Improving Solar Vapor Generation by Eliminating the Boundary Layer Inhibition Effect of Evaporator Pores
Improving Solar Vapor Generation by Eliminating the Boundary Layer Inhibition Effect of Evaporator Pores
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DOI：
10.1021/acsenergylett.3c00183
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发表时间：
2023-04
影响因子：
22
通讯作者：
Zhiyang Zhang;Wenlong Xu;Jian Wang;Mi Hu;Dongming Zhang;Lujie Jia;Azhen Kang;Yonglan Xi;Xiaomei Ye;Shuang Cheng;Enhui Sun;Yu Chen;Zhijun Wang;Hongzhen Lin;Qingbo Xiao
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文献类型：
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作者：
Zhiyang Zhang;Wenlong Xu;Jian Wang;Mi Hu;Dongming Zhang;Lujie Jia;Azhen Kang;Yonglan Xi;Xiaomei Ye;Shuang Cheng;Enhui Sun;Yu Chen;Zhijun Wang;Hongzhen Lin;Qingbo Xiao
太阳能驱动的水蒸发在各种应用中都有很高的要求。然而，太阳能蒸发器的孔隙结构通常是随机设计的，这严重阻碍了蒸汽扩散，从而限制了产水量。在此，边界层抑制效应首次被发现，我们提出边界层厚度减小的低曲折通道足以突破长期存在的蒸气扩散限制。作为一个演示，自然启发低曲折通道构造的太阳能蒸发器。由于消除了边界层抑制，蒸发器中的蒸汽扩散通量很容易逸出，在4.0 m s-1的对流条件下，蒸发速率为16.8 kg m-2 h-1。此外，通道的3D径向互连能够在任意方向的对流下实现稳定的水蒸发。我们的工作为消除太阳能蒸发器的边界层抑制效应提供了一种很有前途的解决方案。
Solar-driven water evaporation is highly demanded in various applications. However, the pore structures of the solar evaporators are commonly randomly designed, which seriously hinder vapor diffusion and thus limit water producibility. Herein, the boundary layer inhibition effect is uncovered for the first time, and we propose that low-tortuosity channels with a reduced boundary layer thickness is adequate for breaking through the long-existing vapor diffusion limitation. As a demo, nature-inspired low-tortuosity channels are constructed for a solar evaporator. Due to elimination of the boundary layer inhibition, the vapor diffusion flux can easily escape from the evaporator, yielding an evaporation rate of 16.8 kg m–2h–1under a convective flow of 4.0 m s–1and 1 sun irradiation. Moreover, the 3D radial interconnection of the channels enables stable water evaporation under an arbitrary direction of convective flow. Our work provides a promising solution to eliminate the boundary layer inhibition effect of a solar evaporator.