Frosting mechanism and suppression on nano/micro-structured hydrophobic surfaces

被引：0

作者：

Ding, Yunfei ^{[1
,2
]}

Yin, Shuai ^{[1
]}

Liao, Yundan ^{[1
]}

Wu, Huijun ^{[1
,2
]}

机构：

[1] School of Civil Engineering, Guangzhou University, Guangzhou 510006, Guangdong

[2] Guangdong Key Laboratory of Building Energy Efficiency and Application Techniques, Guangzhou University, Guangzhou 510006, Guangdong

来源：

Huagong Xuebao/CIESC Journal | 2012年 / 63卷 / 10期

关键词：

Electrospinning; Fractal dimension; Frost formation; Hydrophobic surface; Nano/micro-structured;

D O I：

10.3969/j.issn.0438-1157.2012.10.030

中图分类号：

学科分类号：

摘要：

Seven kinds of hydrophobic surfaces, which have the typical characteristics of micron particle structure, mixed structure of micron particle and nano-fiber, and nano-fiber structure with the surfaces of nano/micro-structure being controllable, were prepared via adjusting the concentration of spinning solution in the method of electro-spinning. The microstructure of the surfaces was characterized and the hydrophobicity of the hydrophobic surfaces mentioned above was tested. The characteristics of frosting suppression on the nano/micro-structured hydrophobic surface were studied by means of experimental comparison of the process of frosting and the performance of frosting suppression, combined with the analysis of surface fractal dimension. The results showed that although all of the nano/micro-structured hydrophobic surfaces studied were hydrophobic with their static contact angle between 139° and 152°, their hydrophobicity did not closely correlate with its frosting suppression capacity. The capacity for frosting suppression of the hydrophobic surfaces was largely dependent upon the surface characteristics and decreased with increasing fractal dimension of surface structure.

引用

页码：3213 / 3219

页数：6

共 14 条

[1]

Barrow H., A note on frosting of heat pump evaporator surfaces, Journal of Heat Recovery Systems, 5, 3, pp. 195-201, (1985)

[2]

Laforte J.L., Allaire M.A., Laflamme J., State-of-the-art on power line de-icing, Atmospheric Research, 46, pp. 143-158, (1998)

[3]

Bragg M.B., Heinrich D.C., Valarezo W.O., Effect of under-wing frost on a transport aircraft airfoil at flight Reynolds number, Journal of Aircraft, 31, 6, pp. 1372-1378, (1994)

[4]

Emery A.F., Siegel B.L., Experimental measurements of the effects of frost formation on heat exchanger performance//Proceedings of AIAA/ASME Thermophysics and Heat Transfer Conference, Seattle Washington, 139, pp. 1-7, (1990)

[5]

Piening W., Dera ẅrmeübergang an rohren bei freier stromung unter beruchsich tigung derbildung vonschwitzwasser und reif, Gesundheits-Ingenieur, 56, 21, pp. 493-501, (1933)

[6]

Yao Y., Jiang Y.Q., Deng S.M., A study on the performance of the airside heat exchanger under frosting in an air source heat pump water heater/chiller unit, International Journal of Heat and Mass Transfer, 47, 17-18, pp. 3745-3756, (2004)

[7]

Cai L., Wang R., Hou P., Zhang X., Study on restraining frost growth at initial stage by hydrophobic coating and hygroscopic coating, Energy and Buildings, 43, pp. 1159-1163, (2011)

[8]

Li D., Chen Z., Effect of ultrasound on rest raining frost formation on flat surface, CIESC Journal, 60, 9, pp. 2171-2176, (2009)

[9]

Matsumoto K., Daikoku Y., Fundamental study on adhesion of ice to solid surface: Discussion on coupling of nano-scale field with macroscale field, International Journal of Refrigeration, 32, 3, pp. 444-453, (2009)

[10]

Wu X.M., Webb R.L., Investigation of the possibility of frost release from a cold surface, Experimental Thermal and Fluid Science, 24, 3, pp. 151-156, (2001)

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