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Wyszukujesz frazę "engine availability" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Relative Change in SI Engine Performance Using Hydrogen and Alcohol as Fuel Supplements to Gasoline
Autorzy:
Yamin, Jehad A.A.
Sheet, Eiman Ali Eh
Rida, Khalid S.
Powiązania:
https://bibliotekanauki.pl/articles/2024183.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
hydrogen
fuel blend
ethanol
engine availability
engine performance
emissions
lean mixture
entropy
wodór
mieszanka paliwowa
etanol
dostępność silnika
osiągi silnika
emisja
mieszanka uboga
entropia
Opis:
A simulation study on the effect of hydrogen and ethanol addition as supplementary fuel for gasoline engine at lean mixture (equivalence ratio ϕ = 0.8) was carried out to reduce the gasoline share in the mixture, thus reducing the fuel consumption and harmful emissions. The effect of supplementary fuels on engine performance, emissions, and availability was investigated. This was done by changing the ratio between gasoline and the supplementary fuels in the fuel mixture to achieve the required equivalence ratio. The first part of the simulation consisting of the performance and emissions calculated using the first law, was conducted for all engine speeds. The second part consisting of an availability analysis was conducted at the rated speed of 2750 rpm. The simulation study was conducted using the data obtained from measurements of Ricardo E6/T engine parameters (variable compression ratio engine). The data was also used to verify the models. The study shows that the hydrogen addition reduced the carbon monoxide (CO) and nitrogen oxides (NO2) share at the lean mixture. The hydrogen addition significantly improved the heat release rate compared with pure gasoline; however, the heat released was close to the top dead center due to its fast burning speed. The ethanol addition improved the first law performance of the engine, e.g., power and efficiency; however, at the cost of increased heat loss. It also improved the indicated work availability in comparison with the addition of hydrogen.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 1; 144-145
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the influence of preventive maintenance on the reliability and availability indexes of diesel locomotives
Autorzy:
Szkoda, Maciej
Kaczor, Grzegorz
Pilch, Robert
Smolnik, Maksymilian
Konieczek, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2203843.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
preventive maintenance
diesel engine locomotive
availability assessment
reliability assessment
konserwacja zapobiegawcza
lokomotywa spalinowa
ocena dostępności
ocena niezawodności
Opis:
The article investigates the influence of preventive maintenance on the reliability and availability indexes of the railway means of transport, which also determine the economic aspects of their operation and maintenance. The research was done using the method based on fault tree analysis (FTA) and Monte Carlo simulation. The authors performed a cause and effect analysis of the occurrence of undesirable events during the operation of selected vehicles. They identified the weakest components of the rail vehicle that affect the downtime and mean availability most significantly. Specialized software including Weibull++, BlockSim, and MiniTab aided calculations were used to illustrate the application of the results of a modernization project involving a 6Dg diesel locomotive, carried out in cooperation with the biggest Polish rail carrier. The applicability of the proposed tools has been verified on the example of a selected sample of 75 diesel locomotives employing data on their use and maintenance acquired in the real operation process. The obtained results indicate that the proposed approach can be particularly useful in practice when assessing the applied rail vehicle maintenance strategy, and while developing new strategies and selecting the best one to implement.
Źródło:
Transport Problems; 2021, 16, 1; 5--18
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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