摘要
在旋转永磁体复合室温磁制冷机基础上,对系统进行了改进,并且进行了实验研究。改进之处在于:1)将回热器填料由不规则的钆屑改为厚度为1 mm宽度为5 mm的钆条,钆条之间缝隙为0.5 mm的规则回热器填料;2)将驱动电机外置;3)在冷端换热器与膨胀腔之间加装热缓冲管.改进之后的实验系统分析了交变流动工质的系统工作频率对磁制冷机性能的影响,对比了改进前后系统的实验结果,实验结果表明,改进之后的复合式室温磁制冷机在相同实验条件下明显优于改进前,在优化系统频率条件下,可以获得-16.5℃的最低无负荷制冷温度,以及12.5 K温差下58 W的最大制冷量.
The experimental prototype was improved based on hybrid magnetic refrigeration system in room temperature by rotating permanent magnets. Experimental tests were carried out to measure the cooling performance of this hybrid prototype. Improvement 1） Using regular gadolinium sheets instead of irregular gadolinium chips as regenerative matrix; 2） Laying out the electric motor from inside to outside; 3） Adding a thermal buffer tube between the cold heat exchanger and expansion chamber. The influence of operating frequency of oscillating gas on the cooling performance was investigated. Comparison was made between the experimental researches of before and after im- provements on hybrid magnetic refrigerator with the experimental results. The experimental results show that after improving the system, the cooling performance of hybrid magnetic refrigerator was better than that before improvement under same experiment conditions. The lowest no load cool- ing temperature of -16.5℃ and cooling power of 58 W over temperature span of 12.5 K were obtained.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2013年第11期1997-2000,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50976121)
关键词
规整填料
热缓冲管
磁制冷机
regular regenerative matrix
thermal buffer tube
magnetic refrigerator
