Enhancing the Permeate Flux Improvement of Direct Contact Membrane Distillation Modules with Inserted S-Ribs Carbon-Fiber Filaments

Ho, C.-D. and Wang, Y.-W. and Chao, Y. and Chew, T.L. and Jiang, M.-S. and Chen, J.-H. and Li, C.-Y. (2024) Enhancing the Permeate Flux Improvement of Direct Contact Membrane Distillation Modules with Inserted S-Ribs Carbon-Fiber Filaments. Membranes, 14 (5).

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Abstract

Three widths of manufacturing S-ribs carbon-fiber filaments acting as turbulence promoters were implemented into the flow channel of direct contact membrane distillation (DCMD) modules to augment the permeate flux improvement in the present study. Attempts to reduce the disadvantageous temperature polarization effect were made by inserting S-ribs turbulence promoters in improving pure water productivity, in which both heat- and mass-transfer boundary layers were diminished due to creating vortices in the flow pattern and increasing turbulence intensity. The temperature polarization coefficient (Formula presented.) was studied and found to enhance device performance (less thermal resistance) under inserting various S-ribs carbon-fiber thicknesses and operating both cocurrent- and countercurrent-flow patterns. The permeate fluxes in the DCMD modules with inserted S-ribs carbon-fiber turbulence promoters were investigated theoretically by developing the mathematical modeling equations and were conducted experimentally with various design and operating parameters. The theoretical predictions and experimental results exhibited a great potential to considerably achieve permeate flux enhancement in the new design of the DCMD system. The DCMD module with inserted S-ribs carbon-fiber turbulence promoters in the flow channel could provide a relative permeate flux enhancement up to 37.77 under countercurrent-flow operations in comparisons with the module of using the empty channel. An economic consideration on both permeate flux enhancement and power consumption increment for the module with inserted S-ribs carbon-fiber filaments was also delineated. © 2024 by the authors.

Item Type: Article
Additional Information: cited By 0
Uncontrolled Keywords: Boundary layers; Carbon fibers; Channel flow; Distillation; Mass transfer; Polarization; Turbulence, Counter-current flow; Direct contact membrane distillation; Direct contact membrane distillation module; Flow channels; Flux enhancement; Permeate flux; Polarization effect; S-rib filament; Temperature polarization; Turbulence promoters, Flow patterns
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 04 Jun 2024 14:19
Last Modified: 04 Jun 2024 14:19
URI: https://khub.utp.edu.my/scholars/id/eprint/19679

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