关键词: HL-3 装置, 环向场线圈, 热工分析

Abstract: The thermal analysis on the toroidal field coil of HL-3 tokamak is carried out by using COMSOL Multiphysics software. The cooling efficiency of the coil under different working conditions is studied, and the pressure, flow rate and temperature distribution of cooling water are obtained. The results show that the cooling time of toroidal field (TF) coil controlled within 900s can fully meet the requirements of the device. Under the condition of 140kA and 190kA flat top current, the maximum temperature of the coil in one discharge will not exceed 80℃, which will not damage the inter turn insulation between the coils. The main heat generation of TF coil is concentrated in the central post section. When cooling is applied to the coil, the temperature of the coil after 600s can be reduced to a lower range, and the coil can be fully cooled after 900s. The flow rate of cooling water in the internal pipe of the coil should be controlled at 2~4m·s⁻¹, and the inlet pressure cannot exceed 0.45MPa. The cooling time of TF coil can be reduced to 600s.

Key words: HL-3 tokamak, Toroidal field coil, Thermal analysis;