[PSUBS-MAILIST] Scrubber size

[David Colombo via Personal_Submersibles]

Steve thanks for the advice. It could get messy in a change out. I could
practice while sitting in the sub for the 12 hr test. (my wife says to me
what are you going to do for 12 hours?)
I just shrugged my shoulders?

Best Regards,
David Colombo

804 College Ave
Santa Rosa, CA. 95404
(707) 536-1424
www.SeaQuestor.com



On Mon, Dec 14, 2020 at 6:41 AM Steve McQueen via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Dave, From a design standpoint I went with the wasteful media approach. I
> don't see myself diving often enough to worry about the waste. I made my
> scrubber volume as large as the installation footprint allowed. I didn't
> want to worry about changing the media anymore than needed. It still ended
> up being a trade off as I think I have to change my media out once or twice
> to have 72 hour capacity.
>
> However you do it imagine changing the media while sitting in the sub.
>
> Steve
>
>
>
> On Sun, Dec 13, 2020 at 10:14 PM David Colombo via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Hi Guys, I was following Jon's thread and thought how appropriate.  I am
>> building a scrubber for the VAST sub. The housing I acquired was a carbon
>> filter used in the grow industry.  With an interior screen core for the air
>> to flow thru to the sodasorb core to the outside screen. The volume of this
>> space holds 3.6 lbs of carbon. Not sure if the weight per volume of the
>> sodasorb is exactly the same, but if it is that chamber would produce about
>> 14.4 hours of absorption. I'm am thinking that I am going to cut the unit
>> in half. My thinking is that for a typical day of diving, 14 hrs seem a bit
>> excessive and I would be wasting  a lot of sorb.  With pre packaged,
>> vacuumed bags I can carry what would be required to meet ABS guidelines.
>> One of my concerns though is that with the compactness of the VAST sub with
>> a reduced volume of sorb, would the heat generated be greater than with
>> more sorb, thereby also increasing the humidity buildup.
>> I am hoping to get some experience feedback from other small owners, and
>> what they have used volume wise of the sorb for a typical day of diving.
>> The co2 unit I am using measures humidity as well as co2 ppm.
>> Attached are pictures of the unit ready to have the fan attached.
>> Best Regards,
>> David Colombo
>>
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