Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:10:p2
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 10 (pt 2/32)
Character Range: 1273352–1276623

due regard for the following densities under the reference conditions of 273.15 K (0 °C) and 101.325 kPa:
              Carbon monoxide (CO)  g/l
              Carbon dioxide (CO2)  g/l
              Hydrocarbons:
               for petrol (E0) (C1H1.85)  g/1
               for petrol (E10) (C1H1.93 O0.033)  g/l
               for diesel (B0) (C1Hl.86)  g/1
               for diesel (B7) (C1H1.86O0.007)  g/l
               for LPG (C1H2.525)  g/l
               for NG/biomethane (CH4)  g/l
               for ethanol (E85) (C1H2.74O0.385)  g/l
                                       Nitrogen oxides (NOx)  g/1
              The density for NMHC mass calculations shall be equal to that of total hydrocarbons at 273.15 K (0 °C) and 101.325 kPa, and is fuel-dependent. The density for propane mass calculations (see paragraph 3.5. of Annex B5) is 1.967 g/l at standard conditions.
              If a fuel type is not listed in this paragraph, the density of that fuel shall be calculated using the equation given in paragraph 3.1.3. of this annex.
              3.1.3. The general equation for the calculation of total hydrocarbon density for each reference fuel with a mean composition of CXHYOZ is as follows:
              where:
                     ρTHC  is the density of total hydrocarbons and non-methane  hydrocarbons, g/l;
                     MWC is the molar mass of carbon (12.011 g/mol);
                     MWH is the molar mass of hydrogen (1.008 g/mol);
                     MWO is the molar mass of oxygen (15.999 g/mol);
                     VM is the molar volume of an ideal gas at 273.15 K (0° C) and 101.325 kPa (22.413 l/mol);
                     H/C is the hydrogen to carbon ratio for a specific fuel CXHYOZ;
                     O/C is the oxygen to carbon ratio for a specific fuel CXHYOZ.
              3.2. Mass emissions calculation
              3.2.1. Mass emissions of gaseous compounds per cycle phase shall be calculated using the following equations:
              where:
                   is the mass emission of compound i per test or phase, g/km;
                    is the volume of the diluted exhaust gas per test or phase expressed in litres per test/phase and corrected to standard conditions (273.15 K
                  (0 °C) and 101.325 kPa);
                   is the density of compound i in grams per litre at standard temperature and pressure (273.15 K (0 °C) and 101.325 kPa);
                   is a humidity correction factor applicable only to the mass emissions of oxides of nitrogen, NO2 and NOx, per test or phase;
                   is the concentration of compound i per test or phase in the diluted exhaust gas expressed in ppm and corrected by the amount of compound i contained in the dilution air;
                   is the distance driven over the applicable WLTC, km;
                  n is the number of phases of the applicable WLTC.
              3.2.1.1. The concentration of a gaseous compound in the diluted exhaust gas shall be corrected by the amount of the gaseous compound in the dilution air using the following equation:
              where:
                   is the concentration of gaseous compound i in the diluted exhaust gas corrected by the amount of gaseous compound i contained