Energy and exergy analysis of multi-stage vacuum membrane distillation integrated with mechanical vapor compression

Lin, Bosong; Malmali, Mahdi

doi:10.1016/j.seppur.2022.122568

Cited by 28 publications

(3 citation statements)

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“…In general, coupled MD systems have been widely studied and applied for their ability to tackle brine and use low-grade energy. New types of MD hybrids with mechanical vapor compression (MVC), adsorption desalination (AD), FO, or bioreactors have been researched [ 173 , 174 , 175 , 176 ]. Among the new hybrid MD systems for solution treatment, the integration of MD with FO or a bioreactor is most common.…”

Section: Other Hybrid MD Systemsmentioning

confidence: 99%

Review of Hybrid Membrane Distillation Systems

Zhang,

Xian

2024

Membranes

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Membrane distillation (MD) is an attractive separation process that can work with heat sources with low temperature differences and is less sensitive to concentration polarization and membrane fouling than other pressure-driven membrane separation processes, thus allowing it to use low-grade thermal energy, which is helpful to decrease the consumption of energy, treat concentrated solutions, and improve water recovery rate. This paper provides a review of the integration of MD with waste heat and renewable energy, such as solar radiation, salt-gradient solar ponds, and geothermal energy, for desalination. In addition, MD hybrids with pressure-retarded osmosis (PRO), multi-effect distillation (MED), reverse osmosis (RO), crystallization, forward osmosis (FO), and bioreactors to dispose of concentrated solutions are also comprehensively summarized. A critical analysis of the hybrid MD systems will be helpful for the research and development of MD technology and will promote its application. Eventually, a possible research direction for MD is suggested.

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Section: Other Hybrid MD Systemsmentioning

confidence: 99%

Review of Hybrid Membrane Distillation Systems

Zhang,

Xian

2024

Membranes

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“…Currently, some desalination studies treat saline solutions as ideal solutions [ 25 ], which simply assume an ideal behavior for a nonideal electrolyte solution and do not consider the dissociation of the solute. However, the ionic components in the saline feed have a notable influence on the phase equilibrium properties, such as vapor pressure and solubilities of gases and salts, especially for high-salinity brines [ 16 , 26 , 27 , 28 , 29 ]. Different approaches have been proposed to take into account the nonideal behavior of the aqueous electrolyte solution, such as correlations for seawater thermodynamic properties [ 30 ], the Pitzer model [ 31 ], and the electrolyte NRTL models [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Comparative Energetics of Various Membrane Distillation Configurations and Guidelines for Design and Operation

Islam

Lin

et al. 2023

Membranes

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This paper presents a comparative performance study of single-stage desalination processes with major configurations of membrane distillation (MD) modules. MD modules covered in this study are (a) direct contact MD (DCMD), (b) vacuum MD (VMD), (c) sweeping gas MD (SGMD), and d) air gap MD (AGMD). MD-based desalination processes are simulated with rigorous theoretical MD models supported by molecular thermodynamic property models for the accurate calculation of performance metrics. The performance metrics considered in MD systems are permeate flux and energy efficiency, i.e., gained output ratio (GOR). A general criterion is established to determine the critical length of these four MDs (at fixed width) for the feasible operation of desalination in a wide range of feed salinities. The length of DCMD and VMD is restricted by the feed salinity and permeate flux, respectively, while relatively large AGMD and SGMD are allowed. The sensitivity of GOR flux with respect to permeate conditions is investigated for different MD configurations. AGMD outperforms other configurations in terms of energy efficiency, while VMD reveals the highest permeate production. With larger MD modules, utilization of thermal energy supplied by the hot feed for evaporation is in the order of VMD > AGMD > SGMD > DCMD. Simulation results highlight that energy efficiency of the overall desalination process relies on the efficient recovery of spent for evaporation, suggesting potential improvement in energy efficiency for VMD-based desalination.

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“…In recent years, new configurations with improved energy efficiency and permeation flow have been developed, including material gap MD, permeate gap MD, multi-stage MD, multi-effect MD, vacuum multi-effect MD, and hollow fiber multi-effect MD [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Phenomena in Membrane Distillation

2023

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Water scarcity raises important concerns with respect to human sustainability and the preservation of important ecosystem functions. To satisfy water requirements, seawater desalination represents one of the most sustainable solutions. In recent decades, membrane distillation has emerged as a promising thermal desalination process that may help to overcome the drawbacks of traditional desalination processes. Nevertheless, in membrane distillation, the temperature at the feed membrane interface is significantly lower than that of the bulk feed water, due to the latent heat flux associated with water evaporation. This phenomenon, known as temperature polarization, in membrane distillation is a crucial issue that could be responsible for a decay of about 50% in the initial transmembrane water flux. The use of plasmonic nanostructures, acting as thermal hotspots in the conventional membranes, may improve the performance of membrane distillation units by reducing or eliminating the temperature polarization problem. Furthermore, an efficient conversion of light into heat offers new opportunities for the use of solar energy in membrane distillation. This work summarizes recent developments in the field of plasmonic-enhanced solar evaporation with a particular focus on solar-driven membrane distillation applications and its potential prospects.

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Energy and exergy analysis of multi-stage vacuum membrane distillation integrated with mechanical vapor compression

Cited by 28 publications

References 50 publications

Review of Hybrid Membrane Distillation Systems

Review of Hybrid Membrane Distillation Systems

Comparative Energetics of Various Membrane Distillation Configurations and Guidelines for Design and Operation

Plasmonic Phenomena in Membrane Distillation

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