Nox Correction for humidity and temperature. As the NOx emission depends on ambient air conditions, the NOx concentration must be corrected for ambient air temperature and humidity with the factors given in the following formulae: K = 1 with: H,D 1 + A ∗ (H − 10.71) + B ∗ (T − 298) a a A = 0.309 GFUEL/GAIRD -0.0266 B = -0.209 GFUEL/GAIRD +0.00954 Ta = temperature of the air, K Ha = humidity of the intake air, g water per kg dry air in which: H = 6.220 ∗ Ra ∗ pa a −2 pB − pa ∗ R a ∗ 10 Ra = relative humidity of the intake air, % ?a = saturation vapour pressure of the intake air, kPa ?B = total barometric pressure, kPa
