Cristin-resultat-ID: 1750709
Sist endret: 20. desember 2019 16:31
NVI-rapporteringsår: 2019
Resultat
Vitenskapelig artikkel
2019

Skin and Proximity Effects in Electrodes and Furnace Shells

Bidragsytere:
  • Egil Vålandsmyr Herland
  • Manuel Sparta og
  • Svenn Anton Halvorsen

Tidsskrift

Metallurgical and materials transactions. B, process metallurgy and materials processing science
ISSN 1073-5615
e-ISSN 1543-1916
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2019
Publisert online: 2019
Trykket: 2019
Volum: 50B
Sider: 2884 - 2897

Importkilder

Scopus-ID: 2-s2.0-85071558811

Klassifisering

Vitenskapsdisipliner

Metallurgi • Elektromagnetisme, akustikk, optikk • Matematisk modellering og numeriske metoder

Emneord

Strømfordeling • Tre-fase • Smelteovn

Finansiering

  • Norges forskningsråd
    Prosjektkode: 247791

Beskrivelse Beskrivelse

Tittel

Skin and Proximity Effects in Electrodes and Furnace Shells

Sammendrag

A review of two-dimensional (2D) analytical models of skin and proximity effects in large industrial furnaces with three electrodes arranged in an equilateral triangle is given. The models cover three different cases: one electrode only, three electrodes where two are approximated by line currents, and induced shell currents where all electrodes are approximated by line currents. The first two models show how the skin and proximity effects depend on electrode material properties and size, and the distance between the electrodes. The third model shows how the strength of the induced shell currents will depend on electrode position and furnace size. These models are compared to numerical studies including distributed electrodes and shell currents. The analytical models are accurate when induced shell currents can be disregarded. However, strong shell currents may have a significant impact on the current distribution within the electrodes. This electrode-shell proximity effect competes with the electrode-electrode proximity effect. Finally, the 2D models have been compared with three-dimensional (3D) case studies of large industrial furnaces. In 3D, the shell currents are significantly smaller than what are predicted by the 2D models, but they are sufficiently strong to cause a significant correction of the electrode current density.

Bidragsytere

Egil Vålandsmyr Herland

  • Tilknyttet:
    Forfatter
    ved NORCE Teknologi ved NORCE Norwegian Research Centre AS
  • Tilknyttet:
    Forfatter
    ved Elkem AS

Manuel Sparta

  • Tilknyttet:
    Forfatter
    ved NORCE Teknologi ved NORCE Norwegian Research Centre AS

Svenn Anton Halvorsen

  • Tilknyttet:
    Forfatter
    ved NORCE Teknologi ved NORCE Norwegian Research Centre AS
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