Document Type : Primary Research paper
Department of Automobile Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology
Department of Aeronautical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology
and nitrogen oxides had increased. It is found that B20 shows the maximum brake thermal efficiency and minimum brake specific energy consumption. Emission characteristics also studied and it found that except nitrogen oxide emissions other emissions are significantly reduced. Influence of hydrogen such as 2 lpm, 4 lpm, 6 lpm, 8 lpm and 10 lpm on B20 is studied. The diesel has increased brake specific energy consumption and reduced brake thermal efficiency compared with jatropha biodiesel blended diesel. To overcome this, a B20 biodiesel is used with 8 lpm hydrogen as secondary fuel. This result in the increase of brake thermal efficiency is about 3.26 % and 0.5 % higher than pure diesel and B20+10 lpm hydrogen respectively and correspondingly reduces the brake specific energy consumption is about 5.7MJ/kWh compared to diesel. The emission characteristics of unburned hydrocarbon, carbon monoxide and smoke opacity reduces significantly about 29ppm, 0.16% and 4.5 % respectively. NOx emissions increase about 140 ppm and 272 ppm when compared to B20 and diesel respectively. It is mainly due to oxygen concentration the peak combustion temperature increased in the combustion chamber.