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Combustion and emissions characteristics of diesel engine fueled by biodiesel at partial load conditions


  • An, H.
  • Yang, W.M.
  • Chou, S.K.
  • Chua, K.J.


This paper investigated the performance, combustion and emission characteristics of diesel engine fueled by biodiesel at partial load conditions. Experiments were conducted on a common-rail fuel injection diesel engine using ultra low sulfur diesel, biodiesel (B100) and their blend fuels of 10%, 20%, 50% (denoted as B10, B20 and B50 respectively) under various loads. The results show that biodiesel/blend fuels have significant impacts on the engine’s brake specific fuel consumption (BSFC) and brake thermal efficiency (BTE) at partial load conditions. The increase in BSFC for B100 is faster than that of pure diesel with the decrease of engine load. A largest increase of 28.1% in BSFC is found at 10% load. Whereas for BTE, the results show that the use of biodiesel results in a reduced thermal efficiency at lower engine loads and improved thermal efficiency at higher engine loads. Furthermore, the characteristics of carbon monoxide (CO) emissions are also changed at partial load conditions. When running at lower engine loads, the CO emission increases with the increase of biodiesel blend ratio and the decrease of engine speed. However, at higher engine loads, an opposite trend is obtained.

Suggested Citation

  • An, H. & Yang, W.M. & Chou, S.K. & Chua, K.J., 2012. "Combustion and emissions characteristics of diesel engine fueled by biodiesel at partial load conditions," Applied Energy, Elsevier, vol. 99(C), pages 363-371.
  • Handle: RePEc:eee:appene:v:99:y:2012:i:c:p:363-371
    DOI: 10.1016/j.apenergy.2012.05.049

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    References listed on IDEAS

    1. Xue, Jinlin & Grift, Tony E. & Hansen, Alan C., 2011. "Effect of biodiesel on engine performances and emissions," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(2), pages 1098-1116, February.
    2. Macor, A. & Avella, F. & Faedo, D., 2011. "Effects of 30% v/v biodiesel/diesel fuel blend on regulated and unregulated pollutant emissions from diesel engines," Applied Energy, Elsevier, vol. 88(12), pages 4989-5001.
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    5. Hulwan, Dattatray Bapu & Joshi, Satishchandra V., 2011. "Performance, emission and combustion characteristic of a multicylinder DI diesel engine running on diesel–ethanol–biodiesel blends of high ethanol content," Applied Energy, Elsevier, vol. 88(12), pages 5042-5055.
    6. Muralidharan, K. & Vasudevan, D., 2011. "Performance, emission and combustion characteristics of a variable compression ratio engine using methyl esters of waste cooking oil and diesel blends," Applied Energy, Elsevier, vol. 88(11), pages 3959-3968.
    7. Qi, D.H. & Geng, L.M. & Chen, H. & Bian, Y.ZH. & Liu, J. & Ren, X.CH., 2009. "Combustion and performance evaluation of a diesel engine fueled with biodiesel produced from soybean crude oil," Renewable Energy, Elsevier, vol. 34(12), pages 2706-2713.
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    9. Qi, D.H. & Chen, H. & Geng, L.M. & Bian, Y.Z., 2011. "Effect of diethyl ether and ethanol additives on the combustion and emission characteristics of biodiesel-diesel blended fuel engine," Renewable Energy, Elsevier, vol. 36(4), pages 1252-1258.
    10. Ng, Jo-Han & Ng, Hoon Kiat & Gan, Suyin, 2012. "Characterisation of engine-out responses from a light-duty diesel engine fuelled with palm methyl ester (PME)," Applied Energy, Elsevier, vol. 90(1), pages 58-67.
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    Biodiesel; Combustion; Emissions; Partial load;


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