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<DIV><FONT size=2 face=Arial>All,</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Talking about stoves at the InStove Stove
Summit and Aprovecho Stove Camp made me think through the workings of our
Wonderwerk TLUD-ND. I needed to create a working hypothesis
of why it burns as cleanly as it does. Attached is the
hypothesis. It may not be completely correct, but it does provide an
explaination, or at least a place to start an explaination. There
is a lot that I don't know about this burning method and a
lot of work left to be done.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>At Stove Camp, Sam Bentson, Aprovecho's lab
engineer offered to help me probe into the pressure variations in the
stove. I was sadly involved with too many things to take him up on
it. My loss! What I did do was to support Dennis, a visiting
student from China, in his development of a wok support with skirt and
chimney. </FONT> <FONT size=2 face=Arial>He tested it on top of the
latest Wonderwerk TLUD-ND stove and the results were impressive. He made
several adjustments to the dimensions which seemed to improve its performance
even more. He required only high power and no turn-down.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>After Stove Camp I visited with Jon and Flip
Anderson. We put an older Wonderwerk TLUD-ND under one of their clay
ovens, and baked a cake. It required two fuel (vertically arranged split
sticks of an unknown variety of hardwood) loadings of the stove, the first to
heat the oven and give about 30 minutes of baking and the second finished the 1
hour baking time. This showed the need for turn-down capability for oven
baking. The latest Wonderwerk stove, which I had left at
Aprovecho, would very likely have done it with only one load of fuel,
because of better turn-down and more efficient burning.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>I hope you enjoy looking through the
hypothesis.</FONT></DIV>
<DIV><FONT size=2 face=Arial>Kirk H.</FONT></DIV>
<DIV><FONT size=2 face=Arial>Santa Rosa, CA. USA</FONT></DIV></BODY></HTML>