Research on the usability of various oxygenated fuel additives in a spark-ignition engine considering thermodynamic and economic analyses

In this study, thermodynamic and economic analyses of binary fuel blends (E15, EA15, M15, MA15, and T15) using commercial gasoline as fuel and oxygenated fuel additives (ethanol, ethyl acetate, methanol, methyl acetate, and terpineol) at 15% by volume in a spark-ignition engine were performed. Performance and emission tests were carried out at various engine loads at a constant speed of 1500 rpm using commercial gasoline and five different fuel blends. Thermodynamic analyses were carried out on the test data. The augmentation in engine load caused an increase in exergy losses and a decrease in the unit cost of engine power exergy values. Specifically for gasoline fuel, the unit cost of engine power exergy at 25% engine load is 1.99 times higher than at 100% load. In fuel blends, the pump price of each fuel affects the fuel cost rate. Exergy efficiency in fuel blends increases with increasing engine load. The highest exergy efficiency is 19.58% for gasoline fuel at 100% engine load. It is 15.95% for M15 fuel at the same load. The exergy values of G100 and T15 fuel were closest to each other and T15 offered better energetic and exergetic performance than the other binary blends.

Automated summary

Thermodynamic and economic analyses were conducted on binary fuel blends (E15, EA15, M15, MA15, and T15) in a spark-ignition engine using commercial gasoline and oxygenated fuel additives. Performance and emission tests were carried out at various engine loads. Results showed that increasing engine load led to higher exergy losses and decreased unit cost of engine power exergy values. The pump price of each fuel blend affected the fuel cost rate. Exergy efficiency in fuel blends increased with increasing engine load, with the highest efficiency observed for gasoline fuel at 100% engine load. The T15 blend exhibited better energetic and exergetic performance compared to other binary blends.