Environmental Engineering Reference
In-Depth Information
7.1.2 Canadian Prototypes
Rowe and Barclay [ 7 ], researchers from the University of Victoria, Canada, pre-
sented their
rst prototype in 2002. The general characteristics are presented in
Table 7.2 . The device consisted of two packed-bed AMRs moving alternately in
and out of a Nb
Ti superconducting magnet, which induced a magnetic
eld of
2 T. The device operated at frequencies of 0.2
uid was
helium. The magnetocaloric material used in the AMRs was gadolinium (Gd).
Three different masses of magnetocaloric material were tested. These masses were
125, 250 and 375 g, respectively. The achieved maximum no-load temperature
spans were 13, 18 and 20 K, respectively. The device was also designed for
experiments in cryogenics, e.g., temperatures of about 20 K.
1.2 Hz. The heat-transfer
fl
-
Table 7.2 Reciprocating prototype from the University of Victoria
Name and address of institute
Mechanical Engineering, University of Victoria
Name of contact person/email
Andrew Rowe/arowe@uvic.ca
Year of production
2001
Type
Reciprocating [Compressed gas (He, N 2 ,CO 2 )0
9 atm.]
-
Maximum frequency
1 Hz
Maximum cooling power
40 W
Maximum temperature span
85 K
Type of AMR
Spheres, plates, particulate
(1 - 3 layers)
MC material(s)
Gd, Gd x Tb 1 x ,Gd x Er 1 x, Tb
Type of magnets
Superconducting, 0
5T
-
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