Study on Channel Structure Optimization of Printed Circuit Heat Exchanger
-
摘要: 印刷电路板式换热器(PCHE)采用扩散焊进行焊接,焊接压力沿换热板片的传递易出现中断,导致流道中部出现未焊合区。为提高焊合质量,本研究进行了流道结构优化,结果表明:增大矩形流道倒角有利于提高焊合质量,将冷热流道进行错位(使下层流道肋板处于上层流道中间),也可以改变板间轴向应力分布,提高焊合质量。Abstract: The printed circuit heat exchanger (PCHE) is welded by diffusion welding, but the existence of the heat exchange flow channel causes the interruption of the transmission of welding pressure along the heat exchange plate, resulting in the non-welding in the middle of the flow channel. In order to improve the welding quality, the optimization of the runner structure is carried out. The research results show that increasing the chamfer of the rectangular runner is beneficial to improve the welding quality. Dislocation of the hot and cold runners (to place the lower runner aid plate in the middle of the upper runner) can also change the axial stress distribution between the plates to improve the welding quality.
-
-
[1] LEE S M, KIM K Y. Comparative study on performance of a zigzag printed circuit heat exchanger with various channel shapes and configurations[J]. Heat and Mass Transfer, 2013, 49(7):1021-1028.
[2] CHEN M H, SUN X D, CHRISTENSEN R N, et al. Pressure drop and heat transfer characteristics of a high-temperature printed circuit heat exchanger[J]. Applied Thermal Engineering, 2016, 108:1409-1417.
[3] PAUL B K, KWON P, SUBRAMANIAN R. Understanding limits on fin aspect ratios in counterflow microchannel arrays produced by diffusion bonding[J]. Journal of Manufacturing Science and Engineering, 2006, 128(4):977-983.
[4] 王志鑫, 党开放, 张亚军, 等. 微换热通道的几何特性对多孔微型换热器传热特性的影响[J]. 化工机械, 2012, 39(4):482-486. [5] 唐凌虹, 杨博皓, 李文军. 轴向导热对印刷电路板式换热器换热性能影响[J]. 工程热物理学报, 2022, 43(4):1055-1062. [6] 张海燕, 郭江峰, 淮秀兰, 等. PCHE内轴向导热对局部换热性能的影响研究[J]. 化工学报, 2019, 70(12):4590-4598. [7] 刘海建, 杨旭东, 孔振, 等. TC4钛合金舵面扩散焊有限元模拟及工艺研究[J]. 航天制造技术, 2018(1):12-16. [8] 赵杰, 李峰, 吕涛, 等. 基于ANSYS的FeCrAl合金真空扩散焊模拟[J]. 新技术新工艺, 2012(1):61-65.
计量
- 文章访问数: 131
- HTML全文浏览量: 31
- PDF下载量: 28
下载:
