sy24inst2 - The Initiative Group
sy24inst2 - The Initiative Group
sy24inst2 - The Initiative Group
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Rendamax<br />
9 Conversion formulae and factors<br />
Formulae<br />
CO<br />
2<br />
20.<br />
9 − measured O<br />
=<br />
20.9<br />
2<br />
× 11.<br />
7<br />
measured CO × 20.<br />
9<br />
O 2 = 20.<br />
9 −<br />
2<br />
11.<br />
7<br />
11.7% CO 2 is the maximum CO 2 percentage that is generated by stoichiometric burning of G20<br />
natural gas (H-gas).<br />
Excess air N:<br />
20.<br />
9<br />
N =<br />
20. 9 − m easured O 2<br />
× 0.<br />
914<br />
or<br />
N = 1 ⎛ 11.<br />
7 ⎞<br />
+ ⎜<br />
− 1⎟ ⎝ m ⎠<br />
× 0.<br />
914<br />
CO easured<br />
2<br />
Conversion factors<br />
For NO x (N=1):<br />
1 ppm = 2.05 mg/m 3 = 1.759 mg/kWh = 0.498 mg/MJ<br />
For CO (N=1):<br />
1 ppm = 1.24 mg/m 3 = 1.064 mg/kWh = 0.298 mg/MJ<br />
Example:<br />
Measured values for an environmentally friendly unit:<br />
NO x = 15 ppm<br />
CO 2 = 10%<br />
What is the value for NO x according to the most usual standard in mg/kWh for N=1?<br />
10 × 20.<br />
9<br />
O 2 = 20.<br />
9 − = 3%<br />
11.<br />
7<br />
20.<br />
9<br />
N =<br />
20.<br />
9 − 3<br />
= 117 .<br />
NO x (for N = 1 ) =<br />
15.0 x 1.17 = 17.6 ppm<br />
17.6 x 1.759 = 30.9 mg/kWh<br />
W kcal/h Btu/h<br />
1<br />
1.163<br />
0.293<br />
0.86<br />
1<br />
0.252<br />
3.41<br />
3.97<br />
1<br />
Table 11<br />
Conversion factors<br />
1 kcal = 4.187 kJ<br />
1 kWh = 3.6 MJ<br />
Doc586/50CV22C 37
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