在本研究中，使用两组几何形状相同（平翅片、圆管）但翅片间距不同（2.2 mm（0.079 In）和5.2 mm（0.205 In））的热交换器，研究了翅片表面润湿性对除湿热交换器性能的影响。每组包含四个相同的热交换器，其表面润湿性由转化涂层控制。表面范围从完全湿润到接触角超过100°。在闭环风洞中对冷凝水的排放和滞留行为进行了研究，并提供了一系列试验条件下的稳态滞留数据。 还报告了热工水力性能数据。结果表明，无论换热器的翅片间距大小，亲水翅片都能显著改善冷凝水的排放。数据还表明，表面润湿性的影响在很大程度上取决于热交换器的紧凑性。对于翅片间距较大的换热器，换热器上的压降对翅片润湿性的变化不太敏感。由于薄膜状冷凝模式，亲水处理会导致传热退化，对于翅片间距较宽的试样，退化更大。 亲水处理最适用于高翅片密度和翅片中断的热交换器。引用:ASHRAE论文CD:2014 ASHRAE冬季会议，纽约

In this study, the impact of fin surface wettability on the performance of dehumidying heat exchangers are investigated using two groups of heat exchangers with identical geometry (plain fin, round tube) but two different fin spacing 2.2 mm (0.079 in) and 5.2 mm (0.205 in). Each group contains four identical heat exchangers with surface wettability controlled by conversion coatings. The surfaces range from completely wetting to contact angles over 100°. A study of condensate drainage and retention behavior in a closed-loop wind-tunnel is undertaken and steady state retention data are provided for a range of test conditions. Data for thermal-hydraulic performance are also reported. It is shown that hydrophilic fins significantly improve condensate drainage, whether the heat exchanger has a large or small fin spacing. The data also suggest that the impact of surface wettability is largely dependent on the compactness of the heat exchanger. For heat exchangers with large fin spacing, pressure drop across the heat exchanger is less sensitive to the change of fin wettability. Hydrophilic treatment causes heat-transfer degradation due to the filmwise mode of condensation and the degradation is larger for specimens with wide fin spacing. Hydrophilic treatment works the best for heat exchangers withhigh fin density and fin interruptions.