The air-side heat transfer performance of herringbone wavy fin-tube heat exchangers can be improved by optimizing fin geometries and introducing perforations to the wavy fin. Based on a typical herringbone wavy fin-tube heat exchanger used in the outdoor unit of an air conditioner with collar outside diameter of 7.3 mm, transverse tube pitch of 22 mm, and longitudinal tube pitch of 19.05 mm, the effects of fin pitch, wave length, slits height, and geometries of slits are simulated using CFD and the outcomes are discussed in the paper. We demonstrate that constant pumping power is the ideal criterion for the performance evaluation of any new designs. The wave length has no remarkable effects on the heat transfer coefficient while the lowest pressure drop appears with the symmetric wave configuration. The heat transfer coefficient can be improved by 23.4% when the waffle height, fin pitch, and wave length are simultaneously optimized. Furthermore, punching slits on top of the windward part of wavy fins leads to a 5.5% increase in the heat transfer coefficient. In the end, 34.2% improvement of the heat transfer coefficient is yielded when combining the slit perforations to the optimum fin pitch, wave length, and waffle height.

人字形波纹翅片管换热器的空气侧传热性能可以通过优化翅片几何形状和在波纹翅片上引入穿孔来提高。以环外径7.3mm、横管节距22mm、纵管节距19.05mm的空调室外机典型人字形波纹翅片管换热器为例，研究了翅片节距、波纹使用 CFD 模拟了狭缝的长度、狭缝高度和几何形状，并在论文中讨论了结果。我们证明恒定的泵送功率是评估任何新设计性能的理想标准。波长对传热系数没有显着影响，而对称波构型出现的压降最低。同时优化华夫格高度、翅片间距和波长，传热系数可提高23.4%。此外，波浪形翅片迎风部分顶部的冲孔导致传热系数增加5.5%。最后，当将狭缝穿孔与最佳翅片间距、波长和华夫格高度结合时，传热系数提高了 34.2%。