[Stoves] old patent-paper about a saw-dust stoves

[Tom Miles]

Marc,


Thanks for the link. You can find three of the authors at the photos I
posted from the 2004 ETHOS meeting in Seattle where Mark Bryden and dean
Still invited Prasad, Visser and Verhaart. 

http://www.bioenergylists.org/stovesdoc/ethos/ethos_jan_04.htm

 

Larry Winiarski is also pictured. Larry adapted the feeding concept of the
old ("Conifer") sawdust burners to continuously side feed a rocket stove
similar to his self feeding chumal (ETHOS 2005) 

Conifer http://www.hernironworks.com/conifer.html

He also used the concept for burning risk husks to fire boilers at a tea
plantation. 

http://www.bioenergylists.org/stovesdoc/ethos/ethos_jan_05.html

 

The ARTI Vivek can burn sawdust. 

http://www.samuchit.com/index.php?option=com_content&view=article&id=1&Itemi
d=3

http://www.arti-india.org/

 

How about the Mayon Turbo by REAP?

http://www.reap-canada.com/bio_and_climate_3_3_1.htm

 

Richard described a sawdust stoves in 2004 at:

http://listserv.repp.org/pipermail/stoves_listserv.repp.org/2004-November/00
0374.html

 

I first learned about this stove in the late 1970s from one of our clients.
We had designed a circular portable sawmill that became popular in
developing countries. (http://www.mightymitesawmills.com/ ) when you square
a log you get slabs and edgings, sawdust and lumber. In developing countries
villagers used the slabs and edgings from the mill for firewood or to build
houses. The wide kerf (width of cut) of the circular saw converts about 20%
of the log to sawdust. We always hoped to find efficient ways to convert the
waste materials to heat and power. A salesman returning from Africa
described villagers burning sawdust from the mill in what he called a "Ghana
stove", which was essentially what Richard described. My notes from building
and testing the stove December 21, 1979 remind me that it was difficult to
get a consistent burn or control air throughout the burn. Measuring air
flows and analyzing gases was also a challenge.    

 

I hope to see many of you at ETHOS in Seattle later this month. 

http://www.vrac.iastate.edu/ethos/conference.php

 

Regards,

 

Tom Miles

 

 

 

 

From: stoves-bounces at lists.bioenergylists.org
[mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of Marc Pare
Sent: Sunday, January 16, 2011 7:10 PM
To: Discussion of biomass cooking stoves
Subject: Re: [Stoves] old patent-paper about a saw-dust stoves

 

I plodded through the bioenergylists archives looking for sawdust stove
discussions a few months ago in the hopes of finding information the would
be helpful for natural draft rice husk stoves. I believe the most fruitful
thing to search for is "WWII sawdust stove"

I only found one class of design: an outer cylinder and inner tube. You
light the sawdust from the bottom and the inner tube draws air to sustain
the combustion. It is possible to just use a stick and pack the sawdust
instead.

There are a few stoves in A Woodstove Compendium
<http://www.appropedia.org/A_Woodstove_Compendium>  that operate on this
principle. I had some Bolivians draw me such a design when they visited our
group in Atlanta. Apparently they are rather commonly used for drying/curing
operations.

It's not hard at all to get them going. In fact, we melted a few of our
sheet metal cylinders because they would go out of control. Made some nice
looking sculptures as a result.

Has anyone had different experiences? I was not able to find anything recent
on sawdust (and other fine bio-material) combustion in cook stoves. 

Marc Paré
B.S. Mechanical Engineering
Georgia Institute of Technology | Université de Technologie de Compiègne

my cv, etc. | http://notwandering.com



 

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