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A new technique for reducing extremely low frequency magnetic field emissions affecting large building structures

Author

Listed:
  • E. Salinas

    (London South Bank University)

  • J. Atalaya

    (Chalmers University Of Technology)

  • Y. Hamnerius

    (Chalmers University Of Technology)

  • C. J. Solano

    (Universidad Nacional De Ingeniería)

  • D. Gonzales

    (Universidad Nacional De Ingeniería)

  • C. Contreras

    (Universidad Nacional De Ingeniería)

  • C. Leon

    (Universidad Nacional De Ingeniería)

  • M. A. Sumari

    (Universidad Nacional De Ingeniería)

  • S. Dimitriou

    (London South Bank University)

  • M. Rezinkina

    (National Polytechnic University (KPI))

Abstract

When large structures such as residential compounds or public buildings are under the influence of extremely low frequency (ELF) magnetic fields, such as the one generated by a system of railways fed by 16.67 Hz, standard methods of designing shielding structures by numerical methods usually fail. The latter can be explained by the difficulty posed in the computing process by the large aspect ratios involved due to thin layers of metal (a few millimetres or centimetres) in contrast to the large dimensions of the affected structure (several tens of meters). In some cases one has to utilize special approximations such as surface conductivity, which are not easy to handle when the designed shielding structure is clearly three -dimensional. Other alternatives such as experimentation in situ are very costly. Here, a new technique is presented of mitigating the field by using three-dimensional propagation of induced currents optimizing the field reduction factors and minimizing the cost of shielding material. The particular designing method is a hybrid of numerical simulations combined with lab experimentation using scaled models of the large structure. The method is rather cost-effective and flexible as various designs can be easily tested. Results are presented in the form of magnetic field values, at various locations in the buildings, before and after this mitigation technique is applied.

Suggested Citation

  • E. Salinas & J. Atalaya & Y. Hamnerius & C. J. Solano & D. Gonzales & C. Contreras & C. Leon & M. A. Sumari & S. Dimitriou & M. Rezinkina, 2007. "A new technique for reducing extremely low frequency magnetic field emissions affecting large building structures," Environment Systems and Decisions, Springer, vol. 27(4), pages 571-576, December.
    • Handle: RePEc:spr:envsyd:v:27:y:2007:i:4:d:10.1007_s10669-007-9061-4
    DOI: 10.1007/s10669-007-9061-4
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    Cited by:

    1. Ener Salinas & Marina Rezinkina & Juan Atalaya, 2009. "Some 2D–3D aspects of shielding of longitudinal sources of extremely low frequency magnetic fields," Environment Systems and Decisions, Springer, vol. 29(2), pages 141-146, June.
    2. Jiameng Yang & Wenfang Zhang & Liang Zou & Yali Wang & Youliang Sun & Yingchun Feng, 2019. "Research on Distribution and Shielding of Spatial Magnetic Field of a DC Air Core Smoothing Reactor," Energies, MDPI, vol. 12(5), pages 1-15, March.

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