How to know if I'm getting 100,000 BTU's from my stove?

Re: How to know if I'm getting 100,000 BTU's from my stove?

PostBy: 63roundbadge On: Thu Nov 22, 2012 3:03 pm

SteveZee wrote:Nice set up by the way and a happy Thanksgiving to you and yours.


Thanks. I tried to wring out efficiency while keeping it aesthetically understated. Love this coal, you can bastardize the stove without worrying about chimney fires!
63roundbadge
 
Stove/Furnace Make: Alaska
Stove/Furnace Model: Kodiak

Re: How to know if I'm getting 100,000 BTU's from my stove?

PostBy: Cap On: Thu Nov 22, 2012 4:28 pm

From what I can tell based on my experience with temp readings on my hand fired Harman, your best efficiency would be a simmer resulting in a stack temps at or about 150f. But no way would this be near max stove output. I measure my output heat differently than anyone here. I measure temp of hot air in a pleteum, not side or top of stove. Typically I see, 150/150 when I am not trying to produce lots heat. I have lots of pictures posted on old threads if interested in seeing.
Cap
 
Hand Fed Coal Boiler: Harman SF 250, domestic hot water loop, heat accumulator

Re: How to know if I'm getting 100,000 BTU's from my stove?

PostBy: lsayre On: Thu Nov 22, 2012 6:35 pm

If I might ask, how many inches up from ground level is the center line of the flue outlet on the back of the Alaska Kodiak, and is that a 6" flue pipe?
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (It has been fixed!)

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Re: How to know if I'm getting 100,000 BTU's from my stove?

PostBy: Poconoeagle On: Thu Nov 22, 2012 7:39 pm

26" give or take. yes 6" dia
Poconoeagle
 
Stove/Furnace Make: Buckwalter & Co. , EFM520
Stove/Furnace Model: No. 28 Glenwood 1880, Alaska

Re: How to know if I'm getting 100,000 BTU's from my stove?

PostBy: 63roundbadge On: Thu Nov 22, 2012 7:45 pm

lsayre wrote:If I might ask, how many inches up from ground level is the center line of the flue outlet on the back of the Alaska Kodiak, and is that a 6" flue pipe?


25" floor to center of flue exit, 6" diameter.

Yup-give or take... courtesy of Yuengling today.
63roundbadge
 
Stove/Furnace Make: Alaska
Stove/Furnace Model: Kodiak

Re: How to know if I'm getting 100,000 BTU's from my stove?

PostBy: lsayre On: Thu Nov 22, 2012 10:41 pm

Thanks Poconoeagle and 63roundbadge.

63roundbadge, see if you can find a few pails of nut to try out in the Kodiak, and see if that doesn't raise your stoves surface temperature on the order of 200 degrees.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (It has been fixed!)

Re: How to know if I'm getting 100,000 BTU's from my stove?

PostBy: SteveZee On: Fri Nov 23, 2012 1:03 pm

63roundbadge wrote:
SteveZee wrote:You are burning bit coal? I only ask because of the creosote mention. Maybe you burn some wood at times?

In all honesty I would say Larrys "equation " is about as good as any for a general idea of the btu's. For me it's just a number to compare stove sizes too in particular for hand feds. I always look at how many pounds does the stove hold in a full load and then how hot it gets versus the stack temps in my situation. I find it interesting that at "full throttle"you only get 350/150. That's good stove to stack numbers but if I opened my primaries all the way I think I could get 700/175 numbers on a cold day. I don't run it that high, I like to stay about 550r so max and normally just cruise at 350-400 during the winter but that is with the primaries maybe a 1/2" or so open. Maybe it's the heat sinks you have attached to yours?


I'm burning purely Blaschak pea anthracite. Never wood/bituminous. Very predictable and stable.

I think tonight I'm going to shovel a light layer on top of the hopper fed level to see if it brings it up a bit? With the angle of the fire-brick that would give a larger surface area of red coal. If that's the case, since the hopper is slightly tapered inward, a shorter hopper would achieve the same effect making a larger firebox? I think I'll leave well enough alone there. No turning back on that one...


Ok well the pea coal exclusively explains the relatively low (300-350) stove body temps at full throttle. As I mentioned my Glenwood runs that with the primaries only cracked open may a 1/2". At full open, it would be 600-700 on the stove body with maybe 175/200 stack temps. The differance is I burn stove coal or a mix of stove/nut size coal. It allows more air through the bed due to the larger sized pieces.
SteveZee
 
Hand Fed Coal Stove: Glenwood Modern Oak 116 & Glenwood 208 C Range

Re: How to know if I'm getting 100,000 BTU's from my stove?

PostBy: 63roundbadge On: Fri Nov 23, 2012 5:24 pm

Thanks to all! I'm gonna look for some nut, and mix it. If that works, I know I can get a mixture of that next year from my guy.

I appreciate all of the information!

John
63roundbadge
 
Stove/Furnace Make: Alaska
Stove/Furnace Model: Kodiak

Re: How to know if I'm getting 100,000 BTU's from my stove?

PostBy: lsayre On: Fri Nov 23, 2012 5:36 pm

I think that many begin and end the season with pea, blend it when the weather is just turning cold and when it is exiting the cold, and go with straight nut when it is really cold.

I could see where the monthly breakdown might go something like this:

exclusively pea: October, April, early May
blend of 50% pea and 50% nut : November, March
exclusively nut: December, January, February
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (It has been fixed!)

Visit Hitzer Stoves