[Stoves] [Gasification] First run of passive draft (TLUD) gasifier stove successful

Wed Mar 14 10:28:07 CDT 2007

On 3/14/07, Paul S. Anderson <psanders at ilstu.edu> wrote:
>
> Dear Jonathan,
>
> Congratulations on your successful TLUD efforts with natural draft!!!  I
> look
> forward to many discussions with you.
>
> I am cross-posting your message (below) to the Stoves Listserv which is
> where
> most of the discussion is conducted about gasifiers that are COOKSTOVE
> size.
>
> I met Tom Reed in the Spring of 2001 and ever since then I have been
> working on
> these TLUD stoves for both natural draft and forced air.
>
> You mentioned photos, but none arrive with the your message, so please
> send them
> directly to my email address.  I can picture in my mind a 5-gallon
> bucket with 2
> inches of 4 inch-diameter pipe coming out the top.  But you did not
> mention any
> grate or how you prepared your primary air inlet pipe.
>
> My main question is about how your device is creating draft that must
> sustain
> airflows for BOTH primary and secondary air.
>
> About my work with the natural draft TLUDs, here are some references:
>
> At this site there are comments by Tom Miles, but I pasted below the one
> paragraph that he wrote:
>
> http://listserv.repp.org/pipermail/stoves_listserv.repp.org/2005-August/001733.html
>
> Tom Miles wrote in August of 2005:
> When I arrived for a visit to the ETHOS/Aprovecho Stove camp wednesday
> afternoon the Dean of Stoves (Dean Still) was brimming with excitement
> about
> Paul Anderson's new natural draft gasifier stove. Fresh off the plane from
> Bolivia, Paul had built a natural draft gasifier stove that swept the
> competition in tests for water boiling, gaseous and particulate emissions.
> During the camp several stoves were subjected to tests with three
> parallell
> testing devices: the CEIHD (UC Berkeley) particle detector, Tami's (Uof
> Illinois at Urbana-Champaign) portable stove tester, and other gas
> analysers. Tami, Chris and David will provide the results and details.
> When
> I left that evening the mad scientists, David from CEIHD and Chris from U
> of
> Illinois, were still crunching the data but the place was buzzing with
> good
> words about the performance of the gasifier-without-a-fan. Congratulations
> Paul for coming so far since you first showed us your ideas at ETHOS 2003
> (January).
> ************************
>
> That natural draft TLUD won the Cat Pee Award for clean combustion, and
> the data
> are shown in the graphs as "TLUD" and "Paul's TLUD".  I subsequently
> named that
> style of stove as the "Champion Stove".  Some photos of the stove are at:
> http://www.bioenergylists.org/stovesdoc/ethos/2005camp/camps2005.htm
> especially see photos 28 - 32 plus views in some other photos.
>
> A presentation about TLUD advances was made at ETHOS 2006.  See
>
> http://bioenergylists.org/stovesdoc/ETHOS2006/Anderson/AndersonETHOS2006.pdf
>      specifically Slides 6 - 11 that give some dimensions.
>
> And most recently, Dr. Dale Andreatta presented these results at ETHOS
> 2007.
> A Report on Some Experiments with a Natural Draft Top-Lit Up Draft
> (TLUD) Stove
>
>
> http://www.vrac.iastate.edu/ethos/files/ethos2007/Sat_AM/Session_2/Andreatta%20TLUD%20presentation.ppt
>      It includes some photos plus data that show even cleaner emissions
> than
> what had been previously obtained.
>
> *************
> Jonathan, it is truly wonderful to have another person be serious about
> the TLUD
> technology.
>
> You mentioned the humanitarian objectives of the work on cookstoves.  Your
> enthusiasm and business background are certainly needed to help
> accomplish this
> effort.  I look forward to working with you on such efforts.
>
> Please note that from Friday noon, I will be on an 18 day trip to India to
> the
> PCIA meeting (Partnership for Clean Indoor Air).  My replies might be slow
> after Friday, and I do not want to loose and messages, but please
> resend if you
> do not get a reply in a reasonable time.
>
> Please tell us all about your next experiments!!!
>
> 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 "Jonathan F. Pratt" <jonpratt76 at hotmail.com>:
>
> > I decided to share this with the list...
> >
> > Just this evening I finally got around to building myself a passive
> > draft woodgas stove.  I followed the same basic design as the other
> > woodgas stoves.  Tom Reed has said he has had difficulty with natural
> > draft prototypes.  He could never get any that were very clean
> > burning.
> >
> > The results on the first run for mine were extremely encouraging.
> > However, I used dry store bought woodchips.  But I got an extremely
> > clean burn and did not even smell smoke just a few feet from the unit.
> >
> > I kept thinking in my head how to get mass produced units for
> > humanitarian aid that can be shipped somewhat compactly in bulk.
> > This unit has no fan and no batteries to deal with.
> >
> > I built mine out of a 5 gal steel pail, and about a 2' section of
> > stove pipe.  The steel pails are stackable and can be shipped
> > compactly.  The stove pipe sections (from Home depot) can of course
> > be shipped stacked in bulk and easily put together into cyliners by
> > hand.  The only difficult part was cutting a hole out of the lid to
> > slip the stove pipe section into.  I'm sure some kind of hole punch
> > die can be made pretty easily to do this task much easier than I did
> > it with a jigsaw with metal cutting blade.  I used the circular disc
> > from cutting a hole in the lid as the bottom of the combustion
> > chamber, drilling a few holes into it and the bottom of the stove
> > pipe and using some steel wire to hold it onto the bottom of the pipe.
> >
> > I drilled all the air holes with a 1/4" bit.  All in all the
> > dimensions of this unit were very similar to the Phillips stove but
> > without the thermocouple powered fan and the fire tube is longer
> > extending down to only 2" from the bottom of the 5 gal pail.  I
> > painted both the combustion chamber and the inside of the steel pail
> > in black stove paint for durability.  The stove pipe (combustion
> > chamber extended above the lid about 2") I drilled airholes in the
> > pipe just below the lid.  The pipe itself extending beyond the lid
> > can be made to directly support a pot with a few extra brackets for
> > support and/or more holes drilled in the section that sticks out the
> > top of the lid for the flame to exit.
> >
> > I got a decent amount of draft from the unit as you can see in the
> > attached pictures.  It was very interesting to see a layer of
> > swirling smoke UNDER the flames.  Because of the smoke I couldn't
> > even see the woodchips underneith.  But as I said the flames consumed
> > all of the smoke and only very seldom would I see a small puff of
> > smoke escape the combustion chamber. Maybe I have had good luck with
> > this one because of the stove paint.
> >
> >
> > Best Wishes,
> >
> > Jonathan Pratt
> > President, iENERGY Inc.
> > www.woodgas-stove.com
> >
> >
> >
>
>
>
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