter did not slow the airflow as I expected.
> The speed control on the cooling\ circulation   fan is an absolute dream.
> Hank
>
>
> On Tuesday, February 14, 2017 8:31 AM, Sean T. Stevenson via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Just another comment regarding the cabin air - the temperature needs to be
> maintained within limits of 14°C to 30°C (57.2°F - 86°F).  Water vapour
> production is 1.81 kg (4 lb) per person per day.
> Sean
>
>
> On February 13, 2017 2:14:08 PM MST, Alan via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Thanks for the suggestions.
> I think I'll take Sean's advice & keep my humidity control device separate
> from the scrubber intake.
>    Using another fan & directing air through a desiccant filter may be the way
> to go. Plenty of humidity in Auckland to experiment with, it's 92% at the moment.
> Alan
>
> Sent from my iPad
>
>  On 14/02/2017, at 5:36 AM, River Dolfi via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>  I don't see what the aversion to using desiccant is. Silica gel desiccant are rechargeable, so wouldn't be expensive at all to utilize. After they are loaded with water and the indicator changes color, you simply bake it in an oven and it's good as new.
>
>
> ------------------------------
>
>  Personal_Submersibles mailing list
>  Personal_Submersibles at psubs.or!
>  g
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> ------------------------------
>
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20170214/1ad3d374/attachment.html>