Study on Restraining Frost Growth at Initial Stage by Hydrophobic Coating and Hygroscopic Coating
For finding an effective method of restraining frost growth, the growingprocesses of frost on the surfaces of normal copper, hydrophobic coating (car wax coating)and hygroscopic coating (glycerol coating) were studied experimentally. The processes wererecorded by photography. The quantitative analysis to the experimental images by digital image processing method was conducted. The results indicate that theres evident effect ofhydrophobie coating and hygroscopic coating on frost growth at initial stage. Compared tonormal copper surface, frost on the hydrophobic coating surface and on the hygroscopiccoating surface appears later with lower frost height, sparse distribution and less aggradationsof ice crystals. Theres no evident effect of hygroscopic coating thickness on frost height.However, theres evident effect of hygroscopic coating thickness on frost height. The thickerthe coating is, the effect on frost growth is bigger. Therefore, frost growth can be restrained by both hydrophobic coating and hygroscopic coating at the initial stage of its formation, and application of hydrophobic coating and hygroscopic coating to heat exchanger in refrigeration and air conditioning equipments would be promising.
Frost growth Hydrophobic coating Hydrophilic coating Ice crystal
Liang Cai Ronghan Wang Puxiu Hou Xiaosong Zhang
School of Energy and Environment,Southeast University,Nanjing,China School of Automotive Engineering,South China University of Technology,Guangzhou,China
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
2180-2187
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）