Study of thermal and cooling load for KSTAR thermal shield design Original Research Article

In order to derive the detailed design of cryostat thermal shield cryopanel, which plays a role to make the Tokamak Nuclear Fusion Equipment work at both stable and efficient conditions, the commercially available software package FLUENT 5.3, whose accuracy is already verified, was utilized. This study investigated the effects of thermal sources on the temperatures of lid, body, base, and EH-Port cryopanel by the numerical technique whose grid generations cover the solid and gas region of the panel. The physical model of the thermal shield cryopanel is that the 10 mm diameter of the pipe with 1 mm thickness is soldered on the stainless steel panel with 4 mm thickness. The heat fluxes to the panel are assumed to be by thermal radiation in the vacuum space and by conduction through the supporters. The inlet conditions of helium gas are 20 atmospheric pressures and 60 K temperature.