Exploring optimal operating conditions for wet ethanol use in spark ignition engines

Sari, Rafael Lago; Golke, Diego; Enzweiler, Heveline; Salau, Nina Paula Gonçalves; Pereira, Fernando M.; Martins, Mario

doi:10.1016/j.applthermaleng.2018.04.078

Cited by 34 publications

(17 citation statements)

References 33 publications

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“…In the identification of the experiments, the number succeeding the letter "E" represents the volumetric percentage of ethanol, and the number succeeding the letter "W" represents the volumetric percentage of water. This nomenclature was previously used by authors such as Ambrós et al [27], Sari et al [29], and Nour et al [40,41]. The abbreviations FAF and RAF refer to the open throttle and partially closed throttle, respectively.…”

Section: Tests Identification and Experimental Proceduresmentioning

confidence: 99%

“…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%

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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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Section: Tests Identification and Experimental Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Previous studies on the electrical characteristics of flame under electric field mainly focus on the hydrocarbon fuels, but the results of ethanol fuels are still limited. Alcohols, especially ethanol, as renewable alternative fuel and addition 27,28 have attracted wide attention. The previous works are lack of comprehensive discussion on the electrical response for the alcohols flame.…”

Section: Introductionmentioning

confidence: 99%

Study on the electrical response of small ethanol‐air diffusion flame under the uniform electric field

2020

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Ethanol is a renewable alternative fuel in many application areas. The external electric field is applied to assist the small ethanol diffusion flame in this study. The electrical response of flame under the uniform electric field is discussed. A reduced chemical mechanism of ethanol is used to establish a numerical model corresponding to the experimental system. The characteristics of current-electric field strength, equivalent resistance, distribution of charged species, velocity field, and reaction rate are studied. The results show that the electric field brings significant effects on the combustion and electrical characteristics of flame. As the electric field strength increases, the current through the circuit and the equivalent resistance of the flame show a three-stage variation. The current increases first (0-40 kV/m), then stabilizes (40-70 kV/m) and then continues to increase (70-100 kV/m) with the increase of the electric field

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“…An alternative fuel must offer superior environmental benefits, financial competitiveness, enough production to supply a high energy demand, and provide a net energy gain over the total energy used in its production [1]. Ethanol is considered one of the most attractive biofuels for use in spark ignition engines, becoming a potentially sustainable resource that offers long-term environmental and economic advantages as opposed to fossil fuels.…”

Section: Introductionmentioning

confidence: 99%

Simple mathematical model for the numerical simulation of formaldehyde and acetaldehyde formed in the exhaust of a combustion engine operating with ethanol as fuel

Zárante¹,

Sodré²,

Chamorro³

2018

ces

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The following work presents the numerical simulation of the main aldehydes present in the exhaust of a 4-stroke internal combustion engine, which uses ethanol as fuel, varying the rotation speed from 2000 to 5000 rpm. The simulation consists of a first part made in a software specialized in engines where properties and initial concentrations are calculated that serve as input data to the mathematical model that calculates the concentration of formaldehyde and acetaldehyde, as well as their producers: ethane, methane and unburned ethanol in the exhaust duct. The simulation shows concordance in the trend of the substances analyzed with the data found in the literature. The formaldehyde and acetaldehyde concentrations calculated by the model are similar to those found in the literature, however, the concentration of unburned ethanol and, therefore, total acetaldehyde in the exhaust are lower than those reported by the different authors.

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Exploring optimal operating conditions for wet ethanol use in spark ignition engines

Cited by 34 publications

References 33 publications

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

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

Study on the electrical response of small ethanol‐air diffusion flame under the uniform electric field

Simple mathematical model for the numerical simulation of formaldehyde and acetaldehyde formed in the exhaust of a combustion engine operating with ethanol as fuel

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