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| flash steam - a long slog to a whizzy boat |
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| HENNEGANOL:
Just a few comments from me. Firstly if you are using parrafin depending on the type of burner fitted, you may need to provide initial preheating of the fuel as is the case with a blowlamp where methylated spirits is used. If you use a pressure jet as is used in domestic boilers preheat is not necessary. Also the igniter probes should be close to the spray, again as in a domestic boiler. Gerald |
| Stefan Pynappels:
Hi Steve, That all sounds very very interesting, I'm really looking forward to see how you get on. WRT Oil Fired central heating burners, they use a geared fuel pump, with the bypass restricted to regulate the output fuel pressure. These can provide up to 18 Bar consistently with fairly little input power. The nozzles used also vaporise the fuel so preheating is not required as Gerald has said, but the pattern the oils sprays out in is also important. some scaling of existing nozzle types may help you, if you need some nozzles to look at and work on, send me a message and I'll stick some in the post to you. Stefan. |
| John Hill:
Regarding the feed pump. I thought someone had invented a venturi to do that job? If I recall correctly it was described as a 'feed water injector', but I cannot recall where. |
| tinkerer:
I have been reading this thread and having no idea what a flash boiler is, I researched it and came up with a very technical description and a laymans description. I am sure you have done the research, but others may not have. here are a couple of links to peruse. http://www.spiraxsarco.com/resources/steam-engineering-tutorials/condensate-recovery/flash-steam.asp http://www.4physics.com/phy_demo/pop-pop_boats/steam_engine/flash-boiler-g.html Another thought is, a marine engine oil cooler has the coils in an outer sleeve of a tube that water flows down the center of the tube to exchange the heat. If you applied the heat to the open center of the tube, it should build steam in the outer coils. I will try to find mine and put up a picture of it. here is a link to a mercruiser oil cooler. http://www.mrcool.us/engine-oil-cooler/mercury-63832a-1.html# |
| sbwhart:
Steve Some interesting pics on flash steam her http://www.model-engineer.co.uk/albums/member_album.asp?a=8135 Looks like there are some guys experimenting/building flash steam boilers Hope this helps Stew |
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