Three-dimensional modeling and simulation of multilayer spacers for spiral wound membrane modules

Abstract

Three-layer spacer configurations for feed channels in spiral wound membrane modules are analyzed. The simulation results indicate that complex flow structures are generated by the presence of spacers, which favor the mass transfer in the vicinity of the membrane sheets. By making a comparison with conventional two-layer configurations, it was found that three-layer arrangements of circular spacers with immersion grades of 0.5, 0.6, and 0.7 result in higher average mass transfer coefficients, suggesting a feasible implementation of this type of spacer configurations in full-scale membrane modules.