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Wyszukujesz frazę "current-carrying capacity" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
New Al-Ag Alloys for Electrical Conductors with Increased Current Carrying Capacity
Autorzy:
Mamala, A.
Knych, T.
Kwaśniewski, P.
Kawecki, A.
Kiesiewicz, G.
Sieja-Smaga, E.
Ściężor, W.
Gniełczyk, M.
Kowal, R.
Powiązania:
https://bibliotekanauki.pl/articles/353878.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
new Al-Ag alloys
electrical conductors
increased current carrying capacity
Opis:
The paper shows a new idea of aluminium alloys. New alloys with specially selected alloying element i.e. silver have electrical conductivity similar to pure aluminium at ambient temperature and better than pure aluminium electrical conductivity at increased temperatures. Al-Ag alloys for electrical applications (mainly for electrical conductors) due to high electrical conductivity at increased temperatures at the level of the maximum conductor working temperatures give possibility of better current capacity of conductors. The experimental results of basic mechanical properties and the electric conductivity versus temperature relation are shown in the paper as well as examples of the tested material operational properties. The summary gives theoretical analysis based on examples of the potential applications of Al-Ag alloys (new conductor designs) which provide the benefits of the new solutions in comparison to traditional conductors.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 4; 1875-1880
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of thermal backfill parameters on current-carrying capacity of power cables installed in the ground
Autorzy:
Szultka, Seweryn
Czapp, Stanisław
Tomaszewski, Adam
Powiązania:
https://bibliotekanauki.pl/articles/27311442.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
current-carrying capacity
numerical simulations
power cables
thermal analysis
obciążalność prądowa
analiza termiczna
symulacja numeryczna
kabel zasilający
Opis:
Proper design of power installations with the participation of power cables buried in homogeneous and thermally well-conductive ground does not constitute a major problem. The situation changes when the ground is non-homogeneous and thermally low-conductive. In such a situation, a thermal backfill near the cables is commonly used. The optimization of thermal backfill parameters to achieve the highest possible current-carrying capacity is insufficiently described in the standards. Therefore, numerical calculations based on computational fluid dynamics could prove helpful for designers of power cable lines. This paper studies the influence of dimensions and thermal resistivity of the thermal backfill and thermal resistivity of the native soil on the current-carrying capacity of power cables buried in the ground. Numerical calculations were performed with ANSYS Fluent. As a result of the research, proposals were made on how to determine the current-carrying capacity depending on the dimensions and thermal properties of the backfill. A proprietary mathematical function is presented which makes it possible to calculate the cable current-carrying capacity correction factor when the backfill is used. The research is expected to fill the gap in the current state of knowledge included in the provisions of standards.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 3; art. no. e145565
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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