Abstract
A dual bio-fuel (Jatropha oil and Rubber Seed oil) blend mixed with the pure diesel has been charged in to a single cylinder Direct Injection (DI) constant speed diesel engine to analyse the performance and emission characteristics. While conducting the experiment, the engine was running at 1500 rpm and the fuel injection pressure of 240 bar was maintained instead of the designed pressure of 220 bar. Biodiesel blends at different propositions were prepared by volume basis such as B20, B40, B60, B80 and B100. The test engine had been running at different load conditions of 0%, 25%, 50%, 75% and 100% at the engine rated power of 4.4 kW. From the experimental result, it was observed that the specific fuel consumption was lowered and the brake thermal efficiency increased for B20 blend at all load conditions. After the emission analysis, the parameters such as Carbon Monoxide (CO), Hydro Carbons (HC) and Nitric Oxide (NOx) were decreased for the blend B20, and the Carbon Dioxide (CO2) emission was increased. While using B100 at full load condition, the emission was increased considerably. Finally, for the increased injection pressure of 240 bar, the B20 blend shows the acceptable result compared to other biodiesel proportions at all engine loads.
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