Water Production and Energy Storage by Salinity Gradient

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Researchers at Purdue University have created a grid-scale salinity gradient for water production and energy storage. Desalination is the most energy intensive and costly step in the entire water production process, and there remains a need to create the supply necessary to meet the world's demand for drinking water. Currently, water systems operate at constant power, which is often wasteful and inefficient. Most facilities are not adapted for price fluctuations or seasonal changes as a result. By implementing new configurations for reverse osmosis in water management facilities, Purdue researchers were able to control water supply based on load. This approach, by splitting the recovery ratio of the feed into steps, can make RO both demand response capable and more energy efficient. In addition, this economical, reliable, and environmentally friendly solution is not limited by geographical or elevation constraints, unlike conventional plants.


Potential Applications
-Water Production
-Energy Storage
-Renewable Energy
Mar 28, 2022
United States

Sep 30, 2020

Oct 1, 2019
United States
Purdue Office of Technology Commercialization
The Convergence Center
101 Foundry Drive, Suite 2500
West Lafayette, IN 47906

Phone: (765) 588-3475
Fax: (765) 463-3486
Email: otcip@prf.org