Compressed-air-energy-storage (CAES) system and method

A compressed air energy storage system (1) is described. The system comprises a first compressor arrangement (3) for compressing a flow of air; a thermal energy storage unit (13) by means of which thecompressed air from the first compressor arrangement (3) exchanges heat with respect to the heat accumulation means; an air storage device (17) which is arranged and designed to receive and accumulate compressed air from the thermal energy storage unit (13); and at least one expander (21) for receiving the compressed air from the air storage device (17) and generating useful power therefrom. A further compressor arrangement (15) is located between the thermal energy storage unit (13) and the air storage device (17). 描述了一种压缩空气能量储存系统(1)。系统包括：用于压缩空气流的第一压缩机布置(3)；热能储存单元(13)，通过其，来自第一压缩机布置(3)的压缩空气相对于热积聚器件交换热；空气储存装置(17)，该空气储存装置(17)布置并且构造用于接收和积聚来自热能储存单元(13)的压缩空气；至少一个膨胀器(21)，该至少一个膨胀器(21)用于接收来自空气储存装置(17)的压缩空气，并且产生来自其的有用功率。又一压缩机布置(15)位于热能储存单元(13)和空气储存装置(17)之间。