A.D., and all
On the issue of using stick-wood in TLUD stoves, please give us more
information or perhaps a video specific about stick-wood. How tightly
do you place it?
And please tell us the numbers of units per month or year or total
(whatever data you have will be useful.).
Note about TLUDs: Once the fire has reached the bottom (at the end of
pyrolysis or if the fire drops down too quickly throught excessively
large gaps), the device is no longer operating in the "TLUD mode" that
has the actively decending pyrolysis front. It is then a
bottom-burning fire, akin to a bucket fire that is ignited at the
bottom. The "mode" changes inside of the same stove. And the
emission levels change, etc.
Therefore, the ability to add additional fuel while the stove is
burning does not automatically mean that it is operating in the TLUD
mode. What is happening to the newly input wood is that it is being
pyrolyzed by the heat that is coming upward. That can be a form of
micro-gasification (pyrolysis from heat without oxygen present -- as
in a retort -- without the arrival of the small amount of oxygen as
occurs in the TLUD-specific migrating pyrolysis front). Therefore, it
is not the same as the physical-chemical processes in the downward
migrating pyrolysis front.
TLUD refers to a process of ""top-lit updraft with migrating pyrolysis
front", and when that front stops moving at the end of the batch
process, the mode or regime of the fire changes.
Eight years ago (2004 LAMNET paper) when I first used the term
"top-lit updraft" I did not sufficiently understand this important
aspect of gasification processes.
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 (excellent ref.)
My website specific for TLUD information: www.drtlud.com = www.DrTLUD.com
Quoting Anand Karve <[email protected]>:
Our Sampada gasifier stove accepts 8 inch (20 cm) long pieces of wood, as
well as coconut shells, date seeds, walnut shells, and any other woody
material. It is a T-Lud type of stove, without any fan or any other moving
part. It is sufficiently short for a woman to sit on the ground in front of
the stove while she is cooking. Fresh material can be fed into the stove
while it is burning. It is mass produced. It is quite popular locally, but
we have also exported a few pieces to other countries.
Yours
A.D.Karve, Director,
Samuchit Enviro-Tech P.Ltd.
Pune, India
On Mon, Apr 2, 2012 at 1:45 AM, <[email protected]> wrote:
All,
Muhammad Nurhuda has provided links to an interesting series of TLUD
cooking
stoves made by Kompor Biomass in Indonesia. The videos show how large
pieces can be burned in TLUD designs.
Tom Miles
-------------------------------------------------------------------
Let me first introduce myself. My name is Muhammad Nurhuda, I am
researcher and teaching staff at Physics Department, Brawijaya University,
Malang, Indonesia.
We have developed various biomass stoves. The fuels also vary from chopped
woods/twigs, pellet, palm kernel shell, hazelnut kernel shell, corncob,
etc..
You might see the videos of our stoves in the following youtube's
addresses:
http://www.youtube.com/watch?v=sty_pdFYr44
http://www.youtube.com/watch?v=B4r5U18s_OY
http://www.youtube.com/watch?v=g7TZn6YGOcI
http://www.youtube.com/watch?v=KOba6FobfrQ
http://www.youtube.com/watch?v=b70z9-0nK6E
All stoves presented above are of TLDU types, but the combustion is
improved by using pre-heating and counter-flow burning mechanism. The one
intended for palm kernel shell utilizes diffused-combustion mechanism, in
addition to pre-heating and counter flow mechanism.
The latest one
http://www.youtube.com/watch?v=b70z9-0nK6E
is devoted for institutional cook stove or small restaurants.
Very recently, we have also developed a new rocket stove. The combustion
in this new rocket stove is improved by introducing counter-flow burning
mechanism. Please check the video in the following address:
http://www.youtube.com/watch?v=kID0YL6TyqA
I have been invited by Prof Anderson to join this discussion group, a year
ago. Due to my bad English, I am not very confident to write an article in
discussion group. However, I always check if there is a new one.
With best regards
M. Nurhuda
Malang, Indonesia
[email protected]
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***
Dr. A.D. Karve
Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
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