Dear Bruce
----- Original Message -----
From: "Bruce Jackson" <[email protected]>
To: "Discussion of biomass pyrolysis and gasification"
<[email protected]>
Sent: Wednesday, December 22, 2010 9:57 AM
Subject: [Gasification] now for something really boring...
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Where can I look to see the experimental results of heat transfer through
wood?
# You are on the right track with your questions. The answers all flow from
here:
http://en.wikipedia.org/wiki/Biot_number
Best wishes,
Kevin
I took to heart what folks said about destructive distillation. What I see
in
the stove, is that the wood isn't absorbing the heat as fast as the heat
from
the burning outer surface is making it. In other words the wood is both
destructively distilling, and drying.
It made me wonder what would be the optimal BTU input per pound (insulated
container of course) for wet wood.
Also I wonder does the BTU input vary after the moisture content changes?
(this
from distilling ethanol, you need higher temps at the end of a batch run to
push
the EtOH out of the remaining water) I was thinking about the center of the
blocks being so well insulated by the remaining carbon that the water
couldn't
see the heat right away (or as fast as the water on the outer perimeter
does).
Or is this a case of very gently heating the blocks until they are above
212F @
1ATM, then cranking up the input.
I betcha betcha these things are known extensively in Robert Kana's
community
of furniture manufacturing.
thanks,
BPJ
"LOOK! A chicken!"
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