A novel process for low grade heat driven desalination

Bijan Rahimi, A. Christ, Klaus Regenauer-Lieb, Hui Chua

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


Low grade process heat and geothermal energy with temperatures typically below 100. °C are significant untapped environmentally friendly resources for desalination. This article reports on a novel multi-effect distillation (MED) desalination process that is boosted by a multi-stage flashing process. Specifically the low grade heat first heats up the multi-effect distillation plant and is then maximally exploited through a multi-stage flashing process, with the produced steam of which being judiciously introduced into the multi-effect distillation plant for enhanced freshwater production. Compared with optimized conventional MED processes, the performance improvement is up to around 50% better in terms of freshwater production, with a modest increase in the pumping power consumption and 4% to 6% decrease in the specific capital cost. © 2014 Elsevier B.V.
Original languageEnglish
Pages (from-to)202-212
Publication statusPublished - 2014


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