Computational Studies for the Design Parameters of Hollow Fibre Membrane Modules

Lim, Keng Boon; Wang, Peng Cheng; An, Hongyu; Yu, S. C. M.

doi:10.1016/j.memsci.2017.01.053

Cited by 20 publications

(11 citation statements)

References 18 publications

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“…The assumption of fluid flow within the fibres as an incompressible laminar flow, from previous work [17], is also applied in this current study. Compared with the fibre dimension used in the previous numerical study [17], the fibre inner diameters used in this current study are no larger than 0.5 mm as compared to the 0.625 mm used previously, and fibre length used is fixed at 1 m across all numerical cases. The highest membrane permeability used here is 1500 L/(m 2 •h•bar).…”

Section: Numerical Modelmentioning

confidence: 99%

“…The meshing methodology closely follows that described in [17]. The Grid Independence Test (GIT) was first performed to determine the mesh resolution required.…”

Section: Meshing Of Cfd Modelmentioning

confidence: 99%

“…The numerical methodologies used by Günther et al [12] and Zhuang et al [13] were adopted by Lim et al [17]. A detailed CFD methodology was used to analyse and determine the optimum packing density that should be used in regards to fibre length.…”

Section: Introductionmentioning

confidence: 99%

“…When comparing the feed pressures of fibres with different packing density, the feed pressure profile was determined to be consistent in fibres of packing densities lower than 0.5. Another focus of Lim et al [17] was to study the effects of enlarging inner diameter on permeate pressure profile. Findings indicate that as inner diameter increases, permeate pressure is reduced, and a more uniform pressure profile was observed.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and Computational Analysis on Double-End Submerged Hollow Fibre Membrane Modules

Lim

Wang

et al. 2018

Energies

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This paper studies the potential increase in permeate output flow rate that submerged hollow fibres can achieve when operating in double-end suction. The flow dynamics of submerged hollow fibre membranes with different combinations of fibre inner diameter, membrane thickness, and membrane permeability were numerically simulated. Fibre features (fibre inner diameter, membrane thickness, and membrane permeability) are then characterised for their effects on the increment in permeate flow rate due to change in configuration. Concurrently, an analytical model of a fibre in double-end suction is modelled. Analysis on the double-end fibre model has indicated that the fibre characteristic ratio, λ, has a direct influence on the relative increase in output flow rate when both ends are open. Parametric investigations on the three fibre features have shown that their effects on relative output increase agree with the co-relations indicated by λ. For fibres with λ less than 4, a proportional relationship between a fibre’s λ value and the percentage increment in permeate flow rate is observed when adopting double-end suction. The fibre characteristic ratio, λ, in addition to characterising flux uniformity, can further be used to consider the effectiveness of applying double-end suction in Submerged Hollow Fibre Membrane Module (SHFMM) systems at the design stage.

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Section: Numerical Modelmentioning

confidence: 99%

“…The meshing methodology closely follows that described in [17]. The Grid Independence Test (GIT) was first performed to determine the mesh resolution required.…”

Section: Meshing Of Cfd Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Theoretical and Computational Analysis on Double-End Submerged Hollow Fibre Membrane Modules

Lim

Wang

et al. 2018

Energies

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“…A uniform flow distribution is generally considered an important issue when designing modules, systems, and devices in which fluid flows in membrane modules and reactors [1]. Common industrial modules and devices in water treatment systems, which require a uniform flow distribution, include hollow fiber membrane modules [2][3][4], membrane distillation [5], spacer-filled channels of spiral-wound membranes [6], spacer-filled disk-type membrane modules [7], pressurized sand filters [8], and fuel cells [1]. A uniform flow distribution within modules often has further advantages in improving the mass transfer, controlling the temperature, and decreasing the pressure loss.…”

Section: Introductionmentioning

confidence: 99%

Modeling of flow uniformity by installing inlet distributor within the inflow part of a pressurized module using computational fluid dynamics

Choi

Lee

Kim

2020

Environmental Engineering Research

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Uniform flow distribution is a significant parameter for designing pressurized membrane modules because non-uniform flow distribution can cause serious local flux and fouling problems within a module. Thus, this study investigated the fluid behavior with regards to the evenness of water distribution using newly designed inlet distributors in the inflow part of a pressurized membrane module. From the results of velocity and pressure at the cross-sectional and outlet planes, we confirmed that a conventional membrane module with no distributor (non-distributor) had fluid that was concentrated at the central part. Case 1, which had a cross-shaped distributor, reduced the central concentration tendency, and Case 2, which had a round-shaped distributor, displayed a relatively uniform flow based on the velocity, pressure, flux, and standard deviation data. Here, the non-uniformity coefficient (<i>N</i>) and energy utilization (<i>η</i>) for Cases 1 and 2 showed a lower non-uniformity coefficient (0.030 and 0.017, respectively) than for the Non-distributor (0.039). The energy utilization of Cases 1 and 2 were higher (1.35e-0.5 and 1.46e-05) than the Non-distributor (1.64e-05). Overall, we confirmed that the inlet distributors led to increased evenness of flow distribution within an inflow part.

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Application of computational fluid dynamics technique in microfiltration/ultrafiltration processes

Tas-Koehler

Lerch

2022

Current Trends and Future Developments on (Bio-) Membranes

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Computational Studies for the Design Parameters of Hollow Fibre Membrane Modules

Cited by 20 publications

References 18 publications

Theoretical and Computational Analysis on Double-End Submerged Hollow Fibre Membrane Modules

Theoretical and Computational Analysis on Double-End Submerged Hollow Fibre Membrane Modules

Modeling of flow uniformity by installing inlet distributor within the inflow part of a pressurized module using computational fluid dynamics

Application of computational fluid dynamics technique in microfiltration/ultrafiltration processes

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