Analysis and design of direct contact membrane distillation

Deshpande, Jaydeep; Nithyanandam, Karthik; Pitchumani, R.

doi:10.1016/j.memsci.2016.10.004

Cited by 25 publications

(18 citation statements)

References 32 publications

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“…The configurations that have been developed in MD process are DCMD, VMD, AGMD, SGMD, LGMD, TSGMD, and VA-AGMD (Garcia-Payo et al, 2002;Rivier et al, 2002;Ugrozov et al, 2003;Ugrozov and Kataeva, 2004;Khayet and Matsuura, 2011e;Adham et al, 2013;Essalhi and Khayet, 2014;Prince et al, 2015;Ashoor et al, 2016;Deshpande et al, 2017;Liu Z. et al, 2017;Amaya-Vías et al, 2018). The schematic diagrams representing the heat and mass transfer for these configurations using plate and frame module and flat sheet membranes are presented in Figures 1-7.…”

Section: Configurationsmentioning

confidence: 99%

“…All these configurations are based on heat and mass transfer phenomena (Khayet, 2011). Most of the bench-scale work conducted to evaluate MD process has focused on DCMD configuration due to its simplicity in structure design and process operation (Eleiwi et al, 2016;Gustafson et al, 2016); however, for field or commercial applications, the focus has been on AGMD and VMD configurations (Gude et al, 2013;Lee et al, 2015;Cheng et al, 2016;Deshpande et al, 2017;Ruiz-Aguirre et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…One of the major ways to reduce the effects of temperature and concentration polarization in the MD system is by making the temperature at the surface of the membrane in contact with the feed side to be almost equal to the temperature of the bulk feed solution. This can be possible by increasing the feed flow rate so as to establish suitable hydrodynamic conditions favored under turbulent flow regime (Essalhi and Khayet, 2014;Deshpande et al, 2017). The heat transfer concept adopted by MD models is usually based on correlations originally developed for heat transfer through non-porous and rigid heat exchangers (Hayer et al, 2015;Orfi et al, 2016;Swaminathan et al, 2016b).…”

Section: Introductionmentioning

confidence: 99%

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Heat and Mass Transport in Modeling Membrane Distillation Configurations: A Review

2018

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Identification and mitigation of challenges associated with membrane distillation (MD) modeling are very crucial to the applicability of MD technology in the industry. Several research studies have been carried out on direct contact membrane distillation (DCMD) modeling because of its simplicity, while other MD configurations have gained little attention. Most studies conducted on MD modeling were achieved based on uniform membrane pore size and pore size distribution assumption. This study exploits the homogeneity of these assumptions to conduct a modeling review for temperature polarization (TP) and concentration polarization (CP), as they apply to MD configurations. TP and CP phenomena have been identified as two of the main challenges to advance MD modeling for further development of MD technology. Their impact are detailed in the heat and mass transfer mechanisms discussed. Thermal conductivity of common hydrophobic commercial membrane materials at different temperatures are presented in this study. The use of optimal operating flow rates, suitable membranes, and proper module design are recommended as viable solutions to reduce the effect of TP and CP on permeate flux decay.

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Section: Configurationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Heat and Mass Transport in Modeling Membrane Distillation Configurations: A Review

2018

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“…In air gap membrane distillation (AGMD), an air gap separates a condensing sur-face from the membrane by AGMD, and in vacuum membrane distillation (VMD), vacuum exists between the membrane and the condenser [8,9]. In general, the DCMD configuration, which is the simplest configuration with the capability of easy operation, is known as a suitable technology for water treatment application [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Analysis of thermal energy efficiency for hollow fiber membranes in direct contact membrane distillation

Park

Lee

2018

Environmental Engineering Research

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Although membrane distillation (MD) has great promise for desalination of saline water sources, it is crucial to improve its thermal efficiency to reduce the operating cost. Accordingly, this study intended to examine the thermal energy efficiency of MD modules in a pilot scale system. Two different modules of hollow fiber membranes were compared in direct contact MD mode. One of them was made of polypropylene with the effective membrane area of 2.6 m 2 and the other was made of polyvinylidene fluoride with the effective membrane area of 7.6 m 2. The influence of operation parameters, including the temperatures of feed and distillate, feed flow rate, and distillate flow rate on the flux, recovery, and performance ratio (PR), was investigated. Results showed that the two MD membranes showed different flux and PR values even under similar conditions. Moreover, both flow rate and temperature difference between feed and distillate significantly affect the PR values. These results suggest that the operating conditions for MD should be determined by considering the module properties.

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“…In the MD system, a hot saline stream and cold permeate stream are segregated by a porous and hydrophobic membrane. The hydrophobicity of a membrane causes to pass only vapor through the membrane pores and does not allow the feed solution for penetrating into the membrane pores, consequently wetting them . As a result of the temperature difference between both hot and cold flows, the transmembrane vapor pressure creates and causes to traverse evaporated water molecules from the feed solution to the permeate side , .…”

Section: Introductionmentioning

confidence: 99%

Poly(vinylidene difluoride) Membrane Assisted by Modified ZnO/ZIF Nanoparticles for Membrane Distillation

2018

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Poly(vinylidene difluoride) (PVDF) polymeric membranes incorporated by synthesized hydrophobic agents were applied for membrane distillation. ZnO nanoparticles were modified with a silane coupling agent (n‐octyltriethoxysilane) and coupled by zeolite imidazole framework (ZIF)‐8 crystals. In particular, hydrophobic and porous membranes were prepared with ZIF crystals and modified ZnO/ZIF‐coupled nanoparticles. The influences of feed concentration and temperature of NaCl solution and seawater during filtration were evaluated. The hydrophobic modified membranes showed a higher permeate flux than pure PVDF membranes at different feed concentrations and feed temperatures. After modification, the porosity increased significantly and the contact angle became larger.

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Analysis and design of direct contact membrane distillation

Cited by 25 publications

References 32 publications

Heat and Mass Transport in Modeling Membrane Distillation Configurations: A Review

Heat and Mass Transport in Modeling Membrane Distillation Configurations: A Review

Analysis of thermal energy efficiency for hollow fiber membranes in direct contact membrane distillation

Poly(vinylidene difluoride) Membrane Assisted by Modified ZnO/ZIF Nanoparticles for Membrane Distillation

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