A liquid desiccant air dehumidifier (LDAD) with both high efficiency and low desiccant carryover is of vital significance to indoor environment. However, the instability introduced by desiccant film flow tends to deteriorate the droplets entrainment in product air and remains to be solved. In this study, a novel disk-type liquid desiccant air dehumidifier with no film flow (DLDAD) was developed to radically eliminate the apparent desiccant film flow. The distribution and refreshing of liquid desiccant on wetted surface is realized by the rotation of the disks rather than the film flow of liquid desiccant. The performance of DLDAD was numerically evaluated under varied dehumidifier parameters, including stage number, immersion depth, rotation speed and air and solution parameters. The results show that an increase in the stage number can increase dehumidification performance, ensuring the air outlet humidity ratio below 10 g/kg. The dimensionless immersion depth of 0.4 and the rotation speed of 3 r/min are suggested for better dehumidification performance in this case. Increasing solution concentration or decreasing solution temperature can effectively reduce the air outlet humidity ratio. All these results can support the structural design and practical application for LDADs with higher efficiency and lower desiccant carryover in the future.

中文翻译：

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一种新型无膜流盘式液体除湿空气除湿机的建模与性能评价

一种兼具高效率和低干燥剂携带量的液体干燥剂空气除湿机（LDAD）对室内环境至关重要。然而，干燥剂薄膜流动带来的不稳定性往往会使产品空气中的液滴夹带变差，因此仍有待解决。在这项研究中，开发了一种新型的无膜流（DLDAD）盘式液体干燥剂空气除湿机，以从根本上消除表观干燥剂膜流。液体干燥剂在湿润表面的分布和更新是通过圆盘的旋转而不是液体干燥剂的薄膜流动来实现的。DLDAD 的性能在不同的除湿机参数下进行了数值评估，包括级数、浸入深度、转速以及空气和溶液参数。结果表明，增加级数可以提高除湿性能，保证出风口湿度低于10 g/kg。在这种情况下，建议无量纲浸入深度为 0.4，转速为 3 r/min，以获得更好的除湿性能。提高溶液浓度或降低溶液温度可有效降低出风口湿度比。所有这些结果都可以支持未来具有更高效率和更低干燥剂残留的 LDAD 的结构设计和实际应用。提高溶液浓度或降低溶液温度可有效降低出风口湿度比。所有这些结果都可以支持未来具有更高效率和更低干燥剂残留的 LDAD 的结构设计和实际应用。提高溶液浓度或降低溶液温度可有效降低出风口湿度比。所有这些结果都可以支持未来具有更高效率和更低干燥剂残留的 LDAD 的结构设计和实际应用。