Heat and mass transfer in vacuum membrane distillation

Mengual, J.I.; Khayet, M.; Godino, M.P.

doi:10.1016/j.ijheatmasstransfer.2002.09.001

Cited by 249 publications

(132 citation statements)

References 24 publications

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“…The second concerns with the overall modeling for predicting the permeate flux at given operation conditions [5]. A linear relationship between Heat flux (Q) the mass flux (J m ) and the water vapor pressure difference ΔP v across the membrane was suggested to describe the water vapor transport in MD and the basic equation is given by the general expressions [1,2,6]:…”

Section: Mass Transfermentioning

confidence: 99%

“…The mass transfer coefficient C m can be determined experimentally or theoretically [6,7]. For pure liquid, the water vapor pressure at liquid-vapor interface can be calculated using the Antoine equation [2,6]:…”

Section: Mass Transfermentioning

confidence: 99%

“…The separation mechanism of membrane distillation is based on the principle of vaporliquid equilibrium [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Importantly, this is considered by most researchers to be a better alternative to traditional desalination processes such as reverse osmosis (RO), multistage flash distillation (MSF), electrodialysis (ED), and so forth. MD produces ultrapure water without high temperatures or high pressures [2].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Experimental Investigation of Heat and Mass Transfer in Tubular Membrane Distillation Module for Desalination

Alanezi

Sharif

Sanduk

et al. 2012

ISRN Chemical Engineering

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Membrane distillation is a thermally driven membrane process for seawater desalination and purification at moderate temperatures and pressures. A hydrophobic micro-porous membrane is used in this process, which separates hot and cold water, allowing water vapor to pass through; while restricting the movement of liquid water, due to its hydrophobic nature. This paper provides an experimental investigation of heat and mass transfer in tubular membrane module for water desalination. Different operating parameters have been examined to determine the mass transport mechanism of water vapor. Based on the experimental results, the effects of operating parameters on permeate flux and the heat transfer analysis have been presented and discussed in details.

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Section: Mass Transfermentioning

confidence: 99%

Section: Mass Transfermentioning

confidence: 99%

“…The separation mechanism of membrane distillation is based on the principle of vaporliquid equilibrium [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Investigation of Heat and Mass Transfer in Tubular Membrane Distillation Module for Desalination

Alanezi

Sharif

Sanduk

et al. 2012

ISRN Chemical Engineering

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“…In VMD permeate pressure is kept low, which results in a relatively large mean free path as it is inversely proportional to the pressure [10]. In typical VMD operating conditions, Knudsen numbers vary from 14 to 17 for membrane pore size of 0.2 µm [34]. Therefore, many studies on VMD only consider Knudsen diffusion [35,34,27].…”

Section: Mass Transfer Modelmentioning

confidence: 99%

Multistage vacuum membrane distillation (MSVMD) systems for high salinity applications

Chung

Swaminathan

Warsinger

et al. 2016

Journal of Membrane Science

101

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Multistage membrane distillation (MD) systems can have significantly higher efficiencies than their single stage counterparts. However, multistage MD system design has received limited attention. In this paper, the performance of a multistage vacuum membrane distillation (MSVMD) which is thermodynamically similar to a multi-stage flash distillation (MSF) is evaluated for desalination, brine concentration, and produced water reclamation applications. A wide range of solution concentrations were accurately modeled by implementing Pitzer's equations for NaCl-solution properties. The viability of MSVMD use for zero liquid discharge (ZLD) applications is investigated, by considering discharge salinities close to NaCl saturation conditions. Energy efficiency (gained output ratio or GOR), second law efficiency, and the specific membrane area were used to quantify the performance of the system. At high salinities, the increased boiling point elevation of the feed stream resulted in lower fluxes, larger heating requirements and lower GOR values. The second law efficiency, however, is higher under these conditions since the least heat for separation increases faster than the system's specific energy consumption with increase in salinity. Under high salinity conditions, the relative significance of irreversible losses is lower. Results indicate that MSVMD systems can be as efficient as a conventional MSF system, while using reasonable membrane areas and for a wide range of feed salinities. Given MD's advantages over MSF such as lower capital requirement and scalability, MSVMD can be an attractive alternative to conventional thermal desalination systems.Keywords: GOR; second law efficiency; VMD; high salinity; multistage; ZLD; produced water * Corresponding author: lienhard@mit.edu * * Citation: H.W. Chung, J. Swaminathan, D.M. Warsinger and J.H. Lienhard V. "Multistage vacuum membrane distillation (MSVMD) systems for high salinity applications," J. Membrane Sci.,497:128-141, 1 Jan. 2016.

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Membrane Distillation

Khayet

2008

Advanced Membrane Technology and Applications

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Heat and mass transfer in vacuum membrane distillation

Cited by 249 publications

References 24 publications

Experimental Investigation of Heat and Mass Transfer in Tubular Membrane Distillation Module for Desalination

Experimental Investigation of Heat and Mass Transfer in Tubular Membrane Distillation Module for Desalination

Multistage vacuum membrane distillation (MSVMD) systems for high salinity applications

Membrane Distillation

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