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EFFECT OF EXHAUST GAS RECIRCULATION ON VARIOUS CHARACTERISTICS OF DIESEL ENGINE POWERED BY RUBBER SEED OIL METHYL ESTER BUTANOL BLEND

Vishal V. Patil
BITS Pilani, Goa Campus, Zuarinagar, Goa, India

Ranjit S. Patil
BITS Pilani, Goa Campus, Zuarinagar, Goa, India

DOI: 10.1615/IHMTC-2017.1950
pages 1413-1418

Abstract

In the present study, the various characteristics of a diesel engine powered by rubber seed oil methyl ester-butanol blend (rubber seed oil methyl ester (80%) + n-butanol (20%)) were investigated by varying exhaust gas recirculation percentage in the diesel engine. Experiments were conducted by varying the exhaust gas recirculation percentage such as 5%, 10%, 15%, and 20%. The effect of exhaust gas recirculation (EGR) on various characteristics such as performance, combustion, and emission characteristics of a diesel engine were compared for three fuels such as rubber seed oil methyl ester butanol blend, neat rubber seed oil methyl ester (ROME), and neat diesel. With increase in EGR percentage from 5% to 20%, it is observed that performance characteristics like brake power decreased by 29%, 32%, and 31% and brake thermal efficiency decreased by 26%, 32%, and 31% for ROME-butanol blend, neat ROME, and neat diesel respectively. Brake specific fuel consumption observed to be increasing with increase in EGR percentage in the engine by 63%, 61%, and 54% for ROME-butanol blend, neat ROME, and neat diesel respectively. Emission characteristic like carbon monoxide increases more than two times with an increase in EGR percentage from 5% to 20% for three selected fuels. While carbon dioxide decreased by 25%, 30%, and 30% and nitrogen oxides decreased by 56%, 58%, and 57% for ROME-butanol blend, neat ROME, and neat diesel respectively with an increase in EGR percentage in the engine. Increase in EGR lead to reduction in brake power, brake thermal efficiency, NOx emissions while brake specific fuel consumption was observed to increase.

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