Overview of Existing Magnetocaloric Prototype Devices - Magnetocaloric Energy Conversion: From Theory to Applications - page 315

Table 7.33 First rotary magnetic prototype from the University of Ljubljana
Name and address of institute Laboratory for Refrigeration and District Energy,

Faculty of Mechanical Engineering, University
of Ljubljana, Askerceva 6, 1000 Ljubljana, Slovenia

Name of contact person/email Andrej Kitanovski/[e-mail]

Year of production 2007

Type Rotary

Maximum frequency 4 Hz

Maximum cooling power N/A

Maximum temperature span N/A

Type of AMR Parallel plates

MC material(s) Gd

Type of magnets Permanent Nd - Fe - B, 0.05 - 0.98 T

speci c cooling load was applied, operating at 1 Hz, the temperature span achieved

was 8.9 K. Under these operating conditions the COP was 1.8, while the Carnot COP
was 32.4, which corresponded to 5.6 % of the Carnot ef c

cooling load was decreased to 71.4 W kg − 1 , the temperature span increased to
15.4 K. At this point the COP and Carnot COP decreased to 0.8 and 18.3, respec-
tively. This corresponded to a Carnot ef

ciency. When the speci

ciency of 4.4 %. When operating at fre-
quencies over 2 Hz a gradual decrease in the device performance was reported.