—There is currently a global demand for highly-efficient and environmentally-friendly refrigeration techniques. The new concept of active magnetic regenerative (AMR) refrigeration has received much attention as a potential alternative to conventional gas expansion cooling. In the present study, Gd alloys and La(Fe,Si)13
-based compounds, both of which have been considered as likely candidates for solid magnetic refrigerants, were investigated in terms of their cooling properties in an AMR-cycle system. As a results, feature of the cooling properties with both materials were clarified. The Gd alloys are evidently suitable for the generation of large temperature differences, in contrast to the La(Fe,Si)13-based compounds, which exhibit good heat-load properties. Numerical calculations support these experimental results and indicate that multi-layered structures composed of the La(Fe,Si)13
-based compounds with gradually varying Curie temperatures are effective at increasing the temperature difference and also demonstrate good heat-load properties. The optimization of magnetic refrigerants such as these is expected to result in new environmentally-friendly cooling systems.
—Environmentally-friendly, magnetic refrigeration, magnetocaloric effect, solid refrigerants.
Akiko T. Saito is with the Corporate Research and Development Center, Toshiba Corporation, 1, Komukai-Toshiba, Saiwai, Kawasaki, 212-8582, Japan. She is also with the Department of Urban Environment Systems, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan (e-mail: email@example.com, firstname.lastname@example.org).
Tadahiko Kobayashi is with the Corporate Research and Development Center, Toshiba Corporation, 1, Komukai-Toshiba, Saiwai, Kawasaki, 212-8582, Japan.
Hidehito Fukuda, Ryosuke Arai, and Hideki Makagome are with the Department of Urban Environment Systems, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan (e-mail: email@example.com).
Cite: Akiko T. Saito, Tadahiko Kobayashi, Hidehito Fukuda, Ryosuke Arai, and Hideki Nakagome, "Cooling Properties of Gd Alloys and La(Fe,Si)13-Based Compounds in Active Magnetic Refrigeration for Environmentally-Friendly Cooling Systems," International Journal of Environmental Science and Development vol. 7, no. 5, pp. 335-339, 2016.