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Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol–diesel fuel blends

Author

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  • Rakopoulos, C.D.
  • Antonopoulos, K.A.
  • Rakopoulos, D.C.

Abstract

An experimental study is conducted to evaluate the effects of using blends of ethanol with conventional diesel fuel, with 5%, 10% and 15% (by vol.) ethanol, on the combustion and emissions of a standard, fully instrumented, four-stroke, high-speed, direct injection (HSDI), ‘Hydra’ diesel engine located at the authors’ laboratory. The tests are conducted using each of the above fuel blends or neat diesel fuel, with the engine working at a speed of 2000rpm and at four different loads. In each test, combustion chamber and fuel injection pressure diagrams are obtained using a specially developed, high-speed, data acquisition and processing system. A heat release analysis of the experimentally obtained cylinder pressure diagrams is developed and used, with the pertinent application of the energy and state equations. From the analysis results, plots of the history in the combustion chamber of the gross heat release rate and other related parameters reveal some very interesting features, which shed light on the combustion mechanism when using these blends. Moreover, for each test, volumetric fuel consumption, exhaust smokiness and exhaust regulated gas emissions are measured. The differences in the performance and exhaust emission parameters from the baseline operation of the diesel engine, i.e., when working with neat diesel fuel, are determined and compared. The heat release analysis results for the relevant combustion mechanism, combined with the widely differing physical and chemical properties of the ethanol against those for the diesel fuel, are used to aid the correct interpretation of the observed engine behavior.

Suggested Citation

  • Rakopoulos, C.D. & Antonopoulos, K.A. & Rakopoulos, D.C., 2007. "Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol–diesel fuel blends," Energy, Elsevier, vol. 32(10), pages 1791-1808.
    • Handle: RePEc:eee:energy:v:32:y:2007:i:10:p:1791-1808
    DOI: 10.1016/j.energy.2007.03.005
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    References listed on IDEAS

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    1. Kouremenos, D.A. & Rakopoulos, C.D. & Kotsiopoulos, P., 1990. "Comparative performance and emission studies for vaporized diesel fuel and gasoline as supplements in swirl-chamber diesel engines," Energy, Elsevier, vol. 15(12), pages 1153-1160.
    2. Rakopoulos, C.D., 1992. "Olive oil as a fuel supplement in DI and IDI diesel engines," Energy, Elsevier, vol. 17(8), pages 787-790.
    3. Rakopoulos, C.D., 1992. "Comparative performance and emission studies when using olive oil as a fuel supplement in DI and IDI diesel engines," Renewable Energy, Elsevier, vol. 2(3), pages 327-331.
    4. Rakopoulos, C.D & Kyritsis, D.C, 2001. "Comparative second-law analysis of internal combustion engine operation for methane, methanol, and dodecane fuels," Energy, Elsevier, vol. 26(7), pages 705-722.
    5. Li, De-gang & Zhen, Huang & Xingcai, Lŭ & Wu-gao, Zhang & Jian-guang, Yang, 2005. "Physico-chemical properties of ethanol–diesel blend fuel and its effect on performance and emissions of diesel engines," Renewable Energy, Elsevier, vol. 30(6), pages 967-976.
    Full references (including those not matched with items on IDEAS)

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