Design optimization of high performance dual stage pressure retarded osmosis

Ali Altaee, Nidal Hilal

    Research output: Contribution to journalArticle

    Abstract

    Dual stage PRO process was proposed for power generation. The present study evaluated two design configurations of the dual stage PRO process. The old dual stage PRO design was modified to enhance the process performance. In the new design, the entire seawater flow from the first stage goes to the second stage to increase the second stage membrane flux. Seawater salinities between 32. g/L and 45. g/L were tested to investigate the effect of draw solution TDS on the process performance. The results showed that PRO process performed better at higher seawater salinity. Furthermore, the performance of the new dual stage PRO design was higher than that of the old dual stage PRO process. Power density in the new dual stage PRO design was 17.4% higher than that in the old dual stage PRO design. Mainly, this was attributed to the higher membrane flux in the modified PRO design. It was also found that the specific power consumption of the new PRO design was about 8% less than that of the old PRO design. Finally, the results also showed that for a given plant capacity, the membrane elements required in the new PRO design were less than that in the old PRO design. As such, the proposed new design would be suggested for power generation for being more efficient and at cheaper cost.

    Original languageEnglish (US)
    Pages (from-to)217-224
    Number of pages8
    JournalDesalination
    Volume355
    DOIs
    StatePublished - Jan 1 2015

    Fingerprint

    Osmosis
    osmosis
    Seawater
    membrane
    seawater
    Membranes
    power generation
    Power generation
    Design optimization
    Fluxes
    salinity
    Electric power utilization

    Keywords

    • Dual stage PRO process
    • High performance PRO process
    • Osmotic energy
    • Pressure retarded osmosis
    • Renewable energy

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Materials Science(all)
    • Water Science and Technology
    • Mechanical Engineering

    Cite this

    Design optimization of high performance dual stage pressure retarded osmosis. / Altaee, Ali; Hilal, Nidal.

    In: Desalination, Vol. 355, 01.01.2015, p. 217-224.

    Research output: Contribution to journalArticle

    Altaee, Ali ; Hilal, Nidal. / Design optimization of high performance dual stage pressure retarded osmosis. In: Desalination. 2015 ; Vol. 355. pp. 217-224.
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