Abstract Filling the air gap with solid materials is an effective way to enhance the permeate flux of the membrane distillation. This work applies various materials as the fillers and analyzes the transport performance of the material gap membrane distillation desalination processes. The results demonstrate that the properties and structures of the fillers are important factors for the transport behavior during the membrane distillation processes. The void volume fraction of the gap is dominated by the size of the fillers and their packing structure. The membrane distillation performance is related to the thermal conductivity of the fillers and the void volume fraction of the gap. Fillers with high thermal conductivity can enhance the permeate flux. The wettability of the fillers has an insignificant effect on the permeate flux. The theoretical thermal conductivity of the material gap is proposed. The transport behavior in the material gap membrane distillation process is dominated by the thermal resistance in the gap.

中文翻译：

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材料间隙膜蒸馏脱盐过程的输运分析

摘要 用固体物质填充气隙是提高膜蒸馏渗透通量的有效途径。这项工作以各种材料为填料，分析了材料间隙膜蒸馏海水淡化过程的传输性能。结果表明，填料的性质和结构是影响膜蒸馏过程中传输行为的重要因素。间隙的空隙体积分数由填料的尺寸及其填充结构决定。膜蒸馏性能与填料的导热系数和间隙的空隙体积分数有关。具有高导热性的填料可以提高渗透通量。填料的润湿性对渗透通量的影响微不足道。提出了材料间隙的理论热导率。材料间隙膜蒸馏过程中的传输行为由间隙中的热阻决定。