Need internal length and width dimensions for your firebox

Re: Need internal length and width dimensions for your firebox

PostBy: ddahlgren On: Sat Jan 04, 2014 1:10 pm

Sunny Boy wrote:FWIW, just to compare for grins.

Those 160K BTU ranges are about what a very large oil burner would do. My Oneida oil furnace is rated 250K BTU output with a nozzle rated at 3 gallons an hour and the fan speed up to max. I have a 1.5 gallon nozzle in it and the fan at half speed. That's enough to keep this 4000 square feet of drafty 17 room Victorian heated down into below zero range.

I have my own equipment to do my own tune-ups. It CO2 tests out at about 80% efficient. Because I have extra storage to get best cash price in bulk and have to keep track of when to order, I have about 15 years of measuring and tracking daily oil consumption too. For the coldest months, January and Feb, it averages 20 gallons a day. When it's below zero, it uses about 22-24 gallons a day.

So that should give some info for how well the big coal stoves compare.

Paul


Are you burning 220 lbs. of coal a day? That would be an equivalent fuel input.
ddahlgren
 
Hand Fed Coal Stove: Crane 404

Re: Need internal length and width dimensions for your firebox

PostBy: Lightning On: Sat Jan 04, 2014 1:29 pm

It was intended to be a wood and coal combo appliance. It was rated 119,000 btu. I don't think they specified for which fuel. Thanks for your calculations :D
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Need internal length and width dimensions for your firebox

PostBy: Lightning On: Sat Jan 04, 2014 1:43 pm

So even on these cold days at 75 pounds I'm turning around 30,000 per hour which is only a quarter what the manufacture says it's rated. I figured 75% heat transfer efficiency into that. I'm not pushing it very hard I guess lol.

Larry, does your calculation include heat transfer efficiency?
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

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Re: Need internal length and width dimensions for your firebox

PostBy: ddahlgren On: Sat Jan 04, 2014 1:58 pm

That is a whole buinch of wood you would have to be loading every hour. Do you know how many sq. ft. the stove is and does it have a blower?
ddahlgren
 
Hand Fed Coal Stove: Crane 404

Re: Need internal length and width dimensions for your firebox

PostBy: lsayre On: Sat Jan 04, 2014 2:06 pm

Lightning wrote:It was intended to be a wood and coal combo appliance. It was rated 119,000 btu. I don't think they specified for which fuel. Thanks for your calculations :D


If the 12" dimension is used you get 126,000 BTU's from the formula.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (It has been fixed!)

Re: Need internal length and width dimensions for your firebox

PostBy: lsayre On: Sat Jan 04, 2014 2:08 pm

Lightning wrote:Larry, does your calculation include heat transfer efficiency?


My calculation doesn't include anything but square inches. Seems to work in many cases though. Others are always encouraging me to keep it simple, that is, until I actually keep it simple. ;)
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (It has been fixed!)

Re: Need internal length and width dimensions for your firebox

PostBy: Lightning On: Sat Jan 04, 2014 2:13 pm

Reason I ask is because if you factor 75% into the first calculation it's probably close to what the manufacturer said :D
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Need internal length and width dimensions for your firebox

PostBy: lsayre On: Sat Jan 04, 2014 2:38 pm

Lightning wrote:Reason I ask is because if you factor 75% into the first calculation it's probably close to what the manufacturer said :D


Nearly all ratings that I'm aware of for heating appliances are gross input ratings. That leads me to believe that the 12" wide base of the trapezoidal firebox sets the limit for the gross input BTU potential of the stove.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (It has been fixed!)

Re: Need internal length and width dimensions for your firebox

PostBy: KingCoal On: Sat Jan 04, 2014 8:01 pm

Larry, at 14 x 16 the DSM 1400 is rated at 80,000. the formula shows 84,000.

Lightning, 75 #'s a day ?!?

i'm running 45#'s a day at a constant 500* stove top, house is balmy to say the least.

we are about to get up to 12" of snow followed by 3 days not above 0* F and wind chills to -20* and under. i'll let you know how the use changes.
KingCoal
 
Hand Fed Coal Stove: Riteway # 37, Comforter Stove Works
Baseburners & Antiques: 2014 DTS C17 Base Burner
Coal Size/Type: Nut Anth.
Other Heating: none

Re: Need internal length and width dimensions for your firebox

PostBy: Lightning On: Sat Jan 04, 2014 8:05 pm

KingCoal wrote:Lightning, 75 #'s a day ?!?


I've had a couple 80 pound days.. Just during extreme cold days, below zero at night and 0-5 degrees during the day. My consumption averages out at 55 pounds per day overall.. During late fall and early spring I get by with 30-40 pounds per day, less on the real warm days if I'm just idling thru..
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Need internal length and width dimensions for your firebox

PostBy: imaddicted2u On: Mon Jan 06, 2014 7:46 pm

My 1957 American Standard Severn, firebox is 18" X 21" = 141,750 btu. I don't know the rated capacity.
Does the formula apply only to coal or can it be applied to wood?
imaddicted2u
 
Hand Fed Coal Boiler: American Standard Severn (1957) on bituminous
Coal Size/Type: Unscreened-Fist sized lump to powder-Bituminous

Re: Need internal length and width dimensions for your firebox

PostBy: KingCoal On: Mon Jan 06, 2014 8:24 pm

Lightning wrote:
KingCoal wrote:Lightning, 75 #'s a day ?!?


I've had a couple 80 pound days.. Just during extreme cold days, below zero at night and 0-5 degrees during the day. My consumption averages out at 55 pounds per day overall.. During late fall and early spring I get by with 30-40 pounds per day, less on the real warm days if I'm just idling thru..


just passing the 24 hr. mark at -35F . during that time i've had the DSM 1400 running at 525* and used 60#'s of nut to keep the house 66* i'm good with that.

we're going into the -40 / -50 range tonight and tomorrow, i expect it to be about the same.
KingCoal
 
Hand Fed Coal Stove: Riteway # 37, Comforter Stove Works
Baseburners & Antiques: 2014 DTS C17 Base Burner
Coal Size/Type: Nut Anth.
Other Heating: none

Re: Need internal length and width dimensions for your firebox

PostBy: Lightning On: Mon Jan 06, 2014 8:34 pm

KingCoal wrote:keep the house 66* i'm good with that.
Awww... :( My woman complains if it sinks under 73... I gotta burn a few extra to maintain it especially in times like these!! :lol: But that's ok with me.. If it was propain we would all be bundled up with drippin noses and cold hands at 58 degrees in the house with 0 outside!! OK maybe not 58 but not much warmer either! :lol:
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Need internal length and width dimensions for your firebox

PostBy: SMITTY On: Mon Jan 06, 2014 8:43 pm

Been meaning to post this for a while now ...

Harman Mark lII:

20-5/8" x 13-7/8" x 9-1/4" in the back. In the front it's 4-7/8" deep ... but since you can heap the coal up in the middle, maybe that shorter measurement can be canceled out ... :gee: :confused: :?:
SMITTY
 
Stoker Coal Boiler: Patriot Coal - custom built by Jim Dorsey
Hand Fed Coal Stove: Harman Mark III (not currently in use)
Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler

Re: Need internal length and width dimensions for your firebox

PostBy: lsayre On: Mon Jan 06, 2014 10:10 pm

imaddicted2u wrote:My 1957 American Standard Severn, firebox is 18" X 21" = 141,750 btu. I don't know the rated capacity.
Does the formula apply only to coal or can it be applied to wood?


Only to coal. Possibly only to anthracite. ???
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (It has been fixed!)

Visit Hitzer Stoves