Turbines used in compressed air energy storage : literature review

Abstract

Compressed air energy storage (CAES) systems play a critical part in the efficient storage and utilisation of renewable energy. This study provides insights into the application of different turbine types in three CAES sub-technologies (D-CAES, A-CAES and UW-CAES) and their relationship with storage size. A comprehensive literature review and analysis reveals the wide range of applications of axial turbine, radial turbine, and quasi-turbine in different CAES systems. The correlation between storage size and turbine selection is also explored, highlighting the preference for axial turbines in large systems and radial turbines in small scale and micro CAES systems. However, there are some limitations to this study, mainly in terms of the lack of in-depth analyses of turbine performance under real operating conditions, especially when dealing with varying loads and unsteady pressure conditions. In addition, due to the limited resources in the literature, the medium-sized CAES systems are not discussed. Future research should focus on addressing these limitations to enhance the application and optimisation of turbines in CAES systems. In conclusion, intensive research on CAES technology and its key components is essential to achieve a more sustainable and efficient energy system in the future.