Alaska Kodiak hand fired, low end coal consumption question

Alaska Kodiak hand fired, low end coal consumption question

PostBy: lsayre On: Sat Aug 24, 2013 11:37 am

On the Alaska website it states that their Kodiak hand fired stove can be throttled down to only 15,000 BTU's per hour. By my calculation, it takes roughly 42 lbs. of coal burned in 24 hours to be roughly the equivalent of 15,000 output BTU's per hour. Could it be that they are referring to input BTU's, in which case it could be throttled back to consume only about 27 lbs. of coal per day at the lowest possible burn setting? Bottom line is: How little coal can you burn daily in a Kodiak and still maintain a fire?
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: freetown fred On: Sat Aug 24, 2013 11:47 am

Don't know about the KODIAK--but my HITZER 50-93--I'm burning 20 lbs or less in a 24 hr period on the cuff seasons
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: lsayre On: Sat Aug 24, 2013 11:50 am

freetown fred wrote:Don't know about the KODIAK--but my HITZER 50-93--I'm burning 20 lbs or less in a 24 hr period on the cuff seasons


Thanks Fred. Both of these stoves have similar capacities and identical high end output ratings, so that info "may" be close for the Kodiak at the low end.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

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Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: lsayre On: Sat Aug 24, 2013 12:09 pm

Lets throw a DS-1500 into the mix here as well. How little coal can one of those burn in 24 hours and still keep going?
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: Vinmaker On: Tue Aug 27, 2013 10:26 am

lsayre wrote:On the Alaska website it states that their Kodiak hand fired stove can be throttled down to only 15,000 BTU's per hour. By my calculation, it takes roughly 42 lbs. of coal burned in 24 hours to be roughly the equivalent of 15,000 output BTU's per hour. Could it be that they are referring to input BTU's, in which case it could be throttled back to consume only about 27 lbs. of coal per day at the lowest possible burn setting? Bottom line is: How little coal can you burn daily in a Kodiak and still maintain a fire?



Wow. Is that the math? 42lbs/ day of coal to make 15K btu/hour? I guess I always felt like it was putting out more than 15K btu when I stick in 20lbs in the morning. Is that all it does on an hourly basis? Amazing. So how does one achieve those max numbers of say 80-100K btu? They do not hold 80-100lbs of coal.

Am I missing something?

Vin.
Vinmaker
 
Stove/Furnace Make: HARMAN
Stove/Furnace Model: SF-250

Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: lsayre On: Tue Aug 27, 2013 12:57 pm

About 250 lbs. of coal burned per day would give you the maximum rated output.

250lbs./day x 13,250 BTU's/Lb. x 0.72 (efficiency) / 24 hours/day = ~100,000 BTU's per hour.

I don't think you are missing anything. Most homes need far fewer input/output BTU's in general than their present heating appliances are rated for.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: lsayre On: Wed Aug 28, 2013 8:54 pm

I just had a crazy thought. If a 100,000 BTU rated hand fired stove was eating 10+ lbs. of coal per hour and actually firing at it’s full rated 100,000 BTU's, what would its surface temperature be?
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: 2001Sierra On: Wed Aug 28, 2013 9:20 pm

I am guessing 20 lbs a day. My 90,000 btu stoker barely uses 50 lbs a day in the dead of winter, heating 2200 sq ft of 60's house with upgrades.
2001Sierra
 
Hot Air Coal Stoker Stove: Keystoker 90 Chimney vent
Coal Size/Type: Rice
Other Heating: Buderus Oil Boiler 3115-34
Stove/Furnace Model: Keystoker 90 Chimney Vent

Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: dcrane On: Thu Aug 29, 2013 6:46 am

lsayre wrote:I just had a crazy thought. If a 100,000 BTU rated hand fired stove was eating 10+ lbs. of coal per hour and actually firing at it’s full rated 100,000 BTU's, what would its surface temperature be?


a lot more than the 600 degree temps they recommend :lol: U/L has to have some eye on the rating vs how blazing hot the stove has to get to achieve this, lets face it... most of us probably exceed the surface temps recommended, on some stoves this is not a big deal at all, on other stoves its a "stove killer" to do it (VC and some others with their silly lil iron grates in the front that warp and twist like pretzels or have glued & screwed cast iron tops and pieces over the firebed that would expand and contract to a point of harming the integrity of the unit have problems, while some others with 1/4" solid welded steel stoves have no problem with steady surface temps of 900+). Either way to burn up that amount of coal lets assume the surface temps have to reach well over 600
dcrane
 
Hand Fed Coal Stove: Crane 404

Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: ridgeracing On: Thu Sep 05, 2013 8:44 pm

With my DS1600WH throttled back to 250deg. stove temp, I have gone 24hrs on 20-25lbs. At deep winter time I burn 50lbs in 24hrs at 500-550 stove temp, its supposed to be a 110000btu at that setting.
ridgeracing
 
Hand Fed Coal Stove: DS Machine Stove
Stove/Furnace Make: D.S Machine
Stove/Furnace Model: DS1600WH

Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: lsayre On: Thu Sep 05, 2013 9:06 pm

I'm becoming convinced that the ratings for coal stoves must mean input BTU's. And since a hand fired stove is about 60% efficient, a 100,000 BTU rated stove would only have a maximum output of 60,000 BTU's per hour. Even at that it would need to burn at least 7.6 lbs. of coal per hour. That's about 182 pounds per day.

7.6 x 13,200 x 0.6 = 60,192 BTU's
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: Rob R. On: Thu Sep 05, 2013 10:06 pm

Are you any closer to ordering a stove?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice/buck
Other Heating: Dad's 1953 EFM Highboy

Re: Alaska Kodiak hand fired, low end coal consumption question

PostBy: lsayre On: Fri Sep 06, 2013 6:08 am

Rob R. wrote:Are you any closer to ordering a stove?


Next step is getting out to actually see them. Only problem is that aside from DS Machine and Hitzer my minimum travel is 75 to 100 miles to see any alternatives like Alaska and Keystoker.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (if I ever get it fixed)

Visit Hitzer Stoves