[PSUBS-MAILIST] Diesel Psubs

[Marc de Piolenc]

This makes sense. Another one for the archives.

Marc

On 10/13/2013 12:35 AM, MerlinSub at t-online.de wrote:
> Marc exact that..
>
> - Close the door of the engine compartment helps.
>
> - stay a time on the surface before diving helps also -but not so much.
>      On a close enviroment like a submarine the machinery is still hand
> warm on the next day..
>
> - The pressure tight cooling system is exact what I did. But for other
> reasons.
>
>    A normal boats diesel cooling has a internal freshwater cecurit with
> a pump on the engine for the freshwater.
>    than a heat exchanger between the interank freshwater and the
> external seawater and a seawater pump for the external seawater cecurit.
>
>   For saftey reason I go for a single loop. Means only the freshwater
> sytem but running to the outside pipes and pressure tight. Caleld "keel
> cooling system" here. Many fishing vessel here have aht simple
> system. Only one pump, no heat exchanger and no vales to close before
> diving on the cooling system. Of course there are two valves - but just
> for emergency closing if the outside pipe system is damage - very
> unusual by angle bar pipes made of one inch strong steel.
>
>   In general the system can be use to cool the engine block down. But my
> freswater pump is direct driven by the diesel via a  belt and will not
> operate underwater. And I think it is wrong to cool the diesel down that
> way - maybe you need his force short after surfacing.
>
> On a psub size sub it makes sence to run the diesel just as electric
> powergenerator in his own sound box.
> Purchase of the shelf ready with all auxillariy systems. On a bigger sub
> like Euronaut it may mmakes more sences for a direct diesel driven
> propeller gear with a auxillery generator to load the batteries and
> drive the baot underwater.
>
> vbr Carsten
>
> "Marc de Piolenc" <piolenc at archivale.com <mailto:piolenc at archivale.com>>
> schrieb:
>  > My thinking exactly in planning air intake into the cabin, drawn by and
>  > into the engine.
>  >
>  > Good point about residual heat when diving. My only "solution" to this
>  > would be to provide a thermosiphon loop that would continue cooling the
>  > engine's heat exchanger while diving, but that would of course mean that
>  > the whole heat exchanger system would have to be built to withstand full
>  > dive depth. Not very satisfactory. I suppose one could either close off
>  > the engine compartment while diving or just spend some time on the
>  > surface prior to diving to allow the heat to dissipate.
>  >
>  > Marc
>  >
>  > On 10/12/2013 1:56 AM, MerlinSub at t-online.de
> <mailto:MerlinSub at t-online.de> wrote:
>  > > 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.
>  > >
>  > > It also remove the little leaks from the exhaust and the oil dust. And
>  > > works very well on the surface.
>  > > 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.
>  > --
>  > Archivale catalog: http://www.archivale.com/catalog
>  > Polymath weblog: http://www.archivale.com/weblog
>  > Translations (ProZ profile): http://www.proz.com/profile/639380
>  > Translations (BeWords profile): http://www.bewords.com/Marc-dePiolenc
>  > Ducted fans: http://massflow.archivale.com/
>  > _______________________________________________
>  > Personal_Submersibles mailing list
>  > Personal_Submersibles at psubs.org <mailto:Personal_Submersibles at psubs.org>
>  > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>  >
>
>
> --
>
> Carsten Standfuß
> Dipl.Ing.Schiffbau @ Meerestechnik
> Heinrich Reck Str.12A
> 18211 Admannshagen
>
> 0172 8464 420
> WWW.Euronaut.org
> Carsten at euronaut.org
>
>
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>

-- 
Archivale catalog: http://www.archivale.com/catalog
Polymath weblog: http://www.archivale.com/weblog
Translations (ProZ profile): http://www.proz.com/profile/639380
Translations (BeWords profile): http://www.bewords.com/Marc-dePiolenc
Ducted fans: http://massflow.archivale.com/