化工学报2024，Vol.75Issue(z1)：108-117,10.DOI:10.11949/0438-1157.20240887
翼型印刷电路板式换热器流动传热特性数值研究
Numerical study on flow and heat transfer characteristics of airfoil printed circuit heat exchangers
任冠宇 1张义飞 1李新泽 1杜文静1
作者信息
- 1. 山东大学能源与动力工程学院,山东济南 250061
- 折叠
摘要
Abstract
Printed circuit heat exchanger(PCHE),as a new type of efficient and compact micro-channel heat exchanger,has been widely used in supercritical carbon dioxide(SCO2)Brayton cycle.The thermal and hydraulic performance of SCO2 in airfoil PCHE channel was analyzed by numerical simulation.With the improvement of fin size,the surface heat transfer coefficient and comprehensive performance are improved,and with the increase of variation degree,the surface heat transfer coefficient and comprehensive performance are further improved.When the Angle of attack is changed to change the fin orientation,the surface heat transfer coefficient and comprehensive performance are higher than that when the angle of attack is 0°,and the surface heat transfer coefficient and comprehensive performance are further improved with the increase of change degree.Slotting in the center of the fin to change the shape of the fin,slotted fin arrangement can reduce the friction factor,improve the flow performance,but the comprehensive performance is reduced.The orthogonal test with the three structural parameters of fin size,orientation and shape shows that the dimensionless slot width of fin has the greatest influence on the flow heat transfer performance.In the sample range,the structure with fin expansion ratio of 1.4,angle of attack of 20° and no slot has the best comprehensive performance.The analysis of flow and heat transfer performance of PCHE with different airfoil structures can provide reference for SCO2 cooling theory research and PCHE typical engineering application.关键词
超临界二氧化碳/印刷电路板式换热器/数值模拟/流动/传热Key words
supercritical carbon dioxide/printed circuit heat exchanger/numerical simulation/flow/heat transfer分类
能源科技引用本文复制引用
任冠宇,张义飞,李新泽,杜文静..翼型印刷电路板式换热器流动传热特性数值研究[J].化工学报,2024,75(z1):108-117,10.
