Hi guys i have a Harman Magnum Stoker I bought new back in 2008. So Far no problems yet besides a new set of grates and piece of glass for door.My question is how many pounds of coal will it burn in 1 hour at maxium feed Does anyone know? Answer would be Appreciated.
Thanks Gamesniper
Harmon Magnum Usage
- StokerDon
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- Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood
Welcome to the forum,
If I remember correctly, the Mag Stoker puts out 85,000 BTU. Divide the 85,000 BTU by roughly 12,000 BTU coal and you get 7.083 pounds per hour of coal feed. This is a rough figure but should be close.
-Don
If I remember correctly, the Mag Stoker puts out 85,000 BTU. Divide the 85,000 BTU by roughly 12,000 BTU coal and you get 7.083 pounds per hour of coal feed. This is a rough figure but should be close.
-Don
- McGiever
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2008...is that a SUPER Magnum??
If it is a SUPER, then you can get 105,000 BTU/hr. max. output.
If it is a SUPER, then you can get 105,000 BTU/hr. max. output.
- Lightning
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If 85000 is output BTUs then with a factor of 10,000 BTUs per pound (efficiency) it would be closer to 8.5 pounds per hour. Would be my guess. Not trying to split hairs though
I use 10000 BTUs per pound for most calcs to factor in efficiency which is probably a bit optimistic lol.
- StokerDon
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- Joined: Mon. Nov. 11, 2013 11:17 am
- Location: PA, Southern York County!
- Stoker Coal Boiler: Gentleman Janitor GJ-5, Van Wert VA-600, Axeman Anderson130 X3.
- Hand Fed Coal Furnace: Harman SF3500 reduced down to 3 grates connected to its own plenum
- Coal Size/Type: Rice, Chestnut and whatever will fit through the door on the Harman
- Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood
It's not a boiler so it's over 12,000 BTU per pound. I was being conservative calling it 12,000 even.
-Don
-Don
- Lightning
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- Stoker Coal Boiler: Modified AA 130
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It wouldn't matter if it's a boiler, furnace, or stove.. Output BTUs will be a percentage less than input BTUs because of efficiency, 80% (10000 BTUs/pound of usable heat) is being generous..
Where is Isayer? lol
- StokerDon
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- Joined: Mon. Nov. 11, 2013 11:17 am
- Location: PA, Southern York County!
- Stoker Coal Boiler: Gentleman Janitor GJ-5, Van Wert VA-600, Axeman Anderson130 X3.
- Hand Fed Coal Furnace: Harman SF3500 reduced down to 3 grates connected to its own plenum
- Coal Size/Type: Rice, Chestnut and whatever will fit through the door on the Harman
- Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood
I don't know where you got that from but I've never heard it before. With a boiler you figure it like this;
12,250 X Pounds per hour minus 10% for bone, rock, shale in the coal. Minus the boiler efficiency (80% to 90%) = output BTUH. That is the standard.
I know there is one for hot air furnaces too but I don't know what it is. It has something to do with coal vs. bonnet temperature. There has never been a standard for stoves that I know of.
-Don
- Lightning
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Like you said, 10% for ash and another 10% is losses with combustion efficiency and heat going up the stack. This is very optimistic though. You translated his input pounds by using the output of 85000 BTUs at nearly 100% efficiency by using 12000 BTU per pound. My using 10,000 BTUs per pound factors in some of those losses that you described and is just a different path around the same hill.. That's all, no biggie, carry on
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Hi guys thanks for replies.My stoker stove is the magnum the old style not the new style they sell today. I was just curious on coal usage they figure on burning max feed for 1 hour