[Stoves] improving charcoal stoves

[Peter Verhaart]

Figures! Great.
I suppose your figure for the concentration of CO from a charcoal stove 
is in the effluent?
Poison wise it is a large figure but from a combustor's point of view 
0.1 % of CO in otherwise inert gas is difficult to burn.
So we should prevent its formation at the source. Enough air wherever 
char burns.
Perhaps some top down  burning arrangement, air blown on top of a 
charcoal bed.
So we have a similar problem. Wood produces volatiles where there is no 
air to burn them, charcoal produces CO under similar conditions.
Keep up the good work, Dean, Damon, David!
With kind regards.

Peter Verhaart



Dean Still wrote:
> Dear Peter,
>
> To "cook" 5 liters of water (bring to boil, then simmer for 45 minutes) the
> open fire in our tests made 55 grams of CO. The two charcoal stoves made 112
> and 135 grams to do the same task. A Rocket made 15. Stoves with forced air
> made 7 to 9 grams. Propane made 0.5.
>
> When testing charcoal we see over 1,000 ppm. Dangerous!
>
> Charcoal is like propane in that it requires little tending. Wish we could
> reduce the CO. I'm going to test Lanny's stove tomorrow and see what
> happens.
>
> All Best,
>
> Dean