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Reverse Osmosis Desalination Module: Three Dimensional, Transient Analyses

[+] Author Affiliations
Ali E. Anqi, Mustafa Usta, Mohammed Alrehili, Alparslan Oztekin

Lehigh University, Bethlehem, PA

Nawaf Alkhamis

King Abdulaziz University, Jeddah, Saudi Arabia

Paper No. IMECE2016-65890, pp. V007T09A033; 8 pages
doi:10.1115/IMECE2016-65890
From:
  • ASME 2016 International Mechanical Engineering Congress and Exposition
  • Volume 7: Fluids Engineering
  • Phoenix, Arizona, USA, November 11–17, 2016
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5061-9
  • Copyright © 2016 by ASME

abstract

The desalination process using reverse osmosis membrane is used around the globe to produce fresh water. In the present paper, simulations are conducted to examine steady and transient nature of the flow inside a three dimensional desalination module containing cylindrical spacers. Navier-Stokes and mass transport equations are solved to determine the flow and concentration field in the feed channel for Reynolds number of 800. The spiral wound membrane is treated as a functional surface where the solution-diffusion model is applied. The flow and the concentration field are strongly three dimensional and transient in nature. The present authors demonstrated that the momentum mixing induced by the presence of spacers enhances the flux performance of the membrane. It is also shown that transient effects and the secondary flows induced by three dimensional flow transitions are mitigating the concentration polarization and fouling/scaling that occurs along the surface of the membrane.

Copyright © 2016 by ASME

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