Microchannel cooling technique for dissipating high heat flux on W/Cu flat-type mock-up for EAST divertor

作     者：Mingxiang LU Le HAN Qi ZHAO Juncheng QIU Jianhong ZHOU Dinghua HU Nanyu MOU Xuemei CHEN 鲁铭翔;韩乐;赵起;邱俊城;周剑宏;胡定华;牟南瑜;陈雪梅

作者机构：MIIT Key Laboratory of Thermal Control of Electronic EquipmentSchool of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094People’s Republic of China Institute of Plasma PhysicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People’s Republic of China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2022年第24卷第9期

页      面：134-144页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

基　　金：financial support from the National MCF Energy R&D Program(No.2018YFE0312300) National Natural Science Foundation of China(No.51706100) the Natural Science Foundation of Jiangsu Province(No.BK20180477) Fundamental Research Funds for the Central Universities(No.30918011205) 

主　　题：microchannel divertor flat-type high heat flux test EAST 

摘      要：As an important component of tokamaks,the divertor is mainly responsible for extracting heat and helium ash,and the targets of the divertor need to withstand high heat flux of 10 MW m-2 for steady-state *** this study,we proposed a new strategy,using microchannel cooling technology to remove high heat load on the targets of the *** results demonstrated that the microchannel-based W/Cu flat-type mock-up successfully withstood the thermal fatigue test of 1000 cycles at 10 MW m^(-2)with cooling water of 26 l min^(-1),30°C(inlet),0.8 MPa(inlet),15 s power on and 15 s dwell time;the maximum temperature on the heat-loaded surface(W surface)of the mock-up was 493°C,which is much lower than the recrystallization temperature of W(1200°C).Moreover,no occurrence of macrocrack and‘hot spot’at the W surface,as well as no detachment of W/Cu tiles were observed during the thermal fatigue *** results indicate that microchannel cooling technology is an efflcient method for removing the heat load of the divertor at a low flow *** present study offers a promising solution to replace the monoblock design for the EAST divertor.