Our patented A-CAES technology allows grid operators to draw on clean energy, even when there is no sun to fuel solar panels and no wind to generate energy from turbines
Off-peak or surplus electricity from the grid or a renewable source is used to run a compressor, producing heated compressed air.
Heat is extracted from the air and stored in a proprietary thermal storage tank preserving for use later in the process. Saving the heat increases efficiency and eliminates the need to use fossil fuels during discharge.
The cool compressed air is then stored in a purpose-built underground rock cavern which uses a water head to use enhance land use density and maintain the system at a constant pressure.
When energy is needed, the water head weight is released and with the help of gravity, air is pushed to the surface where it is recombined with the stored heat and expanded through a turbine to generate electricity on demand.
Entirely fuel-free, the plant produces zero greenhouse gas emissions, and helps enable a cleaner, more affordable, and more flexible electricity grid.
With 1.75 megawatts (MW) of peak power output; a 2.2 MW charge rating; and 10+ megawatt-hours (MWh) of storage capacity, this utility-scale commercial application of A-CAES technology is a significant achievement, conforming to all interconnection, uptime, performance and dispatch standards as set out by the IESO.
Hydrostor’s Goderich energy storage facility proves out the ability of Hydrostor’s A-CAES technology to fully participate in and deliver a range of valuable grid services to electricity markets.
Contributing to deeper understanding of commercial A-CAES facilities at utility scale, corroborating performance and operational metrics, and supporting research in partnership with regional academic institutions.
Facility is fuel free, enabling the province to utilize surplus baseload electricity as a fuel source to provide cost-effective and valuable generating capacity for Ontario.
Supporting economic diversification in cleantech alongside significant construction expenditures and related jobs within the community.