Kane 905 - Calculation of Fuel Data; Fuel Data Calculation Example and Constants

KANE905 Operators Manual Page 46
C. CALCULATION OF FUEL DATA
For any fuel not specified by Kane International the net calorific value,
gross calorific value and composition should be obtained from the fuel
supplier.
The following fuel data has been calculated with reference to the
efficiency calculation.
Example 1:
Chemical composition: C 25%
H
2
3%
H
2
O 50%
Q
net
8.35 MJ/kg
Q
g
9.3 MJ/kg *
Max CO
2
20.4%
K1n = (255 x % carbon in fuel) / Q
net
(kJ/Kg)
= (255 x 25) / 8350 = 0.763
K1g = (255 x % carbon in fuel) / Q
g
(kJ/Kg)
= (255 x 25) / 9300 = 0.685
K2 = Max % CO
2
= 20.40
K3 = Wet Loss = [(9 x %H
2
+ %H
2
O) / 9300] x 2425
= [(9 x 3 + 50) / 9300] x 2425
= (77 / 9300) x 2425 = 20.08
K4 = 65 (an approximation for wood) *
The fuel values to program into the
Analyser are as follows:
NATURAL GAS
K1g
: 0.763
K1n
: 0.685
K_2
: 20.4
K_3
: 20.08
K_4
: 65
O2r
: 8.0
* Assumed values in the absence of supplied data.
See previous appendix for other fuels.