keystoker ka-6 efficiency

keystoker ka-6 efficiency

PostBy: danwesson623 On: Fri Jan 31, 2014 11:52 pm

Is it more efficient to have the pusher set to feed more coal and produce the more BTU's and heat the boiler faster or feed less coal and heat slower?
danwesson623
 
Stoker Coal Boiler: Keystoker ka-6

Re: keystoker ka-6 efficiency

PostBy: 2001Sierra On: Sat Feb 01, 2014 12:07 am

If the ash is the same then it does not matter. Also stack temperature does come into play. I like low and slow, but that is my opinion and you know they are like a$$holes everyone has one :P
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: keystoker ka-6 efficiency

PostBy: KLook On: Sat Feb 01, 2014 12:17 am

I am a proponent of the law of physics that states that the greater the temperature differential the greater the transfer rate. So, running a hot fire for shorter periods should be the most efficient. I want mine up to max temp as soon as possible.

Kevin
KLook
 
Stoker Coal Boiler: Harman VF 3000
Coal Size/Type: rice, bagged, Blaschak
Stove/Furnace Make: Harman (Back In Maine)
Stove/Furnace Model: VF 3000

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Re: keystoker ka-6 efficiency

PostBy: danwesson623 On: Sat Feb 01, 2014 12:34 am

I think you are right. I have been trying to cut back on the coal feed to save coal but I am beginning to think the hotter the fire the better
danwesson623
 
Stoker Coal Boiler: Keystoker ka-6

Re: keystoker ka-6 efficiency

PostBy: KLook On: Sat Feb 01, 2014 12:53 am

Not sure where you are located but the guys in the more temperate areas(not so cold) can get away with things that others cannot. When it is cold, make heat. That is the only thing that works. I agree that pumping only enough heat to satisfy the demand for longer periods is better for comfort(shorter swings in temp from high to low) but to make the heat needed, getter done. Much is discussed about having oversized boilers that idle to much, and much is discussed about having undersized boilers that run to hard.


Kevin
KLook
 
Stoker Coal Boiler: Harman VF 3000
Coal Size/Type: rice, bagged, Blaschak
Stove/Furnace Make: Harman (Back In Maine)
Stove/Furnace Model: VF 3000

Re: keystoker ka-6 efficiency

PostBy: Pacowy On: Sat Feb 01, 2014 2:02 am

If you have a hot water system my vote would be to run low and slow so the combustion gases are moving their slowest over the heat exchange surfaces. If you have a steam system my vote would be to run hard so the system spends the smallest possible amount of time making steam and the most possible time at rest.

Mike
Pacowy
 
Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite

Re: keystoker ka-6 efficiency

PostBy: oliver power On: Sat Feb 01, 2014 8:27 am

KLook wrote:Not sure where you are located but the guys in the more temperate areas(not so cold) can get away with things that others cannot. When it is cold, make heat. That is the only thing that works. I agree that pumping only enough heat to satisfy the demand for longer periods is better for comfort(shorter swings in temp from high to low) but to make the heat needed, getter done. Much is discussed about having oversized boilers that idle to much, and much is discussed about having undersized boilers that run to hard.


Kevin
I don't know as if it matters but, I'm with KLook. If demand is big, and you are going to need heat, you had better be making heat. Get ready for the next call from thermostat. If outside temps are higher, and the boiler doesn't need to be cranking, it will idle back anyways. Then the long slow idle fire will continue to build / store heat. And that's my opinion.
oliver power
 
Stoker Coal Boiler: KEYSTOKER Kaa-2
Hand Fed Coal Stove: Hitzer 50-93 & 30-95, Vigilant (pre-Vigilant-II)
Baseburners & Antiques: MANY (Mostly when burning wood)
Stove/Furnace Make: HITZER / KEYSTOKER
Stove/Furnace Model: 50-93 & 30-95 , Kaa-2

Re: keystoker ka-6 efficiency

PostBy: Carbon12 On: Sat Feb 01, 2014 9:41 am

I adjust my feed rate to provide just enough burn to satisfy the current load. If it's "warmer" outside, I back the feed rate down a little. If it's friggin' cold out, I set the feed rate to give 1 inch of dead ash on the grate. HOWEVER,....I seem to burn about the same amount of coal on a per degree day basis regardless of feed rate so I'm not sure adjusting the feed rate really accomplishes anything meaningful. I have noticed that coal consumption is not entirely linear. On warmer days I burn about 2 pounds per degree day. On colder days it's 2.5 pounds per degree day. This may have to do with the heat loss with greater differential between indoor and outdoor temperatures.
Carbon12
 
Stoker Coal Boiler: Keystoker KA-6
Coal Size/Type: Rice/Anthracite
Other Heating: Heat Pump/Forced Hot Air Oil Furnace

Re: keystoker ka-6 efficiency

PostBy: Wiz On: Sat Feb 01, 2014 9:54 am

I spent countless time on the same question asked. I've got answers comparing apples to apples ( Ka-6). Running boiler with the aggressive burn leaving 2 inch of dead ash during run time will be the BEST performance for ka6. Boiler will always be ready for any demand it calls for, set it leave it period. doing this is less unburnt. others will argue this point.
Wiz
 
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(

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