Coal required to initially heat up your stove
- lsayre
- Member
- Posts: 21781
- Joined: Wed. Nov. 23, 2005 9:17 pm
- Location: Ohio
- Stoker Coal Boiler: AHS S130 Coal Gun
- Coal Size/Type: Lehigh Anthracite Pea
- Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Example for a 500 lb. stove, which is 10% cast iron, 20% fire brick, and 70% carbon steel (by weight). Heating it from 70 degrees to 450 degrees F.
Specific Heat Capacities:
Cast Iron = 0.110
Fire Brick = 0.210
Carbon Steel = 0.120
Stove Material Weights:
Cast Iron = 50 lbs.
Fire Brick = 100 lbs.
Carbon Steel = 350 lbs.
450 degrees minus 70 degrees = 380 degrees of rise
Cast Iron: 0.110 x 50 x 380 = 2,090 BTU's
Fire Brick: 0.21 x 100 x 380 = 7,980 BTU's
Carbon Steel: 0.120 x 350 x 380 = 15,960 BTU's
Total BTU's = 2,090 + 7,980 + 15,960 = 26,030 BTU's
For anthracite at 12,250 BTU's/Lb. (as delivered):
26,030/12,250 = 2.13 lbs.
2.13/0.70 = 3.04 (efficiency adjusted)
It takes only about 3.04 lbs. of anthracite to heat a typical 500 lb. stove from 70 degrees to 450 degrees. Just thought you might want to know.
Specific Heat Capacities:
Cast Iron = 0.110
Fire Brick = 0.210
Carbon Steel = 0.120
Stove Material Weights:
Cast Iron = 50 lbs.
Fire Brick = 100 lbs.
Carbon Steel = 350 lbs.
450 degrees minus 70 degrees = 380 degrees of rise
Cast Iron: 0.110 x 50 x 380 = 2,090 BTU's
Fire Brick: 0.21 x 100 x 380 = 7,980 BTU's
Carbon Steel: 0.120 x 350 x 380 = 15,960 BTU's
Total BTU's = 2,090 + 7,980 + 15,960 = 26,030 BTU's
For anthracite at 12,250 BTU's/Lb. (as delivered):
26,030/12,250 = 2.13 lbs.
2.13/0.70 = 3.04 (efficiency adjusted)
It takes only about 3.04 lbs. of anthracite to heat a typical 500 lb. stove from 70 degrees to 450 degrees. Just thought you might want to know.
- lsayre
- Member
- Posts: 21781
- Joined: Wed. Nov. 23, 2005 9:17 pm
- Location: Ohio
- Stoker Coal Boiler: AHS S130 Coal Gun
- Coal Size/Type: Lehigh Anthracite Pea
- Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
This critical knowledge when combined with about $3 might get you a cup of coffee at Starbucks.
- hotblast1357
- Member
- Posts: 5657
- Joined: Mon. Mar. 10, 2014 10:06 pm
- Location: Peasleeville NY
- Stoker Coal Boiler: 1984 Eshland S260 coal gun
- Coal Size/Type: Lehigh anthracite pea
- Other Heating: air source heat pump, oil furnace
Ok so what about a boiler now?! Say the AHS 130.
- hotblast1357
- Member
- Posts: 5657
- Joined: Mon. Mar. 10, 2014 10:06 pm
- Location: Peasleeville NY
- Stoker Coal Boiler: 1984 Eshland S260 coal gun
- Coal Size/Type: Lehigh anthracite pea
- Other Heating: air source heat pump, oil furnace
- lsayre
- Member
- Posts: 21781
- Joined: Wed. Nov. 23, 2005 9:17 pm
- Location: Ohio
- Stoker Coal Boiler: AHS S130 Coal Gun
- Coal Size/Type: Lehigh Anthracite Pea
- Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
I gave some thought to this, and insulating firebrick might be on average about 1,200 degrees where in contact with the coal and the fire, but closer to only 450 degrees on the backside where it meets up with the carbon steel. Therefore, firebricks midrange temperature is (1,200 +450)/2 = 825 degrees. Thus the correction:
Cast Iron: 0.110 x 50 x 380 = 2,090 BTU's
Fire Brick: 0.21 x 100 x 825 = 17,325 BTU's
Carbon Steel: 0.120 x 350 x 380 = 15,960 BTU's
Total BTU's = 2,090 + 17,325 + 15,960 = 35,375 BTU's
For anthracite at 12,250 BTU's/Lb. (as delivered):
35,375/12,250 = 2.89 lbs.
2.89/0.70 = 4.13 Lbs. (efficiency adjusted)
Final answer: It takes roughly about 4.13 lbs. of anthracite to heat a typical 500 lb. stove from 70 degrees to 450 degrees.
Cast Iron: 0.110 x 50 x 380 = 2,090 BTU's
Fire Brick: 0.21 x 100 x 825 = 17,325 BTU's
Carbon Steel: 0.120 x 350 x 380 = 15,960 BTU's
Total BTU's = 2,090 + 17,325 + 15,960 = 35,375 BTU's
For anthracite at 12,250 BTU's/Lb. (as delivered):
35,375/12,250 = 2.89 lbs.
2.89/0.70 = 4.13 Lbs. (efficiency adjusted)
Final answer: It takes roughly about 4.13 lbs. of anthracite to heat a typical 500 lb. stove from 70 degrees to 450 degrees.
- 2001Sierra
- Member
- Posts: 2211
- Joined: Wed. May. 20, 2009 8:09 am
- Location: Wynantskill NY, 10 miles from Albany
- Hot Air Coal Stoker Stove: Keystoker 90 Chimney vent
- Coal Size/Type: Rice
- Other Heating: Buderus Oil Boiler 3115-34
Final answer: It takes roughly about 4.13 lbs. of anthracite to heat a typical 500 lb. stove from 70 degrees to 450 degrees.
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Plus 2 beers
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Plus 2 beers