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    Influence of high range of mass transfer coefficient and convection heat transfer on direct contact membrane distillation performance

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    MTC manuscript - R1 unmarked.pdf
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    1.324Mb
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    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Lee, Jung Gil
    Jeong, Sanghyun
    Alsaadi, Ahmad Salem cc
    Ghaffour, NorEddine cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2017-11-03
    Online Publication Date
    2017-11-03
    Print Publication Date
    2018-01
    Permanent link to this record
    http://hdl.handle.net/10754/626138
    
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    Abstract
    In order to improve water production of membrane distillation (MD), the development of high performance membrane having better mass transfer and enhancement of convection heat transfer in MD module have been continuously investigated. This paper presents the relationship between the heat and mass transfer resistance across the membrane and the performance improvement. Various ranges of mass transfer coefficient (MTC) from normal (0.3×10−6 to 2.1×10−6kg/m2sPa: currently available membranes) to high (>2.1×10−6kg/m2sPa: membranes under development) were simulated using an experimentally validated model at different ranges of convection heat transfer by varying the inlet flow rates and spacer enhancement factor. The effect of mass transfer and convection heat transfer on the MD performance parameters including temperature polarization coefficient (TPC), mean permeate flux, and specific energy consumption were investigated in a direct contact MD (DCMD) configuration. Results showed that improving the MTC at the low ranges is more important than that at the high ranges where the heat transfer resistance becomes dominant and hence the convection heat transfer coefficient must be increased. Therefore, an effort on designing MD modules using feed and permeate spacers and controlling the membrane surface roughness to increase the convection heat transfer and TPC in the channel aiming to enhance the flux is required because the currently developed mass transfer has almost reached the critical point.
    Citation
    Lee J-G, Jeong S, Alsaadi AS, Ghaffour N (2018) Influence of high range of mass transfer coefficient and convection heat transfer on direct contact membrane distillation performance. Desalination 426: 127–134. Available: http://dx.doi.org/10.1016/j.desal.2017.10.034.
    Sponsors
    The research reported in this paper was supported by funding from King Abdullah University of Science and Technology (KAUST), Saudi Arabia.
    Publisher
    Elsevier BV
    Journal
    Desalination
    DOI
    10.1016/j.desal.2017.10.034
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S0011916417319471
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.desal.2017.10.034
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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