Towards keeping diesel fuel supply and demand in balance: Dual-fuelling of diesel engines with natural gas

Hegab, Abdelrahman; Rocca, A. La; Shayler, P. J.

doi:10.1016/j.rser.2016.11.249

Cited by 57 publications

(25 citation statements)

References 134 publications

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“…Nonetheless, the world diesel engine sales were forecasted to rise by 7.7% annually through 2017 [1], while the fact was not as expected. Despite predictions, between 2010 to 2040, gasoline demand decreased by 10%, while diesel had higher demand up to 85% [2]. Though diesel engines…”

Section: Introductionmentioning

confidence: 94%

The Influence of Formulation Ratio and Emulsifying Settings on Tri-Fuel (Diesel–Ethanol–Biodiesel) Emulsion Properties

Aziz

Hagos

et al. 2019

Energies

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In this study, an alternative fuel for compression ignition (CI) engines called tri-fuel emulsion was prepared using an ultrasonic emulsifier. The objective of the study is to investigate the effect of emulsifying settings and formulation ratio on the physicochemical properties of tri-fuel emulsions. Design of experiment (DOE) with the two-level factorial design was employed to analyze the effect of emulsifying settings such as time, amplitude, and cycle along with the variation ratio of tri-fuel emulsion components as control factors. Numbers of responses identified were important parameters that may contribute to microexplosion phenomenon in CI engine. Analysis of variance (ANOVA) was carried out for each response, and the results indicated that density, dynamic viscosity, surface tension, and average droplet size were influenced by specific preparation control factors. Furthermore, interaction among the control factors was found to affect the responses as well. Interaction means the effect of two factors together is different than what would be expected from each factor separately. Besides, the stability of the tri-fuel emulsion was observed for three months. Furthermore, a qualitative approach with a multiobjective lens digital microscope revealed the geometry of freshly made dispersed tri-fuel emulsion droplets. Microscopic examination on tri-fuel emulsion droplets has shown that the dispersed ethanol capsulated within diesel with the help of biodiesel is similar to a water in diesel emulsion and is dissimilar to commercial diesel mixed with fatty acid methyl esters found in the market.

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Section: Introductionmentioning

confidence: 94%

The Influence of Formulation Ratio and Emulsifying Settings on Tri-Fuel (Diesel–Ethanol–Biodiesel) Emulsion Properties

Aziz

Hagos

et al. 2019

Energies

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“…As an alternative, fuel natural gas has the superiority of emissions reduction [8]. Besides taking the market fluctuations and fuel prices into account, natural gas has a more attractive price advantage [9]. In order to meet the strict scheme, international engine manufacturers, including MAN and Wartsila, have turned their research focus on reducing gas emissions.…”

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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“…Current technologies for reducing NOx emissions mainly include exhaust gas re-circulation (EGR) [2], exhaust gas selective catalytic reduction [3], electronically controlled fuel injection technology [4], Miller cycle [5] and so on. In addition, natural gas-diesel dual-fuel engines are considered to be a more attractive solution due to higher natural gas reserves and lower emissions [6][7][8]. Combined with the Miller cycle, NOx emission in dual-fuel engine can be further reduced [9,10].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Miller cycle on the performance and emission in a natural gas-diesel dual-fuel marine engine by using two zone combustion model

et al. 2020

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Compared to the standard cycle, the Miller cycle decreases the cylinder maximum combustion temperature which can effectively reduce NOx emissions. In this paper, a 0-D two-zone combustion model is used to establish the simulation model of a marine dual-fuel engine, which is calibrated according to the test report under different loads. Due to the high emissions under part load, the Miller cycle (early intake valve closing method) is used for optimization. By analyzing the cylinder pressure, temperature, heat release rate, and NOx emissions under different cases, it can be found that the effective working volume and thermal efficiency decrease with the advance of intake valve closing and improve with the increase of the geometric compression ratio. In all optimization cases, the NOx emissions and fuel consumption are reduced by 72% and 0.1%, respectively, by increasing the geometric compression ratio to 14 and the intake valve closing timing to 510 °CA (the reference top dead center is 360 °CA). The simulation results show that the early intake valve closing Miller cycle can effectively reduce the NOx emissions and cylinder peak pressure.

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Towards keeping diesel fuel supply and demand in balance: Dual-fuelling of diesel engines with natural gas

Cited by 57 publications

References 134 publications

The Influence of Formulation Ratio and Emulsifying Settings on Tri-Fuel (Diesel–Ethanol–Biodiesel) Emulsion Properties

The Influence of Formulation Ratio and Emulsifying Settings on Tri-Fuel (Diesel–Ethanol–Biodiesel) Emulsion Properties

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

Investigation of the Miller cycle on the performance and emission in a natural gas-diesel dual-fuel marine engine by using two zone combustion model

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