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    Engine performance and emissions characteristics of a diesel engine fueled with diesel-biodiesel-bioethanol emulsions

    Access Status
    Fulltext not available
    Authors
    Tan, Yie Hua
    Abdullah, M.O.
    Nolasco-Hipolito, C.
    Zauzi, N.S.A.
    Abdullah, G.W.
    Date
    2017
    Type
    Journal Article
    
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    Citation
    Tan, Y.H. and Abdullah, M.O. and Nolasco-Hipolito, C. and Zauzi, N.S.A. and Abdullah, G.W. 2017. Engine performance and emissions characteristics of a diesel engine fueled with diesel-biodiesel-bioethanol emulsions. Energy Conversion and Management. 132: pp. 54-64.
    Source Title
    Energy Conversion and Management
    DOI
    10.1016/j.enconman.2016.11.013
    ISSN
    0196-8904
    Faculty
    Curtin International
    School
    Curtin International
    URI
    http://hdl.handle.net/20.500.11937/77493
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 Elsevier Ltd In this research work, the experimental investigation of the effect of diesel-biodiesel-bioethanol emulsion fuels on combustion, performance and emission of a direct injection (DI) diesel engine are reported. Four kind of emulsion fuels were employed: B (diesel-80%, biodiesel-20% by volume), C (diesel-80%, biodiesel-15%, bioethanol-5%), D (diesel-80%, biodiesel-10%, bioethanol-10%) and E (diesel-80%, biodiesel-5%, bioethanol-15%) to compare its’ performance with the conventional diesel, A. These emulsion fuels were prepared by mechanical homogenizer machine with the help of Tween 80 (1% v/v) and Span 80 (0.5% v/v) as surfactants. The emulsion characteristics were determined by optical electron microscope, emulsification stability test, FTIR, and the physiochemical properties of the emulsion fuels which were all done by following ASTM test methods. The prepared emulsion fuels were then tested in diesel engine test bed to obtain engine performance and exhaust emissions. All the engine experiments were conducted with engine speeds varying from 1600 to 2400 rpm. The results showed the heating value and density of the emulsion fuels decrease as the bioethanol content in the blend increases. The total heating value of the diesel-biodiesel-bioethanol fuels were averagely 21% higher than the total heating value of the pure biodiesel and slightly lower (2%) than diesel fuel. The engine power, torque and exhaust gas temperature were reduced when using emulsion fuels. The brake specific fuel consumption (BSFC) for the emulsion fuels were observed to be higher in comparison to diesel, A. The CO2 (carbon dioxide) and CO (carbon monoxide) emissions were reported to be lower than diesel oil. The effect of using emulsion fuels decreased the NOx (nitrogen oxides) emissions at medium engine speeds, i.e. approximately 30.0%. Lesser NOx emission was attributed by the reduction of cetane number of the diesel-biodiesel-bioethanol emulsion fuels’ cetane number as the amount of bioethanol increases. However, the emissions of NOx were found to increase gradually at low speed (∼1600 rpm), high load; high speed (∼2400 rpm), medium load conditions. It was found that the combustion performance and emissions of the diesel engine very much depend on the fuel, its emulsion combination types and engine operating conditions.

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