[Gasification] Bhattacharya and AIT gasifiers and briquetting

[psanders at ilstu.edu]

Dear Professor,

Thank you for your comments and the Internet addresses.  Many good 
things are in
those reports, including info about briquetting that many people should be
reading.

The Institutional Gasifier Stove (IGS-2) is seen in:
Technology Packages:  Screw-press briquetting machines and briquette-fired
stoves   and found at:
http://www.retsasia.ait.ac.th/booklets/Dissemination%20Booklets-Phase%20III/Tech%20Pack-BB-low%20resl.pdf

I believe that the IGS-2 is a cross-draft gasifier with the advantages of
continuous feed of the fuel.  Note that there is a water seal on the 
top of the
fuel hopper, and the gases are discharged low and to the side.  This can give
very good results as a true gasifier and it merits close consideration by
others.  But the IGS-2 does not conform with basics of the TLUD technology.

Again, thanks for the input on both gasifiers and briquetting.

Sincerely,

Paul

Quoting "Prof. S.C. Bhattacharya" <sribasb at gmail.com>:

> Before retirement from the Asian Institute of Technology (Thailand), two
> stoves were developed under a Sida-funded regional project. The stoves are
> briefly described below and their photographs are attached. The descriptions
> and photographs and much more information on the prtoject can be found at
> http://www.retsasia.ait.ac.th/photogallery.htm
> Dissemination booklets giving design of some stoves are also abailable at
> http://www.retsasia.ait.ac.th/booklets.htm. Information on stoves and
> briquetting is available in the Technology packages on screw-press
> briquetting machines and briquette-fired stoves.
> The top-down burning stove is basically similar to the TLUD stove it seems.
>
> --------------------
> 1) The Institutional Gasifier Stove (IGS-2) consists of five main parts: a
> fuel storage hopper, reaction chamber, primary air inlet, combustion chamber
> and a 2-pot support. Experimental results indicate an average efficiency of
> 17% with ricehusk briquettes (two-pot configuration), 27% with wood chips
> and 22% with wood twigs as fuel. The stove appears to be promising for
> community type cooking, particularly for institutional kitchens and
> traditional cottage industries.
>
> 2) The top-down burning appears to be able to burn biomass with much less
> smoke compared with conventional burning. In top-down concept, some kindling
> is put at the top of the fuel bed and ignited. The fire moves progressively
> down through the layers of the fuel. The main advantage of the top-down
> concept is minimal smoking. The two-pot top-burning stove jointly developed
> by the Institute of Energy, Vietnam and AIT, Thailand could use ricehusk
> briquettes and wood chips/twigs as fuel.
>
> S.C. Bhattacharya


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