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size=2>Breathing air for the diesel engine from
inside the cabin is very common to clean the cabin air.
Air goes
in the cabin via the open hatch. <BR><BR></font>It also remove the
little leaks
from the exhaust and the oil dust. And works very well on the
surface. <BR>In Euronaut the diesel air inlet is from the
battery
bilge compartment to vent also the battery gases during charing them on
the
surface run. <BR><BR>The problem in real is more : If you stop the
diesel for
diving and close the hatch to dive and run electric. <BR><BR>The inside
goes
pretty hot and dusty because you have some big block of hot metal
(engine,
gear , compressor etc) <BR>in you engine chamber.. Nice here
in
norther europe during the winter period.. <BR>Will not imagine what
it
means in the caribiean during summer.
<BR><BR> vbr Carsten
DSO <FONT size=1>(- Diesel Submarine Operator- )</FONT><BR>
<BR>"hank pronk" <hanker_20032000@yahoo.ca> schrieb:
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><div style="RIGHT: auto"><SPAN style="RIGHT: auto">Marc,</SPAN></div>
<div style="FONT-SIZE: 16px; RIGHT: auto; COLOR: rgb(0,0,0); FONT-STYLE:
normal; FONT-FAMILY: tahoma, new york, times, serif; BACKGROUND-COLOR:
transparent"><SPAN style="RIGHT: auto">I would think you will need an ac
unit on your engine because the engine will generate some heat even with
a water cooled manifold. If you run the exhaust stack inside the
air stack it will pre heat the air coming into the engine. Pre
heated air is good in northern latitudes but bad in the tropics.
The heated air will kill your fuel efficiency. I also would not
suck the combustion air through the hull, the exhaust will find its way
in. I would do a short air stack and a tall folding exhaust
stack. <VAR id=yui-ie-cursor></VAR> A diesel engine in a
psub is a great idea.</SPAN></div>
<div style="RIGHT: auto"><SPAN style="RIGHT: auto">Hank</SPAN></div>
<div style="RIGHT: auto"><SPAN style="RIGHT: auto"></SPAN> </div>
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readonly="true"></DIV><FONT size=2 face=Arial><B><SPAN
style="FONT-WEIGHT: bold">From:</SPAN></B> Marc de Piolenc
<piolenc@archivale.com><BR><B><SPAN style="FONT-WEIGHT:
bold">To:</SPAN></B> personal_submersibles@psubs.org <BR><B><SPAN
style="FONT-WEIGHT: bold">Sent:</SPAN></B> Thursday, October 10, 2013
8:15:44 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re:
[PSUBS-MAILIST] Dive report - Pickles Reef<BR></FONT></DIV>
<DIV class=y_msg_container><BR>I've been following this discussion with
great interest. I don't have a <BR clear=none>sub yet, but I do live in
the Tropics, and as there's no cold current <BR clear=none>handy to
where I live any subbing I do will be in water pretty near air <BR
clear=none>temperature. As you might expect, I've given this problem a
lot of thought.<BR clear=none><BR clear=none>My tentative conclusion is
that, if I build a sub, I will have to make <BR clear=none>it more
autonomous than is the rule on this list. Specifically, it will <BR
clear=none>need a combustion engine to ferry itself on the surface to
dive sites, <BR clear=none>and to maintain comfort and keep the battery
topped off for diving while <BR clear=none>doing so. I started with the
assumption that I would need an air <BR clear=none>conditioning unit
running off a small industrial diesel, but then I <BR
clear=none>realized that, if I use a snorkel exhausting into the cabin,
and have <BR clear=none>the diesel draw air from the cabin, I get
continuous renewal of the air <BR clear=none>in the cabin without the
cost, power burden and safety problems of <BR clear=none>running a
Rankine cycle refrigeration system. That's the solution that <BR
clear=none>I've retained for the moment. Of course I also need a secure
means of <BR clear=none>preventing exhaust gas from being aspirated into
the snorkel (I can't <BR clear=none>quite understand how naval
submarines manage to combine both functions <BR clear=none>in one mast),
but that might be as simple as having the diesel exhaust <BR
clear=none>flush with the hull, with some arrangement to prevent water
from coming <BR clear=none>in. Since the diesel would only be used on
the surface, and the snort <BR clear=none>would only be there to allow a
low-freeboard hatch to be kept closed, <BR clear=none>the power penalty
would be minimal.<BR clear=none><BR clear=none>Fuel storage, fuel feed
and the like still have to be worked out. Naval <BR
clear=none>submarines have very complex arrangements for this, and that
complexity <BR clear=none>must be tolerated for a good reason. Even so,
I need a simpler way to do <BR clear=none>it that still protects the
fuel from contamination and me from asphyxiation.<BR clear=none><BR
clear=none>Marc de Piolenc<BR clear=none><BR clear=none>On 10/11/2013
1:45 AM, Land N Sea wrote:<BR clear=none>> I have been out of the
loop for 5 weeks on the mainland on my sailboat<BR clear=none>> and I
should of read all the emails before responding when I got back. I<BR
clear=none>> did view the great footage and noticed that my tower
looked a little<BR clear=none>> taller (good for water ingress) and
of course doesnt have the dome so I<BR clear=none>> hopefully wont
have quite as bad of a heat problem as one with the dome<BR
clear=none>> but I was thinking about Emiles clear acrylic fairing
as
an option when<BR clear=none>> I heard about the water egress
problems with a three foot chop.<BR clear=none>> It does get pretty
hot here and we are about the same latitude as<BR clear=none>>
Florida so I will probably be trying Phils idea of the frozen
pouches<BR clear=none>> vest and or the gallon of frozen water and
have the air coming out of my<BR clear=none>> scrubber blowing
against it.<BR clear=none>-- <BR clear=none>Archivale catalog: <A
href="http://www.archivale.com/catalog" shape=rect
target=_blank>http://www.archivale.com/catalog</A><BR
clear=none>Polymath weblog: <A href="http://www.archivale.com/weblog"
shape=rect target=_blank>http://www.archivale.com/weblog</A><BR
clear=none>Translations (ProZ profile): <A
href="http://www.proz.com/profile/639380" shape=rect
target=_blank>http://www.proz.com/profile/639380</A><BR
clear=none>Translations (BeWords profile): <A
href="http://www.bewords.com/Marc-dePiolenc" shape=rect
target=_blank>http://www.bewords.com/Marc-dePiolenc</A><BR
clear=none>Ducted fans: <A href="http://massflow.archivale.com/"
shape=rect target=_blank>http://massflow.archivale.com/</A>
<DIV id=yqtfd21842 class=yqt5330809609><BR
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</blockquote>
<font face="Courier New" size=2> </font><font face="Courier New"
size=2><br><br>-- <br><BR>Carsten Standfuß<BR>Dipl.Ing.Schiffbau @
Meerestechnik<BR>Heinrich Reck Str.12A<BR>18211 Admannshagen<BR><BR>0172
8464 420<BR>WWW.Euronaut.org<BR>Carsten@euronaut.org</font></body>
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