Enhancing solar steam generation using a highly thermally conductive evaporator support  

利用高导热蒸发器支撑材料增强太阳能光热蒸发

作　　者：Yida Wang Xuan Wu Pan Wu Jingyuan Zhao Xiaofei Yang Gary Owens Haolan Xu 王艺达;武萱;吴攀;赵靖元;杨小飞;Gary Owens;徐浩兰(Future Industries Institute,University of South Australia,Mawson Lakes Campus,Adelaide,SA 5095,Australia;College of Science,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]Future Industries Institute,University of South Australia,Mawson Lakes Campus,Adelaide,SA 5095,Australia [2]College of Science,Nanjing Forestry University,Nanjing 210037,China

出　　处：《Science Bulletin》2021年第24期2479-2488,M0004,共11页科学通报（英文版）

基　　金：financial support from the Australian Research Council(ARC Future Fellowship FT190100485);financial support from the China Scholarship Council for his PhD Scholarship;the Future Industries Institute for a top up scholarship。

摘　　要：Interfacial solar steam generation is an efficient water evaporation technology which has promising applications in desalination,sterilization,water purification and treatment.A common component of evaporator design is a thermal-insulation support placed between the photothermal evaporation surface and bulk water.This configuration,common in 2-dimensional(2 D)evaporation systems,minimizes heat loss from evaporation surface to bulk water,thus localizing the heat on the evaporation surface for efficient evaporation.This design is subsequently directly adopted for 3-dimensional(3 D)evaporators without any consideration if it is appropriate.However,unlike 2 D solar evaporators,the 3 D evaporators can also harvest additional energy(other than solar light)from the air and bulk water to enhance evaporation rate.In this scenario,the use of thermal insulator support is not proper since it will hinder energy extraction from water.Here,the traditional 3 D evaporator configuration was completely redesigned by using a highly thermally conductive material,instead of a thermal insulator,to connect evaporation surfaces and the bulk water.Much higher evaporation rates were achieved by this strategy,owing to the rapid heat transfer from the bulk water to the evaporation surfaces.Indoor and outdoor tests both confirmed that evaporation performance could be significantly improved by substituting a thermal insulator with thermally conductive support.These findings will redirect the future design of 3 D photothermal evaporators.界面光热蒸发是一种高效的水蒸发技术,在太阳能海水淡化和水处理方面具有广阔的应用前景.光热蒸发器设计的一个重要部分是放置于光热蒸发表面和水体之间的隔热基底/支撑材料.这种典型的设计在二维(2D)蒸发体统中最大限度地减少了从蒸发表面到水体的热传递能量损失,从而将热量集中于蒸发表面以实现高效的光热蒸发.这种设计概念随后被直接应用于三维(3D)蒸发体系中.然而,与2D蒸发器只从太阳光获取能量不同的是,3D蒸发器还可以从空气和水中获取额外能量用于促进蒸发.在这种情况下,传统的隔热基底材料的使用是不合适的,因为它会阻碍蒸发器从水体中抽取能量.因此,本文重新对3D蒸发器进行了设计,使用了高导热材料来代替隔热材料来连接蒸发表面和水体.室内和户外测试均证实,通过使用高导热基底材料可以极大地提高蒸发性能.这一发现为设计3D光热蒸发器提供了新的思路.

关 键 词：Solar steam generation Photothermal materials Heat conduction Reduced graphene oxide Water evaporation 3D evaporator 

分 类 号：TK515[动力工程及工程热物理—热能工程]