Adiabatic compressed air energy storage provides an efficient and emission free approach for large-scale energy storage. In adiabatic compressed air energy storage system with isochoric air storage tank, the throttle valves cause large exergy losses. To reduce throttling loss, a novel system is proposed by regulating the discharging pressure with an inverter-driven air compressor. Variable- and constant-output power operation modes of the novel system are proposed and studied from the aspects of exergy, economic and dynamic characteristic analysis. Furthermore, parametric analysis of the novel system is conducted from the perspective of the system discharge total output power, inverter-driven compressor efficiency and equipment purchase cost. The results indicate that for the novel system, the round-trip efficiency is improved by 1.8–2.7%, and the levelized cost of electricity decreases by 0.57–0.85 ¢/kWh. Hence, the proposed novel system is verified an effective way for adiabatic compressed air energy storage system optimization.

绝热压缩空气储能为大规模储能提供了一种高效且无排放的方法。在采用等容储气罐的绝热压缩空气储能系统中，节流阀会造成较大的火用损失。为了减少节流损失，提出了一种通过变频驱动空气压缩机调节排气压力的新型系统。从火用、经济性和动态特性分析等方面提出并研究了新型系统的可变和恒定输出功率运行模式。此外，从系统排放总输出功率、变频驱动压缩机效率和设备采购成本的角度对新型系统进行了参数分析。结果表明，对于新系统，往返效率提高了 1.8-2.7%，电的平准化成本下降 0.57-0.85 美分/千瓦时。因此，所提出的新系统被验证为绝热压缩空气储能系统优化的有效途径。