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Membrane Water Treatment
  Volume 11, Number 5, September 2020, pages 353-361
DOI: http://dx.doi.org/10.12989/sem.2020.11.5.353
 


Numerical study of desalination by Sweeping Gas Membrane Distillation
Nizar Loussif and Jamel Orfi

 
Abstract
    The present study deals with a numerical investigation of heat and mass transfer in a Sweeping Gas Membrane Distillation (SGMD) used for desalination. The governing equations expressing the conservation of mass, momentum, energy and species with coupled boundary conditions were solved numerically. The slip boundary condition applied on the feed saline solution-hydrophobic membrane interface is taken into consideration showing its effects on profiles and process parameters.The numerical model was validated with available experimental data and was found to be in good agreement particularly when the slip condition is considered. The results of the simulations highlighted the effect of slip boundary condition on the velocity and temperature distributions as well as the process effectiveness. They showed in particular that as the slip length increases, the permeate flux of fresh water and process thermal efficiency rise.
 
Key Words
    membrane distillation, desalination, heat and mass transfer, slip flow, SGMD
 
Address
Nizar Loussif: 1 École Nationale d'Ingénieurs de Monastir, Université de Monastir, Monastir, Tunisie
2 Département Génie des Procédés, Institut Supérieur des Etudes Technologiques Ksar Hellal, Tunisie
Jamel Orfi: 3 Mechanical Engineering Department, King Saud University, Riyadh, KSA
4 KA.CARE Energy Research and Innovation Center at Riyadh, Saudi Arabia
 

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