COMPARISON OF ENERGY VALUES
Table 1. Comparative heating values of various commercial fuels
|
Fuel 1/ |
Unit |
Gross calorific value |
|
Anthracite |
MJ/kg |
31.4 |
|
Hard coal |
MJ/kg |
29.3 |
|
Lignite |
MJ/kg |
26.7 |
|
Coal briguettes |
MJ/kg |
29.3 |
|
Coke |
MJ/kg |
28.4 |
|
Heavy fuel oil |
MJ/kg |
42.6 |
|
Middle fuel oil |
MJ/kg |
43.1 |
|
Light fuel oil |
MJ/kg |
43.5 |
|
Gas oil (diesel fuel) |
MJ/kg |
45.6 |
|
Kerosine |
MJ/kg |
46.5 |
|
Butane |
MJ/kg |
49.3 |
|
Propane |
MJ/kg |
50.0 |
|
Natural gas |
MJ/m3 |
37.3 |
|
Coke-oven gas |
MJ/m3 |
19.5 |
|
Producer gas |
MJ/m3 |
5.0 |
|
Wood |
MJ/kg |
19.8 |
1/ Moisture free
Sources: (73) (78) (101)
Table 2. Approximate heating values of wood and various wood residues
|
Fuel |
Moisture content 1/ |
Gross calorific values 2/ |
|
(%) |
(MJ/kg) |
|
|
Heating values at typical moisture levels |
|
|
|
Green wood |
50 |
9 5 |
|
Green sawdust |
50 |
9,5 |
|
Seasoned wood (air-dried) |
20 |
15.5 |
|
Dry planer shavings |
13 |
16.2 |
|
Dry sawdust |
13 |
16.2 |
|
Wood pellets |
10 |
16.75 |
|
Comparative heating values (Bone dry basis) |
|
|
|
Range: |
|
|
|
Dry wood (non-resinous) |
0 |
18.0 - 20.0 |
|
Dry bark (non-resinous) |
0 |
17.0 - 23.0 |
|
Dry wood (resinous) |
0 |
22.0 - 23.0 |
|
Dry bark (resinous) |
0 |
20.0 - 25.0 |
|
Dry wood (average) |
0 |
19.8 |
|
Stemwood |
0 |
19.1 |
|
Bark |
0 |
19.6 |
|
Branches |
0 |
20.1 |
|
Needles |
0 |
20.4 |
1/ Wet basis
2/ Dependent on species
Sources: (17) (22)
