Thermodynamics and economic analysis of adiabatic compressed air energy storage system
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.
A-CAESefficiencyLCOEhot side temperature differencethrottling valve pressure
万方数据
维普
