Persian Gulf desalination using air gap membrane distillation: Numerical simulation and theoretical study

Asghari, Morteza; Harandizadeh, Amir; Dehghani, Mostafa; Harami, Hossein Riasat

doi:10.1016/j.desal.2015.07.019

Cited by 36 publications

(6 citation statements)

References 40 publications

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“…A hydrophobic membrane can be used to allow only the vapour to transfer, preventing passage of solutes. Air gap membrane distillation, which is one of four membrane distillation configurations (which also includes direct contact membrane distillation, vacuum membrane distillation, sweep gap membrane distillation), is based on using an air gap on the permeate side to reduce the heat lost by conduction and temperature polarization, increasing the effectiveness of the separation method [1]. In terms of AGMD, desalination is considered to be one of the major applications for producing high quality water, particularly from sea water [2,3].…”

Section: Introductionmentioning

confidence: 99%

Modelling of air gap membrane distillation and its application in heavy metals removal

et al. 2017

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In the present study, theoretical and experimental investigations were carried out to examine the effect of changing the operating parameters of an air gap membrane distillation (AGMD) system on the performance of electrospun and commercial membranes. These parameters include feed, cooling water temperature and feed flow rate. Analytical models were used, with the aid of MATLAB, to predict the permeate flux of AGMD based on heat and mass transfer. Heat transfer was used to predict the temperature on the membrane surface on the feed side and the thin film layer in the cooling plate on the air gap side, which was used later to calculate the vapour pressure and the permeate flux. The molecular diffusion model corresponded well with the experimental measurements in terms of predicting the permeate flux by varying the feed temperature, whilst it was poor in term of coolant temperature and feed flow rate. The results also illustrate that high rejection rates of around 99% of heavy metals can be achieved by using superhydrophobic electrospun membranes. The electrospun membrane flux increased with increasing feed tank temperature and flow rate while it was reduced with an increase of cooling line temperature.

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Section: Introductionmentioning

confidence: 99%

Modelling of air gap membrane distillation and its application in heavy metals removal

et al. 2017

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“…As shown in Figure 7, in VA-AGMD, vacuum pressure is introduced to the air gap section to bring air gap pressure of cold feed stream below saturation pressure for removal of non-condensable gases (air) (Liu Z. et al, 2017). Studies conducted by Liu Z. et al (2017), Alsaadi et al (2015), and Asghari et al (2015) have shown that permeate flux increases as a result of a decrease in air gap pressure, and this increases the removal rate of entrapped air that diffused with water vapor across hydrophobic membrane. It has been suggested that VA-AGMD is more efficient than basic MD configurations, such as AGMD, VMD, SGMD, and DCMD, in terms of high latent heat and water recovery rates (Prince et al, 2015;Liu Z. et al, 2017).…”

Section: Configurationsmentioning

confidence: 99%

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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“…To achieve better performance the AGMD configuration including an air gap on the outlet side was used in this work. It was commented that air gap can minimize the heat lose by temperature polarization and maximizing the salt rejection [23].…”

Section: Introductionmentioning

confidence: 99%

An integrated fertilizer driven forward osmosis- renewables powered membrane distillation system for brackish water desalination: A combined experimental and theoretical approach

et al. 2019

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Persian Gulf desalination using air gap membrane distillation: Numerical simulation and theoretical study

Cited by 36 publications

References 40 publications

Modelling of air gap membrane distillation and its application in heavy metals removal

Modelling of air gap membrane distillation and its application in heavy metals removal

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

An integrated fertilizer driven forward osmosis- renewables powered membrane distillation system for brackish water desalination: A combined experimental and theoretical approach

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