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Leakage currents in electrodialytic desalting and brine production

Authors
Journal
Desalination
0011-9164
Publisher
Elsevier
Publication Date
Volume
1
Issue
2
Identifiers
DOI: 10.1016/s0011-9164(00)84017-5

Abstract

Abstract The effective electrical leakage, as a fraction, is given by the equation which includes the effect of external leakage through manifolds with resistance ε. Even wide variations of the compartment pair resistance R were found to have little effect on the total leakage and for a leakage calculation it usually suffices to use an average value for R. In many applications of electrodialysis it is more important to have a high resistance r between compartments and flow channels than a high flow channel resistance δ (the ratio being reflected in γ=(δ+ R)/ r). The number of compartment pairs (2 N) in a membrane pack is limited in any case because of mechanical and flow distribution problems and with respect to the latter low values of δ (large flow channels) are desirable. The results shown invalidate some of the conclusions appearing in the earlier literature.

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