Adiabatic compressed air energy storage systems

Adiabatic Compressed Air Energy Storage (ACAES) is a thermo-mechanical storage concept that utilizes separate mechanical and thermal exergy storages to transfer energy through time. In this document, a short technology evolution report is followed by a complete thermodynamic modelling, in which frequently used components are addressed under energy and exergy viewpoints. Then, the recent commercial CAES projects and future ACAES challenges have been investigated, resulting in several identified outstanding challenges still to overcome in order to establish ACAES position as a major contender as a large-scale energy storage system.