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RE: [PSUBS-MAILIST]saturation diver lockout
One concern about argon is that if I go back with my drysuit filled with argon into the chamber and open the suit - the argon exhaust into the chamber gas.
And will be mixed with my clean heliox there.. no problem at one time.. but at many times - we reycle our gas - no problem to get the o2 or CO2 out - but no way to get the argon out. For this reason we will clean our drysuit from the argon outside the chamber with rebreather gas before we went in. And not use the argon on shorter dives.
Regards Carsten
"Jay K. Jeffries" <bottomgun@mindspring.com> schrieb:
> Øystein,
>
> There is a difference between sat diving and tech diving at depth with
> rebreathers. As you note, sat diving is VERY equipment intensive...many
> orders of magnitude over tech diving (which uses a lot of equipment by
> itself). Drysuits negate the need for a hot water system and suit and argon
> extends the exposure time in cold water with a dry suit by increasing the
> insulation effectiveness by about 50% over air (and about 300% over
> HeOX?can?t remember the exact number but you get the idea). The argon is
> not breathed just used for insulation augmentation in the suit. While the
> Norwegian government may have banned argon insulation for their oil patches,
> it is utilized around the world by various navies and tech divers. An even
> more effective insulation augmentation gas is sulfur hexafluoride, a denser
> gas with about 4x the effectiveness of air.
>
>
>
> In the early 90s, developed a suit, insulation package, and a tie-in to a
> small additional outside heat source that circulated warm water through a
> tube suit next to the skin similar to what the astronauts use for SEAL SDV
> members so that they could survive 12 hour exposures in Arctic waters. Also
> worked on parts of the associated 12-hr. mixed gas rebreather.
>
>
>
> Carsten?s method of mixed-gas rebreathers, drysuits, and argon is the ideal
> package size for use with his submersible. It will be great to see some of
> the finds that he makes with this system.
>
> R/Jay
>
>
>
>
>
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Øystein Skarholm
> Sent: Wednesday, February 14, 2007 8:56 AM
> To: personal_submersibles@psubs.org
> Subject: Re: [PSUBS-MAILIST]saturation diverlockout
>
>
>
> Yes, this is true if you wanna go sat diving on your own. But you will
>
> never be able to reach the criteria for diving in for example the
>
> north sea for the Norwegian gouverment or any of the oilcompanies up
>
> here. Argon in dry suits has been tested and found not approved years
>
> ago. When diving on trimix the gas is reclaimed, treated and heated
>
> befor it goes back to the divers. Actually the system these days are
>
> much more complicated then back in the 70.
>
> The biggest problemsduring sat diving is loss of hot water. Because of
>
> the Helium you breath you can risk freeze to death long time before
>
> you can get rescued if the sumarine looses its power.
>
>
>
>
>
> On 2/14/07, MerlinSub@t-online.de <MerlinSub@t-online.de> wrote:
>
> > I dont agree.. That's was true in the 70ies.
>
> >
>
> > Euronaut will fit for saturation diving. But without diver ropes and
> pipes.
>
> > No hot water for the divers suit.
>
> > With a new type of double-rebreather. And Argon in the suits. Undepentadly
> from the submarine-system. And that makes the remaining system inside the
> sub pretty small.
>
> >
>
> > :-o Regards Carsten
>
> >
>
> >
>
> > "Øystein Skarholm" <skarholm@gmail.com> schrieb:
>
> > > A complete system for sat diving is a pretty large system. And again
>
> > > if you thinking commercial then a submarine can no longer compete
>
> > > against a surface vessel. The number of crew during sat diving is
>
> > > large. And all of the requirements for backup and rescue is
>
> > > tremendous.
>
> >
>
> >
>
> >
>
> >
>
> >
>
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> --
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> Best Regards
>
> Øystein Skarholm
>
> www.ubat.no
>
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