HOMER Pro 3.9
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Type: |
Input Variable |
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Units: |
grams per unit fuel (fuel units can be L, m3, or kg) |
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Symbol: |
fgen,NOx |
The amount of nitrogen oxides emitted per unit fuel consumed by the generator. The actual quantity of this pollutant produced by the generator will depend on engine design and operating conditions, principally the power output of the generator. But HOMER makes a simplifying assumption that this factor is constant.
The following graph shows the value of the nitrogen oxides emissions factor for diesel generators in the size range 50 kW - 450 kW. The source of these data is an unpublished NREL report by Erin Kassoy entitled "Modeling diesel exhaust emissions in diesel retrofits". HOMER's default value for the generator's nitrogen oxides emissions factor is equal to the average value between 50% and 100% load.
HOMER uses this value to calculate the emissions of nitrogen oxides. For details, see the article on How HOMER Calculates Emissions.
