Productivity and Thermal Performance Enhancements of Hollow Fiber Water Gap Membrane Distillation Modules Using Helical Fiber Configuration: 3D Computational Fluid Dynamics Modeling

Although hollow fiber water gap membrane distillation (HF-WGMD) units offer certain advantages over other MD desalination systems, they still require enhancements in terms of distillate flux and productivity. Therefore, this work proposes a novel configuration by incorporating the helical turns of H...

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Vydané v:Membranes (Basel) Ročník 13; číslo 10; s. 843
Hlavní autori: Elbessomy, Mohamed O., Elsheniti, Mahmoud B., Elsherbiny, Samy M., Rezk, Ahmed, Elsamni, Osama A.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Basel MDPI AG 01.10.2023
MDPI
Predmet:
Aquatic resources
Cold
compact design
Comparative analysis
Computational fluid dynamics
Configurations
Desalination
Distillates
Distillation
Distilled water
Double-stranded
Energy conservation
Energy consumption
Energy efficiency
Fluid dynamics
Force and energy
Heat transfer
hollow fiber MD
Hydrodynamics
Mathematical models
membrane distillation
Membranes
Modules
Productivity
Saline water
Saline water conversion
Salinity
Temperature
thermal desalination
Thermal energy
Three dimensional models
Transport phenomena
Water gaps
ISSN:2077-0375, 2077-0375
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Popis
Shrnutí:Although hollow fiber water gap membrane distillation (HF-WGMD) units offer certain advantages over other MD desalination systems, they still require enhancements in terms of distillate flux and productivity. Therefore, this work proposes a novel configuration by incorporating the helical turns of HF membranes within the water gap channel of the HF-WGMD modules. A fully coupled 3D CFD model is developed and validated to simulate the multifaceted energy conservations and diffusion mechanisms that are inherent to the transport phenomena in the proposed HF-WGMD module. Single and double helical HF membrane designs with different numbers of turns are compared to the reference modules of single and double straight HF membrane designs under various operational conditions. At a feed temperature of 70 °C, a noteworthy 11.4% enhancement in the distillate flux is observed when employing 20 helical turns, compared to the single straight HF membrane module. Furthermore, the specific productivity revealed a maximum enhancement of 46.2% when using 50 helical turns. The thermal performance of the proposed HF-WGMD module shows higher energy savings of up to 35% in specific thermal energy consumption for a one-stage module. Using three stages of single helical modules can increase the gain output ratio from 0.17 for the single stage to 0.37, which represents an increase of 117.6%. These findings indicate the high potential of the proposed approach in advancing the performance of HF-WGMD systems.
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ISSN:2077-0375
2077-0375
DOI:10.3390/membranes13100843