根据主要的永磁体材料磁化性质和可能的室温磁制冷材料的磁热性质, 利用磁路定理并假定了通常使用的循环换热流体的压力差上限来计算磁制冷功率和永磁体体积之间的关系, 进而说明室温磁制冷机的制冷量的受约束情况以及实用可能性. 通过对两种典型的磁路进行的计算对比, 发现在使用高磁场时使用中空圆柱形磁聚焦方式更有效, 而在获得低于1 T的磁场时普通的救生圈环形磁路更为有效.
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