article · Applied Water Science
Sweeping gas membrane distillation provides a method for desalinating brackish or saline water containing non-volatile compounds such as salts. Although this setup is the least used membrane distillation configuration because its design is arduous and very expensive, it achieves complete salt rejection to yield high-purity water. Thermally induced vapour transfer drives the evaporation and condensation processes across the membrane. A simulation of the system using MATLAB examined the underlying heat and mass transfer characteristics. The investigation revealed that heat and mass transfer within the system are governed by the evaporation temperature of the gas and the sweeping gas rate. Additionally, fluid velocity across the boundary layers on both sides of the membrane acts as a primary operational parameter driving heat and mass movement.
Desalination technologies are essential for producing clean water from saline and brackish resources. Sweeping gas membrane distillation offers total salt rejection, but its adoption has been limited by high costs and complex design. Clarifying how operational factors such as gas temperatures, sweep rates, and fluid velocities govern heat and mass transfer provides a foundation for refining and improving the efficiency of these systems.
The primary application is the desalination of brackish and saline water for industrial or municipal water treatment. Because the work focuses on MATLAB simulation of heat and mass transfer parameters, and explicitly identifies current system designs as arduous and very expensive, this technology is at an early research stage and remains distant from commercialisation or market-ready implementation.
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Abstract The paper presents the focuses of application in membrane processes for the desalination of brackish water or salt water using the sweeping gas membrane distillation (SGMD); at first, it is the least used configuration of MD, and the design of this system is arduous and very expensive, and it is used to treat solutions containing non-volatile compounds, such us salts which is totally rejected, and high purity of water was recuperated. Vapor transfer is an important thermally induced phenomenon in the membrane-by-membrane (MD) evaporation and condensation. Our SGMD distillation system was simulated using MATLAB programmers on heat and mass transfer aspects. In our research, we found that heat and mass transfer in the SGMD is determined by the evaporation temperature of the gas and the sweep rate. The operational parameter (fluid velocity) is influenced across the layer on both sides of the membrane, because it is the source of the transfer of heat and mass in many membrane processes.
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DOI: 10.1007/s13201-020-01194-3
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