[PSUBS-MAILIST] CO2 Sorb

Tue Aug 16 18:12:13 EDT 2016

This is for Pisces VI. With rescue missions easily taking 2 to 3 days to assymble, I wanted the extra allowance. There is enough space in the cockpit to handle the extra sorb. On Trustworthy, it is a different story. Lol
Thank you,Scott Waters

Sent from my U.S. Cellular® Smartphone

-------- Original message --------
From: Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> 
Date: 08/16/2016  5:03 PM  (GMT-06:00) 
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Subject: Re: [PSUBS-MAILIST] CO2 Sorb 

I'm not sure how you're doing with your weight budget, but the Sodasorb weight really can become a space and weight issue when smaller boats go for compliance with the 72 hour rule. I know there's a competing product that's something like a pre-impregnated fabric instead of granules. Sorry, I can't recall the brand name. But it would be interesting to compare the weight and volume implications.

Thanks,

Alec
On Tue, Aug 16, 2016 at 3:54 PM, via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Thanks Cliff. I was also running the numbers on Pisces VI. We will have the following for 1 pilot and 3 observers for a 8 hour mission time and 5 day emergency use

*400 cuft O2 outside hull emergency use (five 80cuft tanks)

*160-81 cuft O2 inside hull for up to 8hr mission use (two 80cuft bottles allowing for full discharge)

*144 lbs sodasorb emergency use (three 48lb jugs)

*12 lbs sodasorb for up to 8hr mission use (two scrubbers loaded)

Thank you,

Scott Waters

>  -------Original Message-------

>  From: Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org>

>  To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>

>  Subject: Re: [PSUBS-MAILIST] CO2 Sorb

>  Sent: Aug 16 '16 14:14

>

>  Scott, ABS  uses  a value of 0.115 lbm CO2  generated per hour per

>  occupant.  Sotasorb HP specification says it can absorb 41% CO2 by

>  weight.  This comes out to 3.56 Persons-hours per pound of SodaSorb HP

>  which is close the number Alec posted.  ABS rules call for full life

>  support for 72 hours plus normal duty time.  If you assume normal duty

>  time is 8 hours, then the life support system would need to last for

>  80 hours.  For one person this would give 22.5 lbs of SodaSorbHP and

>  for two, 45 lbs for this duration.

>

>  Actual consumption rate is dependent on a lot of parameters, such as

>  temperature, humidly, mass of occupants and design of scrubber to

>  mention just a few.

>

>  Cliff

>

>  On Tue, Aug 16, 2016 at 11:02 AM, via Personal_Submersibles

>  <personal_submersibles at psubs.org> wrote:

>

>  > Hey guys, Just doing a safety check. What is the rough amount of CO2

>  > sorb that is needed per occupant per day (normally measured in

>  > weight)? I have a 48lb jug in Trustworthy which I know is enough for

>  > 2 people for 3 days. I am just planning on putting it in premeasured

>  > sealed bags for better storage and was wondering about how much does

>  > it actually take.

>  >

>  > Thank you,

>  > Scott Waters

>  > _______________________________________________

>  > 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/20160816/5c3fb2f3/attachment-0001.html>