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Performance, emission and combustion characteristic of a multicylinder DI diesel engine running on diesel–ethanol–biodiesel blends of high ethanol content

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  • Hulwan, Dattatray Bapu
  • Joshi, Satishchandra V.

Abstract

Feasibility of using high percentage of ethanol in diesel–ethanol blends, with biodiesel as a co-solvent and properties enhancer has been investigated. The blends tested are D70/E20/B10 (blend A), D50/E30/B20 (blend B) D50/E40/B10 (blend C), and Diesel (D100). The blends are prepared to get maximum percentage of oxygen content but keeping important properties such as density, viscosity and Cetane index within acceptable limits. Experiments are conducted on a multicylinder, DI diesel engine, whose original injection timing was 13° CA BTDC. The engine did not run on blends B and C at this injection timing and it was required to advance timing to 18° and 21° CA BTDC to enable the use of blends B and C respectively. However advancing injection timing almost doubled the NO emissions and increased peak firing pressure. The P–θ and net heat release diagrams shows that the combustion process of these blends delayed at low loads but approaches to the diesel fuel at high loads. The comparison of blend results with baseline diesel showed that brake specific fuel consumption increased considerably, thermal efficiency improved slightly, smoke opacity reduced remarkably at high loads. NO variation depends on operating conditions while CO emissions drastically increased at low loads. Blend B which replaced 50% diesel and having oxygen content up to 12.21% by weight has given satisfactory performance for steady state running mode up to 1600 RPM however, it does not showed any benefit on peak smoke emission during free acceleration test.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:appene:v:88:y:2011:i:12:p:5042-5055
    DOI: 10.1016/j.apenergy.2011.07.008
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    References listed on IDEAS

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    1. 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.
    2. Nwafor, O.M.I. & Rice, G. & Ogbonna, A.I., 2000. "Effect of advanced injection timing on the performance of rapeseed oil in diesel engines," Renewable Energy, Elsevier, vol. 21(3), pages 433-444.
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