Longer burn time, load it up or add over time?

Longer burn time, load it up or add over time?

PostBy: l40knocker On: Wed Feb 18, 2009 5:56 pm

I have a hand fired boiler and was wondering what experience people have with loading their boiler full with coal or putting coal on the fire a few times throughout the day. Which method will give you a better burn as fire as using your coal as efficiently as possible.
Last edited by l40knocker on Thu Feb 19, 2009 4:41 pm, edited 1 time in total.
l40knocker
 
Hand Fed Coal Boiler: Biasi 3 Wood/Co
Coal Size/Type: anthracite nut
Other Heating: oil fired hydro air system
Stove/Furnace Model: 3 Wood/Coal

Re: Loger burn time, load it up or add over time?

PostBy: Cap On: Wed Feb 18, 2009 6:21 pm

I believe the more you add, the hotter the fire will become and more you burn. If I layer 6x over a 24hr period, I can maintain good heat but not overheat the stove. But of course, you chance cooling off if you let this thin layer burn off.

I hear many say, "top it off". It won't burn any hotter. I disagree. My results prove, the greater cubic inches of coal in the box, the hotter the fire. At some point within 2hrs after topping off. the entire box is engulfed. Unless I really cut back on air and simply simmer. My results. Yours may vary.
Cap
 
Hand Fed Coal Boiler: Harman SF 250, domestic hot water loop, heat accumulator

Re: Loger burn time, load it up or add over time?

PostBy: Devil505 On: Wed Feb 18, 2009 6:59 pm

I can only speak to coal stoves but I think the principle would be the same with a boiler: I fill my stove up fully at every shake down PLUS add coal during the day. Except in frigid weather, this allows me to get by with one shake down per day.
Last edited by Devil505 on Thu Feb 19, 2009 10:15 am, edited 1 time in total.
Devil505
 
Stove/Furnace Make: Harman
Stove/Furnace Model: TLC-2000

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Re: Loger burn time, load it up or add over time?

PostBy: lowfog01 On: Wed Feb 18, 2009 7:47 pm

I personally don’t believe there is a difference in the long run. I’m in and out of the house all day long. If I know I’ll be gone for a few hours I load the stove up and get a steady burn at 350* stove top and a room temperature of 85* which lasts for up to 12 hours. If I am around the house I’ll tend the fire a little more closely – adding coal and shaking more often - maintaining a thinner coal bed with a steady burn at 350* stove top and a room temperature of 85*. At the end of the 24 hour period I’ve still only burned 40lbs of coal while maintaining my temperatures. It all boils down to how much effort do I want to put into the stove on any given day? Lisa
lowfog01
 
Hand Fed Coal Stove: Mark II & Mark I
Coal Size/Type: nut/pea

Re: Loger burn time, load it up or add over time?

PostBy: coal berner On: Wed Feb 18, 2009 10:14 pm

Devil505 wrote:I can only speak to coal stoves but I think the principle would be the same with a boiler: I fill my stove up fully at every shake down PLUS add coal during the day. Except in frigid weather, this allows me to get by with one shake down per day.

a stoker stove or boiler does it by itself set it forget
coal berner
 
Stoker Coal Boiler: 1986 Electric Furnace Man 520 DF
Stove/Furnace Make: Electric Furnace Man
Stove/Furnace Model: DF520

Re: Loger burn time, load it up or add over time?

PostBy: oliver power On: Thu Feb 19, 2009 10:14 am

lowfog01 wrote:I personally don’t believe there is a difference in the long run. I’m in and out of the house all day long. If I know I’ll be gone for a few hours I load the stove up and get a steady burn at 350* stove top and a room temperature of 85* which lasts for up to 12 hours. If I am around the house I’ll tend the fire a little more closely – adding coal and shaking more often - maintaining a thinner coal bed with a steady burn at 350* stove top and a room temperature of 85*. At the end of the 24 hour period I’ve still only burned 40lbs of coal while maintaining my temperatures. It all boils down to how much effort do I want to put into the stove on any given day? Lisa
I'm with you Lisa. I don't think it really matters in the long run. I'm guessing at this: My uncle tends his Mark 111 every 12 hours. If he's going to be home during the really cold days, sometimes he'll throw a little coal on, 3 or 4 times during that 12 hours. He claims his fire stays hotter. No matter how he tends his stove, he uses about the same amount of coal year after year. My thinking would be; what's the difference? Run a smaller fire hotter, or a bigger fire lower? BTU's are BTU's, right? Maybe I'm just spoiled by my gravity fed hoppers.
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: Loger burn time, load it up or add over time?

PostBy: Devil505 On: Thu Feb 19, 2009 10:18 am

coal berner wrote:a stoker stove or boiler does it by itself set it forget


l40knocker wrote:I have a hand fired boiler and was wondering.....


He says his boiler is hand fired so wouldn't that work the same as a hand fired stove?.
Devil505
 
Stove/Furnace Make: Harman
Stove/Furnace Model: TLC-2000

Re: Loger burn time, load it up or add over time?

PostBy: CapeCoaler On: Thu Feb 19, 2009 10:49 am

Which method will give you a better burn as fire as using your coal as efficiently as possible.

I think key words are better burn.
Loading coal more often and in smaller amounts would offer a more even burn.
Loading a large amount of coal at once would lower temps for a while.
This is a boiler so water temps might go down while there was a demand for heat so...
A better burn would be achieved by loading more often...
CapeCoaler
 
Stoker Coal Boiler: want AA130
Hand Fed Coal Stove: DS Machine BS#4, Harman MKII, Hitzer 503,...
Coal Size/Type: Pea/Nut/Stove

Re: Loger burn time, load it up or add over time?

PostBy: l40knocker On: Thu Feb 19, 2009 4:28 pm

Thanks for all of the great input!! I seem to feel like the boiler uses the same amount of coal whether I tend more often or just 2 times a day. The water temp does go down when you first shake it and load it back up. What seems to work for me is to put some fresh coal on the fire about an hour before I shake it down and then the fire stays fresh when I load it back up with coal. I am happy to say that I have gotten down to shaking 2 times and loading 2-3 times in a 24 hr period. A far cry from when I was burning wood!!
l40knocker
 
Hand Fed Coal Boiler: Biasi 3 Wood/Co
Coal Size/Type: anthracite nut
Other Heating: oil fired hydro air system
Stove/Furnace Model: 3 Wood/Coal

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