哈尔滨工程大学学报2024，Vol.45Issue(4)：819-824,6.DOI:10.11990/jheu.202207039
超临界CO2印刷电路板换热器热工水力特性研究
Thermal-hydraulic characteristics of a printed circuit board heat exchanger using supercritical carbon dioxide
摘要
Abstract
For the printed circuit heat exchanger(PCHE)in supercritical CO2 Brayton cycle,its complex structure and special physical properties of the working medium will lead to large calculation errors in the lumped parameter method.To improve calculation accuracy,the PCHE thermal-hydraulic calculation program is developed on the ba-sis of the Modelica language.The parameters of PCHE during steady-state operation are analyzed using the subnode method.The results show that the convective heat transfer coefficient of sCO2 in the PCHE channel substantially changes along the flow direction.Compared with the design value,the maximum relative error of the subnode cal-culation program is less than 3%.The calculation accuracy is also greatly improved compared with that of the lumped parameter method.Therefore,the subnode calculation method should be adopted to improve the calculation accuracy.The results can provide a reference for the design and simulation of PCHE in sCO2 Brayton cycle sys-tems.关键词
超临界二氧化碳/超临界流体/布雷顿循环/印刷电路板/逆流式/换热器/分节点法/换热特性Key words
supercritical carbon dioxide/supercritical flow/Brayton cycle/printed circuit/counterflow/heat ex-changer/sub-node calculation method/heat exchange characteristics分类
能源科技引用本文复制引用
明杨,金旸,杨雯,赵富龙,谭思超,田瑞峰..超临界CO2印刷电路板换热器热工水力特性研究[J].哈尔滨工程大学学报,2024,45(4):819-824,6.基金项目
中国科协项目(2021QNRC001). （2021QNRC001）
