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Depleting sources of fossil fuels and environmental issues like air pollution and harmful toxic emissions from the combustion of these fossil fuels have made the search for their potential substitutes essential. Biodiesel is found to be one such widely accepted viable option as seen from literature. In this work, Pongamia oil biodiesel, Bioethanol and Biobutanol have been selected for blending with diesel. The analysis of exergy and energy of varying proportions of Pongamia-Ethanol-Butanol blends and diesel as fuels for a 4-stroke, single-cylinder CI engine has been carried out. Further, based on the formed equations, a computer program has been written to obtain the final output characteristics. Four blends namely, D100 (neat diesel), P50E50 (50:50 Pongamia-Ethanol blend), P45E45Bu10 (45:45:10 Pongamia–Ethanol-Butanol blend), P40E40Bu20 (40:40:20 Pongamia-Ethanol-Butanol blend) have been considered for the analysis. P50E50 blend shows a significant decrease in heat loss due to exhaust gases, net energy loss, destructive availability, and increase in energy efficiency, exhaust availability, and available efficiency output characteristics as compared to neat diesel. Hence, it is concluded to be the best potential replacement for diesel fuel from all the considered blends.

Exergy and energy analysis of 4-stroke single cylinder CI engine using Pongamia-ethanol-butanol fuel blends