Theoretical performance on energy and exergy analysis of methyl esters of rubber seed oil fuelled on supercharged VCR engine

Bio-fuels derived from sustainable resources provide reliable energy for future needs in a wide range of industries. In this work, biodiesel made using renewable rubber seed oil is transesterified and suitably mixed with diesel at 20%, 40%, 60% and 80% in single-cylinder four-stroke direct injection, variable compression ratio engine. Experiments are conducted by changing supercharging as 1 atm., 1.25 and 1.5 bar pressure measured at inlet air pipe with an average compression ratio of 20 at fixed speed of 1500 rpm at 80% load for various fuel blends. The effect of supercharging reduces the cooling water loss by 4.11%, and unaccounted losses slightly increase by 2.64% for averaged fuel blends and compression ratio. The shaft energy improves by 4.31%, and exhaust gas energy flow decreases by 5.18% for the same operating conditions. The improved BTE by 2.99% with reduction in BSEC of 7.54% are witnessed with supercharging. Peak pressure rises by 3.75% with supercharging but slight drop in heat release rate observed by 4.46% for same operating conditions. The entropy generation and exhaust gas availability decrease by 18.56% and 4.86% with supercharging. The destructed irreversibility and cooling water availability were declined by 11.97% and 22.51% with supercharging. The exhaust emissions of CO and HC emissions were found to be decreased by 10.26% and 21.41% with supercharging compared with diesel. The second law efficiency was improved by 9.51% with supercharging for averaged fuel blends and compression ratio.