Numerical and experimental investigation on the effect of using blended gasoline-ethanol fuel on the performance and the emissions of the bi-fuel Iranian national engine

• Published in: Fuel (Guildford) 2023-04, Vol.337, p.127252, Article 127252
• Main Authors: Hosseini, Hossein, Hajialimohammadi, Alireza, Jafari Gavzan, Iraj, Ali Hajimousa, Mohammad
• Format: Article
• Language: English
• Subjects: Alternative fuel engines; Blended fuels; Emissions; Ethanol; Renewable fuel; Spark ignition engine
• ISSN: 0016-2361
• DOI: 10.1016/j.fuel.2022.127252

•Blended ethanol and gasoline fuel are experimentally and numerically investigated in EF7 engine.•Gasoline can be substituted with E10 and E15 in EF7 engine with lower emissions.•Ethanol fuel can be an appropriate fuel in Iran as it can be produced from natural gas.•E10 fuel is more efficient in terms of performance, while E15 fuel performs better in terms of emissions.•It is attempting to identify the best ethanol and gasoline blends to replace gasoline among the commonly studied blends (E5, E10, and E15). The purpose of this study is to provide a numerical and experimental analysis of the effects of using ethanol (as a renewable fuel) and gasoline blends on engine performance and emissions in an EF7 engine. Four alternative ethanol-gasoline blends in the EF7 engine were examined for this purpose. An experimental result revealed that E10 produces the most torque compared with other various blended fuels, which was the same as the numerical analysis. Numerical results in GT-Power software revealed that the BP of gasoline was slightly less than that of blended ethanol-gasoline fuels. E15 had the highest rate of production power and the lowest CO and HC emissions among the blended fuels. E10 had a 3.79 % lower SFC than gasoline. The volume efficiency of gasoline was 6.32 %, 1.85 %, and 3.05 % higher than that of E5, E10, and E15, respectively. At 3000 RPM and full load, when E15 emissions were compared to gasoline emissions, CO and HC emissions were reduced by 23.46 % and 44.04 %, respectively, whereas CO2 and NOX emissions increased by 16.03 % and 29.93 %, respectively. Based on the results, E10 and E15 are being offered as alternatives to gasoline as fuels that work just as well as pure gasoline but produce less pollution.