Synthetic trees for enhanced solar evaporation and water harvesting
Synthetic trees for enhanced solar evaporation and water harvesting
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DOI：
10.1063/5.0049904
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发表时间：
2021-06
影响因子：
4
通讯作者：
Ndidi L. Eyegheleme;Weiwei Shi;Lance H. De Koninck;J. O'Brien;J. Boreyko
中科院分区：
文献类型：
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作者：
Ndidi L. Eyegheleme;Weiwei Shi;Lance H. De Koninck;J. O'Brien;J. Boreyko
利用多孔蒸发器产生太阳能蒸汽是一种很有前途的获取淡水的方法。通过使用延伸到自由表面以上的3D蒸发器，可以减少寄生热损失；然而，毛细管上升将这种结构的高度限制在厘米尺度。在这里，我们展示了一棵合成树的太阳能蒸汽发电，它利用蒸腾作用而不是毛细管上升将水泵到任何所需高度的绝缘管中。人造叶子是用涂有石墨的纳米多孔陶瓷盘制成的，它被固定在垂直排列的塑料管的上端。使用太阳能蒸馏器，观察到合成树收获的凝结水大约是同等体积水库的三倍。
Solar steam generation from a porous evaporator is a promising approach for harvesting fresh water. Parasitic heat loss can be reduced by using a 3D evaporator that extends above the free surface; however, capillary rise constrains the height of such structures to a centimeter scale. Here, we demonstrate solar steam generation from a synthetic tree, which uses transpiration instead of capillary rise to pump water up insulating tubes of any desired height. A nanoporous ceramic disk coated with graphite was used for the synthetic leaf, which was attached to the upper end of a vertical array of plastic tubes. Using a solar still, it was observed that the synthetic tree harvested approximately three times more condensed water than an equivalent bulk reservoir.