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    Wyświetlanie 1-2 z 2
    Tytuł:
    The surface structural and mechanical properties of the amorphous CO22Y54AL24 ribbon
    Autorzy:
    Bukowska, A.
    Pietrusiewicz, P.
    Zdrodowska, K.
    Szota, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/102533.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    amorphous alloy
    melt-spinning
    ribbons
    Opis:
    The aim of this study was to manufacture amorphous Co22Y54Al24 alloy in a form of thin ribbons and to investigate their properties. The investigated ribbons were prepared by rapid solidification of molten metal on a rotating copper cylinder (melt-spinning). In order to obtain the material with amorphous structure, the cooling rate of the liquid alloy should vary in a range from 104 to 106 K/s. The microstructure studies were performed using X-ray diffractometery. The mechanical properties were investigated by metallographic studies, micro-hardness and tribological resistance tests moreover the surface roughness profile were analyzed. All studies were performed for two sides of tapes, since the differences in ribbons surface, related with manufacturing process, are clearly visible. The surface from the bottom (drum side) was glossy and from the top side it was shiny.
    Źródło:
    Advances in Science and Technology. Research Journal; 2013, 7, 19; 1-4
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Well-being approach of a power system containing run-of the-river power plants
    Autorzy:
    Khalilzadeh, E.
    Fotuhi-Firuzabad, M.
    Ehsan, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/102569.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    uncertainty
    water flow
    operating reserve
    run-of the-river (ROR)
    power
    plants
    spinning reserve
    well-being approach
    Opis:
    Renewable energies especially Run-Of the-River (ROR) power plants are increasingly used for the electricity generation in the power systems. The uncertain and intermittent nature of these plants arisen from variability of water flow, however, has led to some problems in their integration to power systems. Thus, the operating reserve requirement in a power system containing large ROR plants is a main challenge, which has to be addressed properly. In this way, this paper presents an analytical approach to determine the adequate spinning reserve based on the well-being approach during the system operation. The reliability model based on the components failures and uncertainty nature of water flow is introduced for ROR plants operation studies. This approach not only evaluates the interaction between these energies and conventional units, but also determines the contribution that ROR power plants can make in load carrying capability of a power generating system. Two reliability test systems, utilized from water flow data of Sheshpir River in Iran, are examined to demonstrate the effectiveness of the proposed model.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 4; 1-10
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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