Experimental investigation on diesel engine operating with CuO nanoparticles dispersed Azadirachta indica biodiesel

Abstract

This study aims to ascertain the operating parameters of a Copper oxide nanoparticle and Azadirachta indica biodiesel-powered diesel engine. Copper oxide nanoparticles were considered at 75 ppm, and three dispersants were added at the same ratio as nanoparticles. An ultrasonic bath sonicator was used to sonicate the nanoparticles, and later, the ultrasonicator was used to prepare the nanofuel. The experiment was conducted on a diesel engine with different injection timings, such as 21 °bTDC, 23 °bTDC, and 25 °bTDC at full load. The performance was slightly improved by mixing nanoparticles with B20, and it got even better by adding dispersants. The combustion parameters were also changed compared to diesel. Finally, the emissions of carbon monoxide, unburnt hydrocarbons, nitrogen oxides and smoke opacity were significantly reduced by the dispersion of nanoparticles. Increasing the injection timing also led to better results, and 25 °bTDC showed better results. The B20+CuO75+QPAN 75 has shown the most remarkable effects among other samples. At 25°bTDC, the brake thermal efficiency, brake specific fuel consumption, cylinder pressure, net heat release rate, were 35.03 %, 0.391 kg/kWh, 66.23 bar, and 89.39 J/°CA, respectively, while carbon monoxide, unburnt hydro carbons, smoke, and oxides of nitrogen were 0.089 %, 32 ppm, 19.351 %, and 1238 ppm.