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Investigating Combustion Process of N-Butanol-Diesel Blends in a Diesel Engine with Variable Compression Ratio

Author

Listed:
  • György Szabados

    (Doctoral School of Multidisciplinary Sciences, Széchenyi István University, Egyetem tér 1, 9026 Győr, Hungary)

  • Kristóf Lukács

    (Department of Energy Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, Hungary)

  • Ákos Bereczky

    (Department of Energy Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3, 1111 Budapest, Hungary)

Abstract

The search for alternative fuels for internal combustion engines is ongoing. Among the alternatives, plant-based fuels can also be mentioned. Alcohol is not a common fuel for diesel engines because the physical and chemical properties of the alcohols are closer to those of gasoline. In our research, the combustion properties of diesel-n-butanol mixtures have been investigated to obtain results on the effect of butanol blending on combustion. Among the combustion properties, ignition delay, in-cylinder pressure, and heat release rate can be mentioned. They have been observed under different compression conditions on an engine on which the compression ratio can be adjusted. The method used was a quite simple one, so the speed of the engine was set to a constant 900 rpm without load, while three compression ratios (19.92, 15.27, and 12.53) were adjusted with a fuel flow rate of 13 mL/min and the pre-injection angle of 18° BTDC. Blending butanol into the investigated fuel does not significantly affect maximal values of indicated pressure, while much more effect on the pressure rising rate can be detected. Furthermore, heat release rate and ignition delay increased at every compression ratio investigated. Despite the low blending rates of butanol in the mixtures, butanol significantly affects the combustion parameters, especially at high compression ratios.

Suggested Citation

  • György Szabados & Kristóf Lukács & Ákos Bereczky, 2021. "Investigating Combustion Process of N-Butanol-Diesel Blends in a Diesel Engine with Variable Compression Ratio," Clean Technol., MDPI, vol. 3(3), pages 1-11, August.
    • Handle: RePEc:gam:jcltec:v:3:y:2021:i:3:p:37-628:d:618367
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    References listed on IDEAS

    as
    1. Choi, Byungchul & Jiang, Xiaolong & Kim, Young Kwon & Jung, Gilsung & Lee, Chunhwan & Choi, Inchul & Song, Chi Sung, 2015. "Effect of diesel fuel blend with n-butanol on the emission of a turbocharged common rail direct injection diesel engine," Applied Energy, Elsevier, vol. 146(C), pages 20-28.
    2. Merola, S.S. & Tornatore, C. & Iannuzzi, S.E. & Marchitto, L. & Valentino, G., 2014. "Combustion process investigation in a high speed diesel engine fuelled with n-butanol diesel blend by conventional methods and optical diagnostics," Renewable Energy, Elsevier, vol. 64(C), pages 225-237.
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