Effects of mixing system and pilot fuel quality on diesel-biogas dual fuel engine performance.

This paper describes results obtained from CI engine performance running on dual fuel mode at fixed engine speed and four loads, varying the mixing system and pilot fuel quality, associated with fuel composition and cetane number. The experiments were carried out on a power generation diesel engine at 1500 m above sea level, with simulated biogas (60% CH(4)-40% CO(2)) as primary fuel, and diesel and palm oil biodiesel as pilot fuels. Dual fuel engine performance using a naturally aspirated mixing system and diesel as pilot fuel was compared with engine performance attained with a supercharged mixing system and biodiesel as pilot fuel. For all loads evaluated, was possible to achieve full diesel substitution using biogas and biodiesel as power sources. Using the supercharged mixing system combined with biodiesel as pilot fuel, thermal efficiency and substitution of pilot fuel were increased, whereas methane and carbon monoxide emissions were reduced.

[1]  Dimitrios T. Hountalas,et al.  Experimental investigation concerning the effect of natural gas percentage on performance and emissions of a DI dual fuel diesel engine , 2003 .

[2]  G. Nagarajan,et al.  An experimental investigation on hydrogen as a dual fuel for diesel engine system with exhaust gas recirculation technique , 2008 .

[3]  Mohamed Y. E. Selim,et al.  Sensitivity of dual fuel engine combustion and knocking limits to gaseous fuel composition , 2004 .

[4]  Mohamed Y. E. Selim,et al.  Improving the performance of dual fuel engines running on natural gas/LPG by using pilot fuel derived from jojoba seeds , 2008 .

[5]  Diana D. Brehob,et al.  Analysis of Knock in a Dual-Fuel Engine , 1992 .

[6]  O. A. Badr,et al.  Effect of pilot fuel quantity on the performance of a dual fuel engine , 1999 .

[7]  R. K. Saray,et al.  Comparison of thermal and radical effects of EGR gases on combustion process in dual fuel engines at part loads , 2007 .

[8]  Aiyagari Ramesh,et al.  Experimental Investigation of the Factors Affecting the Performance of a LPG - Diesel Dual Fuel Engine , 1999 .

[9]  M. Selim.  Effect of engine parameters and gaseous fuel type on the cyclic variability of dual fuel engines , 2005 .

[10]  O. Le Corre,et al.  Characterisation of a Syngas-Diesel Fuelled CI Engine , 2005 .

[11]  Aiyagari Ramesh,et al.  Effect of Intake Air Temperature and Pilot Fuel Quantity on the Combustion Characteristics of a LPG Diesel Dual Fuel Engine , 1998 .

[12]  Ghazi A. Karim,et al.  An examination of the flame spread limits in a dual fuel engine , 1999 .

[13]  M. Masood,et al.  Computer simulation of hydrogen–diesel dual fuel exhaust gas emissions with experimental verification , 2008 .

[14]  O. A. Badr,et al.  Effect of injection timing on the performance of a dual fuel engine , 2002 .

[15]  John B. Heywood,et al.  Internal combustion engine fundamentals , 1988 .

[16]  Yu Zhang,et al.  Combustion Analysis of Esters of Soybean Oil in a Diesel Engine , 1996 .

[17]  Aiyagari Ramesh,et al.  Experimental Investigations on a Jatropha Oil Methanol Dual Fuel Engine , 2001 .

[18]  G. Karim,et al.  The Effects of Pilot Fuel Quality on Dual Fuel Engine Ignition Delay , 1998 .

[19]  Mohand Tazerout,et al.  Characterization of the LPG - Diesel Dual Fuel Combustion , 2001 .

[20]  Biosystems E Ngineering.  Long-term operation of a small biogas/diesel dual-fuel engine for on-farm electricity generation , 2007 .

[21]  A Henham,et al.  Combustion of simulated biogas in a dual-fuel diesel engine , 1998 .

[22]  H. A. Soliman,et al.  Effects of diluent admissions and intake air temperature in exhaust gas recirculation on the emissions of an indirect injection dual fuel engine , 2001 .

[23]  G. Karim.  A review of combustion processes in the dual fuel engine—The gas diesel engine , 1980 .

[24]  G. A. Karim,et al.  An Analytical Examination of the Effects of Exhaust Gas Recirculation on the Compression Ignition Process of Engines Fuelled with Gaseous Fuels , 1996 .

[25]  Phan Minh Duc,et al.  Study on biogas premixed charge diesel dual fuelled engine , 2007 .

[26]  Mohamed Y. E. Selim,et al.  Effect of exhaust gas recirculation on some combustion characteristics of dual fuel engine , 2003 .

[27]  A. Bilcan,et al.  Thermal efficiency and environmental performances of a biogas‐diesel stationary engine , 2003, Environmental technology.

[28]  O. M. I. Nwafor,et al.  Effect of choice of pilot fuel on the performance of natural gas in diesel engines , 2000 .

[29]  Hideaki Kobayashi,et al.  Effects of CO2 dilution on turbulent premixed flames at high pressure and high temperature , 2007 .

[30]  O. M. I. Nwafor,et al.  Effect of advanced injection timing on emission characteristics of diesel engine running on natural gas , 2007 .

[31]  P. G. Hill,et al.  Analysis of Combustion in Diesel Engines Fueled by Directly Injected Natural Gas , 2000 .

[32]  Antonio Paolo Carlucci,et al.  Experimental investigation and combustion analysis of a direct injection dual-fuel diesel–natural gas engine , 2008 .

[33]  Margaret J. Robertson,et al.  Design and Analysis of Experiments , 2006, Handbook of statistics.