磁布雷顿制冷机优化循环性能及参数设计  

Performance Optimization and Parametric Design of a Magnetic Brayton Refrigerator Cycle

作　　者：张后程[1] 林国星[1] 

机构地区：[1]厦门大学物理系,理论物理与天体物理研究所,厦门361005

出　　处：《制冷》2009年第4期1-5,共5页Refrigeration

基　　金：国家自然科学基金项目(No.50776074)

摘　　要：基于统计力学和磁工质的热力学性质,建立磁布雷顿制冷机循环新模型,探索热漏、有限速率热传导,绝热过程不可逆性和绝热时间等对循环性能的影响,应用对数平均温差及热力学分析方法,导出制冷率、性能系数的数学表式,并应用数值方法分析、评估磁布雷顿制冷循环的优化性能特性,所得结果为磁制冷机的优化设计和性能改善提供参数设计参考。Based on the statistical mechanics and thermodynamic properties of a magnetic working substance,a new cyclic model of magnetic Brayton refrigerator is established,in which the influence of heat leak,finite-rate heat transfer,adiabatic irreversibilities and adiabatic time are taken into account.By using the Log Mean Temperature Difference(LMTD) and thermodynamic analysis methods,the mathematical expressions of the cooling rate and coefficient of performance(COP)of the magnetic Brayton refrigerator cycle are ...

关 键 词：磁材料 布雷顿制冷循环 制冷率 性能系数 优化 

分 类 号：TB651[一般工业技术—制冷工程]