The arrangement of micro adiabatic compressed air energy storage(A-CAES) system is flexible and suitable for typical distributed energy systems. By accurately modelling a typical device of the miniature A-CAES system based on pneumatic motors

a thermodynamic model that can reflect its system performance is constructed. The experimental bench of the A-CAES system is built

and the average error rate between the simulation model and the experiment is around 5.38%

which verifies the reliability of the model. The round-trip efficiency and comprehensive efficiency of the system are 4.81% and 27.23%

respectively

verifying the necessity of the existence of thermal energy storage devices in the A-CAES system. The effects of compression level and compression ratio on the system performance are analyzed by using this model. The results show that

as the compression level increases

the round-trip efficiency and comprehensive efficiency of the system both increase

and the optimal efficiency of the system can reach 6.10% and 35.81%

respectively. Taking the combination of compression ratios of 2

3

and 5 as an example

reasonable distribution of compression ratios can improve the round-trip efficiency and overall efficiency of the system by 1.27% and 4.38%

respectively.