太阳能蒸发过程的热管理,Langmuir

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太阳能蒸发过程的热管理
Langmuir ( IF 3.7 ) Pub Date : 2023-06-09 , DOI: 10.1021/acs.langmuir.3c01041
Shuang Li ₁ , Zhiyuan Xi ₁ , Li Yu ₁ , Hongjie Yan ₁ , Meijie Chen ₁

Affiliation

太阳能驱动的界面蒸发因其绿色环保的特性而在水净化领域受到广泛关注。关键问题是如何有效利用太阳辐射进行蒸发。为了充分理解太阳能蒸发过程的热管理，通过有限元方法建立了多物理场模型来阐明传热过程，以改善太阳能蒸发。模拟结果表明，可以通过调整热损失、局部加热、对流传质和蒸发面积来改善蒸发性能。应避免蒸发界面的热辐射损失和对底部水的热对流损失，局部加热有利于蒸发。界面上方的对流可以提高蒸发性能，尽管它会增加热对流损失。此外，还可以通过将蒸发面积从2D结构增加到3D结构来改善蒸发。实验结果证实，太阳能蒸发率可提高0.795 kg·m^–2 h ^–1至 1.122 kg m ^–2 h ^–1在 1 个太阳下，具有 3D 界面以及界面与底层水之间的隔热。这些结果可以为基于热管理的太阳能蒸发系统提供设计原理。

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Thermal Management of the Solar Evaporation Process

Solar-driven interfacial evaporation has caught wide attention for water purification due to its green and environment-friendly properties. The key issue is how to effectively utilize solar radiation for evaporation. To fully understand the thermal management of the solar evaporation process, a multiphysics model has been built by the finite element method to clarify the heat transfer process for the improvement of solar evaporation. Simulation results indicate that the evaporation performance can be improved by tuning the thermal loss, local heating, convective mass transfer, and evaporation area. The thermal radiation loss of the evaporation interface and thermal convection loss to the bottom water should be avoided, and local heating is good for evaporation. Convection above the interface can improve evaporation performance, although it would enhance the thermal convective loss. In addition, evaporation also can be improved by increasing the evaporation area from 2D to 3D structures. Experimental results confirm that the solar evaporation ratio can be improved from 0.795 kg m^–2 h^–1 to 1.122 kg m^–2 h^–1 at 1 sun with a 3D interface and thermal insulation between the interface and bottom water. These results can provide a design principle for the solar evaporation system based on thermal management.

更新日期：2023-06-09

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