Abstract
In this work, the first and second laws of thermodynamic analyses were carried out on Kirloskar direct injection, variable compression ratio (VCR) engine at four different charge air temperatures (CAT) and exhaust gas recirculation (EGR) mode. Performance, emission and combustion characteristics along with exergy analysis of ternary test fuel of 60 % diesel + 30 % bael oil + 10 % diethyl ether (DEE) were performed. Various exergy components are identified and calculated individually with the percentage of engine load at 1500 rpm. When operating the diesel engine with 47 °C CAT, brake thermal efficiency (BTE) is improved to 29.33 %, carbon monoxide (CO), hydrocarbon (HC), and emissions have been reduced by 8.57 %, 4.28 % and 6.01 % at peak engine load. The oxides of nitrogen (NOx) have been reduced by 20.12 % at 100 % engine load for 30 % EGR mode. The maximum exergy efficiency of 54.61 % has been observed at full engine load for the 47 °C CAT.
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