Optimization of multi-effect distillation process using a linear enthalpy model

Kerron J. Gabriel, Patrick Linke, Mahmoud M. El-Halwagi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

This paper presents a novel mathematical formulation for modeling-based optimization of the multiple effect distillation (MED) water desalination process using thermal vapor compression (TVC). The presented model is based on a mass flowrate decoupling concept where flowrates of salt and water in the process are separately considered to allow for the development of a linear programming (LP) optimization formulation while accounting for process heat and mass balances. The system models include stream physical properties that are dependent on temperature, salinity, thermodynamic losses and other properties that are influenced by changes in system pressure such as brine and distillate flashing. The overall modeling approach was used to perform a thermo-economic analysis of the process as well as to identify novel flow routing options for boiler feed water return and de-superheating water sources. A sensitivity analysis was performed to evaluate the effects of various system parameters such as motive steam supply pressure, heating costs, seawater salinity and number of operating effects on the thermo-economically optimal design.

Original languageEnglish
Pages (from-to)261-276
Number of pages16
JournalDesalination
Volume365
DOIs
Publication statusPublished - 1 Jun 2015

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Keywords

  • Multiple effect distillation
  • Optimization
  • Seawater desalination
  • Thermal vapor compression

ASJC Scopus subject areas

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

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