Calculation of Emission Mass Flow Rates Clause Samples

Calculation of Emission Mass Flow Rates. The emission mass flow rates for each mode shall be calculated as follows: (a) For the raw exhaust gas 1/: Gas mass = u × conc × GEXHW Gas mass = v × conc × V EXHD Gas mass = w × conc × VEXHW (b) For the dilute exhaust gas 1/: Gas mass = u × concc × GTOTW Gas mass = w × concc × VTOTW where: concc is the background corrected concentration concc = conc-concd × (1 - (1/DF)) DF = 13.4/(concCO2 + (concCO + concHC) × 10-4) or: DF = 13.4/concCO2 The coefficients u - wet, v - dry, w - wet shall be used according to the following table: 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 per cent The density of HC is based upon an average carbon to hydrogen ratio of 1/1.85.