What is compressed air energy storage?

Compressed air energy storage (CAES) is the use of compressed air to store energy for use at a later time when required , , , , . Excess energy generated from renewable energy sources when demand is low can be stored with the application of this technology.

Where can compressed air energy be stored?

The number of sites available for compressed air energy storage is higher compared to those of pumped hydro [, ]. Porous rocks and cavern reservoirs are also ideal storage sites for CAES. Gas storage locations are capable of being used as sites for storage of compressed air .

How is air compressed?

In Compressed Air Energy Storage, air is compressed using compressors and stored in storage tanks. The compressor is run by a motor generator to which the excess available energy is fed.

What are the advantages of compressed air energy storage systems?

One of the main advantages of Compressed Air Energy Storage systems is that they can be integrated with renewable sources of energy, such as wind or solar power.

How is compressed air stored?

Storage: The compressed air is stored in the storage vessel until it is needed to generate electricity. The storage vessel must be air-tight to prevent any loss of compressed air. Expansion: When electricity is needed, the compressed air is released from the storage vessel and sent through a pipeline to a turbine.

What is a compressed air storage system?

The compressed air storages built above the ground are designed from steel. These types of storage systems can be installed everywhere, and they also tend to produce a higher energy density. The initial capital cost for above- the-ground storage systems are very high.