Membrane Distillation: Principle, Advances, Limitations and Future Prospects in Food Industry

Onsekizoglu, Pelin

doi:10.5772/37625

Cited by 39 publications

(55 citation statements)

References 160 publications

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“…It can be observed that Nu (2) and Sh (2) are always lower than Nu (1) and Sh (1) , and that the difference increases with Re. Note also that the difference between Sh (1) and Sh (2) (Sc=600) is larger than that between Nu (1) and Nu (2) (Pr=4). …”

Section: Average Coefficientsmentioning

confidence: 87%

“…On the contrary, when a uniform heat flux is imposed, q " w is a constant (say, q " w 0 ) and one has (1 ) " 0 ( 2 ) " 0 1 1 N u c o n s t a n t N u c o n s t a n t since the average of the reciprocal is not the reciprocal of the average. The difference between the two definitions is illustrated in Figure 3, which reports average Nusselt and Sherwood numbers, computed by using definitions (8) and (9) for the average heat (mass) transfer coefficients and 2H as the length scale.…”

Section: Average Coefficientsmentioning

confidence: 99%

“…Figure 5 shows the behavior of the averages Nu (1) and Nu (2) as functions of R for one-side heat transfer, =45° and P/H=4, Re42 (graph a) or P/H=2, Re126 (graph b). The more reliable of the two averages, i.e., Nu (2) , decreases monotonically with R in both cases; the highest values of Nu (2) are attained for R=0 (isothermal wall conditions) and the lowest for R.…”

Section: Influence Of the Boundary Conditions At The Wallsmentioning

confidence: 99%

“…Membrane processes offer examples of heat or mass transfer in plane channels bearing mixing promoters of more or less tortuous geometry, aimed at reducing temperature or concentration polarization phenomena thus improving the process performance [1,2]. Promoters usually consist of polymeric filaments and play also the role of spacers, keeping a fixed distance between the opposite channel walls.…”

Section: Heat and Mass Transfer In Spacer-filled Channelsmentioning

confidence: 99%

“…Obvious modifications apply in the case of mass transfer. Dimensionless numbers Nu (1) , Nu (2) or Sh (1) , Sh (2) can be obtained from the above definitions by choosing a suitable length scale. Nu (1) and Nu (2) coincide when a uniform wall temperature is imposed, while they differ when a uniform wall heat flux or a wall thermal resistance are imposed.…”

Section: Average Coefficientsmentioning

confidence: 99%

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Section: Average Coefficientsmentioning

confidence: 87%

Section: Average Coefficientsmentioning

confidence: 99%

Section: Influence Of the Boundary Conditions At The Wallsmentioning

confidence: 99%

Section: Heat and Mass Transfer In Spacer-filled Channelsmentioning

confidence: 99%

Section: Average Coefficientsmentioning

confidence: 99%

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Mode of Operation in Membrane Contactors

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A review of nanoparticle‐enhanced membrane distillation membranes: membrane synthesis and applications in water treatment

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Membrane distillation (MD) is a thermally driven process that uses low‐grade energy to operate and has been extensively explored as an alternative cost‐effective and efficient water treatment process compared to conventional membrane processes. MD membranes are synthesized from hydrophobic polymers, e.g. polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) or polypropylene (PP), using various methods including phase inversion and electrospinning techniques. Recent literature on MD membranes clearly shows their important role in surface water/wastewater treatment and seawater desalination. Modification of MD membranes with nanoscale materials significantly improves their performance, preventing wetting and fouling. This review presents a critical assessment of the progress on the use of nanomaterials for the modification of MD membranes. The techniques commonly used to synthesize MD membranes, the modifications that have been adopted for the incorporation of nanomaterials onto membranes, and the unique properties these nanomaterials impart on the membranes are discussed. The use of modified membranes in different MD configurations and their application in groundwater, surface water, wastewater, brackish water and seawater treatment is reviewed. Finally, cost implications, commercial viability, environmental sustainability, and future prospects of MD are also discussed to elucidate promising approaches for a future and successful implementation of MD at an industrial scale. © 2019 Society of Chemical Industry

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Membrane Distillation: Principle, Advances, Limitations and Future Prospects in Food Industry

Cited by 39 publications

References 160 publications

Influence of the boundary conditions on heat and mass transfer in spacer-filled channels

Influence of the boundary conditions on heat and mass transfer in spacer-filled channels

Mode of Operation in Membrane Contactors

A review of nanoparticle‐enhanced membrane distillation membranes: membrane synthesis and applications in water treatment

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