Abstract:

Solar energy is a clean and environmentally friendly renewable energy source, and applying solar energy to seawater desalination systems is an effective measure to solve the shortage of freshwater resources and energy crisis. In this paper, in order to investigate the effect of substrate width as well as feed concentration on evaporation performance, the experimental platform of the solar interfacial evaporation system was built, and experimental research on water transport performance of the substrate material and interfacial evaporation process of the combined evaporation structure was carried out. It is found that for the same concentration of the feed solution, when the transport water of the substrate structure is less than the interfacial evaporation demand, the evaporation rate increases with the increase of the substrate width; when the transport water meets the interfacial evaporation demand, the evaporation rate decreases with the increase of the substrate width; and the evaporation rate has a maximum value. And for the same substrate width, the evaporation rate decreases when the concentration of the feed solution increases; as the concentration of the feed solution increases, the maximum evaporation rate is shifted in the direction of increasing substrate width.

Key words: solar energy, interfacial evaporation, substrate width, liquid concentration, evaporation rate

摘要：

太阳能是一种清洁、环保的可再生能源，将太阳能应用到海水淡化系统中是解决淡水资源短缺和能源危机的有效措施。针对太阳能界面蒸发海水淡化系统，为了探究基底宽度以及料液浓度对蒸发性能的影响，本文搭建了界面蒸发实验平台，开展了组合式蒸发结构的界面蒸发过程实验研究。研究发现：对于同一种料液浓度，基底结构上水量小于界面蒸发需求时，随着基底宽度的增大，蒸发速率增大；当上水量满足界面蒸发需求后，随着基底宽度增大，蒸发速率下降，蒸发速率存在最大值点；对于同一种基底宽度，当料液浓度增大时，蒸发速率减小；随着料液浓度的增大，蒸发速率最大值向基底宽度增大的方向偏移。

关键词: 太阳能, 界面蒸发, 基底宽度, 料液浓度, 蒸发速率