Performance and Economic Study of Compressed CarbonDioxide Energy Storage Systems

WEI Houqi; HAO Hongliang; QIU Hao; WANG Chaoyu; WANG Yuzhang

doi:10.19805/j.cnki.jcspe.2026.240744

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Performance and Economic Study of Compressed CarbonDioxide Energy Storage Systems

更新时间：2026-10-10

- Performance and Economic Study of Compressed CarbonDioxide Energy Storage Systems
- Chinese Journal of Power Engineering Vol. 46, Issue 2, Pages: 113-122(2026)
- 作者机构：
  
  1. 上海交通大学机械与动力工程学院,上海,200240
  2. 北京大学鄂尔多斯能源研究院,内蒙古,鄂尔多斯,017010
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.240744
  CLC：
- Online First：10 February 2026，
  
  Published：10 February 2026
- 稿件说明：
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魏厚祺,郝洪亮,邱皓,王超宇,王玉璋. 压缩二氧化碳储能系统性能和经济性研究动力工程学报, 2026, 46(2): 113-122 https://doi.

org/10.19805/j.cnki.jcspe.2026.240744
魏厚祺,郝洪亮,邱皓,王超宇,王玉璋. 压缩二氧化碳储能系统性能和经济性研究动力工程学报, 2026, 46(2): 113-122 https://doi. DOI： 10.19805/j.cnki.jcspe.2026.240744.

org/10.19805/j.cnki.jcspe.2026.240744 DOI：

摘要

为了推动高效率、大规模储能技术发展

保障电网供需平衡

提出了一种低压亚临界压缩二氧化碳储能系统

建立了静态和动态模型

对系统不同运行模式下的充、放电过程进行热力学性能和经济性分析。结果表明:典型工况下系统储能效率约为63.37%;稳态过程中充电所消耗的电量、放电所产生的电量均高于动态模拟结果

不同模式下系统储能效率为24.86%~58.65%;结合上海市分段电价

系统投资回收周期为5.98~7.45 a

提升压缩机和膨胀机的等熵效率均有利于提升系统储能效率

缩短投资回收周期。

Abstract

To promote the development of high-efficiency

large-scale energy storage technology and ensure the balance of supply and demand in the power grid

a low-pressure subcritical compressed carbon dioxide energy storage (CCES) system was proposed

and static and dynamic models were established to analyze the thermodynamic performance and economics during the charging and discharging processes in different operating modes of the system. Results show that the energy storage efficiency under typical operating conditions is 63.37%. The energy consumed during charging process and power generated during discharging process in the steady-state conditions are higher than those in the dynamic simulations

the energy storage efficiency of the system in different modes ranges from 24.86% to 58.65%. Combined with the time-of-use electricity price in Shanghai city

the investment payback period of the system is approximately 5.98-7.45 years

and the isentropic efficiency improvement of the compressor and the expander is conducive to the enhancement of the system energy storage efficiency and the shortening of the investment payback period.

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references

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