磁制冷机中热交换的模拟与分析  

Simulation and Analysis of the Heat Transfer in Magnetic Refrigerator

作　　者：陈晓君[1,2] 特古斯[1] 黄焦宏[2] 松林[1] 程娟[2] 李海军[1] 

机构地区：[1]内蒙古师范大学物理与电子信息学院内蒙古自治区功能材料物理与化学重点实验室,内蒙古呼和浩特010022 [2]包头稀土研究院,内蒙古包头014030

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2013年第3期301-305,共5页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51161017;51161016);内蒙古自治区自然科学重点项目(20080404ZD09);国家863项目(2011AA03A404);国际合作项目(2011BFA53230)

摘　　要：有效的热交换是提高磁制冷机效率的重要因素.用改进的纳维-斯托克斯方程,建立了基于AMR循环原理的直线往复式磁制冷机制冷床内热交换的理论模型,并用数值计算方法模拟了以钆为工质的磁制冷循环.理论与模拟结果表明,改变热交换方程参数影响制冷效果.在模拟计算中,孔隙度取值为0.15～0.4,孔隙度越小制冷效果越好;循环频率取值为0.21～0.42Hz,频率越大制冷效果越好;传热流体速度取值为0.2～0.4m/s,流速越大制冷效果越好.Effective heat transfer is important for increasing efficiency of magnetic refrigeration. In this paper,we report on the establishment of heat transfer model based on an improved Navier-Stokes equation for the AMR cycle reciprocating magnetic refrigerator, and simulate the magnetic refrigeration cycle of Gadolinium using numerieal simulation method. The theoretical and numerical results show that the change of the heat transfer parameters can impact on cooling effect. When the porosity ranged from 0.15 to 0.4, the smaller value makes the better cooling capacity. And the cycle frequency ranged from 0.21 Hz to 0.42 Hz,the higher frequency leads to higher cooling capacity. When the fluid velocity ranged from 0.2 m/s to 0.4 m/s,the faster velocity can make the higher cooling capacity.

关 键 词：磁制冷机 热交换 制冷效果 数值模拟 

分 类 号：O482.54[一般工业技术—材料科学与工程]