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22 Million GWh of Pumped Hydro Energy Storage Potential Identified Worldwide

potentially feasible pumped hydro energy storage sites (Credit: Pumped hydro site data: RE100 Group ANU. Background: Bing Maps) Click to Enlarge.

There are a total of about 530,000 potentially feasible pumped hydro energy storage sites worldwide, with a total storage potential of about 22 million GWh.  These astonishing numbers come from a report recently released by Professor Andrew Blakers and other researchers with Australian National University’s RE100 Group.

Pumped hydro already constitutes 97% of electricity storage worldwide because of its low cost, ANU says, and the proportion of wind and solar photovoltaics in the electrical grid is extending considerably.  This means “additional long-distance high voltage transmission, demand management and local storage is required for stability.”

ANU researchers identified the potential sites and their potential using geographic information system (GIS) analysis.

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