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David, In your instance, fuel cells would be more applicable since you
should have oxygen and hydrogen. Sterling power plants are very
inefficient as compared to other liquid powered engines. Both fuel cells
and Sterling engines are still cost prohibitive. 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 David
Bartsch Although not propulsion
related, Hydrogen generators are becomming more popular in use with automobiles
to improve fuel mileage...Could such a set up be used to generate oxygen for
use aboard a small sub to increase dive duration if the hydrogen could be
expelled? Sounds like a small version of an o2 generator.
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 _____________________________________________ 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 ? Check
out link Brian You
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