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    Dynamic simulation of once-through multistage flash (MSF-OT) desalination process: Effect of seawater temperature on the fouling mechanism in the heat exchangers

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    lokk_et_al_2021.pdf (842.1Kb)
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    Publication date
    2021-12
    Author
    Lokk, Reinar
    Alsadaie, S.M.
    Mujtaba, Iqbal M.
    Keyword
    Calcium carbonate
    Dynamic model
    Energy
    Fouling
    Freshwater production
    Magnesium hydroxide
    MSF
    Preheating
    Removal rate
    Variable seawater temperature
    Rights
    © 2021 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
    Peer-Reviewed
    Yes
    Open Access status
    openAccess
    
    Metadata
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    Abstract
    Scale formation of carbonates and sulphates is one of the most well-known types of crystallization fouling in heat exchangers. Tackling crystallization fouling in Once-Through Multistage Flash Desalination (MSF-OT) is one of the most challenging tasks in the desalination industry. In this paper, a fouling model is developed and then incorporated into a MSF model to investigate the fouling behaviour under variable seawater temperature. The proposed dynamic model investigates the crystallization of calcium carbonate and magnesium hydroxide at the inside tube surface areas by considering the attachment and removal mechanisms. The results show that the fouling rate is higher at high constant seawater temperature. Overall, the fouling rate is lower at the seasonal variation of the seawater temperature, resulting in a higher performance ratio (PR). The results also show that although the brine heater duty increases in winter due to low seawater temperature, the drop of fouling rate in cold months may save some energy.
    URI
    http://hdl.handle.net/10454/18872
    Version
    Accepted manuscript
    Citation
    Lokk R, Alsadaie SM and Mujtaba IM (2021) Dynamic simulation of once-through multistage flash (MSF-OT) desalination process: Effect of seawater temperature on the fouling mechanism in the heat exchangers. Computers and Chemical Engineering. 155: 107515.
    Link to publisher’s version
    https://doi.org/10.1016/j.compchemeng.2021.107515
    Type
    Article
    Collections
    Engineering and Informatics Publications

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