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Patent drawing for Utility scale osmotic grid storage
US 8,795,525 B2
Filtration US 8,795,525 B2 Expired

Utility scale osmotic grid storage

This invention describes a system for storing and generating electricity using salt solutions. It works by first using electrical or thermal energy to separate a dilute salt solution. This separated solution then flows through a membrane system, which in turn operates an electrochemical generator to produce electricity for an electrical grid.

Why it matters: Advances in membrane technology and electrochemical cells since 2009 could significantly improve the efficiency of the energy-intensive salt separation and subsequent power generation. This makes the system more viable for grid-scale energy applications.

Status
ExpiredProtection ended and was never renewed
How hard to build
SpecializedSpecialized membranes, electrochemical cells, power electronics

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