[PSUBS-MAILIST] Scrubber size

[Steve McQueen via Personal_Submersibles]

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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