Brian,
It has been awhile since I fooled with this subject but there is a
considerable difference in volume between LOX and HP oxygen. There was a
LOX breathing unit used for Shuttle recovery a number of years ago and the
volume and wait of pressure containers moved the design to a LOX design for
long duration gas supply. Typically the air independent propulsion (AIP)
units are only affordable by the military...one was considered a long time
ago (SNAP if I remember correctly) for a Canadian oil exploration sub but
the design came to naught.
R/Jay
Respectfully,
Jay K. Jeffries
Andros Is., Bahamas
As scarce as the truth is, the supply has always been in excess of the
demand.
-Josh Billings
_____________________________________________
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brian Cox
Sent: Tuesday, October 28, 2008 3:50 PM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] sterling engine Swedish submarines
Jay,
I was thinking for a larger sub like Carsten's, if the engine
compartment was a seperate area and the waste heat could be put to good use
or disipated with heat exchangers it would an interesting way to go. Do you
know the oxygen gas volume difference between liquified O2 and 3000 psi O2?
I imagine it is pretty great. The cost of LO2 would be very expensive no
doubt.
Brian
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Jay K. Jeffries
Sent: Tuesday, October 28, 2008 3:31 AM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] sterling engine Swedish
submarines
Brian,
Oxygen handling is not a trivial issue. There are a number of dive
shops that have been laid waste by an O2 explosion and they were only
handling intermediate pressure oxygen (i.e. <2200 psi). Hazards are
compounded exponentially once you go above this pressure. Years ago at the
first NITROX Conference a NASA engineer made a great presentation on these
hazards and how to mitigate them. In a small package such as would be used
in a PSUB plant-size efficiency and waste heat rejection in the compartment
will become issues also with an implementation of a Sterling system. I keep
watching developments though.
R/Jay
Respectfully,
Jay K. Jeffries
Andros Is., Bahamas
As scarce as the truth is, the supply has always been in excess of
the demand.
-Josh Billings
_____________________________________________
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brian Cox
Sent: Tuesday, October 28, 2008 12:42 AM
To: Personal_Submersibles@Psubs. Org
Subject: [PSUBS-MAILIST] sterling engine swedish submarines
Hi All,
Has anyone seen the sterling engines that they are using in
the Swedish submarines now? It sounds like they have really come along
way. I wonder how far one could go using only High pressure oxygen rather
than liquid oxy ?
http://www.subsim.com/ssr/frank1.html
Check out link
Brian
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