Kimo KIGAZ 210 - Calculations of the Different Parameters; CO, no and Nox Conversions; Calculation of the Level in Nox; Calculation of Flue Gas Velocity

22. Calculations of the different parameters
22.1. CO, NO and NOx conversions
CO [
mg
mg
3
]=CO[ppm ]x1.24922
NO [
mg
mg
3
]=NO[ppm ]x1.33845
NO
x
[
mg
mg
3
]=NO
x
[ ppm] x2.05229
Conversions on units are the same for both gases. CO is taking as an example.
O
2
reference (O
2ref
) is only linked to CO and NO.
λ=
CO
2max
CO
2
=
21
21−O
2
CO[
mg
kWh
]=CO [
mg
m
3
]λ
V
f
PCIx0.277778
CO [
g
kWh
]=CO[
mg
m
3
]λ
V
f
PCIx0.277778
x0.001
CO [
g
GJ
]=CO [
mg
kWh
]λ
V
f
PCIx0.277778
x0.001
CO [
mg /m
3
O
2ref
]=CO [
mg
m
3
] x
21−O
2ref
21−O
2
CO[
ppm
O
2ref
]=CO [ppm ]x
21−O
2ref
21−O
2
CO [%]=CO [ ppm] x0.0001
CO [
g
m
3
]=CO[
mg
m
3
]x 0.001
With:
• O
2ref
a reference value selected by the user, this value has to be entered in the device in %.
• O
2
oxygen value measured in %.
• V
F
the theoretical volume of flue gas in m
3
(given in the table of coefficient)
• NCV the net calorific value in MJ (given in the table of coefficient)
• CO
2max
the maximum level in % in carbon dioxide of flue gas dry products (given in the table of coefficient)
22.2. Calculation of the level in NOx
NO
x
=
NO
0.97
with NO the level in nitrogen monoxide in ppm.
0.97 if the %NO
2
is at 3% in the “Setting” menu.
0.95 if the %NO
2
is at 5% in the “Setting” menu.
So for the measurement of the NO and NO
2
NO
x
=NO + NO
2
22.3. Calculation of flue gas velocity
V =k
√
2 Δ P
M
VF
With:
• k: coefficient of the differential pressure item
• ΔP: differential pressure (dynamic pressure).
• M
VF
: mass density of the flue gas (already calculated for the calculation of the higher efficiency).
42 Calculations of the different parameters