Experimental Investigation of Biodiesel and Acetylene Dual Fuel Use in a Diesel Engine with RCCI Approach

Abstract

Diesel engines are widely used in road, railway and sea transportation and electricity generation because they can provide high torque with low fuel consumption. Today, the increase in the cost of petroleum-based diesel fuel and the decrease in petroleum reserves day by day have brought biodiesel to the fore as an alternative diesel fuel. Biodiesel also has a limited area of use due to its cost and low performance values. In addition, very high NOx emission and feedstock problem can be added to these disadvantages. In this study, it is aimed to both reduce the harm of waste oil to nature and solve the feedstock problem by choosing waste cooking oil (from university cafeterias) as a biodiesel raw material. In addition, 30% acetylene was added to meet the engine's energy need as a dual fuel technology in order to increase the preference for the use of biodiesel in diesel engines. The experiments were carried out at 4 different engine loads (15 Nm, 30 Nm, 45 Nm and 60 Nm) and a 3-cylinder naturally aspirated diesel engine. According to the test results obtained, biodiesel fuel consumption was reduced by 30% with the addition of 10% acetylene. In addition, reductions of 6.85%, 10.41%, 8.1% and 5.61%, respectively, were detected in CO, HC, NOx emission and smoke opacity values.