The potential of hollow fiber vacuum multi-effect membrane distillation for brine treatment

Li, Qiyuan; Omar, Amr; Cha-Umpong, Withita; Liu, Qian; Li, Xiaopeng; Wen, Jie; Wang, Yinfeng; Razmjou, Amir; Guan, Jing; Taylor, Robert A.

doi:10.1016/j.apenergy.2020.115437

Cited by 33 publications

(15 citation statements)

References 32 publications

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“…Recently, osmotic heat engines (OHEs) consisting of a solution regeneration module and power generation module have attracted increasing attentions due to their higher theoretic efficiency than conventional heat-to-electricity technologies for harvesting low-grade waste heat ( Zhao et al., 2020a ; Hu et al., 2019 ). In the solution regeneration module, salt solution is driven by the low-grade heat source and separated into concentrated and diluted streams via distillation technologies such as membrane distillation (MD) and multieffect distillation (MED) ( Long et al., 2018 ; Li et al., 2020b ). The Gibbs free energy of mixing of the regenerated solutions at different concentrations is then converted to electric power via reverse electrodialysis (RED) or pressure-retarded osmosis (PRO) power generation system ( Ortega-Delgado et al., 2019 ; Post et al., 2007 ).…”

Section: Introductionmentioning

confidence: 99%

Screening metal-organic frameworks for adsorption-driven osmotic heat engines via grand canonical Monte Carlo simulations and machine learning

et al. 2021

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Summary Adsorption-driven osmotic heat engines offer an alternative way for harvesting low-grade waste heat below 80°C. In this study, we performed a high-throughput computational screening based on grand canonical Monte Carlo simulations to identify the high-performance metal-organic frameworks (MOFs) from 1322 computationally ready experimental MOF structures for adsorption-driven osmotic heat engines with LiCl-methanol as the working fluid. Structure-property relationship analysis reveals that MOFs exhibiting high energy efficiency possess large working capacity, pore size and surface area, and moderate adsorption enthalpy comparable to the evaporation enthalpy. Furthermore, machine learning is employed to accelerate the computational screening for satisfied MOFs via the structure properties. The optimal structure properties of the MOFs are further identified via the ensemble-based regression model by optimizing the energy efficiency via the genetic algorithm, which shed light on rationally designing and fabricating MOFs for desired heat-to-electricity conversion.

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Section: Introductionmentioning

confidence: 99%

Screening metal-organic frameworks for adsorption-driven osmotic heat engines via grand canonical Monte Carlo simulations and machine learning

et al. 2021

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“…Membrane technology, including polymeric membranes, is one of the best-advanced separation and treatment systems that have been widely used in different applications such as desalination, wastewater treatment, oil/water separation, and water reuse applications [1,2]. Hollow fiber membranes (HFMs) possess desired and competitive advantages relative to flat-sheet membranes for many membrane separation applications due to high membrane surface area per volume of a module (e.g., the ratio of area per volume is reported 40 m 2 /m 3 for flat sheet and 170 m 2 /m 3 for HFMs [3]). They also have high permeability and porosity, desirable filtration efficiency, proper mechanical properties, selfsupported structure and characteristics, small footprint, high packing density relative to other configurations, ease of handling and maintenance [4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Effective Parameters on Fabrication and Modification of Braid Hollow Fiber Membranes: A Review

et al. 2021

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Hollow fiber membranes (HFMs) possess desired properties such as high surface area, desirable filtration efficiency, high packing density relative to other configurations. Nevertheless, they are often possible to break or damage during the high-pressure cleaning and aeration process. Recently, using the braid reinforcing as support is recommended to improve the mechanical strength of HFMs. The braid hollow fiber membrane (BHFM) is capable apply under higher pressure conditions. This review investigates the fabrication parameters and the methods for the improvement of BHFM performance.

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“…Scaling is exacerbated by polarization in which heat and mass transfer through the membrane results in an increase in salt concentration and a decrease in temperature along the membrane/feed interface. Recent advances in membrane fabrication have led to the realization of membrane materials that can operate at high salt concentrations [10,12]. We have previously demonstrated the fabrication of hollow fiber membranes (HFMs) that can handle high salinity solutions with a salt concentration near saturation [10].…”

Section: Introductionmentioning

confidence: 99%

Multiphysics Modeling and Analysis of a Solar Desalination Process Based on Vacuum Membrane Distillation

2021

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A hollow fiber vacuum membrane distillation (VMD) module was modeled using finite element analysis, and the results were used to conduct an exergy efficiency analysis for a solar-thermal desalination scheme. The performance of the VMD module was simulated under various operating conditions and membrane parameters. Membrane porosity, tortuosity, pore diameter, thickness, and fiber length were varied, along with feed temperature and feed configuration. In all cases, polarization phenomena were seen to inhibit the performance of the module. Under VMD operation, polarization of salt concentration was seen to be the main determining factor in the reduction of permeate flux. Within the boundary layer, salt concentration was seen to rapidly increase from the feed mass fraction of 0.035 to the saturation point. The increase in salt concentration led to a decrease in saturation pressure, the driving force for separation. Charging the feed into the shell instead of the lumen side of the membranes resulted in a further decrease in permeate flux. It is shown that adding a baffling scheme to the surface of the fibers can effectively reduce polarization phenomena and improve permeate flux. Increasing the overall recovery ratio was seen to increase the exergy efficiency of the system. Exergy efficiency was seen to have almost no dependency on membrane parameters due to the low recovery ratio in a single pass and the high heating duty required to reach the desired temperature for the feed stream.

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The potential of hollow fiber vacuum multi-effect membrane distillation for brine treatment

Cited by 33 publications

References 32 publications

Screening metal-organic frameworks for adsorption-driven osmotic heat engines via grand canonical Monte Carlo simulations and machine learning

Screening metal-organic frameworks for adsorption-driven osmotic heat engines via grand canonical Monte Carlo simulations and machine learning

Effective Parameters on Fabrication and Modification of Braid Hollow Fiber Membranes: A Review

Multiphysics Modeling and Analysis of a Solar Desalination Process Based on Vacuum Membrane Distillation

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