Australia's Kidston Renewable Energy Hub is repurposing a former gold mine in Far North Queensland into a pumped-hydro energy storage facility. The K2-Hydro project will use two disused mine pits as upper and lower reservoirs, with a planned capacity of 250 MW and 2,000 MWh of storage, providing approximately eight hours of energy storage. According to the Australian Renewable Energy Agency, the facility is designed to store electricity and release it when demand is high, with a start-up time expected to be less than 30 seconds. The project will also reuse existing mining infrastructure and connect the renewable energy hub to the national grid through a transmission line. By converting the abandoned mine site, the project aims to support renewable power generation while making use of infrastructure already available at Kidston. The stored electricity can help balance variable solar and wind generation and provide additional reliability during periods of peak demand.
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