5.12.4 Calculation of the emission mass flow rates
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5.12.4 Calculation of the emission mass flow rates

  5.12.4.1 The emission mass flow rates for each mode shall be calculated as follows (for the raw exhaust gas):

Gassmass = u·conc·GEXHW (15)

or

Gassmass = v·conc·VEXHW (16)

or

Gassmass = w·conc·VEXHW (17)

  5.12.4.2 The coefficients u-wet, v-dry and w-wet shall be used as specified in table 5.

Table 5 Coefficients u, v, w

Gas u v w conc
NOx 0.001587 0.002053 0.002053 ppm
CO 0.000966 0.00125 0.00125 ppm
HC 0.000479 - 0.000619 ppm
CO2 15.19 19.64 19.64 percent
O2 11.05 14.29 14.29 percent

Note The coefficients for u given in table 5 are correct values for an exhaust density of 1.293 only; for exhaust density ≠ 1.293, u = w/density.

Parent topic: 5.12 Calculation of the gaseous emissions
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