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Wyszukujesz frazę "fuel aging" wg kryterium: Temat


Wyświetlanie 1-7 z 7
Tytuł:
Discussion over correctness of methods used for test of resistance fuels to ageing processes
Autorzy:
Dzięgielewski, W.
Kulczycki, A.
Powiązania:
https://bibliotekanauki.pl/articles/241909.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
fuel
storage
fuel aging
Opis:
Research of usefulness of fuels for long-term storage is an important research of products of special use (meant for stock keeping as national or military reserves). Important fact is that fuels after storage should be used according to their initial use so their phisico-chemical and exploratory properties should remain the same during the whole storage cycle. Basic condition, enabling to foreseen that fuel will keep its quality at sufficient level in certain timeframe should be positive results of ageing tests. Below the doubts are presented whether methodology of evaluation is correct because of important differences in mechanisms of accelerated laboratory tests as well as real storage in typical conditions of storage tanks with large capacity. Differences in courses of chemical reactions and conditions of their initiation and course were pointed out. Scheme of equipment for marking content of existing gums, scheme of equipment for testing induction period, scheme of filtering and oxidizing equipment to test resistance of fuel to oxidation, effectiveness of collisions of molecules of reactants, scheme of chemical ageing process of fuels storaged in different temperature, function for different conditions ageing process of FAME, influence of value of potential molecules energy on initializing of chemical reactions are presented in the paper.
Źródło:
Journal of KONES; 2014, 21, 4; 103-109
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The method, based on storage simulator and IR – VIS spectroscopy, for predicting the allowable time of storage of biocomponents for CI engines
Autorzy:
Dzięgielewski, W.
Kaźmierczak, U.
Kulczycki, A.
Okniński, R.
Stefanowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/242434.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
fuel
fuel aging
oils
lubrication
biocomponents
Opis:
The paper presents the results of investigations concerning a new method used for predicting the allowable time of storage of biocomponents – FAME. The method was based on laboratory research carried out with the use of a storage tank simulator. The aging process was carried out in the conditions increasing the reaction rate – at high temperature. There are several methods/procedures used for predicting the allowable time of storage of fuels and biocomponents – FAME, but all of them are based on tests at the temperature so high that the mechanism of aging process is different than the one observed in storage tanks. It was assumed that the aging process could be divided into two stages: at the first stage, the aging precursors are created and at the second stage, precursors are converted into the fuel aging products. These products lead to changes in fuel properties. The kinetics of precursor creation determines the rate of all reactions, which lead to the final aging products. It was found that the rate of reaction at the first stage of fuel aging can be effectively increased by an increase in temperature and even relatively high temperature does not change the mechanism of the creation of aging precursors. The method that has been worked out makes it possible to control the mechanism of aging process during quick laboratory tests. The products of aging processes were detected with the use of the IR-VIS spectrometry. The allowable time of storage was determined for several FAME samples on the basis of quick laboratory tests. The results of laboratory quick tests were verified by comparing them with the results of the aging process of FAME in storage tanks. On the basis of the test results, the algorithm of allowable time of FAME storage calculation was worked out.
Źródło:
Journal of KONES; 2016, 23, 1; 115-121
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aging processes of biodiesel and biodiesel/diesel fuel blends
Autorzy:
Jankowski, A.
Baczewski, K.
Powiązania:
https://bibliotekanauki.pl/articles/246930.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
diesel engines
biofuels
FAME
fuel aging
emissions
Opis:
There has been increasing interest in recent years in the use of biodiesel as a substitute for petroleum-based diesel fuel. Fatty acids methyl esters (FAME) in a pure form are applied as a biodiesel B100 or as blends with diesel fuels named as the B10 biodiesel, the B20 biodiesel etc. FAME is susceptible to oxidation and to changes of other essential parameters during aging processes, which have an essential influence the NOx emission. Change of biodiesel parameters results in deterioration of fuel working properties and in increase of the NOx emission level. The increased NOx emission level is accompanied with high viscosity. Experiments with the PDPA laser-equipment showed that high content of biodiesel in a fuel increases the Sauter Mean Diameter (D32) of a fuel spray. The Sauter Mean Diameter increases with time of the aging process of biodiesel, what additionally can unfavourably influence the level of emission of exhaust gases. The research results of samples of aging processes of Rapeseed Methyl Ester (RME) accomplishing requirements of the EN 14214 European Biodiesel Standard, diesel fuel accomplishing requirements of the EN 590 (for based diesel fuel and blends of based diesel fuel and RME containing 1%, 5%, and 20% RME) are presented in the paper. Determination of influence of the fuel properties and the aging process on the acid number, kinematic viscosity, cloud point, cold filter plugging point, and pour point of fuel samples was an aim of performed research, as well the aging RME effect on elastomers comparatively with fresh RME. The process of fuel samples aging was enforced by the daylight (sun) effect, air, the elevated temperature and water. Fuel samples were aged in laboratory conditions during 15 and 60 weeks. Then the changes of fuels properties with relation to the same properties in initial conditions were determined. The water presence intensifles the process of the RME aging, especially in longer contact. An essential novel aspect of the paper is a relation determined between changes of biodiesel properties during aging and the NOx emission level that is connected mostly with increased viscosity. Rise of viscosity increases size of droplets of spray ed fuel, which results in increased emission level. Prevention of viscosity changes is an efficient way of the NOx emission decrease.
Źródło:
Journal of KONES; 2010, 17, 2; 167-180
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of non-normative fuel on its operational properties
Autorzy:
Matuszewska, Anna
Owczuk, Marlena
Powiązania:
https://bibliotekanauki.pl/articles/133865.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
non-normative fuels
long-term storage
fuel aging
gasoline
paliwa nienormatywne
magazynowanie długoterminowe
starzenie paliw
benzyna
Opis:
Fuels that do not meet the requirements of quality standards cannot be used to power vehicle engines. The work involved physico-chemical analyses of non-normative fuel and its effect on the operational properties of the powered vehicle. The research fuels were two gasolines, characterized by a reduced resistance to oxidation processes due to their long-term storage. The results were compared to the properties of conventional fuels that met all normative requirements. The studies have shown that the fuel slightly deviating from the standard parameters does not noticeably affect the useful properties of the vehicle.
Źródło:
Combustion Engines; 2019, 58, 3; 67-70
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena zmian wybranych właściwości paliw w czasie ich magazynowania
Assessments of changes selected properties of fuels during their storage
Autorzy:
Czarnocka, J.
Jakubiak, A.
Powiązania:
https://bibliotekanauki.pl/articles/1286919.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
biopaliwa
starzenie paliw
magazynowanie paliw
odporność na utlenianie
biofuels
aging of fuels
fuel storage
oxidation resistance
Opis:
W ramach badań projektowych podjęto analizę zmian starzeniowych benzyny zawierającej 10% obj. etanolu oraz oleju napędowego z estrami metylowymi kwasów tłuszczowych. W czasie ich magazynowania poddano analizie takie właściwości paliw jak odporność na utlenianie, zawartość żywic oraz stabilność magazynowa. Wszystkie badania były prowadzone zgodnie z obowiązującą metodyką. Wyniki badań posłużyły do wytypowania parametrów jakościowych paliw, które mogą być wstępnym wyznacznikiem postępującego procesu degradacji paliwa.
The research project undertaken an analysis of the aging petrol containing 10% vol. ethanol and diesel with methyl esters of fatty acids. At the time of storage were analyzed fuel properties such as resistance to oxidation, gums content and storage stability. All studies were conducted in accordance with the current methodology. The results were used for prediction of quality parameters of fuels, which may be a preliminary indicator of a progressive degradation of the fuel.
Źródło:
Chemik; 2011, 65, 6; 525-530
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Case Study on the Unavailability of a Ship Propulsion System under Aging Effects and Maintenance
Autorzy:
Okazaki, T.
Powiązania:
https://bibliotekanauki.pl/articles/117350.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
vessel exploitation
unavailability of a ship propulsion system
ship propulsion
ship propulsion system
aging effects
ship maintenance
GO-FLOW
fuel consumption
Opis:
Unavailability of a ship propulsion system under aging effects and proper maintenance is estimated using GO-FLOW. GO-FLOW is an effective software tool for the unavailability analysis of complex systems. Aging effects are incorporated into GO-FLOW using a time-dependent technique and assuming a linear aging model. The results show that the aging effects and improper maintenance can potentially increase the frequency of accidents due to a malfunction of the propulsion system by a factor of three.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 3; 501-508
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie stabilności oksydacyjnej olejów napędowych
Experimental testing of oxidation stability of diesel fuels
Autorzy:
Baczewski, Kazimierz
Szczawiński, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/210269.pdf
Data publikacji:
2019
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
inżynieria mechaniczna
paliwa silnikowe
olej napędowy
stabilność oksydacyjna
starzenie olejów napędowych
mechanical engineering
engine fuels
diesel fuel
oxidation stability
aging of diesel fuels
Opis:
W artykule przedstawiono krótką analizę problemów stabilności oksydacyjnej olejów napędowych, opisano czynniki determinujące tę stabilność oraz metody jej badań. Podano wyniki badań stabilności oksydacyjnej próbek oleju napędowego bazowego, handlowego oraz mieszanin oleju napędowego bazowego i estrów metylowych oleju rzepakowego. Badano wpływ rodzaju paliwa oraz działanie tlenu, ciepła, światła i obecności wody na zmianę stabilności oksydacyjnej badanych paliw. Stwierdzono, że decydujący wpływ na zmianę właściwości funkcjonalnych badanych paliw ma działanie tlenu z powietrza i ciepła, a w niewielkim stopniu obecność wody.
The article presents a short analysis of oxidation stability problems of diesel fuels, it describes the factors determining this stability and methods of its research. The results of investigations of base diesel fuel oxidation stability, commercial diesel fuel, basic diesel fuel, and rapeseed methyl ester mixtures are given. The effect of the fuel type and the influence of oxygen, heat, light, and the presence of water on the change of oxidation stability of the examined fuels was investigated. It was found that the decisive influence on the change of functional properties of the tested fuels has the effect of air and heat, and to a small extent the presence of water.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2019, 68, 4; 15-28
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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