[Stoves] Burning wet wood

[rongretlarson at comcast.net]

Crispin, list etal 

This below may be true for "burning", but it has not been my experience for pyrolysis. Colorado is pretty dry and I never experienced a smoke problem due to dryness. I hope someone with a TLUD will "bake" some wood or pellets for awhile and report their results. If a fuel dryness problem exists for TLUDs, it is not clear why that should be so. During pyrolysis a lot of water is created through numerous chemical reactions . 

Yes problems for wet wood with TLUDs. Explicit detail is somewhere in this list's archives. Andrew H is expert on fuel wetness. 

Ron 

----- Original Message -----
From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com> 
To: "Discussion of biomass cooking stoves" <stoves at lists.bioenergylists.org> 
Sent: Wednesday, June 12, 2013 1:11:31 PM 
Subject: Re: [Stoves] Burning wet wood 




Dear Frank 



Burning very dry wood is difficult and it makes a lot of smoke. That is why stoves should not be evaluated with very dry wood when they are designed to burn ‘ordinary wood’. 



If you get the conditions right for the early fire they are double-guaranteed o be wrong for the late fire. Much better a continuous input of damp material. 



Regards 

Crispin 



++++++ 





Dear Crispin, Tom and all, 



I would think a batch mode would be better. A continuous mode means you have water vapor all the time. In batch mode one would heat and find the gas temperature goes to 100c. Then when the water is finally burned off the temperature rises and you can then push the fuel forward to do what you want to do with the now dry wood. Not sure this happens and have not seen a graph of this but think this is what would happen. 



Frank 
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