Numerical studies of the impact of spacer geometry on concentration polarization in spiral wound membrane modules

  • Song L
  • Ma S
  • 28

    Readers

    Mendeley users who have this article in their library.
  • 29

    Citations

    Citations of this article.

Abstract

The impact of the geometry of spacer filaments on concentration polarization and permeate flux in spiral wound reverse osmosis modules was studied using the 2-D streamline upwind Petrov/Galerkin finite element model. In this study, both salt concentrations and flow velocities on membrane surface are determined as results of numerical solution of the coupled governing equations for momentum and mass transfers, which is more appropriate for most applications of the spiral wound membrane modules. The patterns of concentration polarization along the spacer-filled membrane channel were first investigated respectively for the membranes attached to and opposite to the transverse filaments. The patterns were then analyzed with the hydraulic characteristics (e.g., reattachment point and recirculation) of flow in the membrane channel for the implications to the system performance. Finally, the effect of filament shape and size of the spacer on concentration polarization and system performance was simulated and discussed. The results suggest concentration polarization in spiral wound RO modules could be significantly alleviated by spacer optimization.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Lianfa Song

  • Shengwei Ma

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free