This work investigates the dehumidification performance of vacuum membrane-based dehumidification with difference wavy membranes. Firstly, this paper constructs four different models of wavy membrane support layers, and proposes their explicit functions. In addition, the accuracy of different turbulence models under wavy boundary condition are compared. Using the verified turbulence model, this paper studies the dehumidification performance of four wavy membrane-based dehumidification modules. Finally, according to the details of flow field, the mechanism behind these dehumidification phenomena are discussed. Results indicate that low-Reynolds number k–ε turbulence model has a higher accuracy than other models in wavy boundary. Wavy membrane does not always increase the dehumidification efficiency, even if it can always increase dehumidification area. When waviness is in the range of 0∼0.06, the dehumidification effect of four wavy membranes are weaker than that of flat membrane, and the flow resistance of four wavy membranes are higher than that of flat membrane. Vertical velocity induced by wavy membrane is the key factor to enhancing dehumidification performance, and a steeper wavy membrane shape at the tail of backflow is beneficial to dehumidification. This work demonstrates the basic dehumidification mechanism of wavy membrane and can provide suggestions for diversified development of vacuum membrane-based dehumidification module.

这项工作研究了具有不同波纹膜的基于真空膜的除湿的除湿性能。首先，本文构建了四种不同的波浪膜支撑层模型，并提出了它们的显式功能。另外，比较了波浪边界条件下不同湍流模型的精度。使用验证的湍流模型，本文研究了四个基于波浪膜的除湿模块的除湿性能。最后，根据流场的细节，探讨了这些除湿现象的产生机理。结果表明，在波浪边界处，低雷诺数k–ε湍流模型具有比其他模型更高的精度。波浪状的膜并不总是会增加除湿效率，即使它总是可以增加除湿面积。当波纹度在0〜0.06的范围内时，四个波纹膜的除湿效果比平膜弱，四个波纹膜的流动阻力高于平膜。波浪膜引起的垂直速度是提高除湿性能的关键因素，而在回流尾部较陡的波浪膜形状有利于除湿。这项工作说明了波浪膜的基本除湿机理，可以为基于真空膜的除湿模块的多元化发展提供建议。四个波状膜的流动阻力均高于平膜。波浪膜引起的垂直速度是提高除湿性能的关键因素，而在回流尾部较陡的波浪膜形状有利于除湿。这项工作说明了波浪膜的基本除湿机理，可以为基于真空膜的除湿模块的多元化发展提供建议。四个波状膜的流动阻力均高于平膜。波浪膜引起的垂直速度是提高除湿性能的关键因素，而在回流尾部较陡的波浪膜形状有利于除湿。这项工作说明了波浪膜的基本除湿机理，可以为基于真空膜的除湿模块的多元化发展提供建议。