Recent advancements have focussed on optimising thermodynamic performance and reducing energy losses during charge–discharge cycles, while innovative configurations have been proposed to integrate multi-generation outputs such as cooling, heating, desalinated water and hydrogen. Recent advancements have focussed on optimising thermodynamic performance and reducing energy losses during charge–discharge cycles, while innovative configurations have been proposed to integrate multi-generation outputs such as cooling, heating, desalinated water and hydrogen. A pressurized air tank used to start a diesel generator set in Paris Metro Compressed-air-energy storage (CAES) is a way to store energy for later use using compressed air. At a utility scale, energy generated during periods of low demand can be released during peak load periods. The first. This technology strategy assessment on compressed air energy storage (CAES), released as part of the Long-Duration Storage Shot, contains the findings from the Storage Innovations (SI) 2030 strategic initiative. The objective of SI 2030 is to develop specific and quantifiable research, development. Compressed Air Energy Storage (CAES) has emerged as one of the most promising large-scale energy storage technologies for balancing electricity supply and demand in modern power grids. This process allows energy.