Thermal Efficiency of Solar Steam Generation Approaching 100% through Capillary Water Transport
Thermal Efficiency of Solar Steam Generation Approaching 100% through Capillary Water Transport
复制标题
热力%20效率%20的%20太阳能%20蒸汽%20发电%20接近%20100%%20通过%20毛细管%20水%20运输
DOI：
10.1002/anie.201911457
复制
发表时间：
2019-11-07
影响因子：
16.6
通讯作者：
Qu, Liangti
中科院分区：
文献类型：
--
作者：
Liang, Hanxue;Liao, Qihua;Qu, Liangti
太阳能驱动的界面水蒸发产率受到太阳热能效率低的严重限制。在此，注入控制技术（ICT）在rGO泡沫中实现毛细水状态，并有效地调节其中的水运动模式。在3D石墨烯泡沫中形成适量的毛细水可以通过确保微米尺寸的孔通道不会被水完全阻塞并且通过暴露尽可能多的蒸发区域同时防止太阳能用于加热过量的水来大大增加蒸气逸出通道。在1 kWm ~（-2）太阳光照下，太阳能蒸汽发生率可达2.40kgm ~（-2）h ~（-1），是文献报道的最高值之一。此外，太阳能热效率接近100%。该研究提高了太阳能蒸发水的性能，促进了碳基材料太阳能蒸发系统的应用。
Solar-driven interfacial water evaporation yield is severely limited by the low efficiency of solar thermal energy. Herein, the injection control technique (ICT) achieves a capillary water state in rGO foam and effectively adjusts the water motion mode therein. Forming an appropriate amount of capillary water in the 3D graphene foam can greatly increase the vapor escape channel, by ensuring that the micrometer-sized pore channels do not become completely blocked by water and by exposing as much evaporation area as possible while preventing solar heat from being used to heat excess water. The rate of solar steam generation can reach up to 2.40kgm(-2)h(-1) under solar illumination of 1kWm(-2), among the best values reported. In addition, solar thermal efficiency approaching 100% is achieved. This work enhances solar water-evaporation performance and promotes the application of solar-driven evaporation systems made of carbon-based materials.