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首页> 外文期刊>Building and Environment >Experimental study on dehumidification performance enhancement by TiO2 superhydrophilic coating for liquid desiccant plate dehumidifiers
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Experimental study on dehumidification performance enhancement by TiO2 superhydrophilic coating for liquid desiccant plate dehumidifiers

机译：TiO2超亲水涂层提高液体干燥剂板式除湿机除湿性能的实验研究

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Liquid desiccant air dehumidification is a promising dehumidification technology with lower energy consumption, less pollution and more flexible humidity control. However, the incomplete wetting conditions of liquid desiccant deteriorates the dehumidification performance and limits the development. Therefore, how to enhance the surface wettability is critical to improving the dehumidification performance as well as reducing the building energy consumption. In this paper, a novel TiO2 super hydrophilic coating was applied in a plate dehumidifier to enhance the surface wettability and improve the dehumidification performance. Firstly, the characterization of the coating was conducted. The test results showed the surface wettability was effectively improved with the contact angle dramatically decreasing from 84.6 to 8.8. Then two single-channel internally-cooled liquid desiccant dehumidifiers were fabricated to investigate the effect of TiO2 coating on dehumidification performance. The experimental results indicated that the dehumidification performance was significantly enhanced with the mean enhancing ratios of 1.60 and 1.63 for moisture removal rate and dehumidification efficiency, respectively. Besides, the influencing factors on dehumidification performance were analysed comprehensively. Based on the analysis, the new empirical correlations of mass transfer coefficients were developed with different contact angles. Lastly, the energy consumption of liquid desiccant air-conditioning system with coated dehumidifiers for a commercial building in Hong Kong was simulated and around 80 MW.h of the electricity consumption could be saved. This study is helpful to researchers and engineers who are interested in enhancing the dehumidification performance and reducing the building energy consumption. (C) 2017 Elsevier Ltd. All rights reserved.
机译：液体干燥剂空气除湿是一种有前途的除湿技术，具有较低的能耗，较少的污染和更灵活的湿度控制。然而，液体干燥剂的不完全润湿条件使除湿性能恶化并限制了其发展。因此，如何提高表面润湿性对于提高除湿性能以及降低建筑能耗至关重要。本文将新型的TiO2超亲水涂层应用于平板除湿机中，以提高其表面润湿性并改善除湿性能。首先，进行涂层的表征。测试结果表明，表面润湿性得到了有效改善，接触角从84.6急剧降低到8.8。然后，制造了两个单通道内部冷却的液体干燥剂除湿机，以研究TiO2涂层对除湿性能的影响。实验结果表明，除湿率和除湿效率的平均增强比分别为1.60和1.63，显着提高了除湿性能。此外，对除湿性能的影响因素进行了综合分析。在此基础上，研究了不同接触角下传质系数的经验关系。最后，对香港某商业建筑的带涂层除湿机的液体干燥空调系统的能耗进行了模拟，可节省约80 MW.h的电力。这项研究对有兴趣提高除湿性能和减少建筑能耗的研究人员和工程师很有帮助。 （C）2017 Elsevier Ltd.保留所有权利。

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