[Stoves] [biochar] Re: The Akha TLUD - Biochar Project in Bangladesh.
Tom Miles
tmiles at trmiles.com
Wed Mar 8 10:40:52 CST 2017
Paul,
Richard Stanley's holey briquettes, or making leaf cakes, serve a
particular need. The concept can be used in other ways. Pulping straw before
densifying it reduces power and wear. (There is science behind that which I
won't detail here.) Pellets are made this way in India and elsewhere. Cubes
or briquettes can also be made this way. This is all mechanical equipment
that needs to be suited to the scale and capabilities. In most cases you
wouldn't consider rebuilding dies every 20 hours but it apparently works in
the right circumstance. A lot more can be, and has been, done on small scale
densification.
Tom
From: biochar at yahoogroups.com [mailto:biochar at yahoogroups.com]
Sent: Wednesday, March 08, 2017 5:29 AM
To: Discussion of biomass cooking stoves <stoves at lists.bioenergylists.org>;
biochar at yahoogroups.com; Mahbubul Islam - Bangladesh with Julien W
<mailccdb at gmail.com>; Julien Winter <winter.julien at gmail.com>
Subject: [biochar] Re: [Stoves] The Akha TLUD - Biochar Project in
Bangladesh.
Michael, Julien and all,
On 3/8/2017 12:09 AM, Michael N Trevor wrote:
"Sounds like they need to follow up on Richard Stanleys briquettes from
biomass Legacy Foundation"
I like Richard's (and others) briquettes and methods, but not for this
Bangaldesh effort.
I disagree about the appropriateness of low density biomass briquettes in
the Akha TLUD. The fuel chamber of the Akha (and many TLUDs that use woody
fuels) is rather small for the low density briquettes, resulting in quite
short operational times for the pyrolysis in those TLUDs.
With fewer than 100 Akha units made and in operation, this would not be a
good time for Mahbubul to start work on TWO new efforts: a larger Akha
stove and making low density briquettes.
About making high density pellets / pucks, that would be ONE new effort, and
that also would divert their efforts from their two objectives, which are
the biochar for agriculture and the current-size of Akha TLUD that is
finding acceptance.
Everyone should note that the Akha TLUD is already blazing new trails on two
issues which are both quite important and will benefit from more usage and
analysis:
1. Significant parts of the Akha are made of "non-metal" materials (whether
clay ceramic or cement mixes or someday something else). Awesome!!
2. The "fixed position" Akha is not easily moved. So the removal of the
char at the end of pyrolysis is via a trap door of metal. Wonderful!!!
Therfore, my recommendation is to bear the extra expense of purchasing the
more expensive wood fuel throughout the whole year. Put the efforts into
the known fuel, such as fuel drying in the rainy season and encouraging the
growing of woody fuel crops, especially bamboo, a known excellent TLUD fuel.
Speaking financially, it should (I expect) be easier to get some donations
from biochar enthusiasts and others for the work with woody fuels than it
would be to get funding for pelletizer equipment (and skilled operators and
energy supply, etc) or for making a new size Akha TLUD or for equipment and
time for having a low density briquette operation that would be focused on
solving a half-year problem (fuel supply for 6 months).
Let me make the above into a suggestion that people might want to consider
some donations to the Akha TLUD stove efforts in Bangladesh. If so, you
should write directly to Dr. Julien Winter winter.julien at gmail.com
<mailto:winter.julien at gmail.com> who is in Canada. (He did NOT ask me
to make this suggestion.)
Note: This current email message will be at the EPosts section of my
website www.drtlud.com <http://www.drtlud.com> where you can also see
the two-page document about the Akha TLUD stove and biochar efforts at:
http://www.drtlud.com/?resource=prt17200
[[[ The EPosts section is for my selection of BOTH biochar and TLUD messages
that are easily accessible for those who do not subscribe to the Stoves or
Biochar listservs. EPosts are sort of my one-way "blog," with no comments
from readers. All comments are to the listservs or to me directly. ]]]
Paul
Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: psanders at ilstu.edu <mailto:psanders at ilstu.edu>
Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com <http://www.drtlud.com>
On 3/8/2017 12:09 AM, Michael N Trevor wrote:
Sounds like they need to follow up on Richard Stanleys briquettes from
biomass Legacy Foundation
On Tue, Mar 7, 2017 at 4:41 PM, Julien Winter <winter.julien at gmail.com
<mailto:winter.julien at gmail.com> > wrote:
Hi all;
Thanks to Ron for some great suggestions a couple of emails back.
It will be worth getting the Biochar User Groups to experiment with making
cakes from wet leaves, and Crispin's suggestion for co-combusting leaves and
wood.
Making leaf cakes would be an improvement for their traditional stoves as
well.
It is great to get suggestions from all over the World. Ideas don't fall
out of the sky as inspirations without a causal history. If new ideas were
so easy to get, humanity would not have spent 100,000 years throwing stones
at hairy elephants. Nobody could say, "I have an idea: a gun. Let's just
shoot the bugger."
Cheers,
Julien.
--
Julien Winter
Cobourg, ON, CANADA
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