Study on the performance of envo diesel in a combustion system

Abstract

Depletion of fossil fuel, environmental pollutions and increasing fuel prices has led many countries seeking for fossil fuel substitute. The objective of this study is to present the combustion performance of an oil burner system using Envo-diesel. Palm oil used in this study is a blend of diesel and palm oil called Envo-diesel. The experiment was conducted using E5, E10, E15, E20 and E25 as fuel. The physical properties such as surface tension, kinematics viscosity, density and calorific value were determined. All fuel blends were investigated using three different types of nozzle which consists of different fuel mass flow rate. The performance of burner system using Envo-diesel is based on its temperature profile and emissions generated such as nitrous oxide (NOx) and carbon monoxide (CO). NOx is highest at lean mixture and reduce when the equivalent ratio until the rich mixture, and for CO, at lean mixture it was very low than at rich mixture. It can concluded the high content of palm oil in the blends increases its viscosity, surface tension and density and hence lower the value of emission. The high content of palm oil in the blend will also decrease the calorific value, the temperature for each blends also decrease. The example result for NOx at equivalent ratio 0.8 the percentage increment for palm oil blend compared to diesel decreased around 13% for E5, and other emission for CO for equivalent ratio 1.4, the percentage increment for palm oil blends compared to diesel was decreased around 3% for E5. The outcome of this study successfully fulfilled the scope and the objectives set earlier.