不同运行方案AA-CAES系统性能分析及优

Aiming at the problems of single storage mode, single output mode and low exergic efficiency of the advanced adiabatic compressed air energy storage (AA-CAES) system, four combination schemes of different output mode and storage mode were proposed, and system parameters were optimized under different operation schemes. The effects of energy storage power, maximum pressure ratio of gas storage chamber and compressor inlet temperature on the system performance under the four schemes were discussed from thermodynamic and economic point of view. Using the NSGA-Ⅱ algorithm, multi-objective optimization of the system was carried out with exergic density and annual interest rate as the objective function. Results show that exergic efficiency and annual interest rate are the highest in scheme 3, while exergic density is the biggest in scheme 4. With the increase of energy storage power, exergic efficiency and annual interest rate of the four schemes increase, while exergic density decreases. As maximum pressure ratio of gas storage chamber increases, exergic efficiency and annual interest rate of the system decrease, while exergic density increases. As compressor inlet temperature increases, annual interest rate and exergic efficiency of the system decrease, and exergic density of the system increases in scheme 3 and scheme 4, while decreases in scheme 1 and scheme 2. The optimal exergic densities of the four schemes are 5.92 MJ/m³, 6.73 MJ/m³, 9.00 MJ/m³and 9.84 MJ/m³, respectively, and the optimal annual interest rates are 19.19%, 16.04%, 25.40% and 21.25%, respectively.