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The following equations are used to calculate the listed values:
CO
value:
CO
2
2
Flue gas loss:
qA = (FT-AT)
If the fuel-specific factors A2 and B are zero, the Siegertsche Formula is applied using factor f:
qA = f x
Burner
efficiency :
Eta = 100 - qA
Excess air
value l:
l =
21% - O
NOx:
NOx = NO + NO
CO undiluted :
CO undiluted = CO x l
Calculating ppm in mg/m
CO (mg/m 3 )
CO =
(mg/m 3 )
NO
=
NO
x
x
CO
x (21% - O
2max
=
21%
A2
+ B
(21 - O
)
2
(FT - AT)
CO
2
21%
%
2
x NO
add
3
referred to the O
2
21 - O
-reference
2
x CO (ppm) x 1.25
(21-O
)
2
21 - O
-reference
2
x NO
x
(21-O
)
2
German Calculation Information
%)
CO
2
2max
21 %
O
%
2
FT
- K K
AT
A2/B
21
O
2
K K
FT
AT
CO
2
f
If qA is negative, Eta will be greater than 100%.
NO
add
CO
l
reference value
21
O
2
(ppm) x 2.05
21
O
2
56
: Fuel-specific maximum
CO
value
2
: Oxygen level of air in %
: Measured oxygen level
in %
: Flue gas temperature
: Ambient air temperature
: Fuel-specific factors
: Oxygen level in air
: Measured oxygen level
: is a factor which can turn into a
negative value if qA falls below the
temperature. Necessary for
measurements on burners.
: Flue gas temperature
: Ambient air temperature
: calculated CO
value
2
: fuel-specific factor
: NO2 addition factor
: Measured CO value
: Excess air value
: Oxygen level in air
: Measured oxygen level
: Oxygen level in air
: Measured oxygen level
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