THERMODYNAMIC SIMULATION AND EXPERIMENTAL TESTS OF DIESEL ENGINE USING DIFFERENT BLENDS OF DIESEL OIL AND BIODIESEL

摘要

In the present energy scenario, there is an increase in blends of diesel oil and biodiesel research asalternative fuels for internal combustion engines. In Brazil, the soy bean and the palm oil biodiesels are beenproduced for this purpose. When those fuel blends are used as a substitute for diesel oil, it’s highly essential tounderstand the parameters that affect the operational phases of the engine and results in performance modificationand emissions. The biodiesel properties depend on the type of the vegetable oil used in the production process.Experimental analyses of the engine with various fuel blends require much effort, time and consequently greatamount of money. Hence, a thermodynamic model of the engine was developed to analyze the performancecharacteristics of the engine fueled with those different blends. The present work presents a thermodynamicsimulation (zero-dimensional) of a single cylinder Diesel Engine, working with different blends of diesel andbiodiesel. The engine simulator is validated in a test bench using a single cylinder engine. Following thus, anexplanation of the problem and the aims are exposed. The whole thermodynamic formulation model is defined for thecylinder compression, combustion and expansion processes, meaning that intake and exhaust valves are closed.