[Stoves] Wet chip stove test.

[Otto Formo]

Dear Tom,

I am so happy to hear about your and Alex tests of wet fuel in gasifiers. 

I have tried, for some time, to convince my colleauges that a top lit charcoal makeing gasifier, would perform quite well, even if somepart of the fuel is wet.
I tried with some mixed wet woodchips at the bottom of the combustion chamber and proper dry ones on top, but it didnt work out very well.
The moisture content was between 30-50% at the bottom and 5-10% of the top layer.

Now, I can see, you should not mix it, but put it into layers, correct? 
I will try out this further more, because it will allways be a challange to find sufficient dry fuel during the rainy season in tropical regions.

Enjoy still. the warm beaches of Florida.

Otto

> From: Thomas Reed [tombreed2010 at gmail.com]
> Sent: 2012-02-10 17:12:50 MET
> To: stoves at lists.bioenergylists.org
> Cc: stoves at lists.bioenergylists.org
> Subject: [Stoves] Wet chip stove test.
> 
> Dear Stoves/gasification
> 
> The TLUD stoves is unique in NOT burning the charcoal as it gasifies only the cellulose, leaving charcoal behind.  However, the charcoal is a buffer against using wet fuel. The PYROLYTIC gasification of the cellulose portion can't proceed in the next layer until the fuel is dry.  So, some of the charcoal is burned to dry the next layer if the fuel is moist.  
> 
> Alex English and I tested this by adding water to bags of dried chips to make 0,5,...30% moisture test fuelsand burned them in the WoodGas stove.  The bone dry chips produced 25% charcoal, and the 30% moisture chips produced only 3% charcoal with a very blue flame because the charcoal was mostly consumed to ignite the wet next layer. 
> 
> So the WoodGas stove has more tolerance for moist fuel than other stoves due to the production of charcoal during gasification of the cellulose.  
> 
> Onward!
> 
> Tom Reed in Cudjoes Key, FL.
> 
> 
> 
> Dr Thomas B Reed 
> The Biomass Energy Foundation
> www.Woodgas.com
> 
> On Feb 9, 2012, at 6:38 PM, stoves-request at lists.bioenergylists.org wrote:
> 
> > 
> > 
> > What I do know is that you needs to heat the bqs for a few minutes to say ? an hour and get up to 150 - 175 degrees (F). 
> > I know that if you do this you will  get: 
> > 1) No smoke;  pure aroma-- and
> > 2) a bone dry fuel ready to ignite up insertion with little if any smoke charcoal burns, drying the next layer 
> 
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