A numerical investigation on combustion and emission characteristics of a dual fuel engine at part load condition

Mousavi, Seyed Mohammad; Saray, Rahim Khoshbakhti; Maghbouli, Amin

doi:10.1016/j.fuel.2015.10.052

Cited by 53 publications

(21 citation statements)

References 27 publications

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“…The same results have been confirmed by Micklow et al [5] and Yang et al [22]. Additionally, the proposed model confirms that n-heptane, the most-reactive fuel component, burns at a faster rate compared to iso-octane which is less-reactive [15]. Adding gasoline fraction above 60% slows down the progress of combustion process which increases the heat release duration.…”

Section: Resultssupporting

confidence: 77%

“…Adding gasoline fraction above 60% slows down the progress of combustion process which increases the heat release duration. This causes the combustion process to expand toward the power stroke which causes incomplete combustion, and consequently emitting high amounts of HC and CO [15]. Moreover, the existence of high amounts of low reactivity fuel across the cylinder and especially at cold regions (gasoline near the wall and the crevices, where it is difficult for the fuel to burn) has a stronger effect than the oxidation processes enhancement [25].…”

Section: Resultsmentioning

confidence: 99%

“…Ghazal [11] investigated the effect of H 2 /diesel blend fuel ratio, engine speed, and air/fuel ratio on CI engine performance and emissions. The results showed that the hydrogen concentration between (30%-40%) with (A/F) ratio range (15)(16)(17)(18)(19)(20) improves the engine production power and brake thermal efficiency with a reduction of emissions. The reactivity controlled compression ignition engine (RCCI) which combines two or more fuels with different reactivity (such as diesel and gasoline) is another promising technology to provide low emissions and high engine performance compared to a conventional diesel engine.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the increased intake air temperature causes the reduction of HC and CO emissions. Puduppakkam et al [15] studied the use of a five-component gasoline surrogate and a one-component diesel surrogate by using CFD model based on detailed chemical kinetics approach to simulate the reactivity controlled compression ignition engine (RCCI). They concluded that as the combustion phasing is retarded, the unburned hydrocarbon and CO emissions increase for the base case and the net indicated thermal efficiency increased up to 50%.…”

Section: Introductionmentioning

confidence: 99%

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Reducing Diesel Engine Emission Using Reactivity Controlled Approach

Ghazal

2018

J. Ecol. Eng.

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Several automobile manufacturers are interested in investigating of dual fuel internal combustion engines, due to high efficiency and low emissions. Many alternative fuels have been used in dual fuel mode for IC engine, such as methane, hydrogen, and natural gas. In the present study, a reactivity controlled compression ignition (RCCI) engine using gasoline/diesel (G/D) dual fuel has been investigated. The effect of mixing gasoline with diesel fuel on combustion characteristic, engine performance and emissions has been studied. The gasoline was injected in the engine intake port, to produce a homogeneous mixture with air. The diesel fuel was injected directly to the combustion chamber during compression stroke to initiate the combustion process. A direct injection compression ignition engine has been built and simulated using ANSYS Forte professional code. The gasoline amount in the simulation varied from (50%-80%) by volume. The diesel fuel was injected to the cylinder in two stages. The model has been validated and calibrated for neat diesel fuel using available data from the literature. The results show that the heat release rate and the cylinder pressure increased when the amount of added gasoline is between 50%-60% volume of the total injected fuels, compared to the neat diesel fuel. Further addition of gasoline will have a contrary effect. In addition, the combustion duration is extended drastically when the gasoline ratio is higher than 60% which results in an incomplete combustion. The NO emission decreased drastically as the gasoline ratio increased. Moreover, addition of gasoline to the mixture increased the engine power, thermal efficiency and combustion efficiency compared to neat diesel fuel.

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Section: Resultssupporting

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reducing Diesel Engine Emission Using Reactivity Controlled Approach

Ghazal

2018

J. Ecol. Eng.

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“…Recently, the natural gas/diesel combined fuel engine's implementations have been under focus both theoretically and experimentally to specifically understand the reaction nature [15,19,20]. The natural gas/diesel fuel ratio, the natural gas initial percentage and the natural gas initial composition with their initial temperatures and pressures conditions were studied and evaluated taking in consideration the intake air temperature [15, 21,22].The most significant drawback of the dual fuel engines compared with the conventional diesel engine is represented in efficiency redundancy in addition to higher CO emissions in case of low fuel loads [23,24]. At high and intermediate loads both of the engine's output and CO emissions are better than those in the conventional diesel engines [20,23,24].…”

Section: Introductionmentioning

confidence: 99%

The Study on Dual Fuel Spray and Characteristics of Combustion of Diesel, Natural Gas and Dual Fuel

Abdalla

Wang

Xiaoqiang

2018

JEC

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Combustion of fossil fuels provides around 88% of total energy supply for modern society, and meanwhile causes many environ mental problems and social problems such as air pollution and energy crisis. Therefore， both at home and abroad are focusing on the research and development of natural gas engine recently.However, the mass production and application of this kind of engine are restricted by some unsolved technical difficulties. This paper explored the injection, combustion and emission processes of diesel/ natural gas and dual fuel engine based on Chemkin II, Fire software and Schlieren method. The experimental study on the mixing process of dual fuel jet was carried out by using high-speed Schlieren method in a constant volume bomb. Based on the Fire software, and then applied to Chemkin II software to analyze the effect of the initial temperature and pressure on the net heat production and combustion emissions. The results show that Dual fuel mechanism is capable of producing different heat production behaviors when varying the initial pressure and temperature CO2 emissions are minimized by changing the initial pressure above or below the atmospheric value. However, CO emissions are peaked when diesel fuel is used. The dual fuel engine minimizes the CO emissions amount caused by diesel fuel. Increasing the initial pressure eliminates dual fuel CO2 combustion emissions. The research of this paper is important to optimize the in cylinder combustion processes of natural gas engine, and have a certain important meaning to guide the development of diesel ignition dual fuel engine.

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