Technical comparison between TVC/MEB and MSF

M. A. Darwish, Ammar Alsairafi

Research output: Contribution to journalArticle

37 Citations (Scopus)


Recently, large numbers of high capacity TVC/MEB (multi-effect thermal vapor compression combined withconventinalmulti effect boiling) desalting units have been built or ordered in the UAE and elsewhere. An in-depth comparison between the predominantly used MSF and the TVC/MEB is conducted in this paper to show the reasons of this trend to used the newly used TVC/MEB units. The TVC/MEB units operate at lower top brine temperature TBT to limit the risk of scale formation and corrosion. This decreases the difference between TBT and last effect (stage) temperature Tn, and this tends toincrease the heat transfer surface area of the TVC/MEB compared to the MSF system. However, the high heat transfer rates in film boiling in TVC/MEB evaporators keep the heat transfer area the same in both systems. Moreover, the TVC/MEB system has more merits copared to the MSF such as: it has better response to the variation of steam supply, less footprint area, less pumping energy, and the ability to operate at different modes than the design.

Original languageEnglish
Pages (from-to)223-239
Number of pages17
Issue number3
Publication statusPublished - 5 Nov 2004



  • Brine salinity
  • Equivalent work
  • Falling film evaporators
  • Feed salinity
  • Gain ratio
  • Multi-effect
  • Multi-stage flash desalting systems
  • Performance ratio
  • Pumping energy
  • Thermal vapor compression
  • Top brine temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

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