Using water to compress air for energy storage

How does a water storage system work?

During charging, the air in the water storage vessel and air cavern is compressed by the pumped water. Subsequently, compressors 1 and 2 compress the air into the two tanks for energy storage. During discharging, the compressed air expands and successively transfers the pressure energy to the hydraulic turbine and expander for power generation.

What is underwater compressed air energy storage system?

Underwater compressed air energy storage system In the 1980s, Laing et al. proposed the UWCAES technology, which realizes the constant-pressure storage of compressed air through hydrostatic pressure.

How does liquid air energy storage differ from compressed air storage?

For example, liquid air energy storage (LAES) reduces the storage volume by a factor of 20 compared with compressed air storage (CAS).

How does a compressed air tank work?

As shown in Fig. 23 (b), the compressed air vessel (CAV) is used to pump water. In this case, the water in the lower section of the compressed air vessel (CAV) is discharged into the tank at a higher position. The internal energy of the compressed air is converted into the potential energy of the water.

What are the advantages of compressed air energy storage system?

Compared with other types of energy storage systems, compressed air energy storage (CAES) system has the advantages of low cost, long life, and less impact on environmental. Low cycle efficiency limits its development.

What is compressed air energy storage?

Compressed air energy storage is a promising medium- and long-term energy storage method, and can be used as a large-scale energy storage system to provide a feasible solution for the commercialization of energy storage. Compressed air energy storage technology has the advantages of large energy storage scale, long life, and pollution-free [ 6 ].