Modeling of air-gap membrane distillation process: A theoretical and experimental study
By A. Alsaadi, N. Ghaffour, Jun-de Li, Stephen R. Gray, Lijo Francis, H. Maab, Gary Amy. 2013
219 citations recorded by the source corpus.
A one dimensional (1-D) air gap membrane distillation (AGMD) model for flat sheet type modules has been developed. This model is based on mathematical equations that describe the heat and mass transfer mechanisms of a single-stage AGMD process. It can simulate AGMD modules in both co-current and counter-current flow regimes. The theoretical model was validated using AGMD experimental data obtained under different operating conditions and parameters. The predicted water vapor flux was compared to the flux measured at five different feed water temperatures, two different feed water salinities, three different air gap widths and two MD membranes with different average pore sizes. This comparison showed that the model flux predictions are strongly correlated with the experimental data, with model predictions being within +10% of the experimentally determined values. The model was then used to study and analyze the parameters that have significant effect on scaling-up the AGMD process such as the effect of increasing the membrane length, and feed and coolant flow rates. The model was also used to analyze the maximum thermal efficiency of the AGMD process by tracing changes in water production rate and the heat input to the process along the membrane length. This was used to understand the gain in both process production and thermal efficiency for different membrane surface areas and the resultant increases in process capital and water unit cost.
Subfields: Automotive Engineering, Biomedical Engineering, Water Science and Technology
View Paper: https://www.semanticscholar.org/paper/4de9125de4947df151232f84d52e294e0076d98f
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In Biomedical Engineering
In Water Science and Technology
Citations in the corpus
- Material gap membrane distillation: A new design for water vapor flux enhancement (2013, unknown): “Moreover, the increase is not significant due to the decrease of the residence time at higher cross-flow velocities [34].”
- Effect of operating parameters and membrane characteristics on air gap membrane distillation performance for the treatment of highly saline water (2016, background): “Interest in AGMD, VMD and SGMD has been increasing in recent years [20-40].”
- Heat and Mass Transport in Modeling Membrane Distillation Configurations: A Review (2018, background): “…between membrane and cooling plate, in LGMD as shown in Figure 5, the gap between membrane and condensing surface in permeate side of the module is filled with distilled water, which acts as stagnant cold liquid solution inside membrane module (Ugrozov and Kataeva, 2004; Amaya-Vías et al., 2018).”