液-液二氧化碳储能系统的性能分析
Performance Analysis of Liquid-liquid Carbon Dioxide Energy Storage System
陈力 1廖传华 1王常青2
作者信息
- 1. 南京工业大学机械与动力工程学院
- 2. 南京三方化工设备监理有限公司
- 折叠
摘要
随着间歇性可再生能源的普及,储能系统在电网中发挥着关键作用.与空气储能系统相比,二氧化碳储能具有储能密度高、易液化、环境友好等优势.首先建立了一种液-液二氧化碳储能系统,然后利用Aspen Plus仿真软件对其储能过程进行建模分析,揭示了储能压力、释能压力、压缩机进口压力、节流阀压降、压缩机效率及膨胀机效率等参数变化对系统性能的影响.最后,对这种液-液二氧化碳储能系统进行了参数分析,得到系统最优工艺参数.同时对系统进行㶲分析,得到㶲损分布,分析讨论了系统产生㶲损的内部原因.
Abstract
With the popularization of intermittent renewable energy,energy storage system plays a key role in the power grid.Compared with the air energy storage system,the carbon dioxide one has advantages of higher energy storage density,easy liquefaction,and environmental friendliness.In this paper,a liquid-liquid carbon dioxide energy storage system was established and Aspen Plus simulation software was used to model and analyze energy storage process.The influences from energy-storing pressure,energy-releasing pressure,compressor inlet pressure,throttle valve pressure drop,compressor efficiency,expander effi-ciency and other parameters on system performance were revealed.Finally,the parameters of this carbon dioxide energy storage system were analyzed to obtain optimal process parameters of the system.In addi-tion,the system was analyzed to obtain Exergy loss distribution and causes thereof.
关键词
二氧化碳储能系统/热力学/参数优化/㶲分析Key words
carbon dioxide energy storage system/thermodynamics/parameter optimization/Exergy analysis引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据