Wyndham Dennison on thu 17 jul 08
With the increase in fuel cost, I have been looking into designing a
downdraft kiln in similar ways to the Geil kilns where the burners come
up from the floor. If any here have used this style of kiln, how is the
fuel usage in something like a stacking 24 + cu ft kiln. Since these use
4 low pressure burners on a side(8 total), does the gas line feeding the
burners need to be somewhat larger in dia. to keep from starving the
burners. Most gas lines are either 1/2 in or 5/8. I'm thinking that
3/4in or 1in might be needed. I'm using 3/4" right now
Right now my kiln has 6 burners- 3 on a side onto a bag wall and the
stacking area is about 36+ cu ft with a cost of about 80 gal of propane
per9-10 hr reduction firing(high pressure regulator). Which is
2-2.2/gal per cu ft. I know the other style is the Minnesota flat top
with 2 B3's in the back and can be more efficient than mine. I'm also
thinking a 24cu ft car style might save fuel and my back. My current
kiln is double wall(9") and I believe the Geil in 4.5 is that correct?
Thanks for any thoughts, Wyndham
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