[Stoves] Grass Gasification

[Paul Anderson]

Stovers,

I am forwarding a message from Paal Wendelbo this is quite informative 
about pyrolysis of grass fuel in his Peko Pe.    It should apply to all 
true TLUD stoves with full diameter access to the fuel chamber.

I now ask Paal:   Please discuss the "grasses".   There are so many 
types.   Do your comments / experiences relate to certain types (such as 
those with nice stiff stems, which species??) more than to other types 
of wavy / leafy  grasses?

Also, the diameter of you stove is important to get 1/2 kg in a bundle 
that is 20 cm tall.    Did you have stoves with different diameters?

Very important info you gave about difficulties when the grasses are 
simply packed in (not in bundles of vertical stems).

Paul

Paul S. Anderson, PhD  aka "Dr TLUD"
Email:  psanders at ilstu.edu   Skype: paultlud  Phone: +1-309-452-7072
Website:  www.drtlud.com

On 8/23/2013 3:09 AM, Paal Wendelbo wrote:
>
> Dear /Janitha Bandara///
>
> Thanks for mail. I can’t say I have done any gasification researches 
> for grasses, but In have done a lot of practical use of straw ( 
> hyperrenia rufa) as fuel for household cooking in Uganda in 1995, with 
> the Peko Pe TLUIFD-ND stove. We found the best way to utilize the 
> straw was to cut it to the height of the stove, 200 mm, made it into 
> bundles of ½ a kg and put it into the stove. The bundles was burning 
> nicely without smoke for about 20 minutes on the flame and another 20 
> minutes on the glowing since the glowing straw did not collapse like 
> other types of fuel.
>
> You have a nice clean flame on the generator, probably a bit too high, 
> depend what kind of use//it is designed for. I should like to know 
> more about the aim of the construction. Is it to produce gas or to 
> produce energy for something else?
>
> Regarding I insulation, be aware of higher temperature will strain the 
> metal in the combustion chamber, air could be better with double 
> function, cool down the temperature on the metal and the same time 
> preheat secondary air.
>
> If you stamp grass into the generatorto prolong the process, there 
> will be a problem of air going through, a 50 mm vertical channel in 
> the middle  will solve the problem.
>
> With regards Paal W. paaw at online.no <mailto:paaw at online.no>
> *From:* janitha chandimal <mailto:janithjc at gmail.com>
> *Sent:* Wednesday, August 21, 2013 11:32 AM
> *To:* paaw at online.no <mailto:paaw at online.no>
> *Subject:* Grass Gasification
> Dear sir, Pall Wendelbo,
> I m writing this according to the information got from Paul Anderson, 
> Golden, Colorado and He said that you had done gasification researches 
> for grasses. Me too is doing my masters research on gasification of 
> guinea grass (Panicum maximum) and I have got some fine results. It is 
> a small scale system having 700 mm height and 200 mm in diameter. But 
> the main problem involved is the quick exhaustion of feed stock and 
> the compaction of grass. I have here by attached my drawing and few 
> pics of the flame. looking forward to hear from you soon. Thank you.
> Best regards
> -- 
> */Janitha Bandara/*
> /PG Student, Dept. of Chemical & Process Engineering, University of 
> Moratuwa, Sri Lanka/
> /0094713058696/
> //
> /*Take Hands in Reducing Consumption, Saving Resources & Protecting 
> Environment*/

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