[PSUBS-MAILIST] Diesel Exhaust

Hi Marc,
 
before I response in detail, which size should the sub have? And which
range?

And which kind of wave high, wave length and weather you want to survife
on the surface?
Any concept sketch? Do you like to snorckel with the sub? 

Euronaut has more problems with the short medium high wave in the baltic

than with the high but long waves in the north sea.
 
Bad weather in the north sea lift the hole boat before the wave reach
the sail, but in the Baltic the waves are 
shorter and did mot lift the boat so much - as result the sail goes very
wet. Like in the movie "Das Boot"

Short wave in the baltic: 
http://www.euronaut.org/content/gfx/operational/IMG_8705.jpg

Here the over waterline exhaust of Euronaut in operation. 
The funny sound comes from a wave flap close to the end of the exhaust 
which goes up and down at idlle speed. 
http://www.youtube.com/watch?v=PT7i05s92ak

Cooling is also something you should have in mind. 

And noise.. 

And..

vbr Carsten



From: Marc de Piolenc <piolenc at archivale.com>
To: personal_submersibles at psubs.org 
Sent: Thursday, October 10, 2013 10:15 PM
Subject: Re: [PSUBS-MAILIST] Dive report - Pickles Reef


I've been following this discussion with great interest. I
don't have a 
sub yet, but I do live in the Tropics, and as there's no cold
current 
handy to where I live any subbing I do will be in water pretty near air

temperature. As you might expect, I've given this problem a lot of
thought.

My tentative conclusion is that, if I build a sub, I will have to make 
it more autonomous than is the rule on this list. Specifically, it will

need a combustion engine to ferry itself on the surface to dive sites, 
and to maintain comfort and keep the battery topped off for diving while

doing so. I started with the assumption that I would need an air 
conditioning unit running off a small industrial diesel, but then I 
realized that, if I use a snorkel exhausting into the cabin, and have 
the diesel draw air from the cabin, I get continuous renewal of the air

in the cabin without the cost, power burden and safety problems of 
running a Rankine cycle refrigeration system. That's the solution
that 
I've retained for the moment. Of course I also need a secure means
of 
preventing exhaust gas from being aspirated into the snorkel (I
can't 
quite understand how naval submarines manage to combine both functions 
in one mast), but that might be as simple as having the diesel exhaust 
flush with the hull, with some arrangement to prevent water from coming

in. Since the diesel would only be used on the surface, and the snort 
would only be there to allow a low-freeboard hatch to be kept closed, 
the power penalty would be minimal.

Fuel storage, fuel feed and the like still have to be worked out. Naval

submarines have very complex arrangements for this, and that complexity

must be tolerated for a good reason. Even so, I need a simpler way to do

it that still protects the fuel from contamination and me from
asphyxiation.

Marc de Piolenc

-- 

Carsten Standfuß
Dipl.Ing.Schiffbau @ Meerestechnik
Heinrich Reck Str.12A
18211 Admannshagen

0172 8464 420
WWW.Euronaut.org
Carsten at euronaut.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20131011/ddf856c6/attachment.html>