Performance of cycle diesel engine using Biodiesel of olive oil (B100)

Abstract

Biodiesel is a renewable fuel derived from vegetable oils used in diesel engines, in any proportion with petroleum diesel, or pure. It is produced by chemical processes, usually by transesterification, in which the glycerin is removed. The objective of this study was to compare the performance of a four stroke, four cylinder diesel cycle engines using either olive (B100) biodiesel oil or diesel oil. The following parameters were analyzed: effective and reduced power, torque, specific and hourly fuel consumption, thermo-mechanical and volumetric efficiency. Analysis of variance was performed on a completely randomized design with treatments in factorial and the Tukey test applied at the level of 5%. Five rotation speeds were researched in four replications (650, 570, 490, 410, 320 and 240 rpm). The engine fed with biodiesel presented more satisfactory results for torque, reduced power and specific and hourly consumptions than that fed with fossil diesel.Index terms: Alternative fuel, energy efficiency, combustion engine. RESUMOBiodiesel é um combustível renovável derivado de óleos vegetais, usado em motores de ciclo diesel, em qualquer proporção com o diesel mineral, ou puro. É produzido por meio de processos químicos, normalmente por transesterificação, no qual é removida a glicerina. Este trabalho foi realizado com o objetivo de avaliar o desempenho de um motor de ciclo diesel quatro tempos e quatro cilindros, utilizando biodiesel de óleo de oliva (B100), em comparação ao óleo diesel. Foram analisados os parâmetros: potência efetiva e reduzida, torque, consumo específico e energético de combustível, eficiência termomecânica e volumétrica. Foi instalado um ensaio com delineamento inteiramente casualizado (DIC) em esquema fatorial, realizada análise de variância e aplicado teste de Tukey, a 5%. Foram pesquisados cinco níveis de rotação em quatro repetições (650, 570, 490, 410, 320 e 240 rpm). O motor alimentado com biodiesel de oliva apresentou torque, potencia reduzida e consumos especifico e horário com resultados mais satisfatórios que o diesel fóssil. Termos para indexação:Combustível alternativo, eficiência energética, motor de combustão.

A Study on Utilization of High-Ratio Biodiesel and Pure Biodiesel in Advanced Vehicle Technologies

“…For the urban cycle, high cetane number and oxygen content play an important role in NOx formation such that an increase in the ratio of biodiesel led to an increase in NOx emissions. However, comparable results for NOx emissions for diesel fuel, B30 and B50 for both the urban and extra-urban cycles might be due to the increase in gas flow motion in the cylinder as the speed rises during the extra-urban cycle, which causes a faster mixing and shorter ignition delay, leading to a reduction in in-cylinder temperature [7]. Moreover, exhaust gas recirculation (EGR) could also lead to significant NOx reduction during the extra-urban cycle as the ignition could be retarded, which results in a lower adiabatic flame temperature [24].…”

“…CO emissions were high at the beginning of the urban cycle for all fuels due to its cold engine operation condition. Here, CO emissions at the beginning of the cycle could be suppressed as the biodiesel ratio increased due to the oxygen content of biodiesel [3][4][5][6][7][8][9][10][11]. CO emissions during the rest of the cycle were near zero except at the maximum vehicle speed of the extra-urban cycle, which reached 120 km/h, but were still low due to the DOC having reached its optimum ignition temperature [19].…”

“…T Hoang, et al, reported that the utilization of a nanoparticle additive in biodiesel could promote better spray and atomization as well as enhance the combustion process to achieve low exhaust gas emissions and higher thermal efficiency [6]. The use of a high ratio of biodiesel fuel and pure biodiesel could lead to a deterioration in fuel economy and performance due to its higher viscosity [7][8][9]. However, appropriate fuel injection pressure and fuel control strategy could improve B100 penetration, atomization and combustion duration resulting in better performance and fuel consumption of B100 [8,9].…”

“…A number of papers have studied the characteristics of emissions, performance and combustion of high-ratio biodiesel fuel and pure diesel fuel. The performance and emissions characteristics of biodiesel engines are mainly determined by engine type and its settings, engine emissions control technologies, testing methodology and biodiesel resources [1,[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. However, there is a lack of studies investigating the impact of high-ratio biodiesel blends fuel and pure biodiesel (B100) on the performance and emissions of advanced vehicle technologies.…”

Engine performance and emission of biodiesel fuel prepared from different Ukrainian natural oils

“…Rising prices, decrease of fossil fuels resources, and environmental advantages have created great interest on alternative sources of fuels, for example, biodiesel (Knothe et al 2010;Atabani et al 2012;Godwin et al 2017). The various studies have been carried out using lot of natural oils as feedstock material (Makareviciene and Janulis 2003;Koh and Ghazi 2011;Volpato et al 2012) alcohols such as methanol, ethanol or buthanol (Issariyakul et al 2007, Brunschwig et al 2012 as well as different catalysts, homogeneous ones (sodium/potassium hydroxide, sulfuric acid), and heterogeneous ones including lipases (Li et al 2009;Jegannathan et al 2008).…”