Dear All,
I totally agree with Tom Reed's comments (below).
Particle size is subjective, and some people call sawdust what I would
call small shavings. If you can see the curl in the cut of the wood,
that material can probably be used in a Fan Assisted (FA) TLUD. I and
others have done that on experimental basis.
I know of nobody focused on "sawdust" in TLUDs. Too much air could
create channels or what Tom R. called "spouted."
At Chip Energy, Paul Wever and I have successfully used some mixtures
of sawdust with other larger-sized fuels, but not successfully with
100% sawdust even when we used compressed air to be sure to be able to
blow through the fuel pile.
To date, the only consistently successful "small particle" fuel in a
TLUD-FA is rice husks. That work is credited to Alexis Belonio in the
Philippines, and much further work by Paul Olivier in Vietnam.
So, I suspect that wood particles as small as rice husks could be
successfully used in a TLUD-FA. But sawdust does not come in such
nicely uniform particles of that size.
Somebody is asking. I hope we hear of their interests and experiences.
I say frequently: We only know about 20% of what is available to be
learned about TLUD pyrolytic gasifier devices. There is so much yet
to do and learn. All are encouraged to join in these efforts.
Paul
--
Paul S. Anderson, PhD
Known to some as: Dr. TLUD Doc Professor
Phone (USA): 309-452-7072 SKYPE: paultlud Email: [email protected]
www.gtz.de/de/dokumente/giz2011-en-micro-gasification.pdf (Best ref.)
Quoting Thomas Reed <[email protected]>:
TM
Depends greatly on the sawdust particle size and moisture content.
With very coarse sawdust should work ok.
With a small fan you may get no penetration. With a larger fan you
are likely to get a spouted of fluidized bed.
Tom Reed
Dr Thomas B Reed
President, The Biomass Energy Foundation
www.Woodgas.com
On Jun 3, 2011, at 8:55 AM, "Tom Miles" <[email protected]> wrote:
TLUD-ites,
Does anyone have experience gasifying sawdust in a fan powered
TLUD? Continuous feed?
Tom Miles
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