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Re: [PSUBS-MAILIST] car-deep cycle
Here's a low end Lung Powered Scrubber for a diving bell (which can be used
in a manned sub):
http://www.amronintl.com/diving/products.cfm?id=298
Please note the vendor's note on the the purpose of the unit:
Begin Quote
"The Model ER-216-000 ensures the scrubbing of carbon dioxide in gases
breathed by personnel in a confined environment in the event of the loss of
the normal ventilation or regeneration system."
End Quote
A lung powered scrubber is not intended as a replacement of the scrubber
system. It is designed as an emergency device.
This brings us back to my first post. A sound scrubber design should account
for sufficient electrical power to run for the designed mission time plus 72
hours. I am not picking on you Al, but in my opinion, dependency on a lung
powered scrubber to save on the cost of batteries is not a sound approach.
While building submersibles and operating them is not rocket science, it is
not a walk in the park either. If there is something to learn from the
deaths of the two people aboard the JSL in the 70's is that diving
submarines is most dangerous when people assume that nothing will go wrong
and take unnecessary risks.
Respectfully,
Hugo
--- Begin Message ---
Sodasorb is used all the time in scuba rebreathers which we breath from
directly. What we typically do in rebreather scrubbers is to fill them in a
slight breeze to help blow off the dust. Some rebreather scrubbers have
pads
in line to also cut down on the dust. It's not that big of a deal and a lung
powered scrubber...it can easily be down with PVC pipe. Just do a search on
the web for homebuilt rebreathers to get an idea. Try this website for
instance: http://home1.gte.net/doctrbob/CCO2.htm or even this one:
http://www.atlimp.com/home.htm
It's not rocket science....
Al Secor ARS: WA3PWX Scuba Instructor SSI PDIC TDI
http://www.geocities.com/SubDiverI
Quoting Hugo Marrero <HMarrero@hboi.edu>:
> Yes we have them in our sub, they cost about $2000 each. I would not
> recomend breathing through a straight hose as the sodasorb is a caustic.
> Inhaling directly through a hose you will inhale soda sorb particles which
> can then hurt your respiratory system. The Lung Powered Scrubbers are
> specially designed to prevent inhalation of particles and reduce breathing
> fatigue.
>
> Thse devices are designed as a last resort in case your scrubber fails
> during and emergency situation and you are stranded on the bottom.
>
> Hugo
>
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