Membrane distillation (MD) is a thermally driven separational program in which separation is enabled due to phase change. A hydrophobic membrane displays a barrier for the liquid phase, allowing the vapour phase (e.g. water vapour) to pass through the membrane's pores. The driving force of the process is given by a partial vapour pressure difference commonly triggered by a temperature difference.In air-gap MD, the evaporator channel resembles that in DCMD, whereas the permeate gap lies between the membrane and a cooled walling and is filled with air. The vapor passing through the membrane must additionally overcome this air gap before condensing on the cooler surface. The advantage of this method is the high thermal insulation towards the condenser channel, thus minimizing heat conduction losses. User has to assign the system productivity in order to get all design aspects such areas, number of pores, efficiency, fulx, mass transfer, GOR, Exergy, Cost, etc...

 

**MatLab-SimuLink should be used to run the model.


Copyright © 2007 by Mohamed A. Sharaf Eldean Ayoub

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Air Gap Membrane Distillation

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