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Home Made / Re: Start of ultra high efficiency gasifier boiler build
« on: October 30, 2012, 06:21:58 PM »
Actualy its an inverted mechanicaly fluidized bed, I presurize the fire box and burn in a bed of ceramic marbles. my new furnace will have a variable speed high presure blower and a digital manometer so i can optimize the burn. Whats a T.L.U.D.
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Home Made / Re: Start of ultra high efficiency gasifier boiler build
« on: October 21, 2012, 07:06:49 PM »
I love your workmanship, very professional. I am starting on designs for my third build, your info is great but I have built a owf of a different animal. I call it an inverted fluidized bed, I get high temps , gasification and no fire brick. I have been running it now for four years heating a 2800 ft house and hot water. It does it very efficiently with minimal smoke. my new build will address a few issues and hopefully improve on what I have already done . I need to increase the size of my firebox as it is quite small , it still gets 12 hr burn times in cold weather. I am also going to modify the shape , hoping to increase efficency. I have read your posts with much interest and have also followed your build, very impressive. My next build may take me a while as I have lost access to a fab shop. I'm working on a shop of my own and my press brake is eagerly waiting on my driveway under a tarp.
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Home Made / Re: gasser questions
« on: March 12, 2012, 04:02:57 PM »
Great reply Yoderheating, you hit the nail on the head........................
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Home Made / Re: gasser questions
« on: March 07, 2012, 03:53:44 PM »
Scott7m is correct, many boilers have hundreds of ft of tubes in them, makes for huge sq. ft. of heat exchange , but that's not possible in a smaller unit.
If you have ever seen in fared pictures of heat ex changers you would notice that any sharp outside corners or the nobs that protrude from the inside walls of cast iron boilers are much hotter than the surrounding surfaces, they collect heat and transfer it into the water.
If you look back at earlier posts you will see where members who have built furnaces, and Evan some who have bought furnaces realize all that air going in the front and zipping out the stack isn't doing any good if it takes all Btu's with it , the first thing they want to do is put in some type baffle, which can improve efficiency , but how does it do it ? a piece of plate blocking the exhaust path can help by slowing down the air flow, but that same pc of plate isn't transferring
any heat into the water jacket, its just storing heat to let it escape out the chimney later.
so with some thought you can build these restrictions into your furnace, [ i call them spoilers] so that they are part of heat exchange system.
so getting back to square or round , i prefer square, it might not be as easy but it lets me mess with the air flow ............. just my thoughts
If you have ever seen in fared pictures of heat ex changers you would notice that any sharp outside corners or the nobs that protrude from the inside walls of cast iron boilers are much hotter than the surrounding surfaces, they collect heat and transfer it into the water.
If you look back at earlier posts you will see where members who have built furnaces, and Evan some who have bought furnaces realize all that air going in the front and zipping out the stack isn't doing any good if it takes all Btu's with it , the first thing they want to do is put in some type baffle, which can improve efficiency , but how does it do it ? a piece of plate blocking the exhaust path can help by slowing down the air flow, but that same pc of plate isn't transferring
any heat into the water jacket, its just storing heat to let it escape out the chimney later.
so with some thought you can build these restrictions into your furnace, [ i call them spoilers] so that they are part of heat exchange system.
so getting back to square or round , i prefer square, it might not be as easy but it lets me mess with the air flow ............. just my thoughts
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Home Made / Re: gasser questions
« on: March 06, 2012, 05:00:39 PM »
Hi Bewford, square is always better, sharp corners ,lapped seams, any thing that can obstruct the air flow helps with heat transfer.
a round cylider is way to easy for air flow.
a round cylider is way to easy for air flow.
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General Outdoor Furnace Discussion / Re: stack temps, firebox temps
« on: January 13, 2012, 08:54:32 PM »
thank you bull, this is a great site , wish i'd found it before . seems to be a lot of my kind of folks here.
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General Outdoor Furnace Discussion / Re: stack temps, firebox temps
« on: January 12, 2012, 03:04:23 PM »
thanks for spelling help, it maxes out at 1200.
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General Outdoor Furnace Discussion / Re: stack temps, firebox temps
« on: January 12, 2012, 02:34:25 PM »
i seem to be running very high fire box temps, maxes out my infered thermometer. makes for short cycle times. my stack temp is high at 380.
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General Outdoor Furnace Discussion / stack temps, firebox temps
« on: January 12, 2012, 02:07:41 PM »
just curious, anybody monitoring temps?
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