Abstract:
The invention relates to a magnetocaloric lattice element formed by fibres of magnetocaloric material, wherein the fibres are arranged in respective parallel lattice planes, each fibre having a respective mass of magnetocaloric material, the fibres of a given lattice plane do not contact each other but each fibre of a given lattice plane is attached to at least two fibres in a next neighbouring lattice plane, and wherein the magnetocaloric lattice element exhibits exactly one predominant mass-weighted direction of longitudinal fibre extension. When arranged in alignment of its predominant mass-weighted direction of longitudinal fibre extension with an external magnetic field, the magnetocaloric lattice element achieves an advantageous, particularly high magnetization of the magnetocaloric material, and as a consequence improves the performance of the magnetocaloric cooling device.
Abstract:
A magnetocaloric cascade containing at least three different magnetocaloric materials with different Curie temperatures, which are arranged in succession by descending Curie temperature, wherein none of the different magnetocaloric materials with different Curie temperatures has a higher layer performance Lp than the magnetocaloric material with the highest Curie temperature and wherein at least one of the different magnetocaloric materials with different Curie temperatures has as lower layer performance Lp than the magnetocaloric material with the highest Curie temperature wherein Lp of a particular magnetocaloric material being calculated according to formula (I): Lp = m * dT ad,max with dT ad,max : maximum adiabatic temperature change which the particular magnetocaloric material undergoes when it is magnetized from a low magnetic field to high magnetic field during magnetocaloric cycling, m: mass of the particular magnetocaloric material contained in the magnetocaloric cascade.
Abstract translation:包含具有不同居里温度的至少三种不同磁热材料的磁热级联,其通过降低居里温度而相继排列,其中具有不同居里温度的不同的热电材料不具有比具有最高居里的磁热材料更高的层性能Lp 其中具有不同居里温度的不同磁热材料中的至少一种具有比具有最高居里温度的磁热材料具有较低层性能Lp,其中特定磁热材料的Lp根据式(I)计算:Lp = m * dTad,max,dTad,max:特定磁热材料在磁热循环期间从低磁场磁化到高磁场时经历的最大绝热温度变化,m:包含在磁热级联中的特定磁热材料的质量。