AA-CAES系统储能过程运行策略分析

ANALYSIS OF OPERATION STRATEGY DURING ENERGY STORAGE PROCESS IN AA-CAES SYSTEM

提出滑压运行、定压运行和定．滑运行3种储能过程运行策略，采用热力学方法建立系统模型并对比分析3种运行方式的特点。计算结果表明，在给定的设计参数下，滑压运行方式储能效率最高，定压运行方式储能密度最大；调整储气室压力变化范围可提高储能效率，在给定的储气室压力范围内，对于滑压、定压、定．滑运行3种方式储能效率可分别提升21．34％、21．93％、22．17％；压气机效率下降系数对3种运行方式的储能效率有不同影响，随着效率下降系数的提高，滑压和定．滑运行方式的储能效率下降，且定一滑运行方式效率下降更快，而定压运行方式储能效率维持不变，因此，在实际运行中需根据压气机特性确定合适的运行方式。

Three energy storing operation strategies were p in this paper： sliding pressure operation, constant pressure operation and steady-sliding operation. Furthermore, the characteristics of the three operation strategies are compared and analyzed. The results showed that under the given design parameters, the efficiency of the sliding pressure operation strategy is highest, and the energy storage density of the constant pressure operation strategy is highest. The efficiency of the system can be improved by adjusting the gas chamber pressure range. For the three operation strategies, the energy storage efficiency can be increased respectively by 21.34%, 21.93% and 22.17%. The compressor dropping coefficient has different effect on the three operation strategies. With the improvement of the coefficient, the energy storage efficiency of sliding pressure operation and steady-sliding operation are decreased, and the steady-sliding operation decreases more quickly. For the constant pressure operation, the energy storage efficiency remains unchanged. Hence the suitable operation strategy should be determined by the characteristics of the actual compressor.