Hydrostor - Model A-CAES - Compressed Air Energy Storage Technology
Hydrostor's proprietary Advanced Compressed Air Energy Storage (A-CAES) technology is the leading low-cost bulk energy storage solution. It addresses intermittent renewable generation (solar, wind), reserve capacity, peak shaving, and transmission and distribution deferral. Hydrostor offers a complete solution including financing and warranty through our strategic EPC partnerships.
Details
Compress Air Using Electricity
Off-peak or surplus electricity from the grid or a renewable source is used to run a compressor and produces heated compressed air.
Capture Heat in Thermal Store
Heat is extracted from the air stream and stored inside a proprietary thermal store preserving the energy for use later in the cycle. This adiabatic process increases overall efficiency and eliminates the need for fossil fuels during operation.
Store Compressed Air
The compressed air is stored in a purpose-built cavern where hydrostatic compensation is used to maintain the system at a constant pressure during operation.
Convert Compressed Air to Electricity On Demand
Hydrostatic pressure forces air to the surface where it is recombined with the stored heat and expanded through a turbine to generate electricity on demand.
Applications
A-CAES specifically targets very high-value grid and customer applications that are not easily accessible by other storage technologies, enabling direct replacement of fossil generation, deferral of costly transmission investments and greater integration of renewable generation as the grid decarbonizes.
FOSSIL PLANT REPLACEMENT
A-CAES serves as an alternative to new thermal peaking capacity by providing identical synchronous generation for reliability, without emissions. The technology also has the ability to repurpose decommissioned thermal plants by leveraging the existing interconnection and infrastructure.
RENEWABLE INTEGRATIONA-CAES can help maintain system reliability as the penetration of intermittent generation, like wind and solar, increases and as thermal generation is retired. A-CAES can provide dispatchable or baseloaded renewables and can optimize large solar/wind project economics through time-shifting to reduce curtailment.
TRANSMISSION DEFERRALHow A-CAES Works
Convert Electricity to Compressed Air
Electricity runs an air compressor which converts the electrical energy into compressed air. The compressed air stream is pressurized to the same pressure found at depth where the accumulators are located and the air is stored.
Benefits
Given its performance characteristics and benefits relative to other commercially available storage technologies, A-CAES is particularly well-suited to address the growing need for long-duration energy storage on the grid. Importantly, A-CAES has a unique advantage in its ability to simultaneously provide long storage durations while being flexibly sited where the grid requires it.
- Well-proven mechanical equipment from Tier 1 OEM suppliers is matched with seasoned EPC engineering expertise, system warranty and delivery guarantees
- Proprietary purpose-built air caverns allow for flexible project siting
- No toxic material, contaminants, or thermal impacts on environment; suitable for urban settings
- System design optimized to match client requirements, with independent settings for charge, discharge and storage capacity
- Long-duration of storage enables wide-scale provision of grid capacity
- Synchronous motors and generators provide rotational inertia in support of electrical grid stability
- Full suite of ancillary services available including voltage support, spinning reserve, black start and frequency response
- Lowest installed cost per kWh for large-scale, long-duration energy storage (100+ MW)
- 50+ year system life, with no replacements required and nearly unlimited cycling
- Low operating costs, and increased efficiency over traditional CAES systems
- Adiabatic thermal storage system uses no fossil fuels and results in no emissions
Customer reviews
No reviews were found for Hydrostor - Model A-CAES - Compressed Air Energy Storage Technology. Be the first to review!