轴向导热对印刷电路板式换热器换热性能影响  

Effect of Axial Heat Conduction on Thermal Performance in a Printed Circuit Heat Exchanger

作　　者：唐凌虹[1] 杨博皓 李文军 TANG Ling-Hong;YANG Bo-Hao;LI Wen-Jun(School of Mechanical Engineering,Xi’an Shiyou University,Xi’an 710065,China)

机构地区：[1]西安石油大学机械工程学院,西安710065

出　　处：《工程热物理学报》2022年第4期1055-1062,共8页Journal of Engineering Thermophysics

基　　金：陕西省自然科学基础研究计划项目(No.2020JM-539);陕西省自然科学基础研究计划项目(No.2021JQ-578)。

摘　　要：对不同工作条件对锯齿型通道印刷电路板式换热器(PCHE)轴向导热的影响进行了数值研究,结果表明,在雷诺数较小时轴向导热对PCHE的换热性能影响较大,但是随着雷诺数增大,其影响逐渐减小,在高雷诺数时其影响可以忽略;随着工作压力增大,PCHE换热性能减弱,并且工作压力较大时,轴向导热对PCHE换热性能的影响较小;冷通道入口温度为195 K时PCHE换热性能最好,入口温度为220 K时换热性能最差,但是冷通道不同的进口温度对PCHE内轴向导热的影响相差很小。In this study, the effect of axial heat conduction on thermal performance in a zigzag channel printed circuit heat exchanger(PCHE) with supercritical liquefied natural gas as the working fluid was studied by a numerical method under different conditions. The influence factors included Reynolds number, operating pressure, and inlet temperatures of the cold side. The results indicated that the axial heat conduction could greatly affect the thermal performance of the PCHE at low Reynolds numbers but decrease it at high Reynolds numbers for different working conditions, and the effect of axial heat conduction could be ignored at high Reynolds numbers. At the same average Reynolds number, the thermal performance of the PCHE decreased as the pressure increased, and the inlet temperature of 195 K provided the best thermal performance while the inlet temperature of 220 K was the worst among the three different inlet temperatures of the cold side. However, the influence of different inlet temperatures on the axial heat conduction in the PCHE was very small.

关 键 词：印刷电路板式换热器 轴向导热 换热性能 

分 类 号：TK124[动力工程及工程热物理—工程热物理]