Numerical simulation of membrane desalination in a conjugated heat transfer configuration: Role of spacers

Isam Janajreh, Raed Hashaikeh, Dana Suwwan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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 membrane polyvinylidene fluoride (PVDF) in conjugate heat transfer formulation. Depending on the membrane properties (permeability, thickness, pour size, conductivity, etc.) a temperature, and therefore, a pressure gradient across the membrane is created leading to vaporizing, transporting, and condensing the feed at the permeate side. This work investigates the influence of the spacers in modifying the thermal and kinetic boundary layers, i.e. adjustment of surface temperature, heat flux, and shear stress. The DCMD membrane mass transfer coefficient is evaluated additional to the temperature polarization factor (TPF) and thermal efficiency. Results showed a significant change in Temperature, Nusselts number, and surface shear stresses when spacers are introduced as the boundary layer became fully turbulent which enhanced the mass and heat flux but to a smaller extent.

Original languageEnglish (US)
Title of host publicationProceedings of 2014 International Renewable and Sustainable Energy Conference, IRSEC 2014
EditorsMohamed Essaaidi, Youssef Zaz
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages941-947
Number of pages7
ISBN (Electronic)9781479973361
DOIs
StatePublished - Mar 12 2014
Event2014 2nd International Renewable and Sustainable Energy Conference, IRSEC 2014 - Ouarzazate, Morocco
Duration: Oct 17 2014Oct 19 2014

Publication series

NameProceedings of 2014 International Renewable and Sustainable Energy Conference, IRSEC 2014

Conference

Conference2014 2nd International Renewable and Sustainable Energy Conference, IRSEC 2014
CountryMorocco
CityOuarzazate
Period10/17/1410/19/14

Keywords

  • Heat Transfer
  • Mass Transfer
  • Membrane Distillation
  • Membrane Spacer
  • Temperature Polarization

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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