Investigation of Diesel Engine Performance Using Biodiesel Fuel and Biogas in Dual Fuel Mode

Abstract

Biodiesel and biogas as the renewable energy will give the advantages for reducing fossil fuel dependency. In addition, biogas is easy to adjust as dual fuel in the diesel engine without major modification. However, the biogas mainly contents are methane (CH₄) and carbon dioxide (CO₂). The effect of methane content ratio on combustion pressure, thermal efficiency, specific fuel consumption and biodiesel fuel replacement investigated under varied torque with constant engine speed. The maximum 2.1% thermal efficiency improvement with 27.4% biodiesel fuel replacement has achieved. Overall the adjustment of biogas in the absence of knocking was possible for all load variation and methane content ratio, considering the thermal efficiency using dual fuel mode recommended in the high load condition.