Design optimization of high performance dual stage pressure retarded osmosis

Ali Altaee, Nidal Hilal

Research output: Contribution to journalArticle

11 Citations (Scopus)

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
Pages (from-to)217-224
Number of pages8
JournalDesalination
Volume355
DOIs
Publication statusPublished - 1 Jan 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

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

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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