Lamtec LT2 - Calculation of Combustion Efficiency; Calculation of the CO 2 Concentration

17
4 Technical Description
4.4.3 Calculation of Combustion Efficiency
The calculation follows the formula:
Calculation of exhaust gas losses is based on the following mean fuel values:
It is assumed that the combustion is CO and soot-free.
Exhaust gas losses through bound heat are not taken into account.
Measurement accuracy:
Temperature - better than 2 K
Efficiency/exhaust gas losses - better than 0.2 %
Electric connections:
depending on configuration/components
4.4.4 Calculation of the CO
2
Concentration
Calculated by referring to the fuel from the measured O
2
value and the CO
2
maximum
value type 657R0910
The calculation follows the formula:
CO
2
= CO
2
max – (21 % -O
2
/ 21 %)
The calculation is based on the following max. CO
2
-contents at  = 1  O
2
= 0 % vol.
referenced to dry exhaust gas.
Individual specification of CO
2
max. is possible via the parameters 846, 862, 878 and 894.
h
F
= 100 (q
Af
+ q
Ag
) %
q
Af
= Exhaust gas loss through free heat
q
Ag
= Exhaust gas loss through bounded heat
q
Af
=(t
A
- t
L
) * [A
2
/21 - O
2
+ B]
Oil
Gas
A
2
= 0.68;
A
2
= 0.66;
B = 0.007
B = 0.009
Display:
Efficiency
Exhaust gas losses
Exhaust gas temperature
Intake air temperature
Other ranges on request
0 ... 100 %
0 ... 100 %
0 ... 320 °C
0 ... 320 °C
Light fuel oil
Natural gas
Heavy fuel oil
Natural gas
EL 15.4 Vol. %
H 12.0 Vol. %
HFO 15.9 Vol.%
L 11.7 Vol. %