RE: [PSUBS-MAILIST] sofnolime

["Alec Smyth" <Asmyth@changepoint.com>]

Adam,

I'm just building my scrubber. What are you using to monitor the O2 and CO2? I'm curious if you've come across any economical analyzers you'd recommend. Or are you bilding your own?

thanks,

Alec

-----Original Message-----
From: Adam and Teresa Lawrence [mailto:adteleka@in-tch.com]
Sent: Tuesday, September 10, 2002 3:08 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] sofnolime


This link gives the operating manual for the Clelia submersible. The life
support section gives some detail into the absorption of CO2 and the
consumption of oxygen.
www.hboi.edu/marineops/pdf/clelia_manual.doc
I am in the middle of constructing a life support system. My approach is to
construct an air tight area that is same area as the inside of  the sub.
Then run some experiments on my self using the scrubber and O2 system I
designed, all the while monitoring the concentrations of O2, CO2 and the
atmospheric pressure. The experiment will also be done at several different
temperatures.  To me, this is the only way to validate the scrubbers
performance and the performance of the chemical reaction. Sort of like
testing your hull before you attempt going all the way.

Adam



----- Original Message -----
From: "Alec Smyth" <Asmyth@changepoint.com>
To: <personal_submersibles@psubs.org>
Sent: Tuesday, September 10, 2002 12:27 PM
Subject: RE: [PSUBS-MAILIST] sofnolime


> Yes, in the life support paper on PSUBS there is a reference to Simon
Fraser University research that boiled down to a very simple bottom line...
1 pound of absorbent lasts 4 person hours. Its much more complex than that,
with things like temperature and humidity influencing the number, but that
was reportedly a consistent finding. The study I think applied to Sodasorb,
so I'm not sure if there is a difference with Sofnolime.
>
> Also refer to ABS rules as far as how many hours are required overall --
generally 72hrs.
>
> rgds,
>
> Alec
>
> -----Original Message-----
> From: Steve McColman [mailto:steve_mccolman@hotmail.com]
> Sent: Tuesday, September 10, 2002 11:38 AM
> To: personal_submersibles@psubs.org
> Subject: [PSUBS-MAILIST] sofnolime
>
>
> Is there a formula to calculate the amount of absorbent you need?
> Air space + number of people + length of dive = amount of absorbent