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    Sustainable desalination using ocean thermocline energy

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    Type
    Article
    Authors
    Ng, Kim Choon cc
    Shahzad, Muhammad Wakil
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2017-09-22
    Online Publication Date
    2017-09-22
    Print Publication Date
    2018-02
    Permanent link to this record
    http://hdl.handle.net/10754/625778
    
    Metadata
    Show full item record
    Abstract
    The conventional desalination processes are not only energy intensive but also environment un-friendly. They are operating far from thermodynamic limit, 10–12%, making them un-sustainable for future water supplies. An innovative desalination processes are required to meet future sustainable desalination goal and COP21 goal. In this paper, we proposed a multi-effect desalination system operated with ocean thermocline energy, thermal energy harnessed from seawater temperature gradient. It can exploit low temperature differential between surface hot water temperature and deep-sea cold-water temperature to produce fresh water. Detailed theoretical model was developed and simulation was conducted in FORTRAN using international mathematical and statistical library (IMSL). We presented four different cases with deep-sea cold water temperature varies from 5 to 13°C and MED stages varies from 3 to 6. It shows that the proposed cycle can achieve highest level of universal performance ratio, UPR = 158, achieving about 18.8% of the ideal limit. With the major energy input emanated from the renewable solar, the proposed cycle is truly a “green desalination” method of low global warming potential (GWP), best suited for tropical coastal shores having bathymetry depths up to 300m or more.
    Citation
    Ng KC, Shahzad MW (2018) Sustainable desalination using ocean thermocline energy. Renewable and Sustainable Energy Reviews 82: 240–246. Available: http://dx.doi.org/10.1016/j.rser.2017.08.087.
    Sponsors
    The authors would like to thank the King Abdullah University of Science & Technology (KAUST) for the generous grant awarded to Project no. 7000000411.
    Publisher
    Elsevier BV
    Journal
    Renewable and Sustainable Energy Reviews
    DOI
    10.1016/j.rser.2017.08.087
    Additional Links
    http://www.sciencedirect.com/science/article/pii/S1364032117312339
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.rser.2017.08.087
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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