Re: [PSUBS-MAILIST] CNG power for subs

[irox <irox@ix.netcom.com>]

Hi Brian,

the main issue with gasoline/petrol is that it's heavier than air.
This is a major issue for submarines since the pressure hull will
fill up with volatile gases.  Both diesel and CNG give off volatile
gases, but since it's lighter than air they will vent off rather
than collect in the hull.

CNG marine vessels:
http://www.brettandwolffllc.com/ngmvessels.html

Cheers,
 Ian.

-----Original Message-----
>From: Brian Cox <ojaivalleybeefarm@dslextreme.com>
>Sent: Jul 27, 2010 11:57 AM
>To: "Personal_Submersibles@Psubs. Org" <personal_submersibles@psubs.org>
>Subject: [PSUBS-MAILIST] CNG power for subs
>
>Hi All,   Hope everybody had a good time at the convention !   Congrats
>Vance on your new aquisition !
>
>CNG for subs:
>
>The main objection to having a gasoline engine on a sub is the volatle gas
>fumes.  I was thinking that it might be advantages to use Compressed Natural
>Gas in a regular automotive engine (like a Chevy 350) or whatever would work
>size wise in a psub.  There is a slight power reduction with CNG but not
>much. Also the pressurized tank required would take up a bit more room than
>diesel, but since it is pressurized it would function well at depth as far
>as keeping seawater out.  Another added benifit would be the elimination of
>any possible spills into the ocean environment.  If one went with a CNG
>power it would give you a lot more options with types of engines,
>compression ratios would have to be altered however.  You can find engines
>from the factory designed for CNG otherwise you would need to retro-fit.
>
>Brian
>
>
>
>
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