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Membrane distillation (MD) is used in desalination, wastewater treatment, and medicinal application. Direct contact (DCMD) and air-gap (AGMD) membrane distillation are the most common configurations. The simplicity and high flux marks the advantages of the former while the low fouling is attributed to the latter. The air-gap integration used between the bottom surface of membrane and the permeate...
Thermal conductivity is one of the most influencing DCMD performance parameters. Having larger value in the membrane results in lower thermal efficiency and mass flux. However, increasing the conductivity of the fluid, membrane’s surfaces, or by means of higher conductive gap have reported unique performance improvements in DCMD. In this work, computational fluid dynamics (CFD) has been used to evaluate...
The performance of the Direct Contact Membrane is assessed via the Computational Fluid Dynamics (CFD) simulation. The developed conjugated heat numerical model from the authors' previous work is used t investigate the role of spacer on the flow and DCMD metrics. The feed (hot stream) and permeate (cold stream) channels are subjected to uniform Navier-Stokes flow and are thermally coupled with a hydrophobic...
Computational Fluid Dynamics (CFD) is used to study the steady state performance of Low Energy Direct Contact Membrane Distillation (DCMD). Two-dimensional numerical model with parallel and counter flow is developed. A case of parabolic flow with characteristic velocity is considered entering the domain from the feed and permeate sides at 40°C and 25°C respectively. The model parameters were measured...
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