Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
HEAT RELEASE RATE OF A COMPRESSION IGNITION ENGINE FUELED WITH DIESEL OIL AND A DIESEL-STRAIGHT SOYBEAN OIL BLEND
Submission Author:
Nury Audrey Nieto Garzón , SC
Co-Authors:
Edson Bazzo, Amir Antonio Martins Oliveira
Presenter: Nury Audrey Nieto Garzón
doi://10.26678/ABCM.ENCIT2016.CIT2016-0195
Abstract
An experimental and theoretical analysis of the Heat Release Rate (HRR) of a diesel engine fueled with diesel oil and a blend of 50 % v/v of diesel oil and straight soybean oil (SVO) is presented. Fuels were tested on a dynamometer bench with a single cylinder, four strokes, naturally aspired, mechanically driven direct injection, diesel engine with nominal power of 14.7 kW at 2200 rpm. Tests were carried out at 1700, 1800 and 2100 rpm with the mechanical fuel pump open to maximum pumped volume. The mixture containing diesel and soybean oil is preheated before injection to 80 °C. The HRR was obtained from a zero-dimensional model of the combustion chamber, using measured in-cylinder pressure data, geometric parameters of diesel engine, mass of fuel injected, chemical composition of fuel and mass of air admitted to the engine. This model assumed the cylinder content as a homogeneous mixture of air and combustion products in thermodynamic equilibrium at each instant. A triple Wiebe function, characterizing the premixed, diffusive and residual combustion phases, was used to curve fit the HRR for each fuel. The results did not show significant differences between the combustion parameters found for each fuel at the tested speeds, revealing the predominant role of atomization thermo-physical properties in the engine combustion control. The model is limited to the engine and test conditions utilized here, but could be used as a first approximation for the analysis of diesel engines fueled with blends of diesel and soybean oils.
Keywords
compression ignition engine, straight soybean oil, diesel oil, heat release rate, compression ignition engine, straight soybean oil, diesel oil, heat release rate
