Experimental investigation of a compression ignition engine operating on B7 direct injected and hydrous ethanol fumigation

Telli, Giovani Dambros; Altafini, Carlos Roberto; Rosa, Josimar Souza; Costa, Carlos Alberto

doi:10.1016/j.energy.2018.09.171

Cited by 13 publications

(11 citation statements)

References 46 publications

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“…This is probably due to the lower air mass inside the cylinder, which reduces the dilution of the heat generated during the combustion. With the increase in the ethanol mass fraction, regardless of water concentration in wet ethanol, the temperature of the exhaust gases reduced, as it was obtained by Telli et al [20], which can be attributed as a result of the heat absorbed by the ethanol for its vaporization. Low adiabatic ethanol flame temperature (2155 K) compared to diesel (2305 K) also can be attributed as the cause of a reduction in combustion temperature and consequently in exhaust gas temperature.…”

Section: Exhaust Gas Temperaturesupporting

confidence: 53%

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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: Exhaust Gas Temperaturesupporting

confidence: 53%

“…-ethanol and diesel blends, using a direct injection of the mixture in the combustion chamber [9][10][11][12][13][14]; -double direct injection in the combustion chamber; -ethanol fumigation (port fuel injection) and diesel direct injection in the combustion chamber [15][16][17][18][19][20][21][22][23][24].…”

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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“…In the experiments were employed hydrous ethanol (HET) with 95.5% purity and diesel fuel (B7) with 7% biodiesel. The physicochemical properties of the fuels used in the research were measured in the paper [17] and are listed in Table 2. Figure 1 illustrates a schematic of the experimental setup with its fundamental parts.…”

Section: Methodsmentioning

confidence: 99%

“…The most common methods to replace diesel fuel with ethanol in CI engines are the ethanol and diesel blends method [12][13][14] and the ethanol fumigation method [15][16][17][18]. The blend method is the simplest: mixing ethanol to the conventional diesel fuel and injecting the blend directly into the cylinder through the conventional diesel injector.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of a Dual-Fuel Generator Set Operating on Diesel Fuel Direct Injected and Hydrous Ethanol Fumigation at Different Loads

Telli¹,

Altafini²,

Costa³

et al. 2020

IJDNE

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The sizable global use of fossil energy and the worries about harmful emissions to the environment and human health have led investigations focused on using renewable fuels. Ethanol seems to be a desirable renewable fuel due to availability and significant production. The ethanol fumigation in compression ignition engines has been explored as a possible solution to enhance efficiency and decrease harmful and pollutant gases. This study investigates the effects of a generator set running on directly injected diesel fuel containing 7% biodiesel in volume and port fuel injected hydrous ethanol in different loads. The experiments were carried out in a diesel engine with specific loads, and the ethanol substitution rate ranged from 9% to 52% by energy. Results showed a significant decrease up to 61% in smoke opacity. An improvement of about 9.7% at 7.0 kW in global thermal efficiency was observed. Nevertheless, the other loads' efficiency deteriorated, resulting in a maximum decrease of about 14.6% at 4.0 kW. The total specific fuel consumption increased when ethanol was used, whereas the exhaust gas temperature decreased. The lowest NOX emissions found was 290 ppm at 6.0 kW and an ethanol energy ratio of 21%, although an increase in CO emissions was observed.

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“…Nevertheless, an increase in HC and specific fuel consumption were noted. There was not any mention about Nox; however, there was a reduction in exhaust gas temperature [49]. Edvin Geo et al [50] studied the effects of ethanol fumigation on the performance, combustion as well as emissions of diesel engines run on crude rubber seed oil and its methyl esters.…”

Section: Alcohol Fumigation Modesmentioning

confidence: 99%

A Review of Performance-Enhancing Innovative Modifications in Biodiesel Engines

Khan

2020

Energies

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The ever-increasing demand for transport is sustained by internal combustion (IC) engines. The demand for transport energy is large and continuously increasing across the globe. Though there are few alternative options emerging that may eliminate the IC engine, they are in a developing stage, meaning the burden of transportation has to be borne by IC engines until at least the near future. Hence, IC engines continue to be the prime mechanism to sustain transportation in general. However, the scarcity of fossil fuels and its rising prices have forced nations to look for alternate fuels. Biodiesel has been emerged as the replacement of diesel as fuel for diesel engines. The use of biodiesel in the existing diesel engine is not that efficient when it is compared with diesel run engine. Therefore, the biodiesel engine must be suitably improved in its design and developments pertaining to the intake manifold, fuel injection system, combustion chamber and exhaust manifold to get the maximum power output, improved brake thermal efficiency with reduced fuel consumption and exhaust emissions that are compatible with international standards. This paper reviews the efforts put by different researchers in modifying the engine components and systems to develop a diesel engine run on biodiesel for better performance, progressive combustion and improved emissions.

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Experimental investigation of a compression ignition engine operating on B7 direct injected and hydrous ethanol fumigation

Cited by 13 publications

References 46 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

Experimental Study of a Dual-Fuel Generator Set Operating on Diesel Fuel Direct Injected and Hydrous Ethanol Fumigation at Different Loads

A Review of Performance-Enhancing Innovative Modifications in Biodiesel Engines

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