Hydrostor Angas A-CAES Project

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The Hydrostor Angas A-CAES Project is Australia’s first Advanced Compressed Air Energy Storage (A-CAES) facility.Electricity from the 5 MW, 10 MWh emission-free plant will be dispatched into the National Electricity Market (NEM) to provide flexible capacity and synchronous inertia. This will support grid security and reliability, while enabling the integration of Variable Energy Resources (VERs)such as solar and wind. Successful deployment of the Angas A-CAES Project may open up opportunities throughout Australia for the build-out of full-scale (50+ MW), long-duration (4-24+ hours), long-life (50+ years) projects, adding clean energy capacity and boosting reliability of power supplies across the NEM.How the project worksThe Hydrostor Angas A-CAES Project uses electricity to run a compressor, producing heated compressed air. Heat is extracted from the air and kept inside a thermal store, preserving the energy for later use. Compressed air is stored in an underground cavern, which is kept at constant pressure. On charge, compressed air displaces water out of the cavern up a water column to a surface reservoir. On discharge, water flows back into the cavern forcing air to the surface where it is re-heated using the stored heat and expanded through a turbine to generate electricity.

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