Energy Values of Wood
Energy values at the range of moisture content values (MC%)
|
Moisture Content (wet basis) %
|
Energy value Gigajoules per tonne (GJ/t)
|
|
60
|
5.60
|
|
55
|
6.61
|
|
45
|
8.63
|
|
40
|
9.64
|
|
35
|
10.65
|
|
30
|
11.66
|
|
25
|
12.68
|
|
20
|
13.69
|
|
18
|
14.09
|
|
15
|
14.70
|
|
10
|
15.71
|
One gigajoule (GJ) = 277.78 Kilowatt-hours.
Energy Value (GJ/tonne) = 17.7283 – (0.2021 x mc)
(NB ‘mc’ is moisture content in a whole number; ie. 50% = ‘50’ , and is a percentage of total ‘sample’ weight ).
Energy Value Increase due to drying:
|
Drying Range
|
% Energy Value Increase
|
|
60% to 35%
|
90.2%
|
|
60% to 30%
|
108.2%
|
|
60% to 20%
|
144.5%
|
| |
|
|
55% to 35%
|
61.1%
|
|
55% to 30%
|
76.4%
|
|
55% to 20%
|
107.1%
|
Decrease in Weight on Drying, (% tonnage loss):
|
Drying Range
|
% Weight Loss
|
|
60% to 35%
|
25%
|
|
60% to 30%
|
30%
|
|
60% to 20%
|
40%
|
| |
|
|
55% to 35%
|
20%
|
|
55% to 30%
|
25%
|
|
55% to 20%
|
35%
|