[Stoves] Rapid mixing

[Crispin Pemberton-Pigott]

Dear Alex

 

>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.

 

>From the look of it, it seems there is a lot of preheating from the cone which is formed in a way that reflects heat back through the CO and air. CO responds to IR very well.

 

The CO numbers are low. It looks like the secondary air entrance is the same one that was mounted on your maize pellet gasifier. 

 

Please get a video to us with the higher velocity and we can compare at the same time. That will be interesting. Maybe you can make the velocity variable!

 

Regards

Crispin

 

 

 

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