摘要
绝热压缩空气储能(adiabatic compressed air energy storage,A-CAES)系统通常采用恒容储气的方式储存空气,导致空气不能完全从储气装置内释放,存在能量储存密度低、单位储气成本高的问题。为此提出了基于工质相变的变容储气A-CAES系统,通过借助外部工质的压力迫使空气完全从储气装置中释放。然而,采用变容储气的方式增加了储气装置复杂性和设备投资成本。因此,本文对基于工质CO_(2)相变的变容储气A-CAES系统进行了技术经济性分析,并与恒容储气A-CAES系统进行了对比。结果表明,基于工质相变的变容储气A-CAES系统的能量储存密度为28.30 MJ/m^(3),比恒容储气A-CAES系统的储能密度提高了83.65%。采用变容储气的方式可以使储气装置的单位储气成本从49.17元/kg降低至36.59元/kg。在整个系统运行周期内,基于工质相变的变容储气A-CAES系统的动态投资回收期和项目净现值分别为7.36 a和101427.85万元,比恒容储气A-CAES系统减少了1.45 a和增加了3831.74万元。基于工质相变的变容储气A-CAES系统具有较好的应用前景。
Adiabatic compressed air energy storage(A-CAES)systems commonly employ constant-volume gas storage,leading to incomplete air release from the storage vessel,resulting in challenges such as low energy storage density and high unit storage cost.To address this issue,a variable-volume gas storage A-CAES system based on working medium phase transition is proposed,which utilizes external working medium pressure to ensure complete air release from the storage device.However,adopting variable-volume gas storage increases the complexity of the storage system and equipment investment costs.Therefore,the technical and economic analysis of the variable volume gas storage A-CAES system based on the CO_(2)phase change of the working fluid is carried out in this paper,and compared with the constant volume gas storage A-CAES system.The results indicate that the energy storage density of the variable-volume gas storage A-CAES system based on working medium phase transition is 28.30 MJ/m^(3),which is 83.65%higher than that of the constant-volume gas storage A-CAES system.The variable volume gas storage method can reduce the unit gas storage cost from 49.17 yuan/kg to 36.59 yuan/kg.Over the entire operational period,the dynamic payback period and net present value of the variable-volume gas storage A-CAES system are 7.36 years and 1.01 billion yuan,respectively,which is 1.45 years less and 38.32 million yuan more than that of the constant-volume gas storage A-CAES system.
作者
张留淦
邓硕
叶楷
陈龙祥
ZHANG Liugan;DENG Shuo;YE Kai;CHEN Longxiang(Quanzhou Institute of Equipment Manufacturing,Haixi Institutes,Chinese Academy of Sciences,Quanzhou 362200,China;College of Mechanical and Electrical Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《电力科技与环保》
2024年第3期266-275,共10页
Electric Power Technology and Environmental Protection
基金
福建省科技计划项目(2021H0045)
泉州市科技计划项目(2022C019R)。
关键词
绝热压缩空气储能
变容储气
工质相变
能量储存密度
单位储气成本
adiabatic compressed air energy storage
variable volume gas storage
working medium phase transition
energy storage density
unit gas storage cost
