[PSUBS-MAILIST] CO2 Sorb

Tue Aug 16 22:25:01 EDT 2016

Cliff,We will know for sure aftet running some more tests, but we do know that Pisces VI was the perfect hull of all the Pisces and a similar Alvin version 1 hull was rated for 10,000 fsw. We will no longer be going to SwRI as there testing facility was recently down rated to 2,500psi. We are now going to Annapolis for Penn States testing facility. Thank you,Scott Waters

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-------- Original message --------
From: Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> 
Date: 08/16/2016  6:49 PM  (GMT-06:00) 
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
Subject: Re: [PSUBS-MAILIST] CO2 Sorb 

Scott, I note that you are shooting for 8000 fsw operating depth on Pisces VI but Busby table 4.1, page 83 sites operating depth of boat at 6500 fsw.  Has the boat been modified to get to 8000 ft or was this a error in the table?
BTW, let me know when you plan to test the hull at SwRI in San Antonio, I use to work there.  I would love to attend the test and help any way I can.
Regards
Cliff

On Tue, Aug 16, 2016 at 6:13 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Thanks Hank,unfortunately Scott would need a big escape pod for all the crew.If he had a fly out rov he could use it for gaining video footage ofhis dives. I think Scotts submarine hobby is getting out of hand. lol.Happy Birthday for the other day Scott.Alan

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On 17/08/2016, at 10:47 am, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Alan,There is a solution for rescue at 1,000 feet,, escape pod :-)   I think the DW has enough absorbent between the two scrubbers for 36 hr plus they always dive with a second DW on deck.  They throw all the absorbent away after every dive I am told.  Hank 

    On Tuesday, August 16, 2016 4:42 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Does anyone know much about the Deep Worker scrubbers?The new ones aren't cylindrical, they are an oblong shape that fits the contourof the subs hull either side of your legs. There are 2 of them with fans on the front. I cant see how you would change out the absorbent during a dive as there would not be much room when you are in there. Or do they hold the full amount in both of them.If this is so, I presume they run one at a time, so is the redundant scrubber sealedin any way prior to use?Alan  

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On 17/08/2016, at 10:12 am, Scott Waters via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

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

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-------- 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

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