Integrating concentrated solar power with seawater desalination technologies: A multi-regional environmental assessment

Mohamed Alhaj, Sami G. Al-Ghamdi

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Using renewable energy to power seawater desalination technologies can reduce the environmental impacts of a process which is essential for global water security. However, the uneven geospatial distribution of renewable energy resources and regions of water scarcity results in unequal environmental benefits which creates uncertainty for global policy making. Hence, this study explores the relation between renewable energy resources, freshwater demand, and associated environmental impacts of desalination plants driven by renewable energy at a global scale using a comparative life-cycle assessment approach. We focus on an optimized solar-driven thermal desalination plant that we developed which can be used in seawater and brackish water treatment. By examining the life-cycle impact of the proposed plant in seven water-stressed cities, we found that the mean value for CO2 emissions is 4.32 kg CO2 eq./m3 of desalted water which is 47% lower than conventional thermal desalination. There is a variation by as much as 80% and 95% in the climate change and water depletion, categories respectively across the selected cities. The multi-city analysis provides energy and water utilities, CSP project developers, and environmental authorities a global assessment of the environmental impact of solar desalination and sheds light on the correlation between solar intensity and seawater conditions on the overall environmental impact of this technology.
Original languageEnglish (US)
JournalEnvironmental Research Letters
Volume14
Issue number7
DOIs
StatePublished - Jul 9 2019
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-02-14

ASJC Scopus subject areas

  • General Environmental Science
  • Public Health, Environmental and Occupational Health
  • Renewable Energy, Sustainability and the Environment

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