Determination of optimal wet ethanol composition as a fuel in spark ignition engine

Fagundez, Jean Lucca Souza; Sari, Rafael Lago; Mayer, Flávio Dias; Martins, Mario; Salau, Nina Paula Gonçalves

doi:10.1016/j.applthermaleng.2016.10.099

Cited by 32 publications

(13 citation statements)

References 26 publications

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“…Entretanto, para a mistura E80W20, verifica-se o maior valor de eficiência indicada encontrado. Os estudos realizados por Fagundez et al e Lanzanova et al [5,23], apresentam uma condição de operação ótima entre energia gasta e energia produzida para misturas variando seus percentuais de água de 10 a 20%, em conteúdo volumétrico, sem levar em conta os gastos relacionados à logística. Entretanto, nesses estudos, os valores de eficiência indicada para as misturas contendo essas concentrações de água são iguais ou menores aos da mistura E96EW04.…”

Section: Resultsunclassified

“…Fagundez et al [23] utilizaram um fator de energia líquida definido como a razão do valor do poder calorífico inferior e a energia gasta para obter etanol como combustível durante o processo de destilação. Os resultados apontaram que a mistura de etanol e água contendo 30% de água v/v de água em etanol foi o combustível mais eficiente, em termos de energia, para ser produzido e tendo a melhor utilização real para a energia química disponível.…”

Section: Introductionunclassified

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Investigação Do Uso De Elevadas Razões De Compressão Com Etanol Hidratado Através Da Análise De Liberação De Calor

Sari¹,

Nora²,

Martins³

et al. 2017

Blucher Engineering Proceedings

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The use of renewable fuels is pointed out as one of the best solutions to decrease the greenhouse gases emissions due to the balance in the CO2 chain. In this context, ethanol stands out as one of the best renewable fuels. Furthermore, the direct use of hydrated mixtures of this fuel can improve the energy balance, reducing the fuel cost. The increase in water concentration leads to lower indicated efficiencies. However, the water promotes an increase on knock resistance. This enables the use of higher compression ratios, improving the engine conversion efficiency. The modifications in this parameter to use wet ethanol mixtures is not well established. In this way, this study, aims to evaluate the impact of compression ratio increase on heat release and performance parameters. Mixtures containing 4, 10, 20 and 30% of water in ethanol in volumetric content were investigated. The tests were carried out at 8 bar BMEP and 1800 rpm. As a result, the increase in water concentration allowed operation at minimum spark advance for best torque (MBT) for compression ratios up to 14.5. INTRODUÇÃOUm dos grandes desafios da indústria automobilística é desenvolver seus motores para atingir os níveis de emissões regulamentados, principalmente dos gases que intensificam o efeito estufa. Para isso, o desenvolvimento de combustíveis que produzam menos emissões de CO2 do que os combustíveis fósseis são indispensáveis. Visando atender às regulamentações apresentadas na Conferência de Mudanças Climáticas das Nações Unidas em 2015 [1], muitos estudos vem sendo focados na pesquisa e desenvolvimento de combustíveis sustentáveis. Tais combustíveis devem apresentar baixa emissão de gases do efeito estufa, serem renováveis e economicamente rentáveis para se produzir.Neste cenário, o etanol surge como um dos melhores combustíveis alternativos, com propriedades fisico-químicas interessantes para a combustão. O etanol possui ainda um grande potencial de produção, sendo obtido das mais diversas culturas, criando empregos e renda, especialmente para países emergentes [2]. Não obstante, ainda é necessário obter processos de produção mais baratos e obter subsídio do governo de forma a tornar este combustível tão viável quanto combustíveis como o diesel ou a gasolina.

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Section: Resultsunclassified

Section: Introductionunclassified

Investigação Do Uso De Elevadas Razões De Compressão Com Etanol Hidratado Através Da Análise De Liberação De Calor

Sari¹,

Nora²,

Martins³

et al. 2017

Blucher Engineering Proceedings

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“…Ethanol is utilized as a fuel [1,2] and as an enhancer of gasoline octane number [3,4]. The advantages of using ethanol as a sustainable fuel are reduction of dependence on fossil fuels and decreased emission of greenhouse gases [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Vapor Liquid Equilibria for Ionic Liquid/Ethanol/Water Systems and the Effect of Anion Hydrolysis

et al. 2020

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The performance of two tetrafluoroborate-based ionic liquids (ILs) as entrainers in the dehydration of water/ethanol azeotropic mixtures was evaluated. Isobaric vapor-liquid equilibrium (VLE) data were measured for the systems ethanol/ water/1-butyl-3-methyl imidazolium tetrafluoroborate and ethanol/water /n-butylpyridinium tetrafluoroborate including the azeotropic region. VLE data for the ethanol/water, ethanol/IL, and water/IL binary mixtures were obtained at 100 kPa. The hydrolysis of the tetrafluoroborate anion was studied for both types of ILs by 19 F NMR analysis. The hydrolysis of the tetrafluoroborate anion does not have much effect on the ethanol/water VLE. The 19 F NMR analysis indicated that hydrolysis occurred at high mole fractions of water.

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“…Chauhan et al [15] and Sandalci et al [25] cite that among the methods used for ethanol use on diesel engine, fumigation is the more studied, for enabling the higher diesel substitution rate by ethanol, in energy terms (up to 50%), and for requiring fewer changes on the engine physical structure. Besides the use of commercial ethanol, with low water concentration, in recent years, studies have been carried out aiming to characterize the use of ethanol with high water concentrations (wet ethanol) on spark ignition engine [27][28][29][30] and compression ignition engines.…”

Section: Introductionmentioning

confidence: 99%

“…According to the literature previously mentioned, most studies have been carried out through experimental work on spark ignition engines [27][28][29][30] running with wet ethanol, or on a compression ignition engine using conventional hydrous ethanol (with low water concentration). Only a small part of research on this matter has studied the wet ethanol fumigation on small diesel engines operating with direct injection diesel oil and fumigated wet ethanol, especially applying air throttled as in this study.…”

Section: Introductionmentioning

confidence: 99%

Wet ethanol fumigation on a compression ignition engine: effects of air intake throttled

Rosa

Altafini

Wander

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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New techniques for the use of renewable fuels have been proposed by researchers around the world, seeking to reduce our dependence on fossil fuels and emissions of harmful gases. For compression ignition engines, fumigation stands out for allowing more significant replacements than other dual-fuel techniques, and also for not requiring modifications to the original engine structure. In this context, wet ethanol has emerged as one of the most viable fuels for port fuel injection due to its low reactivity and its renewable origin. This paper investigates the effects caused on the compression ignition engine by the use of diesel oil and wet ethanol by fumigation method and an air restriction in the engine intake through a throttle. The used engine was a small single-cylinder, coupled to an alternator, with constant load and engine speed. The fumigation fuel was wet ethanol with four different water concentrations, and different fractions of diesel oil substitution were tested. The results indicated that the use of ethanol and wet ethanol by the fumigation method increases conversion efficiency by up to 10% compared to the baseline test. However, the reduction in the intake airflow always causes a decrease in this efficiency. Intake air throttled also provided an increase in exhaust gas opacity compared to the free airflow conditions, but it is reduced when compared to the baseline test. Concerning specific emissions, carbon monoxide has higher emission levels when ethanol fumigation is used compared to the baseline condition. Under the same conditions, nitrogen oxide emissions are reduced.

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Determination of optimal wet ethanol composition as a fuel in spark ignition engine

Cited by 32 publications

References 26 publications

Investigação Do Uso De Elevadas Razões De Compressão Com Etanol Hidratado Através Da Análise De Liberação De Calor

Investigação Do Uso De Elevadas Razões De Compressão Com Etanol Hidratado Através Da Análise De Liberação De Calor

Vapor Liquid Equilibria for Ionic Liquid/Ethanol/Water Systems and the Effect of Anion Hydrolysis

Wet ethanol fumigation on a compression ignition engine: effects of air intake throttled

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