ANU Finds 22,000 Potential Pumped Hydro Sites in Australia

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ANU Finds 22,000 Potential Pumped Hydro Sites in Australia

The Australian National University (ANU) has completed an audit of 22,000 potential sites across Australia for pumped hydro energy storage, which can be used to support a secure and cheap national electricity grid with 100 per cent renewable energy.

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Potential STORES sites in Australia. Credit: ANU

The zero-emissions grid would mainly rely on wind and solar photovoltaic (PV) technology, with support from pumped hydro storage, and would eliminate Australia's need for coal and gas-fired power.

Lead researcher Professor Andrew Blakers said the short-term off-river pumped hydro energy storage (STORES) sites combined had a potential storage capacity of 67,000 Gigawatt-hours (GWh) - much more than the capacity required for a zero-emissions grid.

"Australia needs only a tiny fraction of these sites for pumped hydro storage - about 450 GWh of storage - to support a 100 per cent renewable electricity system," said Professor Blakers from the ANU Research School of Engineering.

"Fast tracking the development of a few of the best sites by 2022 could balance the grid when Liddell and other coal power stations close.

"Pumped hydro storage, including Snowy 2.0, can be developed fast enough to balance the grid with any quantity of variable wind and solar PV power generation, including 100 per cent renewable energy.

"We found so many good potential sites that only the best 0.1 per cent will be needed. We can afford to be choosy."

The Australian Renewable Energy Agency (ARENA) provided $449,000 to support the ANU-led study.

Maps showing the locations of potential STORE sites and a report on the findings are available at . The number of potential sites found in each state and territory is shown in the table below.

STORES sites require pairs of reservoirs at different altitudes, typically ranging from 10 hectares to 100 hectares, in hilly terrain and joined by a pipe with a pump and turbine. Water is pumped uphill when wind and solar energy is plentiful, and electricity is available on demand by releasing the stored water through a turbine.

Read full article: ANU

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