传导冷却珀尔贴电流引线的传热分析  

Heat transfer anysis for conduction-cooled Peltier current leads

作　　者：陈桂新 王银顺[1,2] 皮伟[2] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]华北电力大学高电压技术与电磁兼容北京市重点实验室,北京102206

出　　处：《低温工程》2015年第5期58-63,共6页Cryogenics

基　　金：国家自然科学基金资助项目(51477053);北京市自然科学基金资助项目(2144056);中央高校基本科研业务费专项资金资助项目(2014ZD02);北京高等学校青年英才计划项目(YETP0698)资助

摘　　要：连接超导装置和外部电源的电流引线,是制冷系统的主要漏热源,决定着超导装置的运行效率。为实现漏热的最小化,对珀尔贴电流引线(Peltier current lead,简称PCL)进行了传热分析;引入热电参数的温度特性,建立了PCL的二维模型;采用有限元法对传导冷却下的PCL进行漏热分析与结构优化,得到了电流引线的最优几何参数。分析发现引线室温端的漏热大约为低温端的2倍;忽略热电参数的温度特性将使几何参数偏离最佳值,造成额外的制冷负荷。Current leads,a connecting superconducting devices at cryogenic temperature with power source at room temperature,are the major heat leak source during operation,determining the operating efficiency of superconducting devices. With considering its thermoelectric property,a two-dimensional model of the conduction-cooled Peltier current lead（ PCL） was established and optimized in order to achieve the minimum heat leakage by using finite-element simulation. The results showed that room-temperature heat leakage was about double of low-temperature one at ends of current leads; the geometric parameters would deviate from the optimal value if temperature characteristics of thermoelectric parameters were ignored,which led to extra cooling load.

关 键 词：珀尔贴电流引线 温度特性 优化设计 漏热 

分 类 号：TB663[一般工业技术—制冷工程]