期刊
APPLIED THERMAL ENGINEERING
卷 183, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2020.116185
关键词
Magnetocaloric effect; First-order material; Magnetic refrigeration; Regenerator; Lanthanum alloys
资金
- EMBRAPII [201813442]
- CAPES (Talents for Innovation Program) [88887.194773/2018-00]
- National Institutes of Science and Technology (INCT) Program (CNPq) [443696/2014-4]
- National Institutes of Science and Technology (INCT) Program (FAPESC) [2018TR1576]
- CODEMGE
The study thoroughly characterized a commercially accessible La(Fe,Mn,Si)(13)H-y material in terms of its magnetocaloric properties and thermal-hydraulic performance in an Active Magnetic Regenerator (AMR) device. The regenerator bed built from epoxy-bonded spheroidal particles showed excellent mechanical integrity and reached zero-span specific cooling capacities as high as 300 W kg(-1). Results from a 1-D two-temperature approach AMR model predicted the performance data with average deviations smaller than 7% for the zero-span specific cooling capacity and 5% for the AMR pressure drop.
Magnetic cooling has been researched as an alternative near room-temperature refrigeration technology for the past two decades. However, one of its greatest limitations is the lack of materials which can be properly shaped for optimal thermal-hydraulic performance while maintaining a substantial magnetocaloric effect at moderate fields (i.e., between 1 and 2 T) and remaining mechanically (and chemically) stable. In this paper, we thoroughly characterized a commercially accessible La(Fe,Mn,Si)(13)H-y material (available as spheroidal granules), in terms of its magnetocaloric properties and thermal-hydraulic performance in an Active Magnetic Regenerator (AMR) device. The regenerator bed built from epoxy-bonded spheroidal particles endured dozens of hours of operation in AMR cycles without any noticeable degradation of their mechanical integrity, thanks to a comparatively larger alpha-Fe content and granule porosity. As for the magnetic cooling performance, the AMR reached zero-span specific cooling capacities as high as 300 W kg(-1). A 1-D two-temperature approach AMR model predicted the performance data with average deviations smaller than 7% for the zero-span specific cooling capacity and 5% for the AMR pressure drop.
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