Speaker
Description
The China Fusion Engineering Test Reactor (CFETR) is envisioned to be constructed in the 2020s and start operation in the 2030s, according to the roadmap of China magnetic confinement fusion development. The updated design of the CFETR magnet system consists of 12 toroidal field (TF) and 6 poloidal field (PF) coils, a central solenoid (CS) coil stacked with 6 modules and 12 correction coils (CC). These superconducting coils (including their model or prototype coils) need to be cold tested in a coil test facility. Therefore a 5 kW @ 4.5 K helium refrigerator is being designed and analyzed in the Institute of Plasma Physics Chinese Academy of Sciences. In the present study, a 3D conceptual engineering design of the horizontal refrigerator cold box is conducted. In order to validate the feasibility and optimize the design, the thermal-mechanical analysis of the cold box is performed, including the steady state thermal analysis and thermal-mechanical coupling analysis of the components and pipes. Besides, the thermal loads of the key components due to conduction and radiation are estimated. According to these analysis results, the cold box is iteratively optimized.