Thermal-Hydraulic Analysis of HL-2M Cooling Water System for Toroidal Field Coils

Abstract

Abstract HL-2M is a medium-sized copper-conductor tokamak from the Southwestern Institute of Physics (SWIP). HL-2M cooling water system is composed of Tokamak Cooling Water System (TCWS), Component Cooling Water System (CCWS), and the Heat Rejection System (HRS). The tokamak cooling water system, the primary cooling system of the tokamak machine, is further divided into TCWS-1, TCWS-2, TCWS-3, TCWS-4 depending on the water chemistry needs of clients and pressure requirements. As an important subsystem, the function of the TF coils cooling water system (TCWS-1) is to remove heat load from Toroidal Field coils. HL-2M copper TF coil is made up of 20 coil bundles, each consisting of seven turns for 140 turns, each of turns with six cooling channels for 840 cooling channels. A thermal-hydraulic model of TCWS-1 magnet coil client was established, by COMSOL Multiphysics, to conduct the transient state thermal-hydraulic analysis. The TCWS-1 cooling loop was developed, by using AFT Fathom code, to conduct the steady-state thermal-hydraulic analysis of the system. In this thermal-hydraulic analysis model, by multi-physical coupling calculations on the client and applying the results to the TCWS-1 loop calculation, more realistic results can be obtained. This paper presents the results of this thermal-hydraulic analysis which was composed of the main thermal-hydraulic parameters for TCWS-1 loop and client, including flow rate, velocities, pressure drops, and outlet temperatures. The results obtained in this study can provide support and reference to the engineering design of TCWS-1.