Calculate exhaust gas recirculation flow rate, dilution percentage, and effect on combustion temperature and NOx reduction.
Input Parameters
Results
--
Intake Air Flow
g/s
--
EGR Mass Flow
g/s
--
Est. NOx Reduction
%
--
Combustion Temp Drop
°F
Note: EGR rates of 10-25% are typical. Above 20%, combustion stability degrades and soot increases. EGR coolers further reduce intake charge temperature.
Reference
Intake Flow = Displacement x RPM / (2x60) x Air_density x VE
EGR Flow = Intake x (EGR% / (1 - EGR%))
NOx Reduction ≈ EGR% x 3.5 (up to 70%)
Combustion Temp Drop ≈ EGR% x 12°F
EGR displaces fresh air, lowering peak temps