Structural Optimization of the Inlet Header of Supercritical Carbon Dioxide Printed Circuit Board Heat Exchanger  

作　　者：WANG Yanquan LU Yuanwei WANG Yuanyuan HAN Xinlong WU Yuting GAO Qi 

机构地区：[1]MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation,Beijing Key Laboratory of Heat Transfer and Energy Conversion,Beijing University of Technology,Beijing,100124,China

出　　处：《Journal of Thermal Science》2024年第4期1458-1467,共10页热科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52076006);National Key Research and Development Program of China(No.2022YFB4202402)。

摘　　要：Supercritical carbon dioxide printed circuit board heat exchangers are expected to be applied in third-generation solar thermal power generation.However,the uniformity of supercritical carbon dioxide entering the heat exchanger has a significant impact on the overall performance of the heat exchanger.In order to improve the uniformity of flow distribution in the inlet header,this article studies and optimizes the inlet header of a printed circuit board heat exchanger through numerical simulation.The results indicate that when supercritical carbon dioxide flows through the header cavity,eddy currents will be generated,which will increase the uneven distribution of flow rate,while reducing the generation of eddy currents will improve the uniform distribution of flow rate.When the dimensionless factor of the inlet header is 6,the hyperbolic configuration is the optimal structure.We also reduced the eddy current region by adding transition segments,and the results showed that the structure was the best when the dilation angle was 10°,which reduced the non-uniformity by 21%compared to the hyperbolic configuration,providing guidance for engineering practice.

关 键 词：third-generation solar thermal power generation inlet header PCHE numerical simulation 

分 类 号：TK172[动力工程及工程热物理—热能工程] TM615[电气工程—电力系统及自动化]