Crispin and all, (Christa might want to use these diagrams in the
revision of the Micro-Gasification Manual)
Thanks for linking us to the report from Georgia Institute of
Technology. Dated April 2011. So most of those students are probably
graduated by now. I think Marc Pare might have known those students
and Professor Colton.
I really like the graphics that show the differences in the devices for
producing biochar. See pages 6, 9, 10, and especially pages 51 and 52
(pages of the digital document, not the numbers printed on the sheets in
the report). The "Story Board" is very well done for understanding
what is happening in each of the 3 variations shown!!!
Some notes:
1. Page 51 story board shows the method that Peter Hurst used in his
video. The story board well illustrates why this method does NOT work
very well. That is: TLUD heat starts at the top, which is not the
right place when you are trying to heat a retort.
2. Page 52 shows the John Rogers design of a TLUD in a barrel.
3. The students eventually did a retort with a fire at the bottom see
page 10.
4. Analysis: The students watched two YouTube videos, one by Peter
Hurst and one by John Rogers. Fine. But there is no indication in
the report or in the References of any examination of what preceded and
influenced the work of Hurst and Rogers. Result was that they appear to
have missed some crucial components. Specifically there seems to be no
use of the "concentrator disk" in the TLUD experimental unit, a crucial
component devised separately by Wendelbo and Anderson. The Rogers unit
functions but is not optimal.
5. Now that the report is getting some wider circulation, I hope that
those who read it will not take it as gospel. Users and experimenters
should search the literature about the smaller TLUDs and about biochar
barrels etc. that several of us have presented in earlier years and have
been presenting recently at conferences such as ETHOS-2012 in
Kirkland/Seattle and the USBI-2012 in Sonoma.
Anderson ETHOS-2012 presentation: Barrel-size Micro-gasification for
Combined Heat and Biochar (CHAB) in "Mini" Industries
can be found at:
http://www.vrac.iastate.edu/ethos/files/ethos2012/SunAM/Anderson_Microgasification%20for%20combined%20heat%20and%20biochar%20in%20Mini%20Industries.pdf
A video of my USBI presentation is available at:
http://2012.biochar.us.com/profile/80/paul-s-anderson
Personally, I like the bottomless-biochar-barrel for many situations and
for its ease of construction. One was prepared and used twice at the
recent First Biochar Summer School, in Potsdam, Germany.
A LOT OF WORK STILL NEEDS TO BE DONE ABOUT BARREL-SIZE TLUDS AND BIOCHAR
PRODUCTION.
Paul
Paul S. Anderson, PhD aka "Dr TLUD"
Email: [email protected] Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com
On 9/29/2012 6:03 PM, Crispin Pemberton-Pigott wrote:
Dear Friends
*ACREST MOBILE CHARCOAL KILN*
http://www-old.me.gatech.edu/jonathan.colton/detm/kilnfinalreport.pdf
Regards
Crispin
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