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(MIIT Key Laboratory of Thermal Control of Electronic Equipment,School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,People’s Republic of China;Institute of Plasma Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China)

机构地区：[1]MIIT Key Laboratory of Thermal Control of Electronic Equipment,School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,People’s Republic of China [2]Institute of Plasma Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China

出　　处：《Plasma Science and Technology》2022年第9期134-144,共11页等离子体科学和技术（英文版）

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)。

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 operation.In this study,we proposed a new strategy,using microchannel cooling technology to remove high heat load on the targets of the divertor.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 testing.These results indicate that microchannel cooling technology is an efflcient method for removing the heat load of the divertor at a low flow rate.The present study offers a promising solution to replace the monoblock design for the EAST divertor.

关 键 词：MICROCHANNEL DIVERTOR flat-type high heat flux test EAST 

分 类 号：TL631.24[核科学技术—核技术及应用]