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Wyświetlanie 1-3 z 3
Tytuł:
Evaluation of applied provisions and technologies on ship emission and air quality
Autorzy:
Pawlak, M.
Powiązania:
https://bibliotekanauki.pl/articles/243593.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
exhaust emission
marine engines
air pollution
modelling
Opis:
Although perceived as the most environmentally friendly means of transport, ships are a significant source of pollution to the environment. The vast majority of emissions in EU sea areas are emitted from cargo ships over 500 GT. About 45% of all emissions come from EU flagged ships and approximately 20% of emissions are emitted within the 12-mile limit of territorial seas. In port cities, ship emissions are in many cases a dominant source of pollution and need to be addressed when considering compliance with legally binding air quality objectives. Moreover, emissions from ships travel over hundreds of kilometres and can thus contribute to air quality problems on land even if they are emitted at sea. This is particularly relevant for the deposition of sulphur and nitrogen compounds, which cause acidification of natural ecosystems and threaten biodiversity through excessive nitrogen inputs. Emission of toxic compounds in marine engines exhausts is limited by international legal provisions, namely MARPOL convention, which in Annex VI sets limits to SOx and NOx emissions and designates special areas where the limits are stringent. To comply with the provisions, marine vessels need to be equipped with installations reducing emissions to permissible levels or turn to alternative fuels. The paper presents evaluation of impact of those having been in force for the last decade limitations as well as of applied new technological solutions on improvement of air quality. The analysis was conducted for the Baltic Sea, based on available data on ship traffic in the area and emission factors.
Źródło:
Journal of KONES; 2016, 23, 4; 381-388
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An application of artificial neural network to exhaust emission modelling from diesel engine
Autorzy:
Reszka, K.
Rakoczy, J.
Morgiel, J.
Powiązania:
https://bibliotekanauki.pl/articles/242238.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
road transport
simulation
combustion engines
air pollution
environmental protection
Opis:
Processes of the combustion of liquid fuels and solid are more complex than combustion of fuel gases. With reference to liquid fuels occur additionally processes of vaporization of the fuel, and with reference to solid fuels - decomposition of the solid phase with processes of melting and vaporization, pyrolysis, or gasification. This simultaneous and also different influence of different parameters is sometimes a reason of incorrect interpretation of experimental results. The study of the theoretical model of the combustion process concerning of liquid and solid fuels and which then the model takes into account also the gas- phase, because combustion processes take place in this phase, and occurs the interaction of the phase gas- and liquid or the solid one. The theoretical model is presented basing on experimental initial researches realized in a model with reference to liquid fuels and solid ones. Researches realized in the constant volume chamber with measurements of the pressure during the process of the combustion with the use of quick photography and with measurement of the distribution of the velocity in the spray of the fuel and droplet measurements by means the laser Doppler equipment LDV and PDPA. There were obtained a good agreement of findings experimental researches with the theoretical model. Generally on the combustion velocity of liquid fuels and solid one significant influence has a kind (laminar, temporary and turbulent) and the thickness of the thermal boundary layer.
Źródło:
Journal of KONES; 2011, 18, 2; 365-367
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling Hydrocarbons Cold-Start Emission from Passenger Cars
Autorzy:
Laskowski, Piotr
Zasina, Damian
Zimakowska-Laskowska, Magdalena
Orliński, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2123276.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
air pollution
road transport
hydrocarbon emissions
cold start
Opis:
The aim of this paper is to present the results of mathematically modelling the influence of ambient temperature on hydrocarbons (HCs, comprised of methane and non-methane volatile organic compounds) in cold-start emissions from passenger cars (PCs) for different fuel types, vehicle segments including hybrid vehicles, and the Euro standard. In this article the simulations are performed using COPERT software, assuming ambient temperatures from 20◦C to +30◦C, with 5◦C intervals. The modelling results presented show that a change in ambient temperature has a significant effect on hydrocarbons in cold-start emissions. Furthermore, our results show that hydrocarbons emissions are sensitive to ambient temperature fluctuations, and dependent on fuel type, vehicle segment, and the Euro standard.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 3; 117--125
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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