[Stoves] Rapid mixing

[alex english]

Crispin,
I don't know about the chemistry in the reaction zone, except that I would
expect more hydrocarbon "tars" to remain with the char at lower
temperatures.

I am not currently tooled for combustion gas analysis. When I was, this
flame would test at <100ppm CO and 8~10% CO2.

Secondary air was not preheated beyond incidental ambient heat from the
stove. it would be easy to get significant controllable preheat off the hot
edge of the funnel.

Alex

On Sep 29, 2016 1:01 PM, "Crispin Pemberton-Pigott" <
crispinpigott at outlook.com> wrote:

Thanks alex



If you run a higher superficial velocity I would expect to see the flame
turn more to the blue, but it is already blue. Is it possible the H and all
what we would normally see in the ‘flaming pyrolysis’ is taking place
inside the bed? That would be pretty hot, no so?



Very interesting. Great video. What’s the CO/CO2 ratio in that condition?



When the premixed air is added, what is the temperature going in? Harold
thinks we should investigate that. I agree. I’ll ask Riaz at CAU.



Crispin







No, but it is produced with a pyrolysis front at a temperature (500c ish)
at the low end of normal for a TLUDs filled with wood pellets. There are
some unanswered ( or demonstrated) questions here. To match burn rate with
a higher py-fr-tp I need to use a smaller fuel chamber and increase the
superficial velocity. This will perhaps produce a different gas
composition. We'll see...

Alex



On Sep 29, 2016 9:00 AM, "Crispin Pemberton-Pigott" <
crispinpigott at outlook.com> wrote:

Dear Alex



is that flame produced late in the pyrolysis? ‎By that I means in a carbon
'evaporating' stage.



Thanks

Crispin


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