CFD simulation of heat and mass transport for water transfer through hydrophilic membrane in direct-contact membrane distillation process

Hasanizadeh, Mohsen; Jafari, Pooya; Farshighazani, Babak; Moraveji, Mostafa Keshavarz

doi:10.1080/19443994.2015.1094675

Cited by 20 publications

(6 citation statements)

References 27 publications

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“…Hasanizadeh et al [25] used COMSOL v3.4 to model a 2D representation of a flat DCMD module. However, their model does not include the contribution of vapor transport to overall heat transfer across the membrane.…”

Section: Introductionmentioning

confidence: 99%

Effect of feed flow pattern on the distribution of permeate fluxes in desalination by direct contact membrane distillation

et al. 2017

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The current study aims to highlight the effect of flow pattern on the variations of permeate fluxes over the membrane surface during desalination in a direct contact membrane distillation (DCMD) flat module. To do so, a three dimensional (3D) Computational Fluid Dynamics (CFD) model with embedded pore scale calculations is implemented to predict flow, heat and mass transfer in the DCMD module. Model validation is carried out in terms of average permeate fluxes with experimental data of seawater desalination using two commercially available PTFE membranes. Average permeate fluxes agree within 6% and less with experimental values without fitting parameters. Simulation results show that the distribution of permeate fluxes and seawater salinity over the membrane surface are strongly dependent on momentum and heat transport and that temperature and concentration polarization follow closely the flow distribution. The analysis reveals a drastic effect of recirculation loops and dead zones on module performance and recommendations to improve MD flat module design are drawn consequently.

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Section: Introductionmentioning

confidence: 99%

Effect of feed flow pattern on the distribution of permeate fluxes in desalination by direct contact membrane distillation

et al. 2017

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“…In order to understand the weak effect of the membrane permeate side temperature on the permeate fluxes in both approaches, a global view of the permeate flux distribution as a function of the feed side and permeate side membrane temperature is given in Figure 11, where the permeate flux is computed using Eqs. (20) to (24). The white inclined lines represent isovalues of the difference between the feed and the permeate sides temperatures of the membrane.…”

Section: Permeate Sidementioning

confidence: 99%

“…Numerical modeling is now very well established to support engineering development and minimize trial and error expensive procedures. CFD has been used extensively to investigate transport phenomena in DCMD modules and abundant literature is now available using 2D and 3D approaches with different coupling levels between feed and permeate sides [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…However, the adaptation of commercial CFD codes to coupled mass and heat transfer across the membrane in a conjugate approach is not straightforward. Likewise, the conjugate approach evolved from sole contribution of conduction to heat transfer across the membrane [18,24,31] to a higher extent of coupling [22,32] and 3 eventually full account of the contribution of both conduction and species evaporation to heat transfer [11,12,15,19].…”

Section: Introductionmentioning

confidence: 99%

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Direct contact membrane distillation module scale-up calculations: Choosing between convective and conjugate approaches

Soukane

Lee

Ghaffour

2019

Separation and Purification Technology

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Membrane distillation (MD) process technology is swiftly moving to industrial prototyping where efficient scale-up calculations are crucial to shorten product development cycle. The aim of this numerical investigation is to suggest the best modeling strategy that will enable to innovate; modify or check new direct contact MD (DCMD) module designs or operation in a timely manner. Two main modeling strategies are presented, namely convective and conjugate approaches. For a given flat module, it is shown that replacing the permeate side by a modified convection boundary condition that accounts for every known resistance to heat transfer gives similar results in the feed side as a coupled conjugate approach where the membrane, with a modified thermal conductivity, is part of the computational domain. The two methods are compared for different module lengths in terms of permeate flux and temperature distribution.Simulation time reports show the important gain in CPU time when using the convective approach while retaining desired calculation accuracy during scale-up. Furthermore, investigations were carried out to assess the effect of 3D inlet and outlet effects. Results for a laboratory scale module suggest that the convective approach can be safely used during early design stages and scale-up of single modules in the range of high permeate fluxes, while the conjugate approach has to be used for an accurate prediction of permeate temperatures needed in heat recovery strategy and equipment design. Highlights Conjugate vs convective CFD modeling is implemented and compared for DCMD  Temperature and permeate flux distribution for several module lengths is studied  The convective approach is less CPU demanding  The convective approach can be used safely for early DCMD module design  The conjugate approach need to be used for overall DCMD module operation

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“…The authors used the commercial package COMSOL and find out that the maximum error obtained from their numerical model is 15%. Another work reporting CFD analysis of DCMD is given in Hasanizadeh et al [27]. To improve the accuracy of their simulations, authors use a composition of Poiseuille and Knudsen diffusion coefficient.…”

Section: Introductionmentioning

confidence: 99%

A three-dimensional model for the heat and mass transfer in air-gap membrane distillation

Cramer¹,

Ničeno²,

Prasser³

et al. 2021

Desalination and Water Treatment

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CFD simulation of heat and mass transport for water transfer through hydrophilic membrane in direct-contact membrane distillation process

Cited by 20 publications

References 27 publications

Effect of feed flow pattern on the distribution of permeate fluxes in desalination by direct contact membrane distillation

Effect of feed flow pattern on the distribution of permeate fluxes in desalination by direct contact membrane distillation

Direct contact membrane distillation module scale-up calculations: Choosing between convective and conjugate approaches

A three-dimensional model for the heat and mass transfer in air-gap membrane distillation

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