结霜与微尺度表面特性的实验研究

Experimental study on frost formation and the meso-scale surface feature

针对翅片式蒸发器表面的结霜问题,提出了一种新的实验研究方法,即利用CSPM2000(扫描探针显微 镜)对两类材料冷表面进行扫描记录,同时利用专门的CCD摄像与显微镜系统,观测两类材料表面的整个结霜 过程,从而探讨微观表面结构与材料表面霜层形成的关系.实验结果表明,材料的表面粗糙度对结霜有很大影 响,表面光洁度好,霜沉降量较小.

In the paper, a new experimental scheme, which uses CCD, microscope system and CSPM2000 , was presented for the purpose of that relationship between the meso-scale surface structure and frost formation on fin-tube e-vaporators can be deduced. Connected with the experiment, it is shown that the roughness of the aluminum surface was better than the copper and the frost formed on the aluminum surface was much more than the copper one.