HTS熔盐高温试验回路电磁感应加热的球床内热源数值分析与验证  

Numerical analysis and verification of internal heat source in a pebble bed heated by electromagnetic induction in HTS molten salt high temperature test loop

作　　者：王善武 周翀 王纳秀[1,2] 邹杨 蔡创雄[1] 朱海华 WANG Shanwu;ZHOU Chong;WANG Naxiu;ZOU Yang;CAI Chuangxiong;ZHU Haihua(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院大学,北京100049

出　　处：《核技术》2022年第5期97-106,共10页Nuclear Techniques

基　　金：中国科学院战略先导专项(No.XDA0201002);中国科学院青年创新促进会(No.2018301)资助。

摘　　要：HTS(Heat Transfer Salt)熔盐高温试验回路中球床传热实验装置旨在研究熔盐与燃料球的传热特性,其 中的石墨球床区域采用中频感应加热提供内部热源,模拟燃料球在堆芯内的释热。为了得到更好的加热效果, 采用有限元方法对实验装置的电磁感应加热进行了数值模拟,通过分析实验装置不同石墨球数量和线圈参数 情况下涡流功率的分布,得到不同设计参数对电磁感应加热性能的影响规律,并与实验结果进行了对比。模拟 结果表明,线圈边缘附近的石墨球涡流功率明显偏小,加热器感应线圈导线截面积为 40 mm2、绕制匝数为 31 匝 时加热效果可以满足实验需求,当前实验金属密封结构与线圈的距离较近容易产生涡流功率,造成功率损失。 与实验数据对比分析表明,在考虑实验中装置漏热的情况下,数值模拟能够较好地预测实验工况内的结果,并 对当前实验装置的优化提出了意见。研究结果为使用电磁感应加热相关的实验研究提供了设计参考。[Background]The pebble bed heat transfer experimental facilities in the high temperature test loop of HTS(Heat Transfer Salt)molten salt is designed to study the heat transfer characteristics of molten salt and fuel pebble.The intermediate frequency induction heating is adopted to provide the internal heat source in the graphite pebble bed,which simulates the heat released by the fuel pebbles in the core of the MSRs.[Purpose]This study aims to get better heating effect by analyzing the internal heat source of electromagnetic induction heating.[Methods]The finite element method was used to numerically simulate the electromagnetic induction heating of the experimental device.By analyzing the distribution of eddy current power in the experimental device under different number of graphite pebbles and coil parameters,the influence law of different design parameters on the electromagnetic induction heating performance was obtained and compared with the experimental results. [Results] The simulation results show that the eddy current power of the graphite pebble near the edge of the coil is obviously small. When the cross-sectional area of the induction coil of the heater is 40 mm2 and the number of winding turns is 31, the heating effect can meet the experimental requirements. In the current experiment, the close distance between the metal seal structure and the coil is easy to produce eddy current power, resulting in power loss. [Conclusions] The comparison with the experimental data shows that the numerical simulation can predict the experimental results well when considering the heat leakage of the experimental device, and provide some suggestions on the optimization of the current experimental device as well as design reference for the experimental study using electromagnetic induction heating.

关 键 词：感应加热 有限元 球床 内热源 对流传热实验 

分 类 号：TL3[核科学技术—核技术及应用] TG155.21[金属学及工艺—热处理]