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dc.contributor.authorAlsaadi, Ahmad Salem
dc.contributor.authorAlpatova, Alla
dc.contributor.authorLee, Jung Gil
dc.contributor.authorFrancis, Lijo
dc.contributor.authorGhaffour, NorEddine
dc.date.accessioned2018-05-30T07:22:56Z
dc.date.available2018-05-30T07:22:56Z
dc.date.issued2018-05-28
dc.identifier.citationAlsaadi AS, Alpatova A, Lee J-G, Francis L, Ghaffour N (2018) Flashed-feed VMD configuration as a novel method for eliminating temperature polarization effect and enhancing water vapor flux. Journal of Membrane Science. Available: http://dx.doi.org/10.1016/j.memsci.2018.05.060.
dc.identifier.issn0376-7388
dc.identifier.doi10.1016/j.memsci.2018.05.060
dc.identifier.urihttp://hdl.handle.net/10754/627989
dc.description.abstractThe coupling of heat and mass transfer in membrane distillation (MD) process makes enhancing water vapor flux and determining MD membrane mass transfer coefficient (MTC) fairly challenging due to the development of temperature gradient near the membrane surface, referred to as temperature polarization (TP). As a result, the change in feed temperature at the membrane surface will be difficult to measure accurately. In this paper, the effect of TP was decoupled from the membrane MTC by preventing the liquid feed stream from contacting the membrane surface through the use of a novel custom-made vacuum MD (VMD) module design. Results showed that a temperature difference of 10°C between the feed bulk and feed temperatures at the membrane surface/interface is estimated to take place in the typical VMD configuration, while the proposed flashed-feed VMD configuration eliminates TP effect and gives a flux 3.5-fold higher (200kg/m2.hr) under similar operating conditions. Therefore, it can be concluded that heat transfer coefficient is considered to be the main factor controlling resistance of water vapor flux in the typical VMD configuration. The measured MTC of the tested commercial membrane was found to be more accurate and the highest among all reported MTCs in the MD literature (2.44×10−6kg/m2.s.Pa). Additionally, a transmembrane temperature difference of 5°C and 10°C in the novel configuration can produce water vapor fluxes of about 9kg/m2.hr and 40kg/m2.hr, respectively, at a feed temperature of 70°C, which is very attractive for scaling-up the process.
dc.description.sponsorshipThe research reported in this paper was supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia. The authors acknowledge help, assistance and support from the Water Desalination and Reuse Center (WDRC) staff.
dc.publisherElsevier BV
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0376738817329514
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Membrane Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Membrane Science, [(2018)] DOI: 10.1016/j.memsci.2018.05.060. © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectVacuum membrane distillation (VMD)
dc.subjectFlashed-feed VMD configuration
dc.subjectDesalination
dc.subjectMass transfer coefficient (MTC)
dc.subjectTemperature polarization (TP)
dc.titleFlashed-feed VMD configuration as a novel method for eliminating temperature polarization effect and enhancing water vapor flux
dc.typeArticle
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.identifier.journalJournal of Membrane Science
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Chemical Engineering, University of Jeddah, Jeddah, Saudi Arabia
kaust.personAlsaadi, Ahmad Salem
kaust.personAlpatova, Alla
kaust.personLee, Jung Gil
kaust.personFrancis, Lijo
kaust.personGhaffour, NorEddine
refterms.dateFOA2018-06-13T23:56:53Z


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NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Membrane Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Membrane Science, [(2018)] DOI: 10.1016/j.memsci.2018.05.060. © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Except where otherwise noted, this item's license is described as NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Membrane Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Membrane Science, [(2018)] DOI: 10.1016/j.memsci.2018.05.060. © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/