Enhancing Sustainable VCR Engine Operation Using Mahua Oil Methyl Ester with Thermal Barrier Coating

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Abstract
In order to lower hazardous emissions and improve the diesel engine characteristics, there has been a recent push for appropriate alternative fuels and improved performance tactics. In order to analyze the diesel engine behavior with variable compression ratios, the combined effect of alternate fuel and thermal barrier-coated engine crown was studied. Using Mahua Oil Methyl Esters (MOME) with various Compression Ratios (CR) ranging from 17:1, 19:1, and 21:1 at various load circumstances, the performance, emission, and combustion characteristics of the thermal barrier-coated VCR engine were examined and contrasted with those of diesel and non-coated or standard engines. Based on observed results, the adiabatic engine with a higher compression ratio of 21 (CR21-AE-B100) demonstrated the following characteristics: a higher cylinder gas pressure of 61.7 bar, a higher heat release rate of 78.6 J/oCA, a shorter ignition delay period of 9.8 oCA, a maximum brake thermal efficiency of 28.12%, the lowest Brake Specific Fuel Consumption (BSFC) of 0.3423 kg/kW h, a maximum Nitric Oxide (NO) emission of 575 ppm, and lowest smoke opacity of 37.8%.

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