Performance and emissions of diesel-gasoline-ethanol blends in a light duty compression ignition engine

Belgiorno, Giacomo; Blasio, Gabriele Di; Shamun, Sam; Tunestål, Per; Tunér, Martin

doi:10.1016/j.fuel.2017.12.090

Cited by 61 publications

(23 citation statements)

References 28 publications

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“…The addition of ethanol generated an increase in the percentage energy lost in the exhaust gas. As Belgiorno et al [42] indicated, the combustion duration is decreased when ethanol is added; thus, the period of time necessary for heat transfer to ambient occurs is also reduced, which increases the energy in the engine exhaust gas. The significant increase in the HC and CO emissions with introduction of ethanol, even with a lower exhaust gas temperature, suggested that the use of ethanol caused a discrete reduction in engine efficiency, which is verified in Table 5.…”

Section: Energy Analysismentioning

confidence: 99%

Evaluation of ethanol as additive for NOx and PM reduction in CI engines fueled with diesel–biodiesel blends using a pump assembly

Ferreira

Torres

Silva

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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This work describes the performance variation and emission profile of a single-cylinder diesel engine connected to a hydraulic pump controlling the engine speed and load. This hydraulic system makes it possible to measure the engine power output with simplicity and low cost. By using energy analysis, the engine performance was evaluated using four different fuels: mineral diesel; biodiesel; a diesel-biodiesel blend composed of mineral diesel (90%) and biodiesel (10%) in volume; and a ternary mixture composed of mineral diesel (82%), biodiesel (10%) and ethanol (8%) in volume. The biodiesel used in the tests came from waste cooking oil, and it was produced in the local pilot plant. Ethanol was used to decrease combustion temperature due to its high enthalpy of vaporization while increasing oxygen content in the mixture. Results revealed a slight increase in the emission of NO x emissions and a reduction in CO emissions with the increase in biodiesel content. The use of ethanol resulted in lower NO x (up to 6.5%) and PM emissions (up to 31.0%) but CO and HC emissions were increased. The energy efficiency and specific fuel consumption were increased when compared to mineral diesel when biodiesel content was increased. The introduction of ethanol caused an increase in fuel consumption as well as a slight reduction in energy efficiency.

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Section: Energy Analysismentioning

confidence: 99%

Evaluation of ethanol as additive for NOx and PM reduction in CI engines fueled with diesel–biodiesel blends using a pump assembly

Ferreira

Torres

Silva

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…However these investigations are concluded that by using one of these methods resulting the reduction of some emission components or improvement of performance in the back which increasing the some other emission components [4]. For example, by using biofuels as an alternative to diesel engines to reduce CO, HC and smoke emissions, they pay the price to increase NOx emissions [5].Belgiorno et al [6,7] investigated the CI engine using two oxygenated fuel blends and reduced the CO emissions and soot emissions simultaneously. Beatrice et al [8] identified optimised engine boundary conditions such as boost pressure, injection pressure, nozzle flow number, peak fire pressure and inlet turbine temperature to achieve a power density of 100 kW/l in light duty diesel engines.…”

Section: Introductionmentioning

confidence: 99%

Optimization of critical angle, distance and flow rate of secondary fuel injection in DI diesel engine using computational fluid dynamics

Sonachalam

Manieniyan

2021

SN Appl. Sci.

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This study presents the optimization of the intake manifold and the optimized flow rate of the acetylene gas which acts as a low reactivity fuel to achieve the superior performance and emission characteristics used in the Reactivity controlled compression ignition (RCCI) engine. Intake manifold is one of the engine components which are an important factor in determining the quality of combustion. A very recent evolution of the RCCI engine using the low temperature combustion technique requires a low reactivity fuel which is injected through the secondary fuel injector. The secondary fuel injector must be designed and optimized to allow the acetylene gas to maximize the engine performance and the amount of acetylene gas in liters per minute required for better combustion. If the secondary fuel injector is mounted apart from the critical point, then the performance of the RCCI engine may be poor and also if the acetylene gas is not supplied properly, there is a risk of poor combustion and also if the acetylene gas is supplied excessively, there is a risk of knocking along with the backfire due to the excess fuel charge accumulation during the combustion process. Physical testing of the secondary fuel injector in the intake manifold with different angles, distance and flow rate of supply of acetylene gas is time and cost consuming process. To mitigate this issue optimization is done through computational fluid dynamics principles comes in handy to minimize time and money. In our study, ANSYS-FLUENT software is used for simulation purposes. Optimization of acetylene gas injector distance is carried out by analyzing the pressure contours at the entrance of the combustion chamber. The optimized flow rate of acetylene gas and the injector inclination is found by analyzing the flow contours of turbulent kinetic energy and turbulent dissipation rate.

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“…With the increasing concern about diesel engine emissions, including nitrogen oxides (NOX) and particulate matter (PM), and the rising crisis of energy insecurity, utilization of alternative and sustainable fuels in diesel engines is regarded as a promising solution [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Ignition dynamics of DME/methane-air reactive mixing layer under reactivity controlled compression ignition conditions: Effects of cool flames

Jin

Wang

et al. 2019

Applied Energy

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A study of ignition dynamics in a turbulent dimethyl ether (DME)/methane-air mixture under Reactivity Controlled Compression Ignition (RCCI) conditions was conducted using direct numerical simulation. Initially, the directly-injected DME and in-cylinder premixed methaneair mixture are partially mixed to form a mixing layer in between. A reduced DME/CH4 oxidization mechanism, consisting of 25 species and 147 reaction steps, is developed and validated. Ignition is found to occur as a two-stage process. Low-temperature autoignition is first initiated in the fuel-rich part of the mixture and then transits to a cool flame, propagating towards the even richer mixture through a balanced reaction-diffusion mechanism. Cool flames not only develop in the mixing layer, but also in the initially stratified DME/methane-air mixture. The formation of high-temperature autoignition kernels is earlier than that in the homogeneous mixture at the same mixture fraction, which is thought to be accelerated by the cool flame. The expanding flames from high-temperature kernels are connected with the neighboring flames before they engulf the stoichiometric mixture iso-lines. The four branches of typical tetrabranchial flames, i.e. cool flame, fuel-rich premixed flame, diffusion flame, fuellean premixed flame coexist in the field. The fuel-lean premixed flame branch finally triggers the premixed methane-air flame. The multi-stage and multi-mode nature of the ignition process highlights the intractable challenge to model the RCCI engine combustion.

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Performance and emissions of diesel-gasoline-ethanol blends in a light duty compression ignition engine

Cited by 61 publications

References 28 publications

Evaluation of ethanol as additive for NOx and PM reduction in CI engines fueled with diesel–biodiesel blends using a pump assembly

Evaluation of ethanol as additive for NOx and PM reduction in CI engines fueled with diesel–biodiesel blends using a pump assembly

Optimization of critical angle, distance and flow rate of secondary fuel injection in DI diesel engine using computational fluid dynamics

Ignition dynamics of DME/methane-air reactive mixing layer under reactivity controlled compression ignition conditions: Effects of cool flames

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