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    Solar-heated submerged vacuum membrane distillation system with agitation techniques for desalination

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    Name:
    VMD_VMD evacuated tube Online version Seppur 2020.pdf
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    2.864Mb
    Format:
    PDF
    Description:
    Accepted Article
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    Type
    Article
    Authors
    Bamasag, Ahmad
    Alqahtani, Talal
    Sinha, Shahnawaz
    Ghaffour, NorEddine cc
    Phelan, Patrick
    KAUST Department
    Environmental Science and Engineering Program
    Biological and Environmental Sciences and Engineering (BESE) Division
    Date
    2020-10-07
    Online Publication Date
    2020-10-07
    Print Publication Date
    2021-02
    Embargo End Date
    2022-10-07
    Submitted Date
    2020-04-24
    Permanent link to this record
    http://hdl.handle.net/10754/665514
    
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    Abstract
    Submerged membrane distillation (S-MD) has been proposed as an alternative to conventional cross-flow MD systems to desalinate hypersaline water. In conventional S-MD systems, the hydrophobic membrane is submerged in the feed water tank that is directly heated by an electric heating element, eliminating the need for feed pumping. In this study, a solar-heated submerged vacuum membrane distillation (S-VMD) system that uses an evacuated tube collector as the feed container is proposed. Indoor tests under steady-state operating conditions and daily outdoor tests under ambient weather conditions were conducted to investigate the system’s functionality. The effect of two agitation techniques (aeration and internal circulation) to reduce temperature and concentration polarizations were studied. The daily performance tests revealed that the solarheated S-VMD system can achieve a permeate flux of 5.9 to 11.1 kg·m-2·h-1 depending on solar intensity. The permeate flux was enhanced by 9% under aeration and by 22% under circulation in the outdoor tests. The water production per solar absorbing area can be as high as 0.96 kg·m-2·h1. The system maintained a stable permeate flux and excellent water quality over a long-term operation. The small-scale system can provide fresh water in remote areas with limited natural resources.
    Citation
    Bamasag, A., Alqahtani, T., Sinha, S., Ghaffour, N., & Phelan, P. (2020). Solar-heated submerged vacuum membrane distillation system with agitation techniques for desalination. Separation and Purification Technology, 117855. doi:10.1016/j.seppur.2020.117855
    Sponsors
    A. Bamasag would like to thank King Abdulaziz University (KAU) for supporting his study at Arizona State University (ASU), USA.
    Publisher
    Elsevier BV
    Journal
    Separation and Purification Technology
    DOI
    10.1016/j.seppur.2020.117855
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S1383586620323285
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.seppur.2020.117855
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program

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