Abstract: The coupled heat and moisture transfer in a counter flow hollow fiber membrane tube bank used for liquid desiccant regeneration are investigated. Two fibers, the solution stream inside the fibers, and the air stream surrounding the fibers are selected as the calculating domain. The partial differential equations governing the fluid flow and heat mass transports are established and solved by a controlled volume method and a body-fitted transform technology. The friction factor, Nusselt and Sherwood numbers in the unit cells during the desiccant regeneration process are obtained and analyzed. These fundamental data for the uniform temperature and heat flux boundary conditions are compared. The features of the heat and moisture transports for the solution regeneration are disclosed.

Key words: hollow fiber membrane tube bank, liquid desiccant air dehumidification, solution regeneration, counter flow, coupled heat and moisture transfer

摘要： 研究了中空纤维膜管束液体除湿再生过程中的热湿耦合传递特性。选择了两根膜纤维管及其管内部溶液流和管间空气流作为研究对象，建立了控制流体流动与传热传质过程的偏微分方程，并采用有限容积离散方法和贴体坐标转换方法进行求解，获得了计算单元内的阻力系数、Nusselt数和Sherwood数，分析了耦合边界条件下的Nusselt数和Sherwood数与相应等壁温和等热流密度边界条件下的相应准则数之间的差异。这些研究结果可以为用于液体除湿再生过程的中空纤维膜管束构成的膜接触器的结构设计提供理论基础。

关键词: 中空纤维膜管束, 液体除湿, 溶液再生, 逆流, 热湿耦合