DefinePK

Abstract

Now a days biodiesel fuels are gaining more attraction as promising alternative and substitute fuel resource in place of petroleum diesel because of lower net emissions. The characteristics of biodiesel fueled existing diesel engines are greatly affected by the combustion behavior. The present work is focused on investigation of combustion characteristics of diesel engine fueled with biodiesel derived from waste chicken fat. The experimental investigation was conducted in single cylinder constant speed (1500 rpm) stationery diesel engine at full load condition fueled with neat biodiesel and blends with diesel. Preheated biodiesel was also used to study the combustion behavior of the fuel. The experimental results revealed that as compared to diesel, biodiesel has early start of combustion and shorter delay period. More oxygen content, higher cetane number and lower compressibility of biodiesel have been identified as main reasons for this advancement of combustion and reduced delay period. It is also observed that the heat release rate of biodiesel in both premixed and diffused combustion is different that of diesel. Lower volatility, higher density, higher viscosity, lower calorific value and shorter delay period of the biodiesel are the main reasons for its changes in combustion behavior.