Effect of methane augmentations on engine performance and emissions.

Automobile numbers are increasing day by day that demand more fuel and produce more emission. In addition, petroleum sources are limited in nature and emission norms are tightening day by day. Those scenarios are motivating the researcher to find non-petroleum clean energy source. Gaseous fuel supplementation is helpful in obtaining the above stated objective. In this study, methane gas supplementation has done to diesel engine. The investigation was carried out to analyze the performance and emission of CI engine using 0–75% substitution of diesel indicated power by methane energy in dual fuel mode at varying load (25%, 50% and 75%). The result shows that brake thermal efficiency (BTE) and relative air fuel ratio decreases with methane energy share (MES), while unaccounted heat loss increases. Here, a comparison of NO and NO 2 emissions have been presented to investigate the non-thermal effect of CH 4 on NO x emission. Combined reduction in nitrogen oxide and soot emission makes the outcomes of this study more suitable to implement for achieving the strict emission norms. Hence, CH 4 augmentation is beneficial at mid and higher load conditions with lower emissions and energy consumption. [ABSTRACT FROM AUTHOR]