Design Issues and Future Perspectives for Magnetocaloric Energy Conversion - Magnetocaloric Energy Conversion: From Theory to Applications - page 338

Fig. 8.10 Four-pole opened magnet assembly for the axial rotary magnetocaloric device principle
with eight beds of AMR, classi cation no: R20(3)0(5)(6)0(8)111(12)

Fig. 8.11 a Two-pole closed magnet assembly for the axial rotary magnetocaloric device
principle with eight beds of AMR, classi cation no: R20(3)0(5)(6)0(8)111(12), b two-pole closed
magnet assembly for the axial rotary magnetocaloric device principle with eight beds of AMR a
simple permanent magnet conguration no: R20(3)0(5)(6)0(8)111(12)

of the magnetic ciency of a device), whereas

the case in Fig. 8.11 b provides a cheaper solution, which will in most cases also
lead to a lower magnetic

fl ux density and consequently the ef

fl ux density in the high magnetic eld region.

8.2.1.2 Radial Rotary Magnetocaloric Devices with Rotating AMRs

In radial devices, the working uid is usually applied from the central axis of the

rotation, from where it is distributed by the valve system. Figure 8.12 shows an
example of applying the

fl

magnet assembly. This is also a more common
option for radial devices compared to a closed magnet assembly. However, imagine
that the magnet assembly is constructed as a 3D magnet assembly (where the AMR
is sandwiched between the upper and lower blocks of the magnet assembly). In this

“ opened ”