Experimental investigation and multi criteria optimization of dual fuel combustion of 1 hexanol with diesel and biodiesel in a diesel engine

Abstract

The population growth requires a rapid change in the transportation sector by implementing modern technologies in automobile industries. To fulfil the energy requirement and to convert the available fossil fuel into useful energy effectively, diesel engines are the good choice because of their better thermal efficiency compared to gasoline engines. The diesel engines are also employed for various heavy-duty operations like marine, locomotives, and power plants. More than 80% of vehicles are utilizing diesel engines for transportation of both passenger and goods because of its robust engine construction which has capability to carry heavy loads. The lean burn operations (excess air) of diesel engines emit lower CO and HC emissions compared to gasoline engines. Moreover, use of diesel engines is inevitable for both the on-road transportation and off-road applications like agriculture and other power productions. The advantage of using diesel fuel over petrol is its lower brake specific fuel consumption. However, the major drawback of diesel fuel is its non-renewable nature. Due to its enormous and incessant usage, the fossil-based diesel resources start depleting over the years. Moreover, diesel engines emit higher oxides of nitrogen (NOx) and soot emissions due to its nature of combustion. In order to address these problems, approaches like modifications in engines and use of alternative fuels are explored. Various technologies in combustion systems like Homogeneous Charge Compression Ignition (HCCI), Premixed Charge Compression Ignition (PCCI) and Reactivity Controlled Compression Ignition (RCCI), Exhaust Gas Recirculation (EGR) and Electronic Fuel Ignition (EFI) which uses sensors and actuators to inject correct quantity of fuel are being explored for realizing the optimized performance and emission characteristics of the engines. In order to mitigate the usage of diesel and its associated emissions, the use of alternative biofuels is also attempted. newline