Heat in engine room in model boat..

[Jens Eirik Skogstad 1Participant @jenseirikskogstad1]

[Jens Eirik Skogstad 1Participant @jenseirikskogstad1]

Hi folks! I has completed the twin double acting steam engine with homebuilded water-tube pot boiler, 76 mm diameter x 119 mm long with 5 water tube 3/16″, plate thickness 1 mm copper, the ends of boiler are reinforced with extra perforated plate brazed inside on endplate, also without stays. The furnace has double wall to better insulation agains hot of pressurized alcohol blow lamp (Saito blow lamp). The chimney has a exhaust steam pipe to blow out of chimney to improve air intake into the furnace and keep less hot out of furnace in engine room. I has test run the steam engine and boiler with good results.

 

But how hot can it be in the engine room in the model boat? I has testet temperature under furnace, there are not hot by blow lamp since the furnace are double walled. I am planning to have open door/windows to keep engine room less hot.

 

It is a norwegian coastal boat (Noggsund from “Model Boats” issue) the steam engine are installed. The boat are 95 cm long.

 

Edited By Jens Eirik Skogstad on 19/05/2010 21:03:23

[CirclipParticipant @circlip]

You could also run a “Pressurised system Jens Eirik, A 5v or 12v CPU (Computer) fan to suck IN cool air and let it vent through the doors/windows/vents. If you try to use it to extract, it would probably melt the fan or dry the bearings in it out.

 

  Regards  Ian.

[Ian S CParticipant @iansc]

If you have enough surplus power, you could use a small DC electric motor as a generator driven off the steam engine to drive the system suggested by Ian, saves batteries.Ian S C

[Jens Eirik Skogstad 1Participant @jenseirikskogstad1]

Thanks for the tips about the fan in the inclosed engine room..

 

Are there some recommented to insulate the engine room agains heat of boiler/burner? Sheet of asbest are not longer available cause health injury. Are the other alternative material who can replace the asbest?

 

 

[CirclipParticipant @circlip]

Ceramic paper, about 3mm thick, cuts with a knife, or even scissors.

 

   Regards  Ian.

[tanveer amitParticipant @tanveeramit41419]

edited post – word document – no content included.

 

Edited By David Clark 1 on 21/08/2010 08:54:51

[SteamshyParticipant @steamshy]

I saw an earlier posted photograph where someone had used silver foil with the reflective side facing the boiler glued to the side walls of his launch. I guess it may help any heat reaching the walls

Andy

[Ady1Participant @ady1]

From my doodling around with solar stuff I stumbled across the fact that the best colour for emitting heat is black.

Radiators around the house should in fact be painted with black, not white paint to maximise heat emmission.

…can't see the missus agreeing though…

 

I would read up on modern heat insulation stuff jens, there's bound to be something which meets your needs.

Also the home furnace metal casting internet community will have quite a few tech heads who will know what you should look for.

 

Here's a chap who's trying to use his microwave as a furnace for silver and Gold

He's got up to about 1000 degrees Centigrade in his home microwave so far

…instant superheated steam pot noodle has become a reality…just watch your fingers

 

He finds that ceramic fibre wool protects the walls of his microwave oven

That might be what you are looking for.

 

gl

 

Edited By Ady1 on 22/03/2012 01:13:53

[Sub MandrelParticipant @submandrel]

Don't worry Ady, radiators give out most of their heat by convection (warming up air around them) not radiation – think about it, if a double rad was only using radiation only a quarter of it woudl be effective, a quarter would heat the wall and the middle bits would do nothing. That's what they have fins on them as well. You can improve radiators by purring foil behind them and by putting a shelf above it to deflect the rising airstream away from the walls and into the room.

If you paint a rad black, it will dump too much heat (although my wife would approve of that!)

Neil

[Author]

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