干旱区生态环境知识资源中心(Arid): Fundamental Limits of the Dew-Harvesting Technology

Arid

DOI	10.1080/15567265.2020.1722300
	Fundamental Limits of the Dew-Harvesting Technology
	Dong, Minghao 1; Zhang, Zheng 1; Shi, Yu 2; Zhao, Xiaodong 1; Fan, Shanhui 2; Chen, Zhen 1
通讯作者	Chen, Zhen
来源期刊	NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING
ISSN	1556-7265
EISSN	1556-7273
出版年	2020
卷号	24 期号:1 页码:43-52
英文摘要	Dew-harvesting technology radiatively cools a condenser below the dewpoint to achieve condensation of the water vapor from the atmosphere. Due to its passive nature, this technology has attracted broad interest, in particular in the context of the worldwide drinking-water scarcity. However, the fundamental limit of its performance has not yet been clarified. Moreover, the existing applications have been limited to humid areas. Here, we point out the upper bound of the performance of this technology by carefully considering various parameters such as the ambient temperature (T-ambient), the relative humidity (RH), and the convection coefficient (h). Moreover, we highlight the potential of a condenser consisting of a selective emitter, which is capable of condensing water vapor under significantly more arid conditions as compared with the use of a blackbody emitter. For example, a near-ideal emitter could achieve a dew-harvesting mass flux () of 13 gm(-2)hr(-1) even at T-ambient = 20 degrees C with RH = 40%, under which condition the blackbody emitter cannot harvest any dew. We provide a numerical design of such a selective emitter, consisting of six layers, optimized for dew-harvesting purposes.
英文关键词	Dew-harvesting radiative cooling photonic design selective emitter drinking water
类型	Article
语种	英语
国家	Peoples R China ; USA
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000513375000001
WOS关键词	WATER ; CONDENSATION ; ISLAND
WOS类目	Thermodynamics ; Engineering, Mechanical ; Nanoscience & Nanotechnology ; Materials Science, Characterization & Testing ; Physics, Applied
WOS研究方向	Thermodynamics ; Engineering ; Science & Technology - Other Topics ; Materials Science ; Physics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315203
作者单位	1.Southeast Univ, Sch Mech Engn, Jiangsu Key Lab Design & Manufacture Micro Nano B, Nanjing 210096, Peoples R China; 2.Stanford Univ, Dept Elect Engn, Ginzton Lab, Stanford, CA 94305 USA
推荐引用方式 GB/T 7714	Dong, Minghao,Zhang, Zheng,Shi, Yu,et al. Fundamental Limits of the Dew-Harvesting Technology[J],2020,24(1):43-52.
APA	Dong, Minghao,Zhang, Zheng,Shi, Yu,Zhao, Xiaodong,Fan, Shanhui,&Chen, Zhen.(2020).Fundamental Limits of the Dew-Harvesting Technology.NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING,24(1),43-52.
MLA	Dong, Minghao,et al."Fundamental Limits of the Dew-Harvesting Technology".NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING 24.1(2020):43-52.