https://elixirfield.blogspot.com/2022/01/finally-new-wood-stove-design.html part one
https://elixirfield.blogspot.com/2022/01/clean-burn-ceramic-fiber-board-wood.html part two
I ordered a welded stainless steel 48 inch length 6 inch diameter stove pipe to hold the extreme heat the wood stove will kick out. If it's not welded then otherwise the "pop" together crimp seam could easily explode out from the pressurized heat.
I wanted welded but their "black" stove pipe off gases toxic paint fumes - and doesn't cure that well. So better to go with stainless.
https://www.northlineexpress.com/6-x-48-durablack-stainless-steel-single-wall-pipe-6dbk-48ss-5695.html#more-info
https://www.michiganheatexchanger.com/
So I ordered heat exchanger strips from this person - vid
So those are galvanized steel
Other brands are "aluminum" heat exchanger strips.
They are very little thicker than heavy duty aluminum foil. Great design but inadequate at providing much extra heat.
So not as effective!!
So then the Heat Exchanger manufacturer in Michigan - he recommends a fan also to double the heat exchange rate.
Ecofan AirMax Aluminum Heat Powered Wood Stove Fan
So because this heat-powered fan is aluminum that it can handle higher temperature on the wood stove.
So I ordered that fan.
Thermoelectric generation fan vid review
The hotter it gets the faster it turns.
So I got the small size fan and heats 120 square feet - which is precisely what I have.
The more air that passes over the pipes the quicker and more heat will
be drawn from the source also. So you get not just air moving but more
heat wicking also.
So the idea is to have a small "clean burn" 1100 Fahrenheit fire box - inside the wood stove - and then have thermal mass on the stove - as water - to store the heat -
Then have the fan on top of the stove and the heat exchangers around the stainless steel duct pipe.
Because the exist smoke should be hotter - then I can pull more heat off the duct pipe so that there is still no creosote.
So I got the 8 inch Ecofan
It runs off the heat of your woodstove and you get warm air in far corners of your house. The difference is very clear
So it has a 650 degree limit - so that means I can't get the top of the wood stove hotter than that. If I did then the stove would get cherry red - dangerously anyway.
@Double M Innovations Is most of your smoke going out of the back of the ceramic insulation fire box then up and over towards the front to the collar exit? I'm just wondering how hot your stove is in the back - as you have fire brick still in the back But the top of the stove back there is not insulated. I assume as the Century comes with firebrick in the back. thanks.
I got the ceramic fiber board already. I ordered heat exchanges that are steel - the "fin" strip designs - six of them - plus a thermogenerator fan, 8 inch. Plus I am switching out the duct pipe that I have at 30 degrees 4 feet for a stainless steel welded pipe that I ordered to withstand the increased temperature and pressure.
So I will have to put ceramic board in the back of the stove as I have no fire brick in the back wall - and then make the fire box with another wall - for the smoke to exit out the back.
My question to you is because the Century baffle closes off all the way to the back but I'm assuming your insulated fire box does NOT close off all the way to the back? So you took out the Century baffle - to open up that back for smoke exit - but it seems like the top of the stove back there then would be much hotter. And you never gave a temperature reading for back there. So do you have one? thanks
How long with that stove pipe last on the rocket stove? The mass
heater rocket stoves will burn out stove pipe if they are not designed
carefully - and I think it's a 350 degree on galvanized steel for long
term burn temp limit. This is the same question I have on your barn
stove - I understand that the insulated fire box is for a clean burn.
The key question is how hot or why the stove doesn't get as hot in the
back top - is the back top insulated? As far as I can tell it is not.
Does the baffle go all the way to the back? You took out the Century
baffle and you say that your insulated fire box opens up in the back -
so the smoke goes up. Can you do a temperature reading on the back top
of the wood stove? Could you explain why it doesn't get that hot if the
fire box is 1300 F.? Steel is not supposed to burn long term over 650 F.
or else the strength weakens. Does it glow red at all in the back top
of the stove? thanks
OK I'm finally getting it - you are stating the SMOKE is way cooler than the fire itself. So once the smoke exits outside your ceramic insulation firebox then it's not going to overheat the steel. OK - finally it makes sense to me. haha. Thanks again. Too me awhile -
For the stove top thermometer a cruising stove will run between 500-650deg, an over fire situation could develop if the stove top temps start running into the 700's, damage could occur when stove top temps are in the 800's, remember the fire is hotter in the inside of the stove.
generally stoves that run with a catalytic converter will have lower chimney pipe temps then stove that have air re-burn tubes, that's because the cat stove can burn more efficiently under lower temps (cat lights off) and the epa stove needs higher temps to reburn the unburnt smoke (ie: take more heat to achieve a clean burn, more heat = more heat up the flue)
With cat stoves you don't want the cat prob to run higher then 2,000deg f, premature cat failure can occur when they are exposed to very high stove top temps or direct flame impingement.
So he had a firebox of 1800 F but his secondary burn off was only 700 F - and then exited out of the stove at 500 F.
As the stove reaches 700 OF degrees, close the bypass flue. All em issions are then forced to travel through the combustor on their way to the chimney. As the st ove’s temperature continues to rise, the combustor ignites
more particulates effectively burning these emissions. This sec ondary combustion, as it is called, occurs traditionally at
temperatures 300 OF to 600 O
F degrees lower than in non-catalytic stoves.
https://magnumheat.com/wp-content/uploads/2016/12/CatalyticV72rev15-26-092.pdf
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