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A Tunable Magnetomechanical Thermal Switch for Thermal Management Purposes

[+] Author Affiliations
Katherine E. Bulgrin, Y. Sungtaek Ju, Greg P. Carman, Adrienne S. Lavine

University of California, Los Angeles, Los Angeles, CA

Paper No. HT2009-88571, pp. 997-1003; 7 pages
doi:10.1115/HT2009-88571
From:
  • ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences
  • Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Heat Transfer Equipment; Heat Transfer in Electronic Equipment
  • San Francisco, California, USA, July 19–23, 2009
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4356-7 | eISBN: 978-0-7918-3851-8
  • Copyright © 2009 by ASME

abstract

This work proposes a new design for a thermal switch that exploits the temperature dependence of a ferromagnetic material situated between a hot and cold surface. A numerical model is presented which predicts the behavior of the thermal switch. It is shown that with modifications to the physical structure, the device can be tuned to turn on at different heat source temperatures. The time-averaged heat flux and effective conductance compare favorably to existing thermal switch technologies over a range of heat source temperatures. Additionally, it is shown that the contact conductance of the surfaces has a large influence on the device performance.

Copyright © 2009 by ASME

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