Membrane distillation against a pressure difference

L. Keulen, LV van der Ham, N.J.M. Kuipers, J.H. Hanemaaijer, Thijs Vlugt, S Kjelstrup

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)
21 Downloads (Pure)

Abstract

Membrane distillation is an attractive technology for production of fresh water from seawater. The MemPower®MemPower® concept, studied in this work, uses available heat (86 °C) to produce pressurized water (2.2 bar and 46 °C) by membrane distillation, which again can be used to power a turbine for co-production of electricity. We develop a non-equilibrium thermodynamic model to accurately describe the transfer at the liquid-membrane interfaces, as well as through the hydrophobic membrane. The model can explain the observed mass flux, and shows that 85% of the energy is dissipated at the membrane-permeate interface. It appears that the system's performance will benefit from a lower interface resistance to heat transfer, in particular at the permeate side of the membrane. The nature of the membrane polymer and the pore diameter may play a role in this context.
Original languageEnglish
Pages (from-to)151-162
JournalJournal of Membrane Science
Volume524
DOIs
Publication statusPublished - 2017

Keywords

  • Membrane distillation
  • Water desalination
  • Heat and mass transfer
  • MemPower
  • Irreversible thermodynamics

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