UEi Test Instruments KM9106/P - Manual (Page 66)

KM9106 Operators Manual 66
D. 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%
H2 3%
H2O 50%
Qnet 8.35 MJ/kg
Qg 9.3 MJ/kg *
Max CO2 20.4%
K1n = (255 x % carbon in fuel) / Qnet (kJ/Kg)
= (255 x 25) / 8350 = 0.763
K1g = (255 x % carbon in fuel) / Qg (kJ/Kg)
= (255 x 25) / 9300 = 0.685
K2 = Max % CO2 = 20.40
K3 = Wet Loss
= [(9 x %H2 + %H2O) / 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
K_2
K_4
: 0.763
: 20.4
: 65 K1n
K_3
O2r : 0.685
: 20.08
: 8.0
* Assumed values in the absence of supplied data. See previous appendix for other
fuels.