Mathematical model of mass transfer in an electrodialyzer with net-like spacers

Data on DC current have been recorded for EDR-III/200-0.8 electrodialysis stack available from MEGA a.s., Czech Republic, as a function of feed electrolyte (NaCl) concentration and applied voltage. The flow rates and temperature have been fixed during the tests. Spacers used between the ion-exchange...

Full description

Saved in:
Bibliographic Details
Published in:Desalination and water treatment 2010-02, Vol.14 (1-3), p.174-178
Main Authors: Tvrznik, D, Machuca, L, Cernin, A
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Electrodialysis
Fluid flow
Mass transfer
mass transfer modeling
Mathematical models
Spacers
Stacks
Turbulence
Turbulent flow
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Data on DC current have been recorded for EDR-III/200-0.8 electrodialysis stack available from MEGA a.s., Czech Republic, as a function of feed electrolyte (NaCl) concentration and applied voltage. The flow rates and temperature have been fixed during the tests. Spacers used between the ion-exchange membranes in the stack are of net-like type. Different approaches to the mathematical modeling of mass transfer in an electrodialyzer have been verified to select one that best fits experimental data obtained for the stack. The “turbulent flow” model has been evaluated to be the most suitable for this purpose. The model assumes uniform distribution of linear velocities, ideal cross mixing of the liquid in the flow phase and presence of the stationary diffusion layer. In addition, a correlation coefficient has been introduced into the model to take the effect of a turbulence promoter on electrical field shielding into account.
ISSN:1944-3986
1944-3994
DOI:10.5004/dwt.2010.1024