关键词: HL-2M 装置；真空室；保温材料；传热分析；隔热实验 

Abstract: Based on the requirements of HL-2M baking insulation requirement, it was determined that 
ceramic fiber and nanoscale microporous material were used as insulation material for HL-2M vacuum vessel 
through finite element analysis and prototype test. It is found that the thermal conductivity of the insulation layer 
is less than 0.027W⋅m−1·℃⁻¹ at 30℃ and less than 0.038W⋅m⁻¹·℃⁻¹ at 300℃. For the chosen insulation layer of 
25mm thick, when the temperature of the hot surface is 300℃ and reaches a steady state, the cold surface can be 
controlled below 85℃, the temperature of the coil side is lower than 60℃, and the overall heat loss is less than 
12kW, which meets the baking requirements of the HL-2M vacuum vessel. 

Key words:  HL-2M tokamak, Vacuum vessel, Thermal insulation material, Thermal analysis, Insulation 
experiment