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dc.contributor.authorJin, Yong
dc.contributor.authorZhang, Lianbin
dc.contributor.authorWang, Peng
dc.date.accessioned2017-07-03T11:45:31Z
dc.date.available2017-07-03T11:45:31Z
dc.date.issued2017-06-23
dc.identifier.citationJin Y, Zhang L, Wang P (2017) Atmospheric Water Harvesting: Role of Surface Wettability and Edge Effect. Global Challenges: 1700019. Available: http://dx.doi.org/10.1002/gch2.201700019.
dc.identifier.issn2056-6646
dc.identifier.doi10.1002/gch2.201700019
dc.identifier.urihttp://hdl.handle.net/10754/625144
dc.description.abstractAtmospheric water is emerging as an important potable water source. The present work experimentally and theoretically investigates water condensation and collection on flat surfaces with contrasting contact angles and contact angle hysteresis (CAH) to elucidate their roles on water mass collection efficiency. The experimental results indicate that a hydrophilic surface promotes nucleation and individual droplets growth, and a surface with a low CAH tends to let a smaller droplet to slide down, but the overall water mass collection efficiency is independent of both surface contact angle and CAH. The experimental results agree well with our theoretical calculations. During water condensation, a balance has to be struck between single droplet growth and droplet density on a surface so as to maintain a constant water droplet surface coverage ratio, which renders the role of both surface wettability and hysteresis insignificant to the ultimate water mass collection. Moreover, water droplets on the edges of a surface grow much faster than those on the non-edge areas and thus dominate the contribution to the water mass collection by the entire surface, directly pointing out the very important role of edge effect on water condensation and collection.
dc.description.sponsorshipThe authors are grateful to KAUST for very generous financial support.
dc.publisherWiley
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/gch2.201700019/full
dc.rightsThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleAtmospheric Water Harvesting: Role of Surface Wettability and Edge Effect
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalGlobal Challenges
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionKey Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education; School of Chemistry and Chemical Engineering; Huazhong University of Science and Technology; Wuhan 430074 China
kaust.personJin, Yong
kaust.personWang, Peng
refterms.dateFOA2018-06-13T12:34:41Z


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This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.