Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:9:p18
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 9 (pt 18/71)
Character Range: 259080–262435

composition is not known, the following stoichiometric factors may be used: FS (diesel) = 13,4
              FS (LPG) =   11,6

              FS (NG) = 9,5

4.3.2.                        Systems with flow compensation

              For systems without heat exchanger, the mass of the pollutants (g/test) shall be determined by calculating the instantaneous mass emissions and integrating the instantaneous values over the cycle. Also, the background correction shall be applied directly to the instantaneous concentration value. The following formulae shall be applied:

              where:

              conce = concentration of the respective pollutant measured in the diluted exhaust gas, ppm concd = concentration of the respective pollutant measured in the dilution air, ppm
              MTOTW,i = instantaneous mass of the diluted exhaust gas (see Section 4.1), kg MTOTW = total mass of diluted exhaust gas over the cycle (see Section 4.1), kg
              KH,D = humidity correction factor for diesel engines as determined in Section 4.2 KH,G = humidity correction factor for gas engines as determined in Section 4.2 DF              = dilution factor as determined in Section 4.3.1.1
4.4.                            Calculation of the specific emissions

        The emissions (g/kWh) shall be calculated for all individual components in the following way:

              where:

              Wact = actual cycle work as determined in Section 3.9.2, kWh

5.                                 CALCULATION OF THE PARTICULATE EMISSION (DIESEL ENGINES ONLY)

5.1.                            Calculation of the mass flow

              The particulate mass (g/test) shall be calculated as follows:

              where:

              Mf= particulate mass sampled over the cycle, mg

              MTOTW = total mass of diluted exhaust gas over the cycle as determined in Section 4.1, kg

              MSAM = mass of diluted exhaust gas taken from the dilution tunnel for collecting particulates, kg and:
              Mf = Mf,p + Mf,b if weighed separately, mg

              Mf,p = particulate mass collected on the primary filter, mg Mf,b = particulate mass collected on the back-up filter, mg
              If a double dilution system is used, the mass of the secondary dilution air shall be subtracted from the total mass of the double diluted exhaust gas sampled through the particulate filters

        MSAM = MTOT  - MSEC

              where:

              MTOT = mass of double diluted exhaust gas through particulate filter, kg MSEC = mass of secondary dilution air, kg
              If the particulate background level of the dilution air is determined in accordance with Section 3.4, the particulate mass may be background corrected. In this case, the particulate mass (g/test) shall be calculated as follows:

              where:

              Mf, MSAM, MTOTW = see above

              MDIL = mass of primary dilution air sampled by background particulate sampler, kg

              Md = mass of the collected background particulates of  the primary  dilution air, mg DF = dilution factor as determined in Section 4.3.1.1

5.2.                            Calculation of the specific emission

              The particulate emission (g/kWh) shall be calculated in the following way:

              where:

              Wact =