卤水
海水淡化
太阳能淡化
蒸发器
蒸发
对流
材料科学
环境科学
太阳能蒸馏器
Péclet编号
工艺工程
机械
化学工程
热力学
工程类
化学
热交换器
物理
膜
生物化学
作者
Chenyang Dang,Xingtian Zhang,Lin Huang,Guiyin Xu,Li Gu,Xuebo Cao,Meifang Zhu
出处
期刊:Desalination
[Elsevier]
日期:2023-01-18
卷期号:550: 116408-116408
被引量:21
标识
DOI:10.1016/j.desal.2023.116408
摘要
Desalination based on interfacial solar evaporation is emerging as one of the most promising water treatment technologies. However, the inevitable salt-accumulation at the evaporation interface is still a major challenge facing the long-term application. Herein, a salt-resistant evaporator (SRE) is proposed under the guidance of computational fluid dynamics simulation. Theoretical simulation clearly suggests that well-aligned multiscale channels represent the optimal geometry of the photothermal evaporator, as they contribute high hydraulic conductivity and diffusion flux and derivate strong convection. During solar evaporation, these channels provide the pathways for the rapid transfer of bulk brine, which excretes the salt and self-regenerates the evaporator in real time. Rattan naturally features regular multiscale channels. Consequently, this sustainable biomass material is employed to carbonize and assemble the desired SRE. This rattan-based evaporator exhibits a high evaporation rate (1.47 kg m−2 h−1) and efficiency (91 %) in a highly concentrated brine (20 wt% NaCl) under 1 sun. Owing to the convection effect tuning, its performance is kept constant during a continuous week operation, indicative of the long-term stability of the system. Moreover, convective effect tuning can be generalized to other photothermal materials, which opens up the possibilities for large-scale application of solar desalination of high salinity brine.
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