Wyniki wyszukiwania - Biblioteka Nauki

1

Experimental tests on a dual fuel compression-ignition engine powered by biogas with a varying chemical composition

100%

Wierzbicki S. , Śmieja M. , Kozłowski M. , Nieoczym A. , Krzysiak Z.

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tom Vol. 23, No. 3

549--554

EN

Biogas is among the fuels whose significance in the general energy balance will increase. These results from the fact that it may be produced from various kinds of waste materials, and it is therefore considered a renewable fuel of the second generation. Because of its properties, biogas may be used directly to power spark-ignition engines. Nonetheless, numerous tests are underway involving the possibility of using biogas to power compression-ignition engines. In order to use biogas, whose main combustible component is methane, in compression-ignition engines, it is necessary to use a dual fuel power supply system. With such a system supplying power to the engine, the gas and air mixture in the cylinder is ignited by a small dose of liquid fuel. This paper presents a fragment of the research on the use of biogas with a varying chemical composition for powering compression-ignition engines. The described tests were conducted using a one-cylinder compressionignition engine mounted on an engine test stand. The fuel gas consisted of a mixture of natural gas and carbon dioxide; the share of each individual component was regulated from the station, which controlled the operation of the whole test stand. The developed control system also enabled the adjustment of the operating parameters of the engine test stand and the parameters of the injection of liquid fuel, such as the injection pressure, the timing angle of injection and the size of the dose. The results presented in the paper show the impact of the individual control parameters of the engine on the value of the engine’s torque and the amount of toxic compounds in the exhaust fumes.

2

The Effect Of Temperature On The Properties Of Fuel-Water Emulsion Applied For Feeding Marine Combustion Engines

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Zadrąg R.

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tom Vol. 2, no 1

519-526

EN

Delivering water to cylinders is a means of restricting the emergence of nitrogen oxides in the combustion process in SI engines. In consequence of feeding the engine with fuel-water emulsion with simultaneous decrease of nitrogen oxides in the exhaust gases, there occur changes in the concentrations of: carbon oxide, hydrocarbons, solid particles, and also changes in the basic indexes of engine work. The values of these changes depend in large degree on the assumed method of producing emulsion. Depending on the method applied there exists a definite set of control parameters characteristic for each method, whose values of particular parameters determine the properties of emulsion produced. One of these parameters is the temperature of, essential insomuch as it can be controlled in a simple way. The work presents the results of research on the effect of temperature of fuel-water emulsion produced in a helicoidal agitator on its properties, essential from the point of view of NOx emission load in the exhaust gases.

3

Effect of CO2 content in CNG on the combustion process in a dual-fuel compression ignition engine

63%

Wierzbicki S. , Mikulski M. , Śmieja M.

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2015

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tom R. 54, nr 3

91--101

EN

Seeking alternative sources of energy for its more effective use, reducing emissions of toxic pollutants to the atmosphere and counteracting global warming are nowadays the major areas of development in the power industry, including the design of combustion engines. Currently, the research into the use of new fuels, which may be effective sources of energy, is performed by many scientific centres. The use of biogas for production of energy in cogeneration systems is one of the ways for improvement of energy balance. In the research described herein, a dual-fuel compression ignition engine was fuelled with gaseous fuel with variable CNG and CO2 ratios. The tests were performed for engine fuelling controlled by both an original controller with the software optimised for single-fuel operation and for the injection of a pilot dose of diesel controlled by a dedicated controller enabling the adjustment and control of the injection and dose parameters. This paper presents the effect of carbon dioxide content in gaseous fuel on the combustion process and emission of toxic compounds in the engine examined.

PL

Poszukiwanie alternatywnych źródeł energii, zwiększenie efektywności jej wykorzystania, a także zmniejszenie emisji związków toksycznych do atmosfery i walka z globalnym ociepleniem są głównymi współczesnymi kierunkami rozwoju przemysłu energetycznego, w tym również silników spalinowych. Obecnie w wielu ośrodkach naukowych prowadzone są badania nad wykorzystaniem nowych paliw, które mogą być efektywnym źródłem energii. Jednym ze sposobów poprawy bilansu energetycznego jest wykorzystanie biogazu do wytwarzania energii w układach kogeneracyjnych. W opisanych w artykule badaniach dwupaliwowy silnik o zapłonie samoczynnym zasilany był paliwem gazowym o zmiennych proporcjach CNG i dwutlenku węgla. Badania przeprowadzono przy sterowaniu zasilaniem silnika zarówno przez oryginalny sterownik oprogramowany do pracy jednopaliwowej, jak i przy sterowaniu wtryskiem dawki pilotującej oleju napędowego przez dedykowany sterownik umożliwiający regulację i kontrolę parametrów wtrysku tej dawki. W artykule przedstawiono wpływ zawartości dwutlenku węgla w paliwie gazowym na przebieg procesu spalania oraz emisję związków toksycznych badanego silnika.

4

Analiza ilości związków toksycznych zawartych w spalinach opuszczających pomocniczy kocioł opalany podczas eksploatacji

63%

Myśków J.

Zeszyty Naukowe / Wyższa Szkoła Morska w Szczecinie

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2003

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tom nr 71

343-349

PL

Przedstawiono metodę analizy ilości związków toksycznych emitowanych do atmosfery przez pomocniczy kocioł opalany podczas eksploatacji statku w różnych stanach obciążenia kotła.

EN

The paper presents a suggested method of measuring toxic compounds emitted to atmosphere by auxiliary oil-fired boilers in different states of load.