Heat Transfer Considerations for DC Busbars Sizing

  • Andre Felipe Schneider
  • Tom Plikas
  • Daniel Richard
  • Lowy Gunnewiek

Abstract

The main DC busbars connecting the rectifiers to the potrooms or connecting the potrooms of a potline typically consist of several naturally cooled parallel aluminum bars. For economic optimization, busbar sizing is usually based on the minimum aluminum mass at the maximum allowable temperature. An adequate representation of the system’s heat dissipation is therefore required for the efficient and effective design of both the busbars (preventing excessive costs or overheating) and expansion joints.

To accomplish this, detailed Computational Fluid Dynamics (CFD) simulations are used to evaluate the heat losses from a tunnel enclosed group of busbars to the surroundings. In addition, a simplified calculation methodology based on semi-empirical convection correlations and analytical radiation view factors is proposed for the fast evaluation of different design parameters.

The approach is discussed in the context of potential industrial applications, for example increasing the line amperage of existing potlines, to illustrate the methodology’s value.

Keywords

Busbar Sizing Encapsulated Busbars Natural Convection Restricted Cooling Numerical Model 

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References

  1. 1.
    http://www.me.utexas.edu /~howell/tablecon.html
  2. 2.
    J. P. Holman, “Heat Transfer” — 8th Ed. McGraw-Hill (1997), 696 pages. Eq. (7–25) & Table 7–1.Google Scholar
  3. 3.
    D. R. Pitts & L. Sissom, “Schaum’s Outlines Heat Transfer” — 2nd Ed. McGraw-Hill (1998), 365 pages. Eq. (8.35) to (8.37).Google Scholar
  4. 4.
    http://www.copperinfo.co.uk /busbars/pub22-copper-for-busbars

Copyright information

© The Minerals, Metals & Materials Society 2016

Authors and Affiliations

  • Andre Felipe Schneider
    • 1
  • Tom Plikas
    • 2
  • Daniel Richard
    • 1
  • Lowy Gunnewiek
    • 2
  1. 1.HatchMontréalCanada
  2. 2.HatchMississaugaCanada

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