Re: Gasifier fundamental question

[Harmon Seaver <hseaver@cybershamanix.com>]

On Mon, Apr 15, 2002 at 12:34:05PM -0500, Paul S. Anderson wrote:
>       3.b     Tom Reed's turbo stove with blower can kick in the extra air 
> to burn the charcoal after the pyrolysis gasification has ended, and the 
> pot stays in the same place in relation to the fuel.  BUT:
>         The BUT is that the extra air forced onto the charcoal essentially 
> creates a forge (or some other name for a very high temperature forced-air 
> stove).   I tried that with one of my "tincanium" Juntos stoves and 
> promptly melted/vaporized/destroyed the aluminum air pipe in the bottom 
> under the fuel grate through which the primary air was being 

     You don't really need the forced draft to burn up the charcoal, at least
with my experiments it all seemed to burn quite nicely if I gave it a little
more open draft at the end. However, my IDD stove had a much taller upper
section -- "chimney" effect -- which of course increases the natural
draft. Perhaps more experiments are in order with various length top sections --
to get the optimum draft without getting the pot too far away from the pyrolysis
area. Also more insulation in the upper part might make the distance between the
pyrolysis area and the pot less relative. 
    I also had no problems with melting anything, but my coffee can was
insulated with perlite/cement refractory, and it also had a stainless grate. 



-- 
Harmon Seaver	
CyberShamanix
http://www.cybershamanix.com

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