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Energies 2015, 8(4), 3047-3057; doi:10.3390/en8043047

Combustion Analysis of a Diesel Engine Running on Different Biodiesel Blends

Department of Engineering "Enzo Ferrari", University of Modena and Reggio Emilia, Via Vivarelli 10, 41125 Modena, Italy
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Academic Editor: Tariq Al-Shemmeri
Received: 13 February 2015 / Revised: 20 March 2015 / Accepted: 27 March 2015 / Published: 20 April 2015
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Abstract

Rape-seed biodiesel is an interesting option to address the problem of decreasing availability of conventional fossil fuels, as well as to reduce the CO2 emissions of internal combustion engines. The present paper describes an experimental campaign carried out on a current production 4-cylinder, 4-stroke naturally aspirated diesel engine, running on standard diesel fuel and on three different blends of rape-seed biodiesel (20%-50%-100%). Performance, emissions and in-cylinder pressure traces were measured at full load. It was found that the influence of rape-seed biodiesel in the fuel blend is not constant at each operating condition. However, as the biodiesel content increases, full load performance tends to drop, in particular brake specific fuel consumption (maximum worsening: +18%), while soot emission goes down. The maximum improvement observed in terms of soot concentration is 37.5%, at 1200 rpm. The combustion analysis revealed that the main differences among the fuels occur in the first phase of combustion: the burn rate is slower for biodiesel blends at low speeds, and faster at high. View Full-Text
Keywords: biodiesel; diesel engine; combustion; soot; rapeseed biodiesel; diesel engine; combustion; soot; rapeseed
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Mattarelli, E.; Rinaldini, C.A.; Savioli, T. Combustion Analysis of a Diesel Engine Running on Different Biodiesel Blends. Energies 2015, 8, 3047-3057.

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