跨临界二氧化碳储能系统研究

This paper presentsed a transcritical carbon dioxide energy storage system in order to address the urgent need of energy system in electric system and the bottleneck of compressed air energy system in terms of technology and application. The system uses carbon dioxide, which has low supercritical pressure and is easy to liquefy, to overcome the difficulty of liquefaction and low temperature storage in liquefied air storage. The results show that the system performance is optimized with the key parameters, and the optimal system efficiency is 49.15%. Meanwhile, exergy analysis is conducted based on the system and key process to identify the part with large exergy loss. The transcritical carbon dioxide energy storage system with good application prospect has the advantages of green, independent of geographical conditions, large energy storage density and so on.