摘要
研究了脉冲磁场作用下磁工质粉末与水高热流密度小温差强化传热,提出了在工质轮中嵌入高导热材料强化传热的方法,采用建立理论模型与Ansys软件相结合的方法,对几种典型嵌入形式进行了模拟分析,结果表明,铜丝的交叉排列最有利于温度的均匀分布,在高转速运行下磁制冷机铜丝网的强化换热作用明显。铜丝数量的增加导致Gd工质质量减少,从而导致磁致热效应的减少,铜丝数量、磁热效应以及制冷效率之间存在最优值。
The large heat flux and small temperature difference heat transfer behavior between the magnetic material and water were numerically investigated under the effect of pulse magnetic field. A method of set copper wires＇ in active magnetic regenerator（ AMR） aiming to enhance heat transfer was studied. Simulation and analysis of several typical insert ways of copper wires distribution were described in details. The resuh indicated that copper wires intersecting to each other was the best way for temperature field uniform distribution, heat transfer obviously improved on condition of high rotary velocity and it was feasible to use copper wires to enhance heat transfer in AMR bed. The carrot magnetic effect would decrease as the copper wires number increase. There should be an optimum value taking the copper number, carrot magnetic effect and refrigeration efficiency into account.
出处
《低温工程》
CAS
CSCD
北大核心
2008年第6期1-6,共6页
Cryogenics
基金
国家863项目(2007AA03Z440)
国家重点基金(50731007)
广州市科技计划项目(2007Z2-D0231)资助
关键词
主动式磁回热器(AMR)
铜丝
旋转式磁制冷机强化传热
active magnetic regenerator（AMR） temperature
heat transfer enhancement
copper wires
rotary magnetic refrigeration for room
