主动蓄冷室温磁制冷机制冷能力的简易解析计算方法  

A simple method of analytical calculation of cooling power for magnetic refrigerator with active magnetic regenerator

作　　者：靳慧[1] 徐小农[1] 卢定伟[1] 古海明[2] 

机构地区：[1]南京大学物理学院,南京210093 [2]美国宾夕法尼亚州立大学电子工程系宾夕法尼亚州16802

出　　处：《低温工程》2013年第5期37-40,45,共5页Cryogenics

基　　金：高科技研究和发展项目(863)(2011AA03A404)支持

摘　　要：提出了一种主动磁蓄冷室温磁制冷机的制冷量解析计算的简易方法,并以此方法计算了理想线性温度场情况下的制冷量,得到了对制冷量有影响的参量间的关系。研究发现每个周期的制冷能力和磁制冷剂磁热效应引起的绝热温度变化的平方成正比,或者说,和磁制冷剂的绝热温度变化与绝热熵变的乘积成正比;此外和主动式磁蓄冷机工作床的温度跨度成反比。在线性温度场的理想情况下,体积热容量较低的热交换流体在一定程度上有利于制冷量的提高。A simple method of analytical calculation of cooling power for the magnetic refrigerator （MR） was proposed with active magnetic regenerator （AMR） , and the cooling power of the AMR was calcuated with an ideal linear temperature field. The cooling power depends on the parameters concerned was revealed. It is found that the refrigerating capacity per cycle is proportional to the square of the adiabatic temperature change induced by magnetocaloric effect （MCE） of magnetic refrigerant, or in other words, proportional to the product of adiabatic temperature change and isothermal entropy change of magnetic refrig- erant. In addition, the cooling capacity is also inversely proportional to temperature span of the AMR bed. At last, heat exchange fluid with low specific heat per unit volume is preferred for the AMR.

关 键 词：主动蓄冷 线性温度场 制冷量 磁热效应 解析计算 

分 类 号：TB66[一般工业技术—制冷工程] TB61