[Stoves] ***SPAM*** Re: Adjustable Primary Air (corrected to "Secondary Air")

[Ronal Larson]

Aaron and list:  cc Norm - working also big TLUDs - and is on something like model 20
		and Alex - one of the best early researchers on TLUDs - especially big ones. - a commenter at Aaron’s site)

	1.  Could you supply us a quick sketch ?   
		Presumably the second trash can lid is used for your secondary air control?
			Can you explain that?
			Any way of estimating the ratios of secondary air to primary air as you adjust?
				At what timse in the video do you think the flame is best?
				Of knowing an optimum setting?

	2.   What is the weight of the two bags of pellets?
		Have you weighed the produced char?
		If so more than once  did you record the run times exactly?  Time, input and char weights eeded to calculate power levels.

	3.   The porch heating is accomplished mostly by the large trash can I guess - how much by the two 2-foot stove pipes?
		The dimensions of the can?

	4.  The flames are obviously not below a porch roof -  was this entirely outdoors?   Have you done tests on a porch yet?
		
	5.   Not clear whether you also have primary air control.  Should be easier to do than your secondary air control.

	6.   	What is your mechanism for deciding when to stop the pyrolysis and how do you do that?

	7.   One insert question below

Ron

> On Dec 1, 2021, at 6:26 PM, A J <awingle at hotmail.com> wrote:
> 
> Here is a video I made of a TLUD Natural Draft stove that has adjustable Secondary Air.  This stove is burning wood pellets.  
> 
>       The long wavy flames have as much secondary air turned off as possible.  The tight blue flames are the result of almost maximum secondary air pre-mixed into the wood gas.  During the video I am adjusting the air flow up and down to show the results of different air/fuel ratios.
> 
> I believe these kinds of flames are only possible with very good pre mixing, which until now has been very difficult to control and keep lit.  
> 
> https://youtu.be/yKPfAlPXCMY
> 
> Anyway, I thought someone around here might be interested in these results.  
> 
> Feel free to Email me at awingle at hotmail.com
> 
> Thank you for your time,
> 
> Aaron Wingle

    <snip>

RWL:   Your added message on the next day:

My apologies for stating this was adjustable primary air.   This stove has adjustable Secondary Air.

Adjustable Secondary Air Stove
https://youtu.be/yKPfAlPXCMY <https://youtu.be/yKPfAlPXCMY>

Veronica,

The stove shown in the video is natural draft.  It's a very simple stove made from:
1 ~ large trashcan
1 ~ 4" damper
1 ~ 4" Stove pipe 2' Long
1 ~ 8" stove pipe 2' long
2 ~ Trash can lids 
1 ~ 8" stove pipe end cap

It was built as a porch heater and actually works very well as one.  The stove holds 2 bags of pellets and burns for 5~6 hours and leaves the biochar.  The long tall chimney is unnecessary though some room must be given for pre~ mixing. 

	{RWL:   I don’t see a “long tall” dimension.

Thank you for your very nice comment.

Aaron Wingle


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