Feasibility study of a new two-stage low temperature desalination process

Veera Gnaneswar Gude, Nagamany Nirmalakhandan, Shuguang Deng, Anand Maganti

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


This paper presents the preliminary field test data of a two-stage low temperature phase-change desalination process. The process under development operates at low temperatures and low pressures generated by local barometric head. A two-stage configuration of this process was developed and tested at a field site in the Puget Sound bay area of the State of Washington. The field test results proved that the two-stage desalination process has potential for standalone small to large scale applications in water and energy scarce rural areas with specific energy consumption of 1500 kJ/kg of freshwater. Economical analysis conducted on the desalination system results in desalination costs around $3/m 3 using a cheap waste heat source purchased at $0.5/GJ. Since, most small scale domestic desalination systems are designed in combination with a renewable energy source; when this desalination system is powered by a low grade flat plate solar collector heat source, the desalination costs are less than $7/m 3 which falls in acceptable range for small scale desalination systems of similar capacity.

Original languageEnglish (US)
Pages (from-to)192-198
Number of pages7
JournalEnergy Conversion and Management
StatePublished - Apr 2012
Externally publishedYes


  • Energy recovery
  • Low grade heat source
  • Low temperature desalination
  • Multi-stage operation
  • Solar collectors
  • Waste heat

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology


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