[Stoves] TLUD gasification rate research ....

[Frans Peeters]

Dear  J. winter  and all,

 

   “ Primary air was FIXED” needs a better definition . Means :”made this way” or was” kept constant” ?

My experiments show that gasification only happens at a  narrow gap of burn speed !

The burn speed depends of the air attenuation.

This attenuation depend on the fuel size and fill factor  grate hole size =mesh ,stove  input holes .

Air input  speed depends on the  shimney suction and invers on the sum of attenuations and new growing ash clogging the grate !

So you never have a FIXED=CONSTANT  burn-speed and never an ideal gasification the whole run .

Unless you use compressed air regulated in a constant output regulator connected to a closed bottom TLUD .

   So your grate is not a speed fixer in series with,  may be greater attenuaters .

Al experiments are worthless to others  without to give the fuel size and fuel fill factor  fill stock height .And stove measurements .

Burn speed is to high in the beginning with 30 cm flames outside the stove due the volatiles  methanol aceton and acetic acid and pine oils or other .

Slow inward flames into the secondary holes  indicate good gasification .

Lower fuel stack gives no flames into the sec. air holes !

Measuring burn speed or smoke speed is difficult . Two FENWALL  glass beat thermistors 1 MOHM, or manganine wire spools,  gas-speed measurement in the air input and chimney must be possible.

Both electro heated and one cooled by a gas at lower temperature . See wind speed measurements .  

 

Happy experimenting .

Regards

Frans

 

 

 

 

 

Van: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] Namens Julien Winter
Verzonden: vrijdag 20 februari 2015 17:36



 

The experiment I conducted was to the look at the range of maximum fuel bed temperatures in a natural draft, top-lit updraft gasifier.

 

The primary are was fixed for each run by fitting a grate with a set aperture.




 





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