Impact of additives on combustion behaviour and performance of a diesel engine powered by diesel-CIME blend: A comparative analysis

Abstract

This study evaluates the effects of blends containing diesel-Calophyllum Inophyllum Methyl Ester (CIME) with additives on the combustion and performance parameters of a diesel engine. In this investigation, the additives identified were propanol and Curcuma longa leaf oil. The engine characteristics were investigated by using 6%, 12%, and 18% (concentration by volume) of propanol and Curcuma longa leaf oil separately with a diesel-CIME blend (CI20). In comparison to diesel, propanol blends showed a lower heat release rate and a lower peak cylinder pressure. An increased proportion of propanol was found to cause significant engine knock at higher compression ratios, and the engine was unable to operate at higher loads while using CI20P18. The propanol blends reported comparable efficiencies compared to diesel. The average BTE of blend CI20P12 was 1.6% greater than that of diesel. The SFCs were seen to be higher for all blends when compared to diesel. 12.8% and 13.9% more average SFCs were recorded for the blends CI20P6 and CI20P12, respectively, than for diesel. In comparison to diesel and CI20, the Curcuma longa leaf oil blended modified blends had lower cylinder pressure, heat release rate, and mean gas temperature, while these modified blends had lower specific fuel consumption than the CI20 blend. The primary aim of this study is to investigate the potential for Calophyllum inophyllum oil, propanol and oil from the rising agricultural waste of Curcuma longa leaves. Experimental evaluation revealed that methyl ester, propanol, and Curcuma longa leaf oil could be effectively used as partial substitutes for diesel. The results of the artificial neural network (ANN) demonstrated a significant connection between the experimental and predicted values for the engine performance parameters.

Keywords

• Calophyllum inophyllum methyl ester
• propanol
• curcuma longa leaf oil
• combustion
• diesel engine
• ANN

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