[Stoves] iCan Trash Can Style - very clean burning

[Crispin Pemberton-Pigott]

Dear Jock

 

There is another item that should be on your list in order to get the
desired result:

 

My hope for the combustion chamber concept  is that it will:

 

1. Increase residence time;

2. Increase turbulence/mixing;

3. Yield a hotter gas;

4.  Optimise the excess air level

 

All of this will be helpful in minimizing creosote and soot.  A hot enough
combustion chamber will 'crack' and burn the tars that would otherwise form
creosote.

 

It is true that 'hot enough' is achieved by limiting the chilling effect of
unnecessary air. The purpose of mixing it to be able to reduce that air
requirement. The residence time is for the same reason. The hotter gas is
the result - it has as little as possible useless nitrogen in it, drawn in
with the needed oxygen.

 

Because of the critical important of this EA factor, and because it has to
be measured at the point where the gases exit the burner (usually at the
edge of the pot) one has to use a device which keeps out ambient air. It is
why it is not possible to develop a stove under a hood, because you cannot
tell with a hood what the EA level is, and it is critical to the combustor
development process.

 

For many TLUD's the issue is not excessive amounts of air, it is from too
little, applied to the combustion too late in the gas column. This causes
characteristic effects: flames emerging around the whole pot and a lot of
smoke. TLUD's are not magically clean-burning, but they can be in the right
conditions.

 

Regards

Crispin

 

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