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:[email protected]] Gesendet: Samstag, 22. Januar 2011 18:27 An: Discussion of biomass cooking stoves; Boll, Martin Dr. Cc: [email protected] 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: [email protected] _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address Stoves mailing list to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://www.bioenergylists.org/ [email protected] http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org
