Vertical tube foam evaporation (VTFE), a novel method of substantially enhancing evaporative heat transfer performance, provides significant advantages in fuel and capital costs of large desalination plants. VTFE has been developed through the pilot plant stage for both upflow and downflow modes of operation; test data obtained on a simultaneous, comparative basis indicate that the upflow VTFE mode is to be preferred to the downflow mode. This method relies upon the addition of a selected surfactant in a few parts per million to the seawater feed, and on foamy two-phase flow over the heat transfer surfaces; the upflow tubeside pressure drop is thereby reduced substantially to improve the process stability, and the heat transfer performance is approximately doubled.


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    Title :

    New developments in vertical tube evaporation of seawater


    Contributors:
    Sephton, H. (author)


    Publication date :

    1976


    Size :

    9 Seiten, 6 Bilder, 6 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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