基于自润湿溶液的纳米表面传热性能

摘要采用阳极氧化法在钛板表面制备出TiO₂纳米管阵列，并以其为加热表面。以含不同浓度丁醇的自润湿溶液为实验工质，考察了自润湿溶液浓度变化对系统临界热流密度和传热系数的影响，并从气泡行为的不同分析了两者耦合强化传热的机理。结果表明：相比于光滑表面和蒸馏水的常规组合，TiO₂纳米管表面和自润湿溶液耦合传热使得系统的临界热流密度大幅度提高，随自润湿溶液浓度的升高，传热系数依次降低。具有超亲水性和较大粗糙度的纳米管表面与1%（质量分数，下同）自润湿性溶液相耦合时，其最大传热系数和临界热流密度分别为11.963 kW·m^-2·℃^-1与623.706 kW·m^-2，比常规组合传热分别提高了84.1%和143.8%。由气泡可视化可知，耦合传热在沸腾过程中产生的气泡细小，脱离速度快，不易团聚，合并后的气泡易破碎，易形成微气泡，从而使系统进入剧烈的微气泡沸腾状态。气泡的高脱离频率和特殊有效的液体补充路径，是提高系统传热系数和临界热流密度的主要原因。

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	胡柏松
	司祥华
	王德武
	张少峰
	罗明远

关键词：纳米管表面自润湿溶液池沸腾强化传热气泡

Abstract： Titanium dioxide nanotube arrays served as the heat exchange surface were prepared by anodic oxidation on titanium surface. The influences of the butanol concentration on the critical heat flux and heat transfer coefficient of the system were investigated with the self-wetting solutions containing different concentrations of butanol, and the coupled heat transfer mechanism was also analyzed. The experimental results showed that the critical heat flux was greatly increased by the coupled heat transfer between the titanium dioxide nanotube surface and the self-wetting solution compared with the conventional smooth surface and distilled water coupling, and the heat transfer coefficient decreased with the increase of the concentration of the self-wetting solution. When the nanotube surface with super hydrophilicity and greater roughness was coupled with the 1% self-wetting solution, the maximum heat transfer coefficient and critical heat flux can be as high as 11.963 kW·m^-2·℃^-1 and 623.706 kW·m^-2, respectively, which are increased by 84.1% and 143.8% compared with the conventional coupling. It is known from the bubble visualization that the bubbles produced by coupled heat transfer during the boiling process are small, quick to depart and not easy to reunite. The combined bubbles are easy to break and form the microbubbles, which makes the system enter a violent bubble boiling state. The high departure frequency of bubbles and special effective liquid replenishing paths are the main reason for improving the heat transfer coefficient and critical heat flux.

Keywords： nanotubes surface； self-wetting solution； pool boiling； enhancement heat transfer； bubble

Received 2018-05-09;

Corresponding Authors: 张少峰,E-mail:1986037@hebut.edu.cn。 Email: 1986037@hebut.edu.cn

About author: 胡柏松(1981-),男,硕士研究生,实验师,现从事微纳尺度强化传热方面的研究。

引用本文:

胡柏松, 司祥华, 王德武, 张少峰, 罗明远.基于自润湿溶液的纳米表面传热性能[J]. 化学工业与工程, 2019,36(3): 49-54

Hu Baisong, Si Xianghua, Wang Dewu, Zhang Shaofeng, Luo Mingyuan.Nano-Surface Heat Transfer Performance Based on Self-Wetting Solution[J]. Chemcial Industry and Engineering, 2019,36(3): 49-54

[1] 张娇娇.微结构换热表面强化沸腾传热特性研究[D]. 江苏镇江:江苏科技大学,2016 Zhang Jiaojiao. Study on enhanced boiling heat transfer characteristics of microstructure heat exchanger surface[D]. Jiangsu Zhenjiang:Jiangsu University of Science and Technology, 2016(in Chinese)
[2] Das S, Saha B, Bhaumik S. Experimental study of nucleate pool boiling heat transfer of water by surface functionalization with crystalline TiO₂ nanostructure[J]. Applied Thermal Engineering, 2017, 113:1345-1357
[3] 吕树申, 刘俊威, 王晓明, 等. 二氧化钛纳米管修饰表面池沸腾传热特性[J]. 工程热物理学报, 2012, 33(6):1013-1015 Lv Shushen, Liu Junwei, Wang Xiaoming, et al. Pool boiling performance of TiO₂ nanotube surface[J]. Journal of Engineering Thermophysics, 2012, 33(6):1013-1015(in Chinese)
[4] 邓鹏, 陶金亮, 魏峰, 等. 纳米管阵列表面池沸腾强化传热实验[J]. 化工进展, 2012, 31(10):2172-2175 Deng Peng, Tao Jinliang, Wei Feng, et al. Experimental study on enhanced boiling heat transfer on nanotube arrays surface[J]. Chemical Industry and Engineering Progress, 2012, 31(10):2172-2175(in Chinese)
[5] 罗小平, 王文, 廖政标, 等. 基于不同润湿性微细通道过冷沸腾起始点(ONB)的实验研究[J]. 化工进展, 2018, 37(3):884-892 Luo Xiaoping, Wang Wen, Liao Zhengbiao, et al. Experimental study on onset of nucleate boiling(ONB)in different wettability micro-channels[J]. Chemical Industry and Engineering Progress, 2018, 37(3):884-892(in Chinese)
[6] Bonilla C F,Perry C W. Heat transmission to boiling binary liquid mixtures[J]. Trans AIChE, 2019,(37):685-705
[7] Morovati M, Bindra H, Esaki S, et al. Enhancement of pool boiling and critical heat flux in self-rewetting fluids at above atmospheric pressures[C]//ASME/JSME 20118th Thermal Engineering Joint Conference, March 13-17, 2011, Honolulu, Hawaii, USA, 2011
[8] Shoji M, Nishiguchi S. Boiling heat transfer of butanol aqueous solution[C]//Heat Transfer Division. ASME 20119th International Conference on Nanochannels, Microchannels, and Minichannels, June 19-22, 2011, Edmonton, Alberta, Canada, 2011
[9] 胡柏松, 陈兴林, 张少峰, 等. 微纳耦合表面池沸腾强化传热的实验研究[J]. 工程热物理学报, 2017, 38(12):2725-2730 Hu Baisong, Chen Xinglin, Zhang Shaofeng, et al. The experiment study of pool boiling heat transfer enhancement on micro-nano surface[J]. Journal of Engineering Thermophysics, 2017, 38(12):2725-2730(in Chinese)
[10] Wenzel R N. Resistance of solid surfaces to wetting by water[J]. Industrial & Engineering Chemistry, 1936, 28(8):988-994
[11] 胡艳鑫. 自湿润流体流动传热机理及高效振荡热管特性研究[D]. 广州:华南理工大学, 2015:21-28 Hu Yanxin. Research on flow and heat transfer mechanism of self-rewetting fluid and characteristics of efficient oscillating heat pipe[D]. Guangzhou:South China University of Technology, 2015:21-28(in Chinese)