Modelling and dynamic simulation of a large MSF plant using local phase equilibrium and simultaneous mass, momentum, and energy solver

Jari Lappalainen (Corresponding Author), Timo Korvola, Ville Alopaeus

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)


Seawater desalination is an important method for producing fresh water, a critical resource in many areas of the globe. Multi-stage flash distillation (MSF) is a leading technology within the thermal desalination field. Mathematical modelling and simulation provides a means to enhance engineering and operation of complicated production plants. This paper presents a new method for one-dimensional modelling and dynamic simulation of thermal desalination processes. The approach combines the simultaneous mass, momentum, and energy solution, local phase equilibrium by Rachford-Rice equation, and rigorous calculation of the seawater properties as function of temperature, pressure and salinity. A brine recycling MSF plant was modelled as a case study, presenting advanced and unpublished simulated features and transients. The successful results suggest that the method presented is a competent approach for dynamic simulation of thermal desalination processes.
Original languageEnglish
Pages (from-to)242-258
Number of pages17
JournalComputers and Chemical Engineering
Publication statusPublished - 2017
MoE publication typeA1 Journal article-refereed



  • seawater
  • desalination
  • multistage flashing
  • modelling
  • dynamic simulation

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