[Stoves] Terminology TLUD - PeFiBe-burning-mode

[Boll, Martin Dr.]

Dear Paul and stovers

1.) By mentioning a three-stone-fire in combination with a rocket stove as
Andrew did, I wanted to show how interesting and fantasy-stimulating such a
point of view is. I did not intend to span the bow from a three-stone-fire
to top-lit burning. -Naturally there are very different three-stone-fires.

2.) For the bow from a simple open fire (not three-stone!) to TLUD:
It is right there is no air admission from bottom by a fire made on the
ground. But there is (at least for a short time) out-gassing from a log put
under the glowing charcoal. 
Certainly the chemical composition of the gas is a lot different from a
TLUD(By missing air from bottom) but the burning conditions for the gas
above the charcoal are very similar.
For me this seems very essential. And it seems fascinating to compare all
sorts of stoves which out-gas their fuel through a layer of glow.

This was the reason I proposed to classify stoves, into a burning-mode. 
I wanted to classify them _not_ as TLUDs, but stoves burning in a
PeFiBe-burning-mode. 
-Please stovers propose better expressions, or tell why this aspect is or is
not worth to classify stoves or a burning mode.



Kind regards
Martin



-----Ursprüngliche Nachricht-----
Von: Paul S. Anderson [mailto:psanders at ilstu.edu] 
Gesendet: Samstag, 22. Januar 2011 18:27
An: Discussion of biomass cooking stoves; Boll, Martin Dr.
Cc: stoves at lists.bioenergylists.org
Betreff: Re: [Stoves] Terminology TLUD - PeFiBe-burning-mode

Dear Martin and all,

Regardless of any naming, you have expressed (I believe) the issue of  
the fire ( and air) coming up through the bed of the fire.  Such a  
fire can exist if there is a grate under the bed of embers and fuel.   
But if the fire is on the ground, it seems like the access to the air  
(the necessary oxygen) is conical (point is upward) and on the outside.

Whatever is in the center at the bottom is actually shielded from  
access to the air if the fuel pile is sufficiently large or  
sufficiently "closed" (meaning, no large log present to allow a  
channel of air to get down and into the center of the fire.).

We all talk of the 3-stone fire as if it was one type only.  But the  
placement of the fuel wood and sizes could greatly impact the  
important issues of cook-fires (duration, emissions, etc.).  This  
might have been studied in the past.  It is not on my list of topics  
for research.  Maybe someone else will follow up.

-- 
Paul S. Anderson, PhD
Known to some as:  Dr. TLUD    Doc    Professor
Phone (USA): 309-452-7072   SKYPE: paultlud   Email: psanders at ilstu.edu