Performance simulation of paper folding-like evaporator for solar evaporation systems

被引：0
|
作者：
Ye Z. [1 ]
Shan H. [1 ]
Xu Z. [1 ]
机构：
[1] Institute of Refrigeration and Cryogenic Engineering, Shanghai Jiao Tong University, Shanghai
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷
关键词：
evaporation; numerical simulation; solar energy; three-dimensional structure;
D O I：
10.11949/0438-1157.20221538
中图分类号：
学科分类号：
摘要：
Solar vapor generation, as a carbon-free and sustainable freshwater production approach, exhibits considerable potential for alleviating the global freshwater crisis. However, the conventional evaporators that adopt the one-dimensional structure have faced a theoretical upper limit evaporation rate of 1.47 kg·m-2·h-1for solar evaporation due to the solar energy conversion efficiency. Differently, the three-dimensional evaporator can surpass the evaporation limit by exploiting environmental heat and enhancing solar capture, realizing a higher evaporation rate and energy efficiency. Herein, we explore the performance and advantages of the three-dimensional (3D) paper folding-like evaporator in comparison with one-dimensional flat evaporator enabled by the multiphysics simulation method via COMSOL software. Meanwhile, we study the influences of ambient air speed, relative humidity, and solar incident angle on the overall evaporation performance. The results show that the evaporation rate of the paper folding-like 3D evaporator is averagely increased by 1.20 times in comparison with the flat evaporator, reaching 1.53 kg·m-2·h-1, meanwhile the dynamic solar energy capture performance is improved by 32.07%. The ambient with high wind speeds and low relative humidity can increase the overall evaporation rate, finally reaching the calculated evaporation rate of 3.07 kg·m-2·h-1 at the relative humidity of 20% and the airflow rate of 1.0 m·s-1. We anticipate that our designed structure and simulation results could provide design ideas for the subsequent three-dimensional evaporator and its practical applications. © 2023 Chemical Industry Press. All rights reserved.
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页码：132 / 140
页数：8
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