Got my High Emisivity Coating on (Pics)

[Corey]

Let's say it achieves a 5% improvement in efficiency. How will you be quantifying the difference? Do you have the stove instrumented?

One interesting test would be to take a piece of material...firebrick, steel, or whatever - coat a section with this high E coating and coat a section right next to that with flat black spray paint. Let everything equalize for a good amount of time, then read both coatings with an IR temp gun.

Flat black spray paint generally has an emissivity around 0.95. If this stuff is higher than that, it would actually read warmer on the IR gun.

 

[Todd]

Have you flue temps gone up? I wonder if your just going to send more heat up the stack?

 

[begreen]

That is what I would be curious about too Todd and why I asked how an improvement would be quantified. I would take several measurements in advance over several fires with a specific weight of wood, then coat the bricks and repeat the same tests. Average the results of before and of after and compare.

 

[precaud]

Glad to see you experimenting, dog. If your experience is anything like mine in the past, you'll take more heat from forum members than you'll get from the modification!!

(sorry, I couldn't resist...)

 

[Todd]

Maybe this will just increase your combustion efficiency but not the overall heat output efficiency? Still kind a interesting to see what you come up with.

 

[HotCoals]

Of course the drier the wood the faster the out gassing.

If your goal is to achieve a longer secondary burn you might be on to something..that is if you can keep the coal bed down in size to slow the out gassing but yet hot enough in the box to facilitate secondary's.
Bake the wood so to speak?

 

[EatenByLimestone]

Does this stuff reflect heat or slow it's absorbtion? If it reflects heat it might be more useful. Imagine a sheet metal hearth pad that could be laid flat down over a wood floor. Given the way that metal can be stamped you could have an infinite number of ways that your hearth could be decorated and it would only be 1/16" thick. In the off season a rocking chair could sit by the stove without any issues.

Matt

 

[Huntindog1]

Todd,

Too many varibles to say if the flue temps went up ( I did take note that the stove top temp difference to flue temp 16" up was that flue was 200 deg less), I operated this stove all last winter, too me these changes of the 1/4" ceramic insulation behind my fire brick and the ceramic coating on the fire bricks in my experience has led to a stove thats easier operational wise. Its just seems like the stove is easier to operate. Like easier to get the temps up, Easier to ease the air down on it with out killing the flames, seems to operate at a lower air setting. The stove seems less temperamental. These are just my observations not any scientific data or anything. I view these changes as not drastic but more like tweaks of the system. There is still heat that comes out the sides and back of the stove, it doesnt stop it all.

How much does putting side shields on a stove reduce the heat getting out the sides of a stove as my stove doesnt have side shields?

I would like to try the other coatings (Super Therm or Emisshield) instead of the more available ITC-100.

My glass has been getting dirty on me more than usual. Maybe cause I am able to run the stove at lower settings or the wood is not as good as I am burning junk stuff during shoulder season. If the wood is the problem with the glass getting dirty then I would say the stove is improved as its burning really good if its the wood.

Lastly my thoughts of the heat going up the flue is if I can operate my stove at a lower setting then how fast the heat flushes up the flue is air flow thru the stove , like when the door is open so much air flow all your heat gets flush up the flue. With increased heat in the fire box and neing able to lower the air input to a new low I effectively slowed the air flow thru the box even more and the heat has residual time in which to radiate out the fron and top of the stove as thats where most of the heat is radiated anyways as these fireboxes are already insulated somewhat with the fire bricks and baffle plates. I wonder how mcuh the worry about less readiated heat in stove with Pumice insulating bricks, I dont think it too big a deal.

Another thought is radiating heat is a function of temperature difference, so by having a hotter fire box by the fire box being more insulated, the radiating heat loss issue should be somewhat offset by the increase in fire box temps and thus the temperature difference is greater thus you have more heat radiated and slower air flow thru the stove. Just a thought.

 

[Huntindog1]

Tonight with stove shut all the way down low as she would go, I had secondaries at a stove top temp around 300 thought that was good, pipe temp was about 200. Here is a small video clip of it.

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