In order to design for a particular application and before the AMR refrigeration cycle can be created, it is necessary to selection and determine for many requirements.
Choosing of the system configurations includes type of magnetocaloric material, geometry of the regenerator, number of beds and the magnet device. Likewise, the morphology of regenerator (particles, spheres, …show more content…
On the other hand, its assembly in which the flux density can be altered by a mechanical operation often significantly small and also requires no electrical power to operate …show more content…
So, the cost of such magnets and the rather small volume available for the regenerator make this unrealistic in a large scale device .
The most powerful permanent magnet available today, made of an alloy of Neodymium, Iron and Boron. Currently, this magnet seems the strongest, due to the highest maximum energy product which be one of crucial parameters for the selection of a permanent magnet.
The choosing for Halbach cylinder permanent magnet, made of NdFeB, due to, it seems an interesting magnet, able to generate a homogeneous flux density, and well-defined geometrically, its dimensions can easily be adapted to our wanted experiments, also, formed the basis of many magnet designs used in magnetic refrigeration prototypes. Magnetic Refrigeration Device Configuration selection:-
As mentioned, the most consistently reported classification of devices, grouped into two types, rotary and reciprocating. Thus, each type has its advantages and disadvantages. Some of difficulties associated with both design and construction of an AMRR included: Large magnetic forces. Operating frequency.