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

Year 2018, Volume: 21 Issue: 1, 16 - 25, 01.03.2018

Salman Abdu Ahmed , Song Zhou Yuangqing Zhu

https://doi.org/10.5541/ijot.316300

Cited By: 6

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 (BSFC), and gaseous emissions of nitrogen oxides (NOX),
hydrocarbons (HC), carbon monoxide (CO) and carbon dioxide (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 (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 (BTE) in dual fuel mode when
compared to those of the corresponding diesel engine.

Keywords

Diesel, dual-fuel engine, natural gas, engine performance

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