Special Heat Transfer Mechanisms: Active and Passive Thermal Diodes - Magnetocaloric Energy Conversion: From Theory to Applications - page 256

Fig. 6.34 Four phases of operation along the direction perpendicular to the ow (x-direction

in the Fig. 6.32 ) of the cascade magnetocaloric device with passive thermal diodes

fl uid fl

The example of a cascade magnetocaloric device with thermal diodes presented
in this subsection is just one of the possibilities for a cascade design. Here, ve MC

materials with six passive thermal diodes stacked in a cascade were presented.
However, the design allows any other number of MC materials to be used in a
cascade as well as the use of active thermal diodes. The choice of the number of
MC materials depends on the desired operating temperature span, as well as the
irreversible losses that occur at each stage. Furthermore, since each MC material
operates at a certain temperature within the operating temperature span it would be
wise to consider MC materials with different Curie temperatures.