Advanced Compressed
Air Energy Storage
Using a simple combination of air, water, and underground hard rock caverns, our patented A-CAES technology allows grid operators and large energy users to draw on stored energy when the grid needs it.
Compress air using electricity
Off-peak or surplus electricity from the grid is used to run a compressor, producing heated compressed air.
Capture heat in above ground thermal storage
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 a heat source during discharge.
Store compressed air in hard rock caverns
The cool compressed air is then stored in a purpose-built underground hard rock cavern which uses a water head to enhance land density and maintain the system at a constant pressure.
Convert compressed air to electricity on demand
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.
A-CAES Benefits
Low cost, long life
- Low installed cost per kWh for large-scale, long-duration energy storage (100+ MW)
- 50+ year lifetime
- Low operating costs, and increased efficiency over existing CAES systems
Emissions-free operation
- Heat is extracted from the air and stored for later use
- This increases process efficiency and eliminates the need to use a heat source to generate electricity during discharge
Flexibly sited
- Proprietary purpose-built hard-rock caverns allow for flexible project siting
- No need for salt caverns, like traditional CAES or pumped hydro
Proven equipment and supply chain
- Established mechanical equipment from leading suppliers, like Baker Hughes, is matched with seasoned engineering expertise, system warranty, and delivery guarantees
Customized systems design
- Highly scalable system design to match client requirements, with independent settings for charge, discharge, and storage capacity
- Ability to provide incremental capacity (MWs) and duration (MWh) in the future on a cost-effective basis with limited downtime as system needs change over time
Ancillary services
- Synchronous motors and generators provide rotational inertia supporting existing operators know how to support grid stability
- Full suite of ancillary services available including voltage support, spinning reserve, black start, and frequency response
Get in Touch
Toronto Office (Global Headquarters)
333 Bay Street, Suite 520
Toronto Ontario M5H2R2
Canada
(416) 548-7880
Denver Office (US Headquarters)
1125 17th Street, Suite 700
Denver, Colorado 80202
USA
Melbourne Office (Australia Headquarters)
Level 10, 420 St.Kilda Road
Melbourne, Victoria 3004
Australia
Adelaide Office
Tenancy 8/6 MAB Eastern Prom
Tonsley SA 5042
Australia