Experimental study of the effects of fin surface characteristics on defrosting behavior

Experimental study of the effects of fin surface characteristics on defrosting behavior
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翅片表面特性对除霜行为影响的实验研究

DOI:
10.1016/j.applthermaleng.2014.09.082
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发表时间:
2015-01
影响因子:
6.4
通讯作者:
Youfa Zhang
Youfa Zhang
中科院分区:
工程技术2区
文献类型:
--
作者:
Caihua Liang;Feng Wang;Yan Lü;Chunxiao Wu;Xiaosong Zhang;Youfa Zhang

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空气源热泵的传热行为包括熔化、排水和蒸发,不同表面特性的翅片表现出不同的传热特性。本文研究了表面特性对减摇鳍减摇性能的影响。构建了一套结霜/除霜实验系统,实现了对不同表面特性翅片除霜过程的可视化研究。分析和比较了霜的融化和融水的保持特性。表面特性对熔化时间和熔化过程有显著影响。不同翅片的保水性能存在明显差异。截留水在亲水翅片上形成了一层薄水膜,而超疏水翅片上由于霜层的释放,只有少量小尺寸的球形液滴停留在翅片上,超疏水翅片上的截留水质量最小,减少了蒸发所需的能量.重复的实验显示出与第一次运行几乎相同的振荡行为。
The defrosting behavior of an air source heat pump includes melting, drainage and evaporation, which shows different characteristics on fins with different surface characteristics. This paper presents an investigation of the effects of surface characteristics on the defrosting behavior of a fin. A frosting/defrosting experimental system was constructed to implement visual research of the defrosting process on fins with different surface characteristics. The characteristics of frost melting and molten water retention were analyzed and compared. The effects of the surface characteristics on the melting time and melting process were significant. There were obvious differences in molten water retention among different fins. Retained water formed a thin water film on the hydrophilic fin, while only a few spherical droplets with small sizes stayed on the super hydrophobic fin because the frost layer was released from it. The retained water mass on the super hydrophobic fin was the least, which reduced the energy for evaporation. Repeated experiments showed almost the same defrosting behavior as those of the first run.
DOI: --
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