ITER校正场过渡馈线冷质支撑的设计与传热分析

摘要

对过渡馈线的冷质支撑在真空与低温环境下的绝热性能进行研究,以增大热阻抑制热量传递为目的,在保证强度的基础上,同时考虑加工与装配的方便,确定了一种支撑结构.并利用有限元方法对该结构进行了稳态传热分析,得出了支撑的温度分布和冷量损耗大小.研究表明该支撑在满足强度的要求下,不仅结构简单、装配方便而且绝热性能良好,能很好地降低ITER制冷系统的热负载.%The heat - insulating property of cold mass support for cryostat feed through in vacuum and low temperature was studied to enlarge the thermal resistance, restrain the heat transfer, process and assemble conveniently. Finite Element Method was used to analyse the heat transfer of steady - state structure. The temperature distribution and cold capacity loss were obtained. Results show that the support is simple in structure, convenience in assembly, good in heat insulation and reduce the heat load of ITER cooling system.