[Stoves] flames touching pot

[rongretlarson at comcast.net]

Alex: 



   Your video showed a flame that I thought might be on the verge of going out.  



    Can you give a turn-down ratio?  



   Are you quite happy with this "double chimney" (which seems to add a lot of height)? 


  What is the CO ratio in this video - and how good have you achieved? 



Ron 




----- 元のメッセージ -----


差出人: "Alex English" <english at kingston.net> 
To: "Discussion of biomass cooking stoves" <stoves at lists.bioenergylists.org> 
送信済み: 2011年9月14日, 水曜日 午前 11:59:40 
件名: Re: [Stoves] flames touching pot 




>> The question is why the yellow flame produces soot , but not the blue 
>> one ? 

> The difficulty with achieving the same with wood gas is that the woodgas 
> is inherently hot as it meets the air. It would be interesting to cool 
> the gas from a tlud ( which would mean losing the fuel value of all the 
> tars present as they would condense) and then using a premixed burner on 
> the remaining cooled gases. 

We've been here before.... 

The blue ones tend to be well oxygenated (mixed)or even too high in 
"excess air" from an efficiency point of view. I expect there are some 
additional interesting  details for ag residues when it comes to 
chemical species and flame colour. 

I have been able to get an all blue flame with wood pellets in a TLUD 
using my double chimney set up. It focuses the pryolysis gasses into a 2 
inch diameter chimney and then adds "secondary" air (probably at least 
100% excess) to premix just before it widens to 4-6 inches and burns, 
blue. They haven't been the lowest CO/CO2 flames I've tested. 

  Hard to get a good picture, except at night. 

http://www.youtube.com/watch?v=rvAwTnezVc8 

Alex English 

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