500KW compressed air energy storage in Aarhus Denmark covers an area of

What is compressed air energy storage (CAES)?

Compressed Air Energy Storage (CAES) systems offer a promising approach to addressing the intermittency of renewable energy sources by utilising excess electrical power to compress air that is stored under high pressure. When energy demand peaks, this stored air is expanded through turbines to generate electricity.

Where can a compressed air energy storage facility be built?

Compressed Air Energy Storage (CAES) facilities can be built in locations that have suitable geological formations for storing compressed air. Ideal sites typically include underground caverns, such as salt domes, depleted natural gas fields, or aquifers, which can effectively contain the high-pressure air.

How is high-pressure air stored?

The high-pressure and high-temperature air is cooled before being stored in an air reservoir. The thermal energy can be dissipated into the atmosphere, stored in TES, or used for heating applications. In the discharging process, stored high-pressure air is released whenever the electricity is required.

What is Siemens Energy compressed air energy storage?

Siemens Energy Compressed air energy storage (CAES) is a comprehensive, proven, grid-scale energy storage solution. We support projects from conceptual design through commercial operation and beyond.