A numerical and experimental study of dual fuel diesel engine for different injection timings

Cameretti, Maria Cristina; Tuccillo, Raffaele; Simio, Luigi De; Iannaccone, Sabato; Ciaravola, Umberto

doi:10.1016/j.applthermaleng.2015.12.071

Cited by 45 publications

(22 citation statements)

References 11 publications

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“…Since the rapid combustion period ends earlier, the post-combustion period and the continual combustion period are extended, leaving more time for the NOx-generation reactions-hence, increased specific NOx emissions. Similar findings have also been explored in previous research [24][25][26][27][28]. On the other hand, the in-cylinder combustion temperature decreased as the SR increased and injecting more NG effectively reduced specific NOx emissions.…”

Section: Pollutant Emissionssupporting

confidence: 88%

Effects of Injection Timing on Combustion and Emission Performance of Dual-Fuel Diesel Engine under Low to Medium Load Conditions

et al. 2019

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A throttle can be installed on the intake pipe of a natural gas (NG)/diesel dual-fuel engine to control the excess air ratio of the air-fuel mixture by adjusting the air intake. Building on a previously proposed NG/diesel dual-fuel supply strategy using the adjustment of excess air ratio, this work further studied the effects of different injection timing schemes on output power, fuel efficiency, and pollutant emissions of a dual-fuel engine under low to medium load conditions. In the experiment, the engine was operated at a speed of 1600 r/min, under either low (27.1 N·m) or medium (50.6 N·m) loads, and the NG substitution rate was either 40%, 60%, or 80%. The effect of different injection timing schemes on the combustion performance of the engine under low to medium load conditions was studied based on in-cylinder pressure changes detected by a pressure sensor. Experimental results showed that under medium-speed low-load conditions and a NG substitution rate of 40%, setting the diesel injection timing to 27 °CA BTDC increased the engine output power by 9.03%, reduced the brake specific energy consumption (BSEC) by 13.33%, and effectively reduced CO, CO2, and HC emissions. Under medium-speed medium-load conditions with a NG substitution rate of 80%, setting the diesel injection timing to 25 °CA BTDC increased the engine output power by 14.62%, reduced the BSEC by 11.73%, and significantly reduced CO, CO2, and HC emissions.

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Section: Pollutant Emissionssupporting

confidence: 88%

Effects of Injection Timing on Combustion and Emission Performance of Dual-Fuel Diesel Engine under Low to Medium Load Conditions

et al. 2019

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“…x is the boost pressure (bar), y is the compression ratio (-), and z is the intake valve closing (degC). e predicted values of BSFC calculated by (10) are satisfactorily close to the simulation values. e effects of linear factors boost pressure, compression ratio, and intake valve closing are found to be highly significant (all p value <0.0001) on the BSFC.…”

Section: Evaluation Of Bsfcsupporting

confidence: 69%

“…In another way, both the gas fuel injection and liquid fuel injection are directly injected into a cylinder with different injection timing which is similar to the diesel cycle. In the early research, there were many methods to optimize the engine performance such as the fuel injection timing [10], the Miller cycle [11], and RCCI (reactivity controlled compression ignition) [12]. However, due to the expensive experiment of large marine engines, many optimizations focused on the cylinder part such as the fuel injection, Miller cycle [13], and EGR [14] by CFD (Computational Fluid Dynamics) tools.…”

Section: Introductionmentioning

confidence: 99%

Emission and Performance Optimization of Marine Four-Stroke Dual-Fuel Engine Based on Response Surface Methodology

Wang

Gan

Wang

et al. 2020

Mathematical Problems in Engineering

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As the emissions regulations have become more stringent, reducing NOX emissions is of great importance to the shipping industry. Due to the price and emissions advantages of natural gas, the diesel-natural gas engines have become an attractive solution for engine manufacturers. Firstly, in this paper, the NOX emissions prediction model of a large marine four-stroke dual-fuel engine is built by using AVL-BOOST. In addition, the model is further calibrated to calculate the performance and emissions of the engine. Then, the influences of boost pressure, compression ratio, and the timing of intake valve closing on engine performance and emissions are analyzed. Finally, the response surface methodology is used to optimize the emissions and performance to obtain the optimal setting parameters of the engine. The results indicate that the response surface method is a highly desirable optimization method, which can save a lot of repeated research. Compared with the results from manufactured data, the power is increased by 0.55% and the BSFC, the NOX emissions, and the peak combustion pressure are decreased by 0.60%, 13.21%, and 1.51%, respectively, at low load.

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“…The numerical modeling approach of diesel -biodiesel blend is also possible [13]. Besides of biodiesel, alcohols can be simulated numerically by using the appropriate CFD tool [14].…”

Section: Introductionmentioning

confidence: 99%

Optimization of methanol powered diesel engine: A CFD approach

Soni

Gupta

2016

Applied Thermal Engineering

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A numerical and experimental study of dual fuel diesel engine for different injection timings

Cited by 45 publications

References 11 publications

Effects of Injection Timing on Combustion and Emission Performance of Dual-Fuel Diesel Engine under Low to Medium Load Conditions

Effects of Injection Timing on Combustion and Emission Performance of Dual-Fuel Diesel Engine under Low to Medium Load Conditions

Emission and Performance Optimization of Marine Four-Stroke Dual-Fuel Engine Based on Response Surface Methodology

Optimization of methanol powered diesel engine: A CFD approach

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