[Stoves] partial fan compensation by static-mixers?

[Paul S. Anderson]

Dear Martin and all,

I like the term "static mixers".  I believe that would be the placement of
"barriers" into the stream of gases/flames.  If more than that, please 
explain.

The stove camp focus on fans/forced air is for both or either primary or
secondary air, not just for the mixing issues.

Last year at stove camp, the focus was on natural draft.  The winner of 
the "Cat
Pee" award for clean combustion was my T-LUD stove that I subsequently 
named the
"Champion" stove.  In that unit, there is a 6-inch diameter 15-inch vertical
chamber for combustion of the generated gases that enter from below through a
3-inch diameter central hole in the "concentrator disk" (could probably be
called a throat).  As the flames rise in the combustion chamber, there should
be plenty of space for some static mixers (barrier types).  I could 
easily hang
them from the upper lip of the combustion chamber (or set them on top of the
concentrator disk).  I have thought of this several times, but have not yet
done anything serious about the topic.

So I express my interest and ask for suggestions.

Related to this, I desire some form(s) of "flame holder" that will assist in
maintaining ignition of the gases in the advent of some disruption of the gas
flow or flame.

I leave to Stove Camp on Saturday AM, so I hope suggestions arrive in time for
me to fabricate some to take with me and have tested in the Aprovecho testing
facilities.

Suggestions should be as specific as possible but also tell me of the 
amount of
size changes that could be allowed.  I will be using materials from my 
stock of
tincanium supplies plus hardware stove materials.  Please discuss the vertical
placement aspects as well:  How high above the concentrator disk?  Should
different heights be tested?

I will see what I can do.

Paul

-- 
Paul S. Anderson, Ph.D., Geography professor - Emeritus
Telephone:  USA-309-452-7072 (residence and office)
Internet site:  www.ilstu.edu/~psanders
For my gasifier stoves info, go to:
http://bioenergylists.org/contributors#Paul_Anderson


Quoting "Boll, Martin Dr." <boll.bn at t-online.de>:

> Tom, Andrew, Dean
>
>
>
> and to all now discussing the possible advantage of the Swosthee-stove.
>
>
>
> Subject of the Aprovechio-meeting will be fan-use in stoves. I think, there
> is a lot of interest to get some "natural-draft-surrogate" to replace or
> partly replace electrically fans.
>
> As I nudged the interest for the Swosthee-stove (Vortex helping for
> gas-mixing/better-draft),
>
>
>
> I want to re-introduce the idea for using static-mixers. (Now not in
> stove-pipes for equal heat dispersion within the cross section, to get
> better radiant heat use at the tube-wall, my first proposal, but:)
>
>
>
> There are ceramic static-mixers, which I guess, could be suited to be used
> in burning-chambers of stoves. Does it sheet-metal do as well?
>
> Using static mixers, good gas-mixture would be possible with less draft,
> possibly with natural draft, (when not enough draft: additional augmented by
> other "tricks"?).
>
>
>
> As Kevin Chrisholm answered to my proposal to use static-mixers, some months
> ago, he was enjoyed, that static-mixers could catch tar in pipes (-his
> idea-)
>
> And his meaning was: static mixers could be constructed relatively simple.
>
> There was no further discussion in the stoves-list, neither about the
> geometry of static-mixers nor about the construction/fabrication.
>
>
>
> Possibly it would be interesting to have some static-mixers by hand, to
> "hang" them into any stove burning-chamber (-let them warm up-) and have a
> look, if the effect they make, is interesting and promising to make
> seriously experiments.
>
> Even the effect of slowing down the draft must be considered which is
> sometimes desired but mostly not wanted.
>
> Would that be an effect, less important than better mixing of the burning
> gasses?
>
>
>
>
>
> Can we possibly reach a "comfortable stirring" the burning gasses?
>
> -Though we know, an electrical fan is most comfortable -
>
>
>
> Martin
>
>
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>
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>



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