An experimental study of the addition of air mass flow rate using a 30% emulsion-fueled diesel engine at high load

This study aims to examines the addition of air mass flow rate into the combustion chamber using E30 emulsion fuel (Water 70% + Dex 30% + 2% surfactant tween 80 + span 80) on a Diamond DI 800 stationary diesel engine on 1500 rpm. Engine performance was evaluated using a combustion analyzer and emissions measured with an engine gas analyzer. The results showed the addition of air mass flow rate affected engine performance and emissions. Output power observed to have decreased by 0.016% while SFC and thermal efficiency increased by 2,077% and 33,053%, respectively, compared to diesel fuel. Moreover, the BMEP and exhaust temperature also decreased, the most optimal reduction in BMEP was found to be 0.02% and the most optimum reduction in exhaust gas temperatures at 285 °C when compared to diesel 358 °C. The analysis of the combustion process for E30 emulsion fuel with variations in the air mass flow rate added showed the peak cylinder pressure at high loads was at 0.018 kg/s at a pressure of 5.86 bar. Meanwhile, the optimum heat release rate at high loads was obtained at a variation of 0.013 kg/s. As a conclusion, adding air mass flow rate to the E30 emulsion fuel has the ability to improve performance and reduce engine emissions.