Wszystkie pola: alternative process - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Knock combustion in dual fuel diesel engine
Autorzy:: Żółtowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/242833.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: road transport
IC engines
alternative fuels
combustion process in engine
Opis:: This article presents the problem of the knock combustion in a dual fuel compression engine, in which additional fuel besides diesel oil was compressed natural gas (CNG). CNG was injected into the engine intake system and mixed with air supplying the engine. In this paper described the reasons of knock combustion, which occur with more intensity with the increase of methane content in engine fuel. The phenomenon of knock combustion in the dual fuel engine is difficult to eliminate, often impossible to avoid, and it forms a barrier limiting increase of methane share in the fuel. Also, this article contains the results of engine indicating and discussion on changes in the indicating diagrams caused by knock combustion. Carried out tests included engine indicating and numerical calculation of indicator diagrams with using spectral analysis and filtering cylinder pressure signals with high-pass filters. As a result of this calculation, several parameters describing intensity of knock combustion were determined. They allow to tell taking into account only cylinder pressure analysis if there is knock combustion inside engine combustion chamber or not. Knocking is an undesirable type of combustion in the engine, leading to excessive thermal and mechanical loading of the engine parts, causing premature wear of them. For this reason, this type of combustion should be eliminated from the engine operation and researchers of combustion processes must be provided with tools to detect and determine this kind of combustion.
Źródło:: Journal of KONES; 2014, 21, 4; 547-553
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Investigation of combustion process in dual fuel diesel engine
Autorzy:: Żółtowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/247295.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: road transport
combustion engines
air pollution
environmental protection
alternative fuels
combustion
Opis:: In this paper are presented results of dual fuel diesel engine bench testing carried out by author. The engine was fuelled parallel with two fuels. The second, additional fuel was compressed natural gas (CNG). CNG was injected into engine inlet system before inlet to engine turbocharger. There was installed a pressure transducer in one of engine cylinders and cylinder pressure was registered at the time of testing. There is discussed place and way of pressure sensor installation and impact on quality of indicating signals of the channel connecting the transducer with combustion chamber. The carried out investigations included measurement of emissions and engine indicating completed with the heat release characteristics. There was considered influence of CNG on CO, NOx, THC and NMHC emissions, especially how pollutant emissions depend on the share of methane in fuel. The effect of using natural gas as an additional fuel injected to regular CI engine on heat release rate was investigated, as well as its rate and duration. Discussed the differences between combustion of methane and diesel oil and ways of spreading flames into air-fuel mixture for these two mixed fuels The processes of combustion of diesel oil and methane are totally different. The study searches for the limits of methane content due to knocking combustion. Additive of methane to the diesel fuel is a reason of retarded heat release, decrease of engine efficiency, greater fuel consumption and changes in emissions corresponding to the lag of self-ignition
Źródło:: Journal of KONES; 2014, 21, 2; 303-309
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Simulation of injection and combustion processes in 4-stroke spark ignition engine with CNG direct injection
Autorzy:: Sendyka, B.
Mitianiec, W.
Noga, M.
Wachulec, W.
Powiązania:: https://bibliotekanauki.pl/articles/246095.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: injection process
combustion process
simulation
modelling
alternative fuels
CNG
Opis:: The paper presents results of simulation conducted as afirst step of 4-stroke spark ignition experimental engine testing. The simulations were performed in a KIVA-3Vsoftware, which is intended to carry out a 3-D simulations of engine's processes. The source code of the software has been modified in order to apply it for gas injection. Original version of the software has been designedto simulate liquid fuel injection only. The simulation of direct CNG injection and combustion has been done for stratified and homogenous modes in order to check the assumed injection, ignition and charging parameters. Important assumption is that the injector had only one nozzle with flow area equal to 2 mm2. Two different cases of fuel direct injection for stratified charge have been analysed. In the first case fuel jet was almost vertical. In the other one fuel jet was nearly horizontal. Further testing has been performed using one-cylinder motorcycle 4-stroke SUZUKI DR-Z400S engine adapted to CNG fuelling. Such an engine has a suitable high compression ratio for CNG fuelling. The simulation has confirmed assumed parameters and has shown that one nozzle injector doesn't provide required fuel stream dissipation and piston crown modification is needed to direct fuel stream in spark plug area. However doing simulation requires some effort this example has shown than this is very important step before conducting experimental tests which provides crucial information and helps to avoid expensive mistakes which can be made during experimental engine preparation.
Źródło:: Journal of KONES; 2010, 17, 1; 373-378
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Preliminary research of the diesel knock phenomenon with using of the crankshaft acceleration method
Autorzy:: Górski, K.
Lotko, W.
Powiązania:: https://bibliotekanauki.pl/articles/242350.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diesel knock
transient conditions
combustion process
acceleration method
wavelet transform
alternative fuels
Opis:: Paper presents an experimental study on the pressure variations inside of 3 - cylinder, a direct injection AD3.152 type diesel engine. The main aim of the preliminary engine test was to use of the crankshaft free acceleration method for detection of diesel knock phenomenon. For this research, each combustion chamber was equipped with AVL cooled pressure sensor mountedat the top of engine head. Using of such sensors and special prepared at Technical University of Radom data acquisition system allow to record time histories of in-cylinder pressure variations at conditions of free acceleration of the engine crankshaft. Results presented in this paper show, that such transient engine conditions can be successfully used for detection of diesel knock phenomenon. High frequency pressure oscillations, typical for knocking were observed in the first phase of the acceleration process for selected combustion chambers. Experimental tests have been done for engine fuelled with regular diesel oil (DF) and its blend with Ethyl Tert Butyl Ether (ETBE) used as an oxygenated additive. Engine test procedure, used methodology and data acquisition system and engine test results carried out in non-stationary conditions with using of crankshaft acceleration method are presented in the paper.
Źródło:: Journal of KONES; 2009, 16, 2; 141-148
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Reduction emission level of harmful components exhaust gases by means of control of parameters influencing on spraying process of biofuel components for aircraft engines
Autorzy:: Jankowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/245547.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
aircraft engines
alternative fuels
fuel atomization
exhaust gas emissions
Opis:: The aim of the research is to test the fuel additives which decrease dimensions of atomised fuel drops, by applying changes to the specific parameters which impact the atomisation process. Those parameters include density, surface tension, viscosity and the viscosity index. Dimensions of drops of biofuels are much bigger compared to hydrocarbon fuels. By modifying the physical and chemical parameters of biofuels, dimensions of drops in an atomised fuel stream should become smaller. Those dimensions play a major role for the level of emissions of hydrocarbon and carbon monoxide, as well as mainly nitrogen oxides and particulates. The research on emissions of toxic components of fuel is relatively advanced today in the field of piston combustion engines, especially for use in car vehicles. However, the dynamic development of the air transport brings more pressure on the issue of toxic emissions in the case of aircraft engines. The level of toxic emissions from aircraft engines may be from ten up to even several thousand times greater than the level of emissions from piston engines. The issue of how biofuel additives can affect the process of fuel atomisation and thus enable the control over the atomisation to obtain the smallest possible drops leading to reduced nitrogen oxides emissions is a new and original issue. The reduced nitrogen oxides emissions in the case of biofuels is of utmost significance because, according to latest knowledge, those levels are increasing.
Źródło:: Journal of KONES; 2011, 18, 3; 129-134
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The economic dimension of the electromagnetic process : comparison study of costs of repairs of electric vehicles and powered with conventional fuels
Autorzy:: Lewicki, W.
Powiązania:: https://bibliotekanauki.pl/articles/247423.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: electro-mobility
alternative power sources
conventional fuels
operating costs
economic dimension
repair costs
spare parts
Opis:: The development of electro-mobility in Poland is one of the inevitable processes awaiting the Polish automotive industry. For each potential electric vehicle user, the information on the vehicle’s operating costs therefore becomes an imperative of tremendous importance. The analysis of market prices of passenger cars clearly indicates that the costs of acquiring a new electric vehicle are much higher than conventional fuel vehicles. Therefore, the expectations of customers themselves become fundamentally significant, who in relation to the spare parts in the case of this category of vehicles expect the highest technological and quality standards while maintaining the suitable price parameter. The article attempts to signal the issues related to the evaluation of electro-mobility parameters by presenting the comparative study of the costs of repairing electric vehicles and vehicles fuelled by conventional fuels. Considerations were supplemented by authoritative cost simulations, including the comparison of the same models of vehicles equipped with both the conventional and ecological power units. The aim of the article is to draw attention to the essence of the research problem and to answer the question whether the total costs of operating electric vehicles are in reality significantly lower than that of vehicles fuelled by conventional fuel.
Źródło:: Journal of KONES; 2017, 24, 3; 167-172
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The effect of adding 2-ethylhexanol to jet fuel on the performance and combustion characteristics of a miniature turbojet engine
Autorzy:: Gawron, B.
Białecki, T.
Król, A.
Powiązania:: https://bibliotekanauki.pl/articles/247180.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: alternative fuels
alcohol to jet
combustion process
miniature jet engine
exhaust emission
paliwa alternatywne
proces spalania
miniaturowy silnik odrzutowy
emisja spalin
Opis:: There are currently many studies undergoing in the field of using alternative fuels for supplying different types of propulsion units. The ASTM standard in the aerospace industry, allows using five different technologies of manufacturing synthetic components apart from standard oil-based fuel for the propulsion of turbine engines (as a blend up to 50% with conventional fuel). One of these is a technology associated with the process of converting alcohols (isobutanol) to jet fuel – Alcohol to Jet (ATJ). In the research performance, emission parameters were measured on laboratory test rig with miniature turbojet engine (MiniJETRig). The test rig has been created in Air Force Institute of Technology for research and development works aimed at alternative fuels for aviation. The miniature engine was fuelled with conventional jet fuel – Jet A-1 and blend of Jet A-1 with 2-ethylhexanol. The results for this blend were compared with the results obtained for neat Jet A-1 fuel in terms of different engine operating modes, according to specified methodology. The conducted tests did not show significant differences in engine operating parameters (thrust, fuel consumption and thrust specific fuel consumption) and the values of CO, CO2 and NOx emission indices between the tested fuels. The engine tests took place in similar ambient conditions. Laboratory tests of selected physicochemical properties were also carried out for both fuel samples.
Źródło:: Journal of KONES; 2018, 25, 1; 101-109
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Influence of the composition of microemulsiye fuel hydrocarbon-ester-ethanol on chosen parameters of diesel engines combustion process
Wpływ składu paliwa mikroemulsyjnego węglowodorowo-estrowo-etanolowego na wybrane parametry procesu spalania w silniku o zapłonie samoczynnym
Autorzy:: Kruczyński, S. W.
Orliński, P.
Orliński, S.
Powiązania:: https://bibliotekanauki.pl/articles/242093.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diagnostyka silnika
paliwa ekologiczne i środowisko
engine diagnostics
alternative fuels and environment
Opis:: The paper presents investigation results of the PERKINS 1100 engine. The engine was supplied with a microemulsive fuel mixture: hydrocarbon-ester-ethanol and comparatively with hydrocarbon, low-sulphur EKODIESEL PLUS 5 OB Diesel fuel, as well as the methyl ester of rape oil acids FAME (100%). Usingfuels with different physical and chemical properties for compression-ignition engines requires high accuracy of diagnostic parameter measurements in order to examine differences in processes of injection and combustion. Necessity of fulfilling more and more strict standards concerning emission of toxic components ofexhaust gases forces technical staff servicing Diesel engines to possess quick and precise methods which assess their technical state, particularly combustion process and state of injection equipment. Analysis of the experimentally obtained diagrams of fuel pressure in the injection line andneedle lift enables to determine injection angle. Experimentally obtained indicating diagrams of the engine were used later on to make relative heat release speed diagrams during combustion. In the paper it was proven, that the art of fuel with different physical and chemical properties has a significant influence on the fuel injection process and its burning, duration of injection time, fuel speed out of the spray er as well as the time of stream lasting and quality of its disintegration into drops. This influence affects fuel consumption, energy parameter's, exhaust emission and acoustic signal of an engine.
W referacie przedstawiono wyniki badań silnika PERKINS 1100. Silnik zasilany był mieszaniną paliwa mikroemulsyjnego: węglowodorowo-estrowo-etanolowego oraz porównawczo węglowodorowym, niskosiarkowym olejem napędowym EKODIESEL PLUS 50B i estrem metylowym kwasów oleju rzepakowego FAMĘ (100%). Zastosowanie paliw o różnych właściwościach fizykochemicznych do silników wysokoprężnych wymaga dużych dokładności pomiarów parametrów diagnostycznych celem poznania występujących różnic w procesach wtrysku i spalania. Spełnianie coraz bardziej rygorystycznych norm emisji składników toksycznych spalin zmusza personel techniczny serwisujący silniki spalinowe o zapłonie samoczynnym do posiadania szybkich i precyzyjnych metod oceny ich stanu technicznego, szczególnie procesu spalania oraz stanu aparatury wtryskowej. Analiza eksperymentalnie wyznaczonych wykresów przebiegu ciśnienia paliwa w przewodzie wtryskowym i wzniosu iglicy wtryskiwacza umożliwia wyznaczenie kąta wyprzedzenia wtrysku. Wyznaczanie charakterystyk względnej prędkości wydzielania się ciepła podczas procesu spalania przeprowadzono w oparciu o eksperymentalnie sporządzone wykresy indykatorowe silnika. W referacie wykazano, że rodzaj paliwa o różnych właściwościach fizykochemicznych ma istotny wpływ na proces wtrysku paliwa i jego spalanie, czas trwania wtrysku, prędkość wypływu paliwa z rozpylacza oraz czas trwania strugi paliwa i jakość jej rozpadu na krople. Wpływ ten przejawia się w oddziaływaniu na zużycie paliwa, na wskaźniki energetyczne, emisję toksycznych składników ze spalinami oraz emisję akustyczną.
Źródło:: Journal of KONES; 2009, 16, 3; 195-201
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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