膜组件是膜式液体除湿技术的核心部件，完善高效低阻的大型组件设计理论是该技术走向工业应用前的一项关键课题。本项目提出一种新型模块化构建的中空纤维膜组件。其中模块的数量由大组件的容量决定，而每个模块内装填了随机分布的中空纤维膜管束。模块易于机械化装填，从而大幅度降低了制造成本。模块可实现人工规则排列，以利于流动和热质传递性能的优化。本项目拟采用实验、理论分析和数值模拟的方法，针对模块化组件内“随机分布管束-规则分布模块-整体组件”的多层次结构中的流动与传热传质过程展开基础研究。分别建立模块和整体组件内动量、能量和质量传递模型，研究膜的传热传质特性对组件性能的影响，研究模块排列方式对组件内流动不均匀性及传热传质性能的影响，研究纤维管弯曲度、交叉度等特性对管束流动与传热传质的影响。分析不同模块布局方式下组件内流场/温度场/湿度场的协同规律，提出高效低阻膜组件设计准则，阐明组件的性能放大规律。

The hollow fiber membrane contactor is a key component in membrane-based liquid desiccant air dehumidification technology. Before its industrial application, one of the crucial project need to conduct is to develop the design theory for large contactors with high efficiency and low flow resistance. In this project, a modular membrane contactor is proposed, in which the number of modules scales with the volume of the contactor. In a module, hollow fibers are randomly potted and thus it is easy to achieve automated manufacturing and the production cost can be substantially reduced. Owing to the artificially and uniformly arranged modules, it facilitates the optimization of flow, heat and mass transfer performance of the contactor. The experiment, theoretical analysis and numerical method are used to study the heat and mass transfer mechanism in the contactor, which is consisted of bundles with randomly distributed fibers and regularly arranged modules. Firstly, the momentum, heat and mass transfer models of the module and the contactor are established, respectively. Secondly, the effects of membrane features and module layout on the flow, heat and mass transfer performance of the contactor are studied. The effects of bending, crossing and etc. of fibers on the flow, heat and mass transfer in a module are also disclosed. Afterwards, by analyzing synergy principles between velocity and temperature/velocity and humidity in contactors with various geometrical parameters, the optimization criteria for contactors with high efficiency and low flow resistance are raised. At last, scale-up principles of the contactor are clarified.