Sustainable desalination using ocean thermocline energy

Kim Choon Ng*, Muhammad Wakil Shahzad

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

51 Citations (Scopus)


The conventional desalination processes are not only energy intensive but also environment un-friendly. They are operating far from thermodynamic limit, 10–12%, making them un-sustainable for future water supplies. An innovative desalination processes are required to meet future sustainable desalination goal and COP21 goal. In this paper, we proposed a multi-effect desalination system operated with ocean thermocline energy, thermal energy harnessed from seawater temperature gradient. It can exploit low temperature differential between surface hot water temperature and deep-sea cold-water temperature to produce fresh water. Detailed theoretical model was developed and simulation was conducted in FORTRAN using international mathematical and statistical library (IMSL). We presented four different cases with deep-sea cold water temperature varies from 5 to 13 °C and MED stages varies from 3 to 6. It shows that the proposed cycle can achieve highest level of universal performance ratio, UPR = 158, achieving about 18.8% of the ideal limit. With the major energy input emanated from the renewable solar, the proposed cycle is truly a “green desalination” method of low global warming potential (GWP), best suited for tropical coastal shores having bathymetry depths up to 300 m or more.

Original languageEnglish
Pages (from-to)240-246
Number of pages7
JournalRenewable and Sustainable Energy Reviews
Early online date22 Sept 2017
Publication statusPublished - 1 Feb 2018
Externally publishedYes


Dive into the research topics of 'Sustainable desalination using ocean thermocline energy'. Together they form a unique fingerprint.

Cite this