Hasil pembakaran emisi rendah dengan menggunakan bahan api biodiesel berbantukan aliran berpusar

Abstract

Combustion is a major global energy production method. However combustion of biodiesel fuel spray having problems because of poor atomization. Therefore emission reduction in this combustion system is a very important field of study. A combustor for biodiesel fuel which uses curved blade radial flow swirler with single fuel injection was studied by experiment and simulation analysis. The quick fuel-air mixing and the creation of an internal re-circulation zone due to strong the swirl produced stable flame and low NOx emission. Analysis of flow and combustion model was conducted to study the radial swirl combustor using Computational Fluid Dynamics. The results of the study, that combined the realizable ft-e turbulence model with the Eddy Dissipation combustion model, found that the gas emission was recirculated into the toroidal flow core into the main combustion zone. The combustion cross section shows that a strong swirl produced a short and stable flame at distance z/D lower that 40o/o. From experiments, it was found that the NOx emission formation was reduced by 20% when using high swirl compared to low swirl without recirculation zone. Other than that, the formation of other emissions such as Carbon Monoxide (CO) and unburned Hydro Carbon (HC) are low within the central recirculation zone for all high swirl flows. In addition, with pre-heating of intake air, the CO and HC emission were reduced by 23% compared to combustion without pre-heating. The measurement of emission also showed that excess Oxygen was lower with high swirl combustion compared to low swirl one. This proved that the combustion efficiency is higher with high swirl flow. The result of this lesearch could be used to design new generation combustor that is sustainable and environmental friendlv.