[Stoves] High Efficiency fans.

[Kyle Thompson]

It is not necessary to "block" the air intake of a fan assembly to reduce the amount of air put into the stove.  This is hard on the fan, puts drag on the motor and probably a few other bad things happen (bad nosie?)

Just simply bleed off the excess air.  This will keep the fan running near its optimized design efficiency.  Both the motor and blade of the fan can be optimized for the use.  

I've talked to an engineer that is involved in the design of high efficiency, light weight, cheap fan/motor assemblys.

If someone (Paul Anderson or Tom) would like to tell me the Maximum amount of air throughput, fan life ect. I should be able to work with this engineer to get some prototypes for testing.

I have talked to this engineer about the stove project and he was very interested in the humanitarian implications.

I have pulled 1.5 volt motors and placed a 12 volt 3.5 inch blade on them from a PC power supply.  I fill the center with glue an drill a hole in it for the motor spindrel.  I guess it would be easier to just place a cork in there instead of glue.  

I'll have to test the assembly for runtime on 1 D battery, but I get enough power from 1 D cell for cooking 2 meals a day for a week, with plenty of power left over.

When you consider the simplicity of the design, there isn't a whole lot that can go bad, and the air output is potentially infinitally variable from 0 to maximum output of the fan.

The woodgas stove puts the fan in the stove, which is fine.  My designs tend to melt the fans when I place them too close to the stove, so I like to keep the fan seperate.  I can easily replace the burn chambers then.  In addition I like to take the fan out and use it to "cheat" to get a campfire really going easy... without kerosene.


 
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