Adiabatic compressed air energy storage technology(A-CAES) can be used for peak shaving and frequency regulation of renewable energy electricity

which is an effective means to achieve the goal of “Dual Carbon”. In order to study the influence of key parameters such as the number of stages

hot side temperature difference

and throttling valve pressure on thermodynamic efficiency and economy of the system

and achieve the lowest levelized cost of energy(LCOE)

an A-CAES model based on MATLAB is constructed for calculation.The results show that

within the range of simulated working conditions

the efficiency decreases with the increase of the number of stages and the hot side temperature difference

while increases with the throttling valve pressure

and the highest efficiency can reach over 70%. The LCOE of the secondary compression and secondary expansion is the lowest

which is 0.041 3～0.045 0 dollars/(kW·h). The LCOE decreases with the increasing throttling valve pressure. When the hot side temperature difference is greater than 2.5 K

the LCOE increases with the hot side temperature difference. Therefore

the A-CAES can realize efficient and low-cost energy storage.