Performance Analysis, Mathematical Modeling and Economic Assessment of Developed Vacuum Membrane Distillation System for Water Desalination

2020 ◽  
Vol 1 (1) ◽  
pp. 43-58
Keyword(s):  
Mathematical Modeling ◽  
Performance Analysis ◽  
Economic Assessment ◽  
Membrane Distillation ◽  
Water Desalination ◽  
Distillation System ◽  
Vacuum Membrane Distillation

scholarly journals Performance Investigation of O-Ring Vacuum Membrane Distillation Module for Water Desalination

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Adnan Alhathal Alanezi ◽  
H. Abdallah ◽  
E. El-Zanati ◽  
Adnan Ahmad ◽  
Adel O. Sharif
Keyword(s):  
Flow Rate ◽  
Membrane Distillation ◽  
Membrane Module ◽  
Water Desalination ◽  
Feed Flow Rate ◽  
Permeate Flux ◽  
Vacuum Degree ◽  
Flat Sheet ◽  
Vacuum Membrane Distillation ◽  
Feed Temperature

A new O-ring flat sheet membrane module design was used to investigate the performance of Vacuum Membrane Distillation (VMD) for water desalination using two commercial polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF) flat sheet hydrophobic membranes. The design of the membrane module proved its applicability for achieving a high heat transfer coefficient of the order of 103 (W/m2 K) and a high Reynolds number (Re). VMD experiments were conducted to measure the heat and mass transfer coefficients within the membrane module. The effects of the process parameters, such as the feed temperature, feed flow rate, vacuum degree, and feed concentration, on the permeate flux have been investigated. The feed temperature, feed flow rate, and vacuum degree play an important role in enhancing the performance of the VMD process; therefore, optimizing all of these parameters is the best way to achieve a high permeate flux. The PTFE membrane showed better performance than the PVDF membrane in VMD desalination. The obtained water flux is relatively high compared to that reported in the literature, reaching 43.8 and 52.6 (kg/m2 h) for PVDF and PTFE, respectively. The salt rejection of NaCl was higher than 99% for both membranes.

Solar-heated submerged vacuum membrane distillation system with agitation techniques for desalination

2021 ◽  
Vol 256 ◽  
pp. 117855 ◽  
Author(s):  
Ahmad Bamasag ◽  
Talal Alqahtani ◽  
Shahnawaz Sinha ◽  
Noreddine Ghaffour ◽  
Patrick Phelan
Keyword(s):  
Membrane Distillation ◽  
Distillation System ◽  
Vacuum Membrane Distillation

scholarly journals An Experimental and Theoretical Study on Separations by Vacuum Membrane Distillation Employing Hollow-Fiber Modules

Water ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 947 ◽  
Author(s):  
Anthoula Karanasiou ◽  
Margaritis Kostoglou ◽  
Anastasios Karabelas
Keyword(s):  
Process Model ◽  
Flow Direction ◽  
Membrane Distillation ◽  
Water Desalination ◽  
Solution Temperature ◽  
Feed Water ◽  
System Productivity ◽  
Capillary Membrane ◽  
Vacuum Membrane Distillation ◽  
By Products

Vacuum membrane distillation (VMD) is an attractive variant of the novel membrane distillation process, which is promising for various separations, including water desalination and bioethanol recovery through fermentation of agro-industrial by-products. This publication is part of an effort to develop a capillary membrane module for various applications, as well as a model that would facilitate VMD process design. Experiments were conducted in a laboratory pilot VMD unit, comprising polypropylene capillary-membrane modules. Performance data, collected at modest temperatures (37 °C to 65 °C) with deionized and brackish water, confirmed the improved system productivity with increasing feed-water temperature; excellent salt rejection was obtained. The recovery of ethanol from ethanol-water mixtures and from fermented winery by-products was also studied, in continuous, semi-continuous, and batch operating modes. At low-feed-solution temperature (27–47 °C), ethanol-solution was concentrated 4 to 6.5 times in continuous operation and 2 to 3 times in the semi-continuous mode. Taking advantage of the small property variation in the module axial-flow direction, a simple VMD process model was developed, satisfactorily describing the experimental data. This VMD model appears to be promising for practical applications, and warrants further R&D work.

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