TY - JOUR
T1 - Influence of properties of various common bio-fuels on the combustion and emission characteristics of high-speed DI (direct injection) diesel engine
T2 - Vegetable oil, bio-diesel, ethanol, n-butanol, diethyl ether
AU - Rakopoulos, Dimitrios C.
AU - Rakopoulos, Constantine D.
AU - Giakoumis, Evangelos G.
AU - Papagiannakis, Roussos G.
AU - Kyritsis, Dimitrios C.
PY - 2014/8/14
Y1 - 2014/8/14
N2 - This work evaluates the influence of properties of various common bio-fuels on the combustion, performance and exhaust emissions of an experimental, single-cylinder, four-stroke, high-speed, DI (direct injection) 'Hydra' diesel engine operated at three different loads. Various blends of diesel fuel with either vegetable oil of cottonseed or its derived (methyl ester) bio-diesel, or ethanol, or n-butanol, or diethyl ether were investigated. Fuel consumption, exhaust gas temperature, and exhaust smoke, NOx (nitrogen oxides), CO (carbon monoxide) and total unburned HC (hydrocarbons) were measured. The differences in combustion, performance and exhaust emissions of those bio-fuels blends from the baseline operation of the diesel engine (with neat diesel fuel) and among themselves are compared. Fuel injection, combustion chamber pressure, and HRR (heat release rate) diagrams reveal interesting features of the combustion mechanisms. These results and the different physical and chemical properties of those bio-fuels are used to aid the interpretation of the observed engine behavior. With increasing percentage of all bio-fuels in the blends, significant reduction of smoke opacity is observed with the exception of the vegetable oil case, reduction of NOx, and mixed behavior for the CO and HC emissions against the corresponding neat diesel fuel case.
AB - This work evaluates the influence of properties of various common bio-fuels on the combustion, performance and exhaust emissions of an experimental, single-cylinder, four-stroke, high-speed, DI (direct injection) 'Hydra' diesel engine operated at three different loads. Various blends of diesel fuel with either vegetable oil of cottonseed or its derived (methyl ester) bio-diesel, or ethanol, or n-butanol, or diethyl ether were investigated. Fuel consumption, exhaust gas temperature, and exhaust smoke, NOx (nitrogen oxides), CO (carbon monoxide) and total unburned HC (hydrocarbons) were measured. The differences in combustion, performance and exhaust emissions of those bio-fuels blends from the baseline operation of the diesel engine (with neat diesel fuel) and among themselves are compared. Fuel injection, combustion chamber pressure, and HRR (heat release rate) diagrams reveal interesting features of the combustion mechanisms. These results and the different physical and chemical properties of those bio-fuels are used to aid the interpretation of the observed engine behavior. With increasing percentage of all bio-fuels in the blends, significant reduction of smoke opacity is observed with the exception of the vegetable oil case, reduction of NOx, and mixed behavior for the CO and HC emissions against the corresponding neat diesel fuel case.
KW - Combustion and emissions
KW - Diethyl ether
KW - Ethanol
KW - High-speed DI (direct injection) diesel
KW - N-Butanol
KW - Vegetable oil and bio-diesel
UR - http://www.scopus.com/inward/record.url?scp=84905719691&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2014.06.032
DO - 10.1016/j.energy.2014.06.032
M3 - Article
AN - SCOPUS:84905719691
SN - 0360-5442
VL - 73
SP - 354
EP - 366
JO - Energy
JF - Energy
ER -