Performance and Emission Characteristics Analysis of Dual Fuel Compression Ignition Engine Using Natural Gas and Diesel

Authors : Salman Abdu AHMED, Song ZHOU, Yuangqing ZHU

Pages : 16-25

Doi:10.5541/ijot.316300

View : 13 | Download : 7

Publication Date : 2018-03-01

Article Type : Research Paper

Abstract :The demand for higher output efficiencies, greater specific power output, increased reliability, and ever reduced emissions has been rising. One promising alternative is the use of a gaseous fuel as partial supplement to liquid fuel. In this study, the effects of diesel-natural gas substitution ratios on the engine performance parameters like brake specific fuel consumption insert ignore into journalissuearticles values(BSFC);, and gaseous emissions of nitrogen oxides insert ignore into journalissuearticles values(NOX);, hydrocarbons insert ignore into journalissuearticles values(HC);, carbon monoxide insert ignore into journalissuearticles values(CO); and carbon dioxide insert ignore into journalissuearticles values(CO2); were investigated for natural gas-diesel fuel operation and then compared with the original diesel operation. The engine was modeled with GT-Power computational simulation tool. The diesel fuel was injected into the cylinder while natural gas was injected in to air-intake pipe then compressed together with air. The simulation was carried out at constant engine speed of 1800rpm for four different natural gas fractions insert ignore into journalissuearticles values(15%, 25%, and 50% and 75%);. NOX and CO2 emissions decreased sharply by more than 45% and 50% respectively in dual-fuel mode when compared to only diesel fuel mode. However an increase was observed in CO and HC emissions in dual fuel mode. The results also indicated that higher BSFC and lower brake thermal efficiency insert ignore into journalissuearticles values(BTE); in dual fuel mode when compared to those of the corresponding diesel engine.
Keywords : Diesel, dual fuel engine, natural gas, engine performance