GAS-L: 3rd World "Chipper" Device

[Peter Singfield <snkm@btl.net>]

Dear All;

>I am especially interested in the least 
>expensive, and I hope manually powered, but all info will be useful.

Regarding your quest for that perfect "chipper".

May I dare suggest the Machete??

Peter Singfield
Belize -- Central America


At 01:06 PM 6/17/2002 -0500, Paul S. Anderson wrote:
>Dear Graeme and other "Gasifiers", (with copy to the Stoves list serve)
>
>I am new to this list serve, but have been active for a year on the Stoves 
>List serve.  I am working with Tom Reed on a domestic gasifier stove for 
>cooking with biomass.  My area of work is southern Africa, specifically in 
>Mozambique and where it joins with Swaziland and South Africa.  I head to 
>Africa on 4 July for 3 months.
>
>My question is about "chippers".  Graeme makes clear statements about drum 
>chippers producing poor quality chips and screw-auger chippers producing 
>good quality chips.
>
>Is there a good source of info about these chippers, especially regarding 
>making fuel for gasifiers?  I am especially interested in the least 
>expensive, and I hope manually powered, but all info will be useful.
>
>Paul
>
>Paul S. Anderson (full signature block info should be at the end of this 
>message.)
>
>At 03:34 PM 6/14/02 +1200, Graeme Williams wrote:
>>Hello Rebecca,
>>
>>Sweet Chestnut should not cause any problems if used for down draught
>>gasifiers.  As with all woods used for gasification, the moisture content
>>should be as low as possible (15 - 20%) and you need to closely monitor the
>>chip size.
>>
>>The big trap for most projects drawing wood from city forestry, is the use
>>of drum chippers which make a lot of fines and is very poor gasifier fuel. I
>>am pretty sure there was a lot of chestnut chipped at Rural Generations
>>Brook Hall Project in Londonderry following Winter gales a couple of years
>>ago and there were no unusual problems, although it was mixed with other
>>hardwoods.
>>
>>Make sure you use a screw auger chipper with a medium size chip (50 x 25 x
>>5) and it should work fine.
>>
>>Problems with coppice willow gasification can be overcome with a correctly
>>designed gasifier, and again the correct cutting size of the chip.  If you
>>haven't done so, you can read about our work with the fuel on the Fluidyne
>>Archive www.fluidynenz.250x.com
>>
>>Hope this helps
>>
>>Doug Williams
>>FLUIDYNE GASIFICATION
>>
>>
>>-
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>>
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>>http://www.crest.org/articles/static/1/1011975339_7.html Gasification
>>http://www.crest.org/articles/static/1/1011975672_7.html Carbon
>
>Paul S. Anderson, Ph.D.,  Fulbright Prof. to Mozambique 8/99 - 7/00
>Dept of Geography - Geology (Box 4400), Illinois State University
>Normal, IL  61790-4400   Voice:  309-438-7360;  FAX:  309-438-5310
>E-mail: psanders@ilstu.edu - Internet items: www.ilstu.edu/~psanders
>
>
>-
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>
>Gasification List Moderator:
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>www.webpan.com/BEF
>List-Post: <mailto:gasification@crest.org>
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>-
>Other Gasification Events and Information:
>http://www.bioenergy2002.org
>http://www.crest.org/articles/static/1/1010424940_7.html Bioenergy
>http://www.crest.org/articles/static/1/1011975339_7.html Gasification
>http://www.crest.org/articles/static/1/1011975672_7.html Carbon
>
>

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Gasification List Moderator:
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www.webpan.com/BEF
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Other Gasification Events and Information:
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http://www.crest.org/articles/static/1/1011975339_7.html Gasification
http://www.crest.org/articles/static/1/1011975672_7.html Carbon