Effect of feed spacer size and mesh length on permeate flux enhancement driven by forced slip velocity /
Foo, Kathleen,
Effect of feed spacer size and mesh length on permeate flux enhancement driven by forced slip velocity / Foo Kathleen - xiii, 55 pages : illustrations (some color) ; 30 cm. + 1 CD-ROM
Faculty of Chemical and Process Engineering Technology
Thesis (Master of Science) -- Universiti Malaysia Pahang – 2020
Includes bibliographical references
Spiral-wound membrane (SWM) modules have been an important role in industrial desalination and water treatment processes. Concentration polarisation (CP) is a critical problem for membrane processes because prolonged solute accumulation near the membrane surface reduces the membrane performance and promotes fouling. Recent studies have shown that the interactions between forced transient flow and eddy inducers (i.e. spacers) in the SWM modules result in significant permeate flux enhancement and reduction in concentration polarisation. Forced slip velocity is the movement of thin fluid layer adjacent to the membrane surface, which disrupts the concentration boundary layer and promotes mixing in membrane systems. The aim of this thesis is to study the effect of SWM feed spacer geometry on the resonant frequency of forced-slip and the resulting permeate flux enhancement generated by forced-slip perturbation. This thesis uses Computational Fluid Dynamics (CFD) code to simulate and investigate the effect of varying the spacer geometric parameters on the resonant frequency for an unsteady forced-slip, as well as the resulting membrane performance, for a 2D zig-zag spacer. The analysis shows that the resonant frequency is significantly affected by the interaction of the shear layer with successive downstream spacers. The effectiveness of forced-slip reaches a peak (up to 15.6% flux increase) for a spacer size in the range of 0.5
THE0008947(Local)
Faculty of Chemical and Process Engineering Technology--Dissertations
Universities and colleges--Dissertations
Theses
Effect of feed spacer size and mesh length on permeate flux enhancement driven by forced slip velocity / Foo Kathleen - xiii, 55 pages : illustrations (some color) ; 30 cm. + 1 CD-ROM
Faculty of Chemical and Process Engineering Technology
Thesis (Master of Science) -- Universiti Malaysia Pahang – 2020
Includes bibliographical references
Spiral-wound membrane (SWM) modules have been an important role in industrial desalination and water treatment processes. Concentration polarisation (CP) is a critical problem for membrane processes because prolonged solute accumulation near the membrane surface reduces the membrane performance and promotes fouling. Recent studies have shown that the interactions between forced transient flow and eddy inducers (i.e. spacers) in the SWM modules result in significant permeate flux enhancement and reduction in concentration polarisation. Forced slip velocity is the movement of thin fluid layer adjacent to the membrane surface, which disrupts the concentration boundary layer and promotes mixing in membrane systems. The aim of this thesis is to study the effect of SWM feed spacer geometry on the resonant frequency of forced-slip and the resulting permeate flux enhancement generated by forced-slip perturbation. This thesis uses Computational Fluid Dynamics (CFD) code to simulate and investigate the effect of varying the spacer geometric parameters on the resonant frequency for an unsteady forced-slip, as well as the resulting membrane performance, for a 2D zig-zag spacer. The analysis shows that the resonant frequency is significantly affected by the interaction of the shear layer with successive downstream spacers. The effectiveness of forced-slip reaches a peak (up to 15.6% flux increase) for a spacer size in the range of 0.5
THE0008947(Local)
Faculty of Chemical and Process Engineering Technology--Dissertations
Universities and colleges--Dissertations
Theses