Need internal length and width dimensions for your firebox

Re: Need internal length and width dimensions for your firebox

PostBy: lsayre On: Wed Jan 22, 2014 8:24 pm

I'm On Fire wrote:
lsayre wrote:
Based on 16 x 20 x 375 that would be 120,000 BTU's

But based on 16 x 20 x 140 that would be a max safe 44,800 BTU's per hour of output, or about an input max of 118 lbs. of coal per day. Have you ever hit or exceeded 118 lbs. burned in a single day?


The most I've burned in a single day was maybe 80 pounds. So no, I've never burned through 118 pounds of coal.


Sounds like you've got some reserve capacity there for if/when the really serious cold weather hits! What are your stove temps when you're burning 80 lbs. a day?
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: I'm On Fire On: Thu Jan 23, 2014 12:45 pm

lsayre wrote:Sounds like you've got some reserve capacity there for if/when the really serious cold weather hits! What are your stove temps when you're burning 80 lbs. a day?

They creep up around 560 - 580. I think this winter so far I've had the dial turned all the way up to 5 once. I usually leave it at 4.5 in temps like we're having and the house stays around 75. I only turn it up to 5 if it's going to drop below 0 and be windy. Otherwise I don't mess with it. Even at 5 it's only using one hod in the morning and one at night and I figure each hod full is 35 pounds. But then again, my math sucks so I could be way off too. :D
I'm On Fire
 
Hand Fed Coal Stove: DS Machines DS-1600 Hot Air Circulator

Re: Need internal length and width dimensions for your firebox

PostBy: lsayre On: Fri Jan 24, 2014 7:24 pm

I called Keystoker today and they ran out and measured their HFH-90 for me. Its firebox measures 18.25" x 11" inside the firebricks per their feedback to my inquiry.

By my reckoning that puts it at 18.25" x 11" x 375 = 75,280 input BTU's (American Style). This would be ~37,640 input BTU's European style.

And using the quickie firebox size x 140 method I get 18.25" x 11" x 140 = 28,105 BTU's per hour of safe max output, with this level of output requiring a coal feed/burn rate of about 74 lbs. per day at an assumed efficiency of 75%.

This puts it in the same size/BTU's class as the Glenwood #6, with virtually identical input/output figures.
lsayre
 
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Anthracite Pea
Other Heating: Resistance Boiler (It has been fixed!)

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Re: Need internal length and width dimensions for your firebox

PostBy: lsayre On: Sat Jan 25, 2014 4:13 pm

Has anyone measured the firebox of their 50-93 yet (inside the firebrick to inside the firebrick, wall to wall)? Or will I have to wait until spring for FF to take up this task?
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 25, 2014 5:53 pm

lsayre wrote:I called Keystoker today and they ran out and measured their HFH-90 for me. Its firebox measures 18.25" x 11" inside the firebricks per their feedback to my inquiry.

By my reckoning that puts it at 18.25" x 11" x 375 = 75,280 input BTU's (American Style). This would be ~37,640 input BTU's European style.

And using the quickie firebox size x 140 method I get 18.25" x 11" x 140 = 28,105 BTU's per hour of safe max output, with this level of output requiring a coal feed/burn rate of about 74 lbs. per day at an assumed efficiency of 75%.

This puts it in the same size/BTU's class as the Glenwood #6, with virtually identical input/output figures.


very interesting #'s on that HFH-90. seems to be very slightly lower than my DSM 1400 although i think it might perform some what better in actual use. remember i still haven't run higher than 30,375 BTU output ( 2.5 #'s p.h. ) even during 72 hrs. of -35 wind chill.

that said, i'm not as confident in the comparison with the #6. i think the #6 would hold my house at the same temp. in the same conditions at nothing more than 2 #'s p.h.
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: lsayre On: Sun Feb 02, 2014 2:34 pm

Can anyone confirm to me that the Alaska Kodiak hand fired (despite having round grates) has a 13" x 13" square firebox as measured from the inside of the firebricks?

If this measurement is accurate, then by my simple and purely empirical method of equating one stove to another its potential BTU's compute as follows:

13 x 13 x 375 = 63,375 maximum gross input BTU's/Hr.

Then by taking half of that rating, and also by assuming anthracite at 12,150 BTU's/Lb. on an "as received" basis, I calculate 2.61 lbs. per hour of coal consumption to be a potential safe max burn rate, which extends to about 63 lbs. per day of anthracite coal consumption for the coldest few days of the year.

And assuming 75% efficiency, it should deliver 23,765 safe output BTU's per hour.

Does a high end burn rate of 63 lbs. per day seem about right for this 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: ddahlgren On: Mon Feb 03, 2014 1:14 am

I think the grate estimate has to take into account the surface area of the stove to make sure the stove will operate at some reasonable temperature.
ddahlgren
 
Hand Fed Coal Stove: Crane 404

Re: Need internal length and width dimensions for your firebox

PostBy: McGiever On: Mon Feb 03, 2014 9:04 am

This is all entertaining/amusing but factors nothing in regards to what percentage of burned fuel goes to warm the space vs goes up the stack. Besides obvious vast differences in designs there are variables in different qualities of installs and owner's operational abilities.
Although useful for bragging, "Mines holds more coal than yours", it is very far from an Apples to Apples Comparision between any 2 stoves.
YMMV :roll:

lsayre wrote:Adding in some data computed via this method (some from within a different thread asking much the same thing) to consolidate it all in one location:

Hitzer 983 insert = 161,250 BTU's
DS Machine model 1627 = 162,000 BTU's
Glenwood 208 cook stove = 39,375 BTU's (corrected to 7" x 15" firebox dimensions)
Crane 404 = 50,625 BTU's
Crawford #40 = 42,400 BTU's
Glenwood #6 = 75,400 BTU's
Glenwood #8 = 95,400 BTU's
Many old stoves with 111 in their name = 35,600 BTU's
Many old stoves with 114 in their name = 57,700 BTU's
Many old stoves with 116 in their name = 75,400 BTU's
Many old stoves with 118 in their name = 95,400 BTU's
Harman Mark III = 107,300 BTU's
DS Machine model DS-1400 = 84,000 BTU's
Harman SF260 = 132,000 BTU's
American Standard Severn = 141,750 BTU's
Clayton 1537G = 126,000 to 152,250 BTU's
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: Need internal length and width dimensions for your firebox

PostBy: Davian On: Mon Feb 03, 2014 10:09 am

Stupid question but couldn't you just calculate BTUs by keeping track of how much coal you are burning from day to day (especially if you used bags)? For example, if a 40 lb bag of coal is worth 480,000 BTUs and you burn one bag a day, your hourly BTU output would be 20,000 BTU. Granted, you'd have to account for the efficiency of your stove so say your stove is 85% efficient and you'd have a actual output of 17,000 BTU, etc etc.

I used 40 lbs because it was the easiest to convert...obviously this would change with your own particular stove. Granted, to get a good average, you'd have to avoid small sample size and track it over a full week or a month even but you'd get a good average of what your stove is actually putting out compared to what it is rated at. My stove is rated at 30,000 BTU but I have never averaged even close to that. The most I will ever hit in a 24 hour period is around 20,000 or so and that's when its burning as hot as I dare without overfiring it (top of the stove will be around 650-700 at that point)

Thoughts? Or am I overthinking it?
Davian
 
Stove/Furnace Make: Morso
Stove/Furnace Model: 1410 Squirrel

Re: Need internal length and width dimensions for your firebox

PostBy: ddahlgren On: Mon Feb 03, 2014 10:39 am

I think most are rated for gross input as efficiency involves a lot of things including how it is installed. There is also the size of the area available airflow over the stove and temperature of the space you are trying to heat. You get the greatest heat transfer with a bigger difference in temperature.
ddahlgren
 
Hand Fed Coal Stove: Crane 404

Re: Need internal length and width dimensions for your firebox

PostBy: McGiever On: Mon Feb 03, 2014 12:21 pm

Lots of variables...can not ignore them...makes it real hard to see actual truth!
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: Need internal length and width dimensions for your firebox

PostBy: lsayre On: Fri Jun 27, 2014 5:58 am

I'm still waiting for the internal dimensions of the Hitzer stoves fireboxes. Nominal length and width of the firebox inside the firebricks.
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: Fire375 On: Thu Jul 03, 2014 2:05 pm

The brochure says 24.25 x 14.5
Fire375
 
Stove/Furnace Make: Hitzer Stoker
Stove/Furnace Model: 710

Re: Need internal length and width dimensions for your firebox

PostBy: Fire375 On: Thu Jul 03, 2014 2:08 pm

Hitzer 30-95 brochure says 20 x 12
Fire375
 
Stove/Furnace Make: Hitzer Stoker
Stove/Furnace Model: 710

Re: Need internal length and width dimensions for your firebox

PostBy: Sting On: Thu Jul 03, 2014 2:44 pm

jUST FOR A GRIN - And yes this boiler is cold and its been cold since 1995 LOL

Kewanee BOILER NUMBER 3R7
gross output MBh 936
-horsepower 28
-steam per hour. 212° lbs. 965
steam-sq. ft. 13SO 3900
'Firing Rate--Gas MBtuh 1170
--Stoker Lb. per hr. 104
Heating Surface 40.4

-Total Sq. Ft. 153
Furnace Volume Cu. Ft.
Firebox Volume above Mudring Cu. Ft. 23.6

Safety Valve Capacity Lb. Steam per hr.1224

Firing rates based on 140.000 Btu Oil: 12,000 Btu Coa l.

firebox length 53
width 28
height 26
Sting
 
Other Heating: BurnHAM=NG-gas

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