Re: GAS-L: Small Scale Gasifiers

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

Doug and all,  ( am sending to the Stoves list also because this topic is 
at the interface of interests between the two groups.)

Yes, the discussion is fruitful.

One thing I learned in your message below is just how different our 
definitions can be.

For example, the web link you provided went to a site about what we call in 
America "pellet stoves".  Although gasification of wood mass takes place 
(as it does in ALL burning), I and others on the Stoves list have not 
thought of pellet stoves as being "gasifiers" and we on Stoves list do NOT 
discuss much those heating device for the developed world.

When I refer to "small gasifying units", I mainly think of the size of 2 of 
one-gallon cans or maybe as big as a 5 gallon (20 liter) bucket.   and with 
no moving parts except possibly adding on a very small fan for forced 
convection.

So I feel that the issue of "gasification for domestic use in small stoves" 
is still very much a valid topic for the Gasification list.  The problems 
of NOx and other such things are very important to domestic "burning units" 
whether for cooking (stoves) or for heating (space heater or water heater).

Thanks very much for the document on the small gasifier that you have 
designed (described as " 5 - 10 kW " on the Figure 4.2.3) .   At first I 
did not realize that what I wanted was the "Download the Pioneer Class 
gasifier design article" that is in the "Anniversary project" archive file.
http://www.fluidynenz.250x.com/

And now that I have the document, I will need to study it to understand 
well your design.  But I can tell right from the start that I like the size 
of it.   For me, your design is on the "large-side of the small-size 
gasifiers".   In comparison, my stuff is in the "micro-gasifier size" and 
so much smaller.

This leads me to additional questions, but I leave them for a later message.

Paul


At 08:20 PM 6/28/02 +1200, Graeme Williams wrote:
>Dear Paul & Colleagues,
>
>It's pleasing to see the Gasification List come alive again, and what's more
>unveiling the issues that each of us in our own way are trying to resolve.
>With such healthy input, surely our gasification technologies can be
>presented in an orderly fashion to the less informed, and where possible
>support those who strive on our behalf behind the scenes.
>
>I have to say that in our debate on small gasifiers, the addition of stoves
>just doesn't fit right in my mind, although you could call them process heat
>gasifiers and try and find them in the "Yellow Pages".
>
>Here in New Zealand there is a healthy market for such stoves and there must
>have been 20 - 30 different models and sizes on a display I saw a few weeks
>ago.  I know the KENT brand was sold in the USA a few years ago, and they
>made a big thing out of the emissions being far less than the US standards.
>Possibly these types of stoves are a New Zealand development, as I know a
>lot of work was done to perfect their design principle in the old DSIR
>laboratories.
>
>To read a nice explanation with diagrams, check this web page -
>www.energywise.co.nz/content/pdf/demo59.pdf and hope the whole discussion on
>these wood burners can be passed back to "Stoves".
>
>The gasifier design that I mentioned can be found on the Fluidyne Archive -
>www.fluidynenz.250x.com
>
>I hope this clarifies some of the issues
>
>Doug Williams
>FLUIDYNE GASIFICATION
>
>
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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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