Campus Units

Materials Science and Engineering, Ames Laboratory

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

5-2021

Journal or Book Title

International Journal of Refrigeration

Volume

125

First Page

44

Last Page

51

DOI

10.1016/j.ijrefrig.2021.01.018

Abstract

Magnetocaloric heat pumping near room temperature, a.k.a. magnetic cooling, relies on the active regenerator cycle to achieve functional temperature spans and realize economic and societal benefits promised by this emerging solid-state cooling technology. The cycle itself depends upon synchronizing oscillating flow of a heat transfer fluid through a solid porous active material matrix, or the refrigerant, with periods when the refrigerant is in the highest available (field-on) and in nearly zero (field-off) magnetic fields to accomplish heat transfer. With this in mind, we analyze varying flow and magnetic field wave forms and the timing between when the fluid is pumped and when the magnetic field is turned on and off. We demonstrate that the volume and the cost of permanent magnet generating the field changes can be cut nearly in half with little to no effect on the device temperature span and cooling power normalized by the refrigerant mass.

Comments

This is a manuscript of an article published as Griffith, Lucas, Agata Czernuszewicz, Julie Slaughter, and Vitalij Pecharsky. "Active Magnetic Regenerative Cooling with Smaller Magnets." International Journal of Refrigeration 125 (2021): 44-51. DOI: 10.1016/j.ijrefrig.2021.01.018. Posted with permission.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Copyright Owner

Elsevier Ltd.

Language

en

File Format

application/pdf

Available for download on Monday, January 23, 2023

Published Version

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