To Study use of Rubber Seed Oil Blends Diesel Fuel at Various Injection Pressures

The physico-chemical properties of the fuel, such as viscosity, volatility, density, flash point and fire point affect the performance and combustion process. If high viscosity and density biofuel are directly supplied into the engine, complete combustion will not take place in the combustion chamber. Hence different methodologies are employed to get the better performance or atomization of the fuel. In this experimental study, the effect of injection pressure (IP) on the performance and emission of compression ignition (CI) engine fuelled with rubber seed oil as biodiesel and its blends with pure diesel was evaluated. The engine tests were conducted on constant speed diesel engine fuelled with diesel and various bio-blends of rubber seed oil (RSO) at the proportion of B20. The test results were compared with that of pure diesel as engine test fuel at various injection pressures of 200, 220 and 240 bar. The results show that the brake thermal efficiency has been improved with B20 (20% RSO and 80% pure diesel) at an IP of 240 bar compared to other biofuels at different injection pressures. It was also observed that the emissions, such as carbon monoxide (CO), unburned hydrocarbons (UHC) were considerably reduced and NOx emissions increased when compared to other biofuels at different injection pressures.