Modeling and prediction of NO_x emission in an LPG–diesel dual‐fuel CI engine

Abstract

Different alternative fuels have been proposed by various researchers in diesel engines in view of increased NO x and particulate emissions. Out of the various methods proposed, dual fueling is one of the most important techniques that helps solve the different operational problems related to diesel engine combustion and emission. In the current study, modeling and predicting the formation of NO x emission in a duel fuel liquefied petroleum gas (LPG)-diesel engine has been undertaken. Simulations have been conducted for various LPG flow rates at different engine loads and the predicted NO x values are compared with the experimental values. The results found that there is a decent agreement between the forecasted and the investigational results, where the average difference is within 13.7%. Furthermore, it is found that minimum NO x emission was observed for an LPG flow rate in the range of 0.4-0.6 kg/h and when the engine is running with 75% loading. K E Y W O R D S crank angle, duel fuel, LPG flow rate, NO x emission, pilot fuel | INTRODUCTIONBetter fuel economy of diesel engines has gained importance over the years to be used as a prime mover in various applications, including the transport sector. The exponential growth of the demand, strict emission norms imposed by the regulatory bodies, and depleting sources of hydrocarbon-based fuels have necessitated the search for alternative fuel. Diesel engines, even How to cite this article: Murthy K, Srinivas VG, Kumar S. Modeling and prediction of NO x emission in an LPG-diesel dual fuel CI engine.

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