[PSUBS-MAILIST] CO2 Sorb

[via Personal_Submersibles]

We'll be looking into Lithium Hydroxide for emergency use in P-VI as it is longer lasting per unit of volume, more efficient, and more temperature tolerant. It is also expensive by comparison. However, the sheer volume of material will be smaller, so easier to store.
Vance



-----Original Message-----
From: via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Tue, Aug 16, 2016 3:55 pm
Subject: Re: [PSUBS-MAILIST] CO2 Sorb

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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