Using numerical methods to screen magnetocaloric materials in an active magnetic regenerative cycle

Ucar, Huseyin; Paudyal, Durga; Boyraz, Ozdal

doi:10.1016/j.ijrefrig.2020.08.015

Using numerical methods to screen magnetocaloric materials in an active magnetic regenerative cycle

Journal Article · Sat Aug 22 00:00:00 EDT 2020 · International Journal of Refrigeration

DOI:https://doi.org/10.1016/j.ijrefrig.2020.08.015· OSTI ID:1671359

; Paudyal, Durga; Boyraz, Ozdal

A 2-dimensional numerical model of a room temperature operating Active Magnetic Regenerator (AMR) that comprises of a regenerator, hot and cold heat exchangers, heat transfer fluid is developed. The regenerator is made of a magnetocaloric material (MCM) which heats up upon applying a magnetic field, H, and cools down when the field is removed; thus, making it the most essential part of an AMR. The model takes experimentally measured ΔT_ad(H,T) and the C_p(H,T) data as input and provides quantitative performance metrics of the magnetic cooling system, such as ΔT_span and the cooling load, as output. With this model, it is possible to assess a wide range of MCMs in an AMR. 4 different MCMs were investigated using this model in terms of their ΔT_span and the cooling loads—LaFe_10.96Co_0.97Si_1.07, MnFeP_(1-x)As_(x) and AlFe₂B₂ and Gd. During the screening of MCMs, all the important operating conditions of the device were fixed such as the fluid flow rate, ambient temperature, cycle duration, magnetic field strength. Our results indicate that Gd exhibits the maximum ΔT_span with respectable cooling load, while AlFe₂B₂ generates the lowest ΔT_span. Even though LaFeCoSi compound did not perform as well as Gd, it could be the MCM choice for the realization of magnetic refrigeration on a global scale due to its much lower cost.

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Sponsoring Organization:: USDOE Office of Science (SC); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1671359

Alternate ID(s):: OSTI ID: 1677500

Journal Information:: International Journal of Refrigeration, Journal Name: International Journal of Refrigeration Journal Issue: C Vol. 120; ISSN 0140-7007

Publisher:: ElsevierCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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