|
Fuel |
Unit |
BTU/Unit |
Cost Per Unit |
| Shelled Dry Corn 14% | 1 pound | 8,000 BTU | $ 0.06 |
| HARDWOOD (20% moisture | cord 4'x4'x8' | 26,000,000 btu | $125.00 |
| SOFTWOOD(20% moisture) | cord 4'x4'x8' | 18,000,000 btu | $80.00 |
| COAL BITUMINUS | ton | 23,000,000 btu | $80.00 |
| COAL ANTHRACITE | ton | 24,800,000 btu | $150.00 |
| LP GAS | gallon | 91,400 btu | $3.00 |
| NATURAL GAS | cubic foot | 1030 btu | $0.50 |
| FUEL OIL #2 | gallon | 140,000 btu | $4.00 |
| FUEL OIL #6 | gallon | 150,000 btu | $*** |
| ELECTRICITY | kwh | 3412 btu | $0.08 |
| PELLETS(premium) | pound | 7,800 btu | $ 0.10 |
| KEROSENE #1 | gallon | 135,000 btu | $*** |
APPROXIMATE EQUIVALENTS
|
Fuels |
Pounds of Shelled Corn |
|
|
1 Ton of Hard Coal |
3360 |
|
|
1 Full4'x4'x8' Cord Hardwood |
2800 |
|
|
1 Ton of Wood Pellets |
2570 |
|
|
1000 kWh of Electricity |
635 |
|
|
1000 cu/ft Natural Gas |
170 |
|
|
1 Gallon of #2 Fuel Oil |
22 |
|
|
1 Gallon of Propane |
17 |
|
COMBUSTION PROCESSES AND THEIR COMBUSTION EFFICIENCY RANGES
|
|
|
PROCESS
|
TYPICAL COMBUSTION EFFICIENCY RANGE
|
| HOME FIREPLACE |
10-30 %
|
| SPACE HEATER |
50-80 %
|
| COMMERCIAL GAS BOILER |
70-82 %
|
| RESIDENTIAL GAS BOILER WITH ATMOSPHERIC BURNER "LOW EFFICIENCY" |
70-82 %
|
| OIL BURNER HEATING SYSTEM |
73-85 %
|
| INDUCED DRAFT FURNACE "MEDIUM EFFICIENCY" |
74-80 %
|
| BOILER WITH GAS BURNER |
75-85 %
|
| CONDENSING FURNACE (GAS & OIL) "HIGH EFFICIENCY" |
85-93 %
|
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