Doc653/30CV02A
29
9 Conversion formulae and factors
Formulae
CO
measured O
2
2
20 9
11 7
=
−
×
.
.
20.9
O
2
20 9
20 9
11 7
=
−
×
.
.
.
measured CO
2
11.7% CO
2
is the maximum CO
2
percentage that is generated by stoichiometric burning of G20
natural gas (H-gas).
Excess air N:
N
easured
=
−
×
20 9
9
0 914
.
.
20.
m
O
2
or
N
m
= +
−
×
1
11 7
1
0 914
.
.
CO
easured
2
Conversion factors
For NO
x
(N=1):
1 ppm = 2.05 mg/m
3
=1.759 mg/kWh = 0.498 mg/MJ
For CO (N=1):
1 ppm = 1.24 mg/m
3
=1.064 mg/kWh = 0.298 mg/MJ
Example:
Measured values for an environmentally friendly unit:
NO
x
= 15 ppm
CO
2
= 10%
What is the value for NO
x
according to the most usual standard in mg/kWh for N=1?
O
2
20 9
10 20 9
11 7
3
=
−
×
=
.
.
.
%
N
=
−
=
20 9
20 9 3
1 17
.
.
.
NO
x
(for N = 1) =
15.0
×
1.17
= 17.6 ppm
17.6
×
1.759 = 30.9 mg/kWh
W
Kcal/h
Btu/h
1
0.86
3.41
1.163
1
3.97
0.293
0.252
1
Table 13
Conversion factors
Summary of Contents for ECONOFLAME R30
Page 35: ...Doc653 30CV02A 31...
Page 36: ...32 Doc653 30CV02A...
