[Objective] Compressed air energy storage technology is mature and flexible to operate

making it a highly promising energy storage solution. To effectively improve the performance of compressed air energy storage systems

this study proposes an integrated system that couples them with concentrated solar power(CSP) plants. [Methods] During the energy storage phase

low-temperature condensate from the solar thermal power plant's regenerative system is used to cool the high-temperature compressed air at the compressor outlet

thereby recovering and reusing the compression heat. During the energy release phase

the compressed air is heated in stages using high-temperature molten salt and high-temperature feedwater from the CSP plant. Through system integration

the compression heat is effectively utilized

while simultaneously reducing the thermal storage equipment required in the original compressed air energy storage system. A thermodynamic model of the coupled system was constructed

and energy

exergy

and economic analyses were conducted on the proposed coupled system to evaluate its performance. [Results] The proposed system achieved a round trip efficiency of 74.95% and an exergy efficiency of 79.78%

with an energy storage density of 8.18 MJ/m3. Furthermore

the system's dynamic payback period was 4.42 years

and its net present value was 49.358 9 million yuan. [Conclusion] The proposed integrated system of solar thermal power station and compressed air energy storage exhibits significant efficiency improvement and good economic performance

providing valuable reference for the development of renewable energy coupled energy storage systems.