Average usage per day

Re: Average usage per day

PostBy: Berlin On: Wed Dec 15, 2010 11:00 pm

David, any underfeed bituminous stoker, if operated properly and supplied with proper heat reflection in the firebox, can reach 85% combustion efficiency. Efficiency losses from handfiring bituminous coal are not significantly different from losses with anthracite; instead of wasting hydrocarbons as visable smoke, you're wasting carbon as CO. In a large hand-fired appliance where the fire is constantly burning especially low, with bituminous coal sooting of the heat exchanger you will lose heat transfer efficiency (that's not combustion efficiency losses, but overall efficiency), but in a stoker properly tuned, or in a hand-fired appliance that's not significantly oversized, you will get very little if any soot buildup on the heat exchange surfaces. In fact, anthracite coal generally requires a higher percentage of excess air to achieve complete combustion, and in tests on both inclined bed or underfeed stokers bituminous coals consistantly achieve better combustion efficiencies.
Hot Air Coal Stoker Furnace: Will-Burt Combustioneer 77B
Coal Size/Type: Ohio BITUMINOUS pea stoker coal

Re: Average usage per day

PostBy: caper1175 On: Fri Jan 07, 2011 2:55 pm

I'm not exactly sure about the weight, but I average 4- 5 five gallon buckets per 24/hr period. I would estimate each bucket weighs 30-40lbs. I'm heating ~1800sq/ft house, and a 672sq/ft detached garage.
Stove/Furnace Make: Viking Jr.

Re: Average usage per day

PostBy: ceccil On: Sat Jan 08, 2011 2:43 am

Using about 40# per day here keeping house 70' days and 68' nights. I may be using a bit less but not much this year vs. past years after replacing windows and insulating, but the heat in the house is much more even now. Still have to insulate one wall in the kitchen and some more in the attic. Can't do the last wall in the kitchen until I come up with the $$ to replace the cabinets as they are built in and will be destroyed taking them out.
Stove/Furnace Make: Keystoker, Harman
Stove/Furnace Model: 90K, Mark III

Re: Average usage per day

PostBy: Short Bus On: Sat Jan 08, 2011 3:21 pm

Comparing usage can be done with this link.
So you want to compare coal usage.
Not as popular a system as I had thought
Short Bus
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only