INVESTIGATION OF DIESEL ENGINES PERFORMANCE USING BLENDS OF WASTE VEGETABLE OILS

Abstract

In the present time, the human is facing two essential problems.These problems are the depletion and the environmental pouution of the fossil oil.Vegetable oils after some chemical treatments may be used as an alternative to solve partially these problems, since these oils are renewable and environmental iiiendly.Biofuel extracted l?om vegetable oils is considered as a renewable alternative diesel engine fuel.In this study, an experimental investigation on the performance of a direct injection diesel engine is performed.Five blends of waste palm kernel oil (WPKO) with diesel fuel are used (B5-WPKO, BIO-WPKO, B20-WPKO, B30-WPKO and B40-WPKO).Another three blends of waste sunflower oil (WSFO) (B20-WSFO, B30-WSFO and B40-WSFO) with diesel fuel ( D ! ? ) are employed.Because of the great effect of the fuel viscosity on atomhtion process and combustion, the WPKO and WSFO are preheated to approach diesel fuel viscosity.