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.首先建立了一种超临界-超临界二氧化碳储能系统,然后利用Aspen Plus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、加热器加热温度、节流阀压降、压缩机效率、膨胀机效率等参数变化对系统性能的影响.最后,对二氧化碳储能系统进行参数分析,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,并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 air energy storage system,carbon dioxide has the advantages of high energy storage density,easy liquefaction,and environmental friendliness.Firstly,a supercritical-supercritical carbon dioxide energy storage system is established.Then,Aspen Plus simulation software is used to model and analyze the energy storage process.The effects of parameter changes such as energy storage pressure,energy release pressure,heater heating temperature,throttle valve pressure drop,compressor efficiency,expander efficiency and other parameters on system performance are revealed.Finally,the parameters of this carbon dioxide energy storage system are analyzed to obtain the optimal process parameters of the system.At the same time,the system is analyzed to obtain the loss distribution,and the internal causes of the system are analyzed and discussed.
维普
万方数据