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    Development of a model for spray evaporation based on droplet analysis

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    Type
    Article
    Authors
    Chen, Q.
    Thu, K.
    Bui, T.D.
    Li, Y.
    Ng, Kim Choon cc
    Chua, K.J. cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2016-08-20
    Online Publication Date
    2016-08-20
    Print Publication Date
    2016-12
    Permanent link to this record
    http://hdl.handle.net/10754/621795
    
    Metadata
    Show full item record
    Abstract
    Extreme flash evaporation occurs when superheated liquid is sprayed into a low pressure zone. This method has high potential to improve the performance of thermally-driven desalination plants. To enable a more in-depth understanding on flash evaporation of a superheated feed water spray, a theoretical model has been developed with key considerations given to droplet motion and droplet size distribution. The model has been validated against 14 experimental data sets from literature sources to within 12% discrepancy. This model is capable of accurately predicting the water productivity and thermal efficiency of existing spray evaporator under specific operating conditions. Employing this model, the effect of several design parameters on system performance was investigated. Key results revealed that smaller droplet enabled faster evaporation process while higher initial droplet velocity promoted water productivity. Thermal utilization marginally changes with the degree of superheat, which renders a quick design calculation of the brine temperature without the need for iterations. © 2016 Elsevier B.V.
    Citation
    Chen Q, Thu K, Bui TD, Li Y, Ng KC, et al. (2016) Development of a model for spray evaporation based on droplet analysis. Desalination 399: 69–77. Available: http://dx.doi.org/10.1016/j.desal.2016.08.017.
    Sponsors
    China Scholarship Council
    National Research Foundation Singapore[R-265-000-466-281]
    Publisher
    Elsevier BV
    Journal
    Desalination
    DOI
    10.1016/j.desal.2016.08.017
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.desal.2016.08.017
    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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