Effects of the flow pattern of intertubular liquid film on mass and heat transfer synergies in a falling-film dehumidification system with horizontal pipes are studied. A flow model of the dehumidifying solution between horizontal pipes is established using Fluent software, the rule of transitions of the flow pattern between pipes is studied, critical Reynolds numbers of flow pattern transitions are obtained, and the accuracy of the model is verified by experiments. The mass transfer synergy angle and heat transfer synergy angle are respectively used as evaluation criteria for the mass transfer synergy and heat transfer synergy, and distribution laws of the synergy angles for droplet, droplet columnar and curtain flow patterns are obtained. Simulation results show that the mass transfer synergy angles corresponding to droplet, droplet columnar and curtain flow patterns all rise to a plateau with time. The mean mass-transfer synergy angle is 98° for the droplet flow pattern, higher than 96.5° for the droplet columnar flow pattern and 95° for the curtain flow pattern. The results show that the mass transfer synergy of the droplet flow pattern is better than that of the droplet columnar flow pattern and that of the curtain flow pattern.

研究了水平管降膜除湿系统中管间液膜的流动方式对传质和传热协同作用的影响。利用Fluent软件建立了水平管道间除湿液的流动模型，研究了管道间流型的转变规律，得到了流型转变的临界雷诺数，并通过实验验证了模型的准确性。将传质协同角和传热协同角分别作为传质协同和传热协同的评价标准，得出液滴，液滴柱状和幕流型式的协同角分布规律。仿真结果表明，传质协同角对应于液滴，随着时间的流逝，液滴的柱状和幕状流型都上升到平稳状态。液滴流动方式的平均传质协同角为98°，液滴柱状流动方式的平均传质协同角大于96.5°，帘式流动方式的平均传质协同角大于95°。结果表明，液滴流态的传质协同作用优于液滴柱状流态和帘式流态传质协同作用。