CFETR CSMC降温过程热工水力分析

Thermal-hydraulic analysis of the cooling process for CFETR CSMC

中心螺线管模型线圈(CSMC)项目是为了解决中国聚变工程试验堆(CFETR)中心螺线管线圈研发与运行过程中的关键技术问题。CSMC线圈均由带中心冷却管的管内铠装电缆(CICC)绕制,采用超临界氦迫流冷却。CSMC磁体系统的冷质量巨大,其降温过程也非常复杂。本文根据ITER修正的Katheder经验公式分析导体摩擦系数,并进行质量流量迭代运算,最后基于能量守恒原理,对CSMC磁体系统从300 K降温至4.5 K的过程进行了分析与评估。结果表明,CSMC能在400个小时之内从300 K降温至4.5 K,研究结果将为实际降温过程提供参考。

The Central Solenoid Model Coil(CSMC) project aims to solve the key technical problems in the development and operation of the central solenoid coil in China Fusion Engineering Test Reactor(CFETR).The CSMC is wound by Cable-in-Conduit Conductor(CICC) with a central spiral and cooled by supercritical helium forced flow.The cold mass of CSMC magnet system is huge,and its cooling process is also very complicated.In this paper,the conductor friction coefficient was analyzed according to the Katheder empirical formula modified by ITER,and the mass flow rate was iteratively calculated,the cooling process of the CSMC magnet system from 300 K to 4.5 K was analyzed and evaluated based on the principle of energy conservation.The results show that CSMC can be cooled from 300 K to 4.5 K in 400 hours,and the results will provide guidance for the actual cooling process.