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Study on rapeseed oil as alternative fuel for a single-cylinder diesel engine

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  • He, Y
  • Bao, Y.D

Abstract

This study was undertaken to provide knowledge necessary for raising the thermal efficiency of mixed oil composed of rapeseed oil and conventional diesel oil and for improving the performance of an engine fuelled by the mixture. The experimental results obtained showed that a mixing ratio of 30% rapeseed oil and 70% diesel oil was practically optimal in ensuring relatively high thermal efficiency of engine as well as homogeneity and stability of the oil mixture. Method of quadratic regressive orthogonal design test method was adopted in experiment designed to examine the dependence of specific fuel consumption on four adjustable working parameters when the above –mentioned oil mixture was used. These parameters were: intake-valve-closing angle (α), exhaust-valve-opening angle (β), fuel-delivering angle (θ) and injection pressure (P, in 104 Pa). Relationship between these parameters and specific fuel consumption was analyzed under two typical operating conditions and mathematical equations characterizing the relationship were formulated. The equation of specific fuel consumption derived from the regressive test under each operating condition was set as the objective function and the ranges for the four adjustable working parameters were the given constraint condition. Models of non-linear programming were then constructed. Computer aided optimization of the working parameters for 30:70 rapeseed oil/diesel oil mixed fuel was achieved. It was concluded that the predominant factor affecting the specific fuel consumption was fuel-delivering angle θ, the approximate optimal value of which, in this specific case, was 2–3 degrees in advance of that for engine fuelled by pure diesel oil. The experimental results also provided useful reference material for selection of the most preferable combination of working parameters.

Suggested Citation

  • He, Y & Bao, Y.D, 2003. "Study on rapeseed oil as alternative fuel for a single-cylinder diesel engine," Renewable Energy, Elsevier, vol. 28(9), pages 1447-1453.
    • Handle: RePEc:eee:renene:v:28:y:2003:i:9:p:1447-1453
    DOI: 10.1016/S0960-1481(02)00223-9
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    Cited by:

    1. Misra, R.D. & Murthy, M.S., 2010. "Straight vegetable oils usage in a compression ignition engine--A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(9), pages 3005-3013, December.
    2. Xing, Shiyou & Fu, Junying & Li, Ming & Yang, Gaixiu & Lv, Pengmei, 2024. "Emerging catalysis in solvent-free hydrodeoxygenation of waste lipids under mild conditions: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 200(C).
    3. Grau, Baquero & Bernat, Esteban & Rita, Puig & Jordi-Roger, Riba & Antoni, Rius, 2013. "Environmental life cycle assessment of rapeseed straight vegetable oil as self-supply agricultural biofuel," Renewable Energy, Elsevier, vol. 50(C), pages 142-149.
    4. Altun, Şehmus & Bulut, Hüsamettin & Öner, Cengiz, 2008. "The comparison of engine performance and exhaust emission characteristics of sesame oil–diesel fuel mixture with diesel fuel in a direct injection diesel engine," Renewable Energy, Elsevier, vol. 33(8), pages 1791-1795.
    5. Saleh, H.E., 2009. "Effect of exhaust gas recirculation on diesel engine nitrogen oxide reduction operating with jojoba methyl ester," Renewable Energy, Elsevier, vol. 34(10), pages 2178-2186.
    6. Labeckas, Gvidonas & Slavinskas, Stasys, 2006. "Performance of direct-injection off-road diesel engine on rapeseed oil," Renewable Energy, Elsevier, vol. 31(6), pages 849-863.

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