LONG DURATION ENERGY STORAGE

Efficient, Economical, Anywhere


LONG DURATION ENERGY STORAGE

Efficient, Economical, Anywhere

A simple, cost-effective and reliable process

 

The CO2 Battery is a long duration and large scale energy storage system based on a thermodynamic process that efficiently stores energy by manipulating CO2 under different state conditions in a closed thermodynamic transformation. The CO2 Battery can operate in charging mode (absorbing power from the grid) and discharging mode (returning power to the grid).

When operating in charging mode, the CO2 is withdrawn from an atmospheric gasholder, the Dome, and compressed into an inter-refrigerated compressor. The heat generated from the compression is stored in two Thermal Energy Storage Systems.

The CO2 is then condensed and stored under pressure at ambient temperature in the CO2 liquid vessels. When the system is operating in discharging mode, the liquid CO2 is evaporated and heated by recovering heat from the Thermal Energy Storage Systems.

The CO2 stream then expands into a reheated turbine, returning power to the grid and it is stored into the Dome at ambient temperature and pressure without any leakage to the atmosphere.

A simple, cost-effective and reliable process

The CO2 Battery is a long duration and large scale energy storage system based on a thermodynamic process that efficiently stores energy by manipulating CO2 under different state conditions in a closed thermodynamic transformation. The CO2 Battery can operate in charging mode (absorbing power from the grid) and discharging mode (returning power to the grid).

When operating in charging mode, the CO2 is withdrawn from an atmospheric gasholder, the Dome, and compressed into an inter-refrigerated compressor. The heat generated from the compression is stored in two Thermal Energy Storage Systems.

The CO2 is then condensed and stored under pressure at ambient temperature in the CO2 liquid vessels. When the system is operating in discharging mode, the liquid CO2 is evaporated and heated by recovering heat from the Thermal Energy Storage Systems.

The CO2 stream then expands into a reheated turbine, returning power to the grid and it is stored into the Dome at ambient temperature and pressure without any leakage to the atmosphere.

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Simplicity
as the key for cost competitiveness
and high efficiency

The process comprises only two thermodynamic transformations: one compression and one expansion. This allows for RTEs of above 75%. This allows the system to operate efficiently for decades.


The CO2 Battery uses only water, steel and CO2, readily available on the market by multiple Tier 1 suppliers. This enables a fast commercialization and a safe and reliable operation of the CO2 battery.

Reliable “off the shelf”
equipment

Simplicity
as the key for cost competitiveness
and high efficiency

 

The process comprises only two thermodynamic transformations: one compression and one expansion. This allows for RTEs of above 75%. This allows the system to operate efficiently for decades.


Reliable “off the shelf”
equipment

 

The CO2 Battery uses only water, steel and CO2, readily available on the market by multiple Tier 1 suppliers. This enables a fast commercialization and a safe and reliable operation of the CO2 battery.

CO2 Battery Bricks

 
 
 

Energy Dome has developed standardized equipment «bricks» that can be combined together to build the perfect CO2 Battery for different customer needs and applications. Charging power (Compression), discharging power (Expansion) and storage capacity can be configured independently within a range of standardized solutions in order to optimize the business plan of any specific project.

 

CO2 Battery Bricks

 
 
 

Energy Dome has developed standardized equipment «bricks» that can be combined together to build the perfect CO2 Battery for different customer needs and applications. Charging power (Compression), discharging power (Expansion) and storage capacity can be configured independently within a range of standardized solutions in order to optimize the business plan of any specific project.

 

Revenue Stacking

 
 
 

With the increase of grid instability due to the increasing share of inverter based power or unpredictable inertia, grid balancing services become a key factor for a safe and reliable grid operation.

The CO2 Battery provides the frequency and voltage regulation services needed for the reliable and safe operation of the electrical grid, thereby ensuring multiple revenue streams for developers and operators.

The CO2 Battery  can also be adapted to provide Fast Response services with a special configuration of the compressor and expander. In this case the plant uses two separated electrical machines, a dedicated motor drives the compressor and the expander moves a dedicated generator. Both compressor and expander will spin synchronously to the grid whilst the compressor discharge feeds the compressed CO2 into the expander.

 

Revenue Stacking