Abstract

While providing solutions to the emission of greenhouse gases through the use of biodiesels, several concerns have also arisen from the compatibility of such fuels with conventional diesel engines. The aim of this research is to model and simulate biodiesel and blends from Jatropha-Neem combination in Compression Ignition Engines. This article describes how a 4-cylinder compression ignition engine model was developed in Diesel R-K software interface with acknowledged specifications of an existing engine test bed using the Diesel R-K modeling software. Computed fuel properties of biodiesel and blends from Jatropha-Neem hybrid oil were obtained, their values were fed into simulated engine model. The simulation of engine recital in Diesel R-K established that the biodiesel and blends have properties that are

considerably similar with petro diesel. The simulation of the biodiesel blend data revealed that the highest brake-specific fuel consumption was observed for JN B10, followed by JN B15, and JN B20. The highest brake mean effective pressure was achieved during the simulation of the CI engine performance with JN B100, JN B5 and JN B15 biodiesels correspondingly. The highest air-fuel ratio values were depicted by JN B100, JN B20 and JNB15 in descending order.