Re: Gasifier fundamental question

["Paul S. Anderson" <psanders@ilstu.edu>]

Stovers,

Crispin wrote, and I emphasize:::::::

>Many thanks for all the energy contributors spend adding fuel to this fire!

And that includes Crispin messages, too.

Short Notes from Paul:

1.  Ron correctly notes that MY terminology (such as use of "burning" when 
I should say "pyrolysis") leaves much to be desired.  But Ron responded so 
well that now Crispin has been able to respond with some clear statements 
that raise questions.

2.  When properly functioning (which was not the case with my stoves on 
Crispin's patio), the Juntos stove does NOT give noticeable "smoke" (that I 
think of as "visible particles"), but there are certainly some issues of 
unseen gasses, as with all stoves.  When the Juntos gasifier unit has 
sufficient chimney of a couple of inches, the gasification goes to the end 
without smoke, with the result being only glowing charcoal.  Problems arise 
when some of the fuel has fallen through the grate and therefore continues 
to give gasses (smoke) when the charcoal is removed.

3.  A stove that is lighted, functioning, and hot is a different beast from 
a cool-start stove.  Therefore, adding in fuel on top of a hot charcoal bed 
WITH EXTREME CONTROL OF THE PRIMARY AIR  entering under the charcoal COULD 
(in my humble opinion) have pyrolysis gasification down low where the 
charcoal is in contact with the new fuel and then also have the secondary 
combustion of the gases a few inches above the top of the fuel load.  But 
issues of fuel types (including different moisture content of the same 
fuel) could become more important than when those fuels were in the 
top-lighted gasification configuration.(?)

Please keep the comments coming, and feel free to separate out the diverse 
topics into separate threads of messages.

I am learning, and I hope others are also.

Paul





Paul S. Anderson, Ph.D.,  Fulbright Prof. to Mozambique 8/99 - 7/00
Rotary University Teacher Grantee to Mozambique >10 mo of 2001-2003
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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