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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >A comparison of the airside performance of the fin-and-tube heat exchangers in wet condition, with and without hydrophilic coating
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A comparison of the airside performance of the fin-and-tube heat exchangers in wet condition, with and without hydrophilic coating

机译：带有和不带有亲水涂层的湿式翅片管热交换器的空气侧性能比较

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摘要

An experimental study was performed on compact fin-and-tube heat exchangers in wet conditions. Airside performance for both hydrophilic coated and un-coated surface is examined. It is found that the effect of inlet relative humidity on the heat transfer performance is small. For un-coated surfaces, the effect of inlet relative humidity has a pronounced effect on pressure drops. It is likely that this phenomenon is related to the condensate flow pattern along the fin surface. The heat transfer performance for the hydrophilic coating surface is lower than the corresponding un-coated surface tested at the same wet condition. Further, the degradation of heat transfer performance may be up to 20% for fin pitches of 1.2 mm. The pressure drops for the hydrophilic coated surface are also lower than the corresponding un-coated surfaces. A maximum 40% reduction is observed for plain fin geometry. The effect of inlet condition on frictional performance is more pronounced in the enhanced slit geometry.
机译：在湿润条件下，在紧凑型翅片管式热交换器上进行了实验研究。检查了亲水涂层和未涂层​​表面的空气侧性能。发现入口相对湿度对传热性能的影响很小。对于未涂层的表面，入口相对湿度的影响对压降有显着影响。这种现象很可能与沿着翅片表面的冷凝水流型有关。在相同的潮湿条件下，亲水涂层表面的传热性能低于测试的相应未涂层表面。此外，对于1.2mm的翅片节距，传热性能的下降可能高达20％。亲水涂层表面的压降也低于相应的未涂层表面。对于平翅片几何形状，观察到最大减少40％。入口条件对摩擦性能的影响在狭缝几何形状的增强中更为明显。

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