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Design and Fabrication of a Magnetocaloric Microcooler

[+] Author Affiliations
Sangchae Kim, Bharath Bethala, Simone Ghirlanda, Shekhar Bhansali

University of South Florida

Senthil N. Sambandam

Fisk University

Paper No. IMECE2005-82720, pp. 763-767; 5 pages
doi:10.1115/IMECE2005-82720
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Microelectromechanical Systems
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Microelectromechanical Systems Division
  • ISBN: 0-7918-4224-X | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

Magnetocaloric refrigeration is increasingly being explored as an alternative technology for cooling. This paper presents the design and fabrication of a micromachined magnetocaloric cooler. The cooler consists of fluidic microchannels (in a Si wafer), diffused temperature sensors, and a Gd5 (Si2 Ge2 ) magnetocaloric refrigeration element. A magnetic field of 1.5 T is applied using an electromagnet to change the entropy of the magnetocaloric element for different ambient temperature conditions ranging from 258 K to 280 K, and the results are discussed. The tests show a maximum temperature change of 7 K on the magnetocaloric element at 258 K. The experimental results co-relate well with the entropy change of the material.

Copyright © 2005 by ASME
Topics: Manufacturing , Design

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