Show simple item record

dc.contributor.authorSoukane, Sofiane
dc.contributor.authorGhaffour, NorEddine
dc.date.accessioned2020-09-06T13:33:55Z
dc.date.available2020-09-06T13:33:55Z
dc.date.issued2020-08-28
dc.date.submitted2020-05-16
dc.identifier.citationSoukane, S., & Ghaffour, N. (2020). Showerhead feed distribution for optimized performance of large scale membrane distillation modules. Journal of Membrane Science, 118664. doi:10.1016/j.memsci.2020.118664
dc.identifier.issn0376-7388
dc.identifier.doi10.1016/j.memsci.2020.118664
dc.identifier.urihttp://hdl.handle.net/10754/664956
dc.description.abstractThe outstanding capabilities of membrane distillation (MD) process to handle highly saline solutions are still driving research efforts to take this process to the industrial level. MD scale-up remains a challenge as the objective of increasing performance faces several design issues imposed by intrinsic physical constraints. Among the major hurdles encountered with an increase in membrane active area stands temperature polarization, a phenomenon that drastically penalizes MD efficiency. It is shown that in a typical permeate flux distribution over the membrane of an MD module, the highest local permeate flux values contribute to less than 1% of the total module production, while average values add up to half the production, suggesting a dramatic underuse of the membrane active area. Therefore, this investigation explores design opportunities to enhance module performance by reducing polarization for large-scale modules. Using state of the art CFD calculations, it is shown that combined lateral flow and progressive feeding from perforated top wall of the feed channel, and eventually the permeate channel in case of direct contact membrane distillation (DCMD) variant, can considerably increase the productivity of the module. Results further confirm the critical importance of flow distribution at the vicinity of the membrane and its effect on permeate flux. Careful analysis reveals that there is an optimum flow rate ratio between the two feed paths and that the design of the holes of the perforated plate plays a critical role to ensure flow smoothness and reduce temperature polarization. Simulations show that the productivity of a 1 m2 flat sheet module can be enhanced by more than 50% under the same operating conditions, which opens up new opportunities for MD scale up.
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). Fig. 5 (also used as Graphical Abstract) was produced by Xavier Pita, scientific illustrator at KAUST.
dc.publisherElsevier BV
dc.relation.urlhttps://linkinghub.elsevier.com/retrieve/pii/S0376738820312400
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, [, , (2020-08-28)] DOI: 10.1016/j.memsci.2020.118664 . © 2020. 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.titleShowerhead feed distribution for optimized performance of large scale membrane distillation modules
dc.typeArticle
dc.contributor.departmentKing Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Division of Biological & Environmental Science & Engineering (BESE), 23955-6900, Thuwal, Saudi Arabia.
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.identifier.journalJournal of Membrane Science
dc.rights.embargodate2022-08-28
dc.eprint.versionPost-print
dc.identifier.pages118664
kaust.personSoukane, Sofiane
kaust.personGhaffour, Noreddine
dc.date.accepted2020-08-22
refterms.dateFOA2020-09-07T06:27:24Z
kaust.acknowledged.supportUnitscientific illustrator
kaust.acknowledged.supportUnitWater Desalination and Reuse Center (WDRC)


Files in this item

Thumbnail
Name:
SS_Showerhead JMD online version.pdf
Size:
2.555Mb
Format:
PDF
Description:
Accepted manuscript
Embargo End Date:
2022-08-28

This item appears in the following Collection(s)

Show simple item record