RE: [PSUBS-MAILIST] More Dehumidifier

George,

The fistful of beads that I mentioned previously, were sufficient to collect all of the exhaled moisture for several hour long dives. Take a look at Tom Rose’s homebuilt rebreather site (should be able to find via Google as I don’t have a link conveniently available). A submersible should have a scrubber capability installed along with a source for oxygen in the event of a stranding, 72 hours is the ABS standard if I remember correctly and is easily doable. Adding a desiccant module to this equipment to run when the scrubber is not needed is relatively trifle affair to build. As Joe notes, the low powered fan is the only moving equipment and the whole affair is not that large.

R/Jay

Respectfully,

Jay K. Jeffries

Andros Is., Bahamas

Natura nihil fit in frustra
- Nature does nothing in vain

From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of George Slaterpryce
Sent: Thursday, September 07, 2006 8:41 AM
To: PSUBS Mailing List
Subject: [PSUBS-MAILIST] More Dehumidifier

The more I think about it, the more I think that you can dispense with the sodium polyacrylate.

Natural condensation can be captured in a well or bottle of some sort and doesn't necessarrily have to be held in a gel like form. The sodium polyacrylate would work wonders in a filter situation (I.E. made part of a normal air filter device) but if you're going to build a purpose built dehumidifier, then all you need to do is chill the surfaces you want to have condensation and then capture the water resulting from that in a well later. Again, it wouldn't have to be as powerful as an air conditioning unit, just cooling enough to keep it's internal condensation catalyst surfaces cool.

George H. Slaterpryce III
www.captovis.com