Effect of hot EGR on combustion, performance and emission characteristics of Vateria Indica biodiesel in CI engine.

Vateria Indica Linn is a tree belonging to Dipterocarpaceae family. The seed of Vateria Indica Linn contains about 19% of oil/fat. By a novel method the oil/fat in the seed is converted into biodiesel. In the previous work the effect of Vateria Indica Methyl Ester (VIME biodiesel) on engine parameters is tested in a single cylinder CI engine by varying injection pressure (180 to 220bar in step of 20bar) and injection timing (19˚, 23˚ and 27˚ bTDC). VIME is blended with diesel (10%, 15%, 20% and 25% of biodiesel v/v), which were called as B10, B15, B20, B25. Based on this works injection pressure of 220bars and injection timing of 27˚bTDC for B25 blend is selected as best. But in the previous work NOx emission is found to be considerable for the best parameters. The purpose this work is to study the effect of hot EGR on combustion, performance and emission characteristics of a CI engine with diesel and B25 blend with 5% and 10% hot EGR for NOx mitigation. Here it can be noted that EGR lowers the performance but the emission characteristic is better compared to base line diesel. Based on the present work 10% EGR is recommended for blend B25 at selected optimum operating parameters. [ABSTRACT FROM AUTHOR]