- Improving the Combustion Efficiency of Ddiesel Fuel by Using Nano - Additives/تحسين كفاءة احتراق وقود الديزل باستخدام اضافات نانوية

Abstract

This study investigates the effect of nanoparticles fuel additives (ZnO) on the combustion performance of emission characteristics of diesel engine. Diesel fuel was mixed with the ZnO nanoparticle size in the mass fractions of (50 and 100 ppm) by using ultrasonicator.Direct injection (DI), water cooled four cylinders, in-line, natural aspirated Fiat diesel engine was used and run at a constant speed at (1500 rpm) and constant fuel injection pressure (400 bar) with varying the operation load. The obtained results were compared with those obtained when the engine run at the same conditions for the same diesel fuel but without ZnO nanoparticles. Measurements indicated that there was improvement in the thermal efficiency and the brake specific fuel consumption with increasing the dosing level of ZnO nanoparticles in the blended fuel. The emission results at all loads showed that NOx and smoke generated by ZnO blended fuels were less than those generated by diesel fuel. Diesel fuel produced CO and HC more than ZnO blended fuel at high load and less at low load.