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water injection/ wood firings

updated wed 6 oct 99


Dannon Rhudy on tue 5 oct 99

David, I hear that there was lots of discussion of water/wood kilns at
the wood conference - maybe some one(s) of the attendees will tell
us all. Or tell us some - all may be more than we want to know. I
understand that the Australians had some interesting methods of
building kilns to assure some moisture in the firings.


Dannon Rhudy
At 06:33 PM 10/4/99 EDT, you wrote:
>----------------------------Original message----------------------------
>Not being the scientific type like Gavin and Ivor, I
>usually know what's happening by experience, but
>couldn't explain why scientifically.
>Anyway, I know that I like my kiln wood to be slightly wet.
>I'm glad to be told what's happening in the combustion
>Ivor, would you tell us what methods people are using to
>inject water into the airstream of their wood-fired kilns?
>David Hendley
>Maydelle, Texas
>----- Original Message -----
>From: I.Lewis
>Sent: Friday, October 01, 1999 2:12 PM
>Subject: wet wood
>----------------------------Original message----------------------------
>Gavin Stairs seems to be having some trouble with those long words. Must say
>was fascinated with "monotonically descending curve like an exponential".
>Now I think I know what he means from the context of his posting but is the
>he is looking for Asymptotically, meaning that it only approaches but never
>reaches a steady value. The difference is so small that it is almost
>I really do like Monotonically. In a poetic sense it is a fair description,
>boring line. Almost as boring as the process of desiccation.
>One notion which has not been mentioned, or so it would seem unless I have
>missed something, is the additional calorific value of wet wood due to the
>Gas reaction. Above about 1100Celsius, superheated steam reacts freely with
>carbon to give free hydrogen and carbon monoxide. So wet gas striking those
>white hot coals in the fire box can give free combustible gas which promotes
>increasing temperature as it burns with secondary air and the potential for
>highly effective reducing atmosphere. I know that some people who fire with
>are now injecting water into the airstream. Given the potential high flame
>temperature of burning hydrogen perhaps this style of firing should be
>investigated further.
>Always looking for things to torment my simple mind.
>Ivor. In South Oz, where we now have a studio with a concrete floor which is
>process of being sealed.