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Improving the performance of diesel engines fueled with water-fuel emulsion

Samoilenko Dmytro, Savchenko Anatolii, Kravchenko Serhii

Combustion Engines

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2023

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R. 62, nr 3

116--122

EN

Due to unique properties, production and operation features, water-fuel emulsion (WFE) could be considered as one of the most promising type of alternative fuels for diesel engines. Experimental research showed that compared to traditional diesel fuel, application of water-fuel emulsion allows to reduce nitrogen oxides and soot emissions, which is due primarily to a decrease in the level of maximum temperatures in the engine cylinder, as well as a more uniform distribution of fuel over the combustion chamber volume thanks to its secondary dispersion (micro-explosion phenomena). To control the stability of water-fuel emulsion properties during engine operation it is recommended to install water content sensor in the fuel supply system.

2

Numerical investigation of heat transfer in fuel-water emulsion droplet

Rodzewicz R., Gieras M.

Archivum Combustionis

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2018

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Vol. 38 nr 1

1--10

EN

This paper aims to iiwestigate heat flow in fuel/water emulsion droplet using ANSYS Fluent code. A model was tested under different boundary conditions including various flow temperatures, velocities, droplet sizes, water contents, etc. The rate of a temperaturę increment was monitored inside dispersed phase droplets. The obtained results were compared to find out in which case boiling point was reached in all water droplets simultaneously. Such a temperaturę distribution is suspected to be the main condition for microexplosion occurrence. However, this should be confirmed experimentally. Simulations show that a higher temperaturę and a smaller droplet diameter may promote microexplosion. Also it appears that there exists an optimal flow velocity, when the difference of time of reaching boiling point for every water droplet is the smallest. The minor, but a very interesting observation concerns a negligible impact of water presence on heat distribution. It has been shown that treating an emulsion droplet as a continuum with an averaged specific heat of water and oil may result in an error less than 1%. It is an useful conclusion that enables the analytical approach to the problem. The obtained results provide a solid basis for further experimental research.

3

Emulsja oleju napędowego jako paliwo alternatywne

Pacholski P., Błaszczyk M., Sęk J.

Technical Issues

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2016

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nr 4

62--67

EN

Emulsified water-in-Diesel fuel is a solution that helps to reduce emissions of nitrogen oxides and particulate matters in compression-ignition engines. The biggest advantage of this fuel is a possibility to introduce it to older generation units without any modifications. The presented solution allows the mixture to be burned more complete which results in less soot formation. However, the practical application of this fuel is limited mainly because its limited stability. In this article we review the following issues connected with water-in diesel fuel: its production, stability, influence on engine performance and environmental benefits. The main aspect of this paper is to review the advantages related to better combustion of such emulsion and reduction in emission of health hazardous substances.

4

Mikrowybuchy przy budowie obwodnicy Babimostu

Łoszewski M.

Nowoczesne Budownictwo Inżynieryjne

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2009

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Nr 5

52-54

PL

Mikrowybuchy to technologia niezwykle nowoczesna, choć nienowa. Technikę wzmacniania masywu gruntowego przy pomocy ładunków wybuchowych opracowali Rosjanie już w latach 30. XX w. W Polsce zaczęto ją stosować w drugiej połowie XX w. Samo wykonanie wzmocnienia jest bardzo proste, nie wymaga dużych nakładów pracy i stosowania wyspecjalizowanego sprzętu, a dodatkowo pozwala na otrzymanie zadawalających rezultatów w bardzo krótkim czasie, co jest niezwykle ważne dla inwestorów.