Overview of Existing Magnetocaloric Prototype Devices - Magnetocaloric Energy Conversion: From Theory to Applications - page 272

Table 7.3 A reciprocating prototype designed by Toshiba Corporation
Name and address of institute Corporate Research and Development Center, Toshiba

Corporation 1, Komukai-Toshiba-cho, Saiwai,
Kawasaki, 212-8582, Japan

Name of contact person/email Akiko Takahashi Saito/[e-mail]

Year of production 2006

Type Linear

Maximum frequency 1 Hz

Maximum cooling power N/A

Maximum temperature span 46 K

Type of AMR Packed bed with spherical particles, (also tested

with parallel Gd plates)

MC material(s) Gd, Gd alloys, La Fe Si based

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Type of magnets Halbach-type permanent magnet (Nd - Fe - B)

'

an Jiaotong University presented experimental results on the
operation of the reciprocating magnetic refrigeration prototype in Yu et al. [ 16 ] and
Gao et al. [ 18 ]. The testing device consisted of a moving AMR and a water-cooled
electromagnet, which induced a magnetic

Researchers from Xi

uid was
water. In this experiment three different AMRs were tested. The two of those were
packed-bed AMRs,

eld of 2.18 T. The heat-transfer fl

lled with gadolinium particles with average diameters of 0.3
and 0.56 mm. The masses of the AMRs were 930 and 1,109 g, respectively. The
third AMR consisted of 1,213 g of Gd Ge particles with average diameters

ranging between 0.3 and 0.75 mm. Using the AMR with Gd particles of 0.3 mm
diameter, a speci

Si

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c cooling power of 20.2 W kg − 1 at 3 K of temperature span was
obtained. In the case of the AMR

lled with Gd particles with a diameter of

c cooling power was 16.1 W kg − 1 at a temperature span of 3 K.
The lowest performance was obtained with the Gd

0.56 mm, the speci

Si Ge-based AMR, where the

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c cooling power was 8.5 W kg − 1 for a temperature span of 3 K.

speci