[Stoves] Hensel Paint Can Gasifier Stove

[AJH]

On Sun, 6 May 2007 08:39:47 +0200, Crispin Pemberton-Pigott wrote:

>It will increase the life of your tin can chamber quite a bit.  If you can 
>maintain a spin it will increase it further as it pulls the fire away from 
>the wall and reduces heat losses for free.

Yes if the secondary air holes are angled tangentially and down the
flame is held in a central vortex and the tincanium is cooler, in fact
then you may do away with the heat shield. Mind the air holes will
need to be slightly more sophisticated to form a jet, I'm told a tube
with a length 5 times the diameter is sufficient, I make do with 3
holes. Increase the air pressure and you don't need the primary air.
Also then the char burns nearly concurrently with the pyrolysis
offgas.

Looking at Jim's last photo and it looks like the secondary air is not
providing a big effect as the flame looks diffuse rather than pre
mixed.

Steve Taylor has rendered a 3D drawing of this stove, with a cutaway,
which can be rotated and viewed in recent (I have version 7) Adobe
Acrobat programs. The initial pictures are correctly oriented for me
but it seems to flip upside down when animated but is does usefully
visualise the workings. If Jim is happy to make this public I'll ask
Tom to put it alongside Jim's pdf.

Andrew Heggie