Hydrostor’s A-CAES a ‘game changer’ for Silver City project

Rendered image of Hydrostor A-CAES energy storage facility (Goldman Sachs)
Image: Hydrostor

Long duration energy storage (LDES) developer and operator Hydrostor and mining developer and operator Perilya will leverage the existing mining assets at Perilya’s Potosi Mine in Broken Hill to support the construction of the Silver City Energy Storage (SCES) Project.

Perilya Broken Hill Limited and Hydrostor have been working together since 2020 to evaluate the potential of a large-scale long duration energy storage project adjacent to the Potosi Mine northeast of Broken Hill, NSW, which will continue to operate as normal.

Related article: Hydrostor the preferred backup for Broken Hill mini-grid

The Silver City Project uses Hydrostor’s Advanced Compressed Air Energy Storage (A-CAES) technology and will leverage several unique features of the Perilya Potosi Mine Site, including:

  • Very hard and impermeable metamorphic rock at the mine site
  • Existing underground mine development, providing access to construct the underground cavern at optimal depth of approximately 600m below ground
  • Existing mine support infrastructure, facilitating the construction of the project.

The agreement includes access to property transactions and existing mine infrastructure, provision of construction support services, and supports the continued and longer-term operation of the Potosi Mine during and after the Project is being constructed.

Hydrostor vice president of integration Paul Rasmussen said, “By leveraging the existing mine investment and infrastructure, this partnership enables us to improve project delivery timeframe, since we can build the underground air storage cavern much faster, with reduced setup costs and a better understanding of the geology at site.”

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The SCES Project has been selected by Transgrid as the preferred solution to provide backup power for Broken Hill and the Far West region of NSW. The Project will provide reliable backup power for both the town and existing or new mining activities in the region.

The project is supported by the NSW Government under the Emerging Energy Program and by the Federal Government via a grant from the Australian Renewable Energy Agency (ARENA).

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