Soot Emission Analysis in Combustion
of Biogas Diesel Dual Fuel Engine
Bui Van Ga1, Bui Thi Minh Tu2
1 Department of Mechanical Engineering of Transport
2 Department of Electronic and Telecommunication
Danang University of Science and Technology
54, Nguyen Luong Bang, Danang, Vietnam
Email: buivanga@dongcobiogas.com
Environmental Science and Sustainable Development, Vol 1, No 2 (2017)
Abstract
Soot emission in biogas diesel dual fuel engine has been analyzed by numerical simulation with 2-stape soot formation model of Magnussen. The result shows that soot formation is mainly occurred in diffusion combustion phase of diesel pilot jet. Soot peak value is proportional to the first peak value of ROHR and it is found at around the same crank angle position with the second peak of ROHR. At a given engine speed and diesel content in the fuel, the highest soot peak value is obtained with slightly rich mixture whereas soot concentration in exhaust gas increases monotonically with increasing equivalence ratio. Increasing diesel content in the fuel increases both soot peak value and soot concentration in exhaust gas. At a given equivalence ratio and diesel content in the fuel, engine speed has a moderate effect on soot formation rate but a significant effect on soot combustion rate. Soot concentration in the exhaust gas is practically vanished as equivalence ratio under 0.98 and 15% diesel content in the fuel. This is the ideal operation regime of biogas diesel dual fuel engine in view of soot emission control.
Keywords: Biogas; Renewable energy; Biogas-diesel dual fuel engine; Soot emission; Magnussen model
Full Text:
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