Experimental and theoretical analyses of temperature polarization effect in vacuum membrane distillation

Ahmad S. Alsaadi, Lijo Francis, Gary L. Amy, Noreddine Ghaffour

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

This paper discusses the effect of temperature polarization in Vacuum Membrane Distillation (VMD). The main motivation for using VMD in this work is that this module configuration is much simpler and more suitable for this kind of investigation than the other MD configurations such as Direct Contact Membrane Distillation (DCMD). The coupling between heat and mass transfer mechanisms at the feed-membrane interface is presented from a theoretical point of view. In addition, a new simple graphical method and a mathematical model for determining VMD flux are presented. The two methods used in evaluating the extent of temperature polarization effect on water vapor flux (flux sensitivity factors and temperature polarization coefficient (TPC)) are also analyzed and compared. The effect of integrating a heat recovery system in a large scale module on the TPC coefficient has also been studied and presented in this paper.

Original languageEnglish
Pages (from-to)138-148
Number of pages11
JournalJournal of Membrane Science
Volume471
DOIs
Publication statusPublished - 1 Dec 2014

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Keywords

  • Flux sensitivity factor
  • Heat transfer
  • Mass transfer coefficient
  • Temperature polarization
  • Vacuum membrane distillation (VMD)

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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