Why is water injected into compressed air energy storage systems?

The presence of water in compressed air energy storage systems improves the efficiency of the system, hence the reason for water vapour being injected into the system [, ]. This water vapour undergoes condensation during cooling in the heat exchangers or the thermal energy system [, ].

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 does a compressed air energy storage system work?

The compressors- one of the key components of compressed air energy storage systems operate using prime movers, such as motors [, ]. These compressors pressurize air as it starts its journey into the storage cavern .

What determinants determine the efficiency of compressed air energy storage systems?

Research has shown that isentropic efficiency for compressors as well as expanders are key determinants of the overall characteristics and efficiency of compressed air energy storage systems . Compressed air energy storage systems are sub divided into three categories: diabatic CAES systems, adiabatic CAES systems and isothermal CAES systems.

What is liquid air energy storage?

Energy 5 012002 DOI 10.1088/2516-1083/aca26a Article PDF Liquid air energy storage (LAES) uses air as both the storage medium and working fluid, and it falls into the broad category of thermo-mechanical energy storage technologies.

What is liquid air storage system?

The liquid air storage system is detailed in Section 2.2. Thermal energy storage systems are categorized based on storage temperature into heat storage and cold storage. Heat storage is employed for storing thermal energy above ambient temperature, while cold storage is used for storing thermal energy below ambient temperature.