高温超导磁悬浮环形杜瓦的漏热分析

摘要

对高温超导磁悬浮环形杜瓦进行了漏热分析.在杜瓦内部采用真空多层绝热结构,并在整个外表面包裹了玻璃微纤维深冷绝热纸,工艺简单,绝热效果良好.通过传热学理论分析和计算,得到杜瓦的漏热量及液氮的损耗量.结果表明,固体传导漏热为主要的漏热来源,液氮维持的时间能达到技术要求的10小时,整个杜瓦装置的绝热性能良好.%Heat leakage analysis of annular dewar for HTSC test system was discussed in this paper. The dewar adopted the structure of vacuum adiabatic multilayer inside, and totally wrapped up with micro glass fiber cryogenic insulation paper in outer surface, which had simple technology and good adiabatic effect . This text calculated the heat leakage of dewar and the liquid nitrogen wastage theoretically from the heat transfer theory. The results show that solid conducting heat leakage is the main source of heat leakage and the liquid nitrogen can remain more than ten hours as the technique requirements. The thermal insulation performance of the annular dewar proposed in this paper can meet the technical requirement.