Re: [PSUBS-MAILIST] Hydrogen Peroxide

["D. Blake" <dblake@bright.net>]

Pat:
Yeah, I think the idea of using liquid O2 would best be left to the larger
cruising/live-aboard type of sub for emergency backup.  I guess that is
where my mind has been lately ie. day-dreaming about bigger than usual subs.
The comment you made about limiting your excursions because of the need to
take a pause for the cause was insightful and something I really had not
considered.  It sure make's sense, and really does illustrate the difference
between someone who has been there/done that, and someone that is still
trying to get a handle on it all.  I appreciate your feedback.  Oh by the
way, check out:
http://kirson.com/liquid.htm   They have systems that will supply O2 for up
to 11-days!!

TTYL,
Big Dave

-----Original Message-----
From: Captain Nemo <vulcania@interpac.net>
To: personal_submersibles@psubs.org <personal_submersibles@psubs.org>
Date: Friday, June 23, 2000 3:39 PM
Subject: Re: [PSUBS-MAILIST] Hydrogen Peroxide


>
>----- Original Message -----
>From: "D. Blake" <dblake@bright.net>
>To: <personal_submersibles@psubs.org>
>Sent: Friday, June 23, 2000 5:52 AM
>Subject: Re: [PSUBS-MAILIST] Hydrogen Peroxide
>
>
>> "Hey Pat:
>> Every once in a while at the clinic I work at, we find ourselves
admitting
>a
>> client that is on oxygen 24/7 which is really beyond the scope of our
>> facility, but because they are mentally ill we sometimes make
exceptions."
>
>Hey, big guy, I didn't know you were in medicine.  Learn something new
every
>day.
>
>>" Anyway, sometimes they come in with a big ol' bottle of liquid O2
>attached
>> to some sort of apparatus that regulates the stuff so that it lasts for
>days
>> on end!"
>
>Yeah, I'm sure it would.  I guess the difference in capacity per cubic foot
>of each container would be relative to the density variable between liquid
>and gas, which is (what?).  OK you chemists out there: what's the number?
>
>"As a social work intern, I worked for short periods of time in
>> nursing homes and witnessed people who were dependent on this type of
>> therapy and as a consequence had survived years beyond what they normally
>> would have without it."
>
>Interesting...
>
>> "This string has peaked my curiousity.  I think we need to investigate
the
>> possibilities of at least emergency O2 in the area of respiratory
>therapy."
>
>Well, it would sure last longer: which could come in handy if one were
>trapped on the bottom waiting to be found and rescued, for instance.  I
>think if I were going to run some kind of AIP using on-board tank-stored
>oxydizer, liquid would be the way to go.  There's other possibilities,
>too...
>
>>" You know, check out the mechanics involved with such a device to see how
>> difficult it would be to replicate ie. reverse engineering, or at least
>the
>> cost of off-the-shelf equipment.  Let me know what you think."
>
>There was a place called AIRCO in California ten years ago that sold
welding
>gasses and such; they also handled liquid air, oxygen, nitrogen, and stuff
>like that.  I took a quick look at what was involved; wasn't really too
high
>tech.  The liquid is kept in a Dewar jar (kind of a tank-in-a-tank "thermos
>bottle" affair).  I think there was some kind of intermediate tank or the
>like where the liquid turned to gas and from that point on it was like
using
>gaseous O2.  The usually expected valves, gauges, plumbing and such, of
>course.
>
>Liquid O2 does have potentials for exotic setups I think.  In my sub, even
>on tanked gaseous O2 the real limiting factoid is how long I can go before
>I've got to use the lavatory, or just get tired of being inside a little
>metal chamber.  But in a bigger boat; or one running AIP; I can see where
>liquid O2 could have advantages.
>
>I still aint going anywhere near pure Hydrogen Peroxide, though!
>
>VBR,
>
>Pat Regan
>
>
>