Jeff Lawrence on fri 6 jan 12
Hi,
I'm redoing the flue on my IECK (improbably expensive cheap kiln) and
got some great tips from Hank Murrow on casting dual flues on a
similar unit. Then I started thinking about it too much. wondering if
and how flue layout affects atmosphere in an updraft kiln.
As a thought experiment, imagine the IECK with three burners on each
side. I can easily imagine that one central hole would give easy
passage to gases from the central burner ports on each side, since
their path is pretty much a straight shot up along wall and arch. For
the corner burners, though, I suffer pangs of pity. Mightn't their
exhausts suffer from gassy congestion, twisting and straining to find
their way out? (this anthropomorphic view is solely to dramatize the
trivial - don't try this in serious discussions).
By contrast, imagine the harmonious exhalation - like triple contented
sighs of relief - from three exit flues, one above each pair of burner
ports. Would such an arrangement minimize gas congestion and help
provide a more even reduction atmosphere? Or would it make no
difference and just be 50% more wasted time?
Hmmm...
Jeff Lawrence
jefflawr@gmail.com
Hank Murrow on sat 7 jan 12
On Jan 6, 2012, at 10:56 PM, Jeff Lawrence wrote:
> Then I started thinking about it too much. wondering if
> and how flue layout affects atmosphere in an updraft kiln.
I have done that too! Many times......
>=3D20
> As a thought experiment, imagine the IECK with three burners on each
> side. I can easily imagine that one central hole would give easy
> passage to gases from the central burner ports on each side, since
> their path is pretty much a straight shot up along wall and arch. For
> the corner burners, though, I suffer pangs of pity. Mightn't their
> exhausts suffer from gassy congestion, twisting and straining to find
> their way out? (this anthropomorphic view is solely to dramatize the
> trivial - don't try this in serious discussions).
Been there.......
>=3D20
> By contrast, imagine the harmonious exhalation - like triple contented
> sighs of relief - from three exit flues, one above each pair of burner
> ports. Would such an arrangement minimize gas congestion and help
> provide a more even reduction atmosphere? Or would it make no
> difference and just be 50% more wasted time?
If you value the experiment more than your time....... worth a try.
However, it may weaken the arch a tad unless carefully done, and will =3D
require a more elaborate damper system; while offering the opportunity =3D
to have different damper settings for each hole; which may or may not =3D
make a difference.
Cheers, Hank in Eugene=3D
Lee on sat 7 jan 12
On Sat, Jan 7, 2012 at 12:56 AM, Jeff Lawrence wrote:
> By contrast, imagine the harmonious exhalation - like triple contented
> sighs of relief - from three exit flues, one above each pair of burner
> ports. Would such an arrangement minimize gas congestion and help
> provide a more even reduction atmosphere? Or would it make no
> difference and just be 50% more wasted time?
Typically, you try to make the flue exist not be a straight like,
for efficency, to help distribute the heat throughout the kiln.
Think of 3 hoses at the bottom of the kiln pointing up and existing
directly out the top hole without any travel to the middle.
But experimenting is interesting.
--
=3DA0Lee Love in Minneapolis
http://mingeisota.blogspot.com/
=3DA0"Ta tIr na n-=3DF3g ar chul an tI=3D97tIr dlainn trina ch=3DE9ile"=3D9=
7that is, =3D
"The
land of eternal youth is behind the house, a beautiful land fluent
within itself." -- John O'Donohue
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