| 摘要 |
A compressed air energy storage (CAES) and recovery system is provided. The system comprises a plurality of compression stages 1, 37 each driven by an external supply of electrical power 31, 35 provided to compress air, a heat exchanger 5, 9 configured to remove heat from the compressed air, and a compressed air energy storage facility 12. During a storage phase the heat of compression is removed from the compressed air flow by two or more liquid media, the heat being stored in the liquid media used for heat transfer. The first liquid media is capable of thermal storage at temperatures above 350 Centigrade. The second liquid media is capable of thermal storage below 250 Celsius. During an energy recovery phase heat is returned to the air by the same liquid media, and same heat exchangers as those used in storage phase. The reheated compressed air is expanded in at least two separate stages of expansion in which electrical power is generated. Molten salt, or thermic oil may be used as the first liquid media, water may be used as the second liquid media. |
