Study on Compressed Carbon Dioxide Energy Storage SystemBased on Brayton Cycle

江然; 刘广林; 吴玉翔; 徐进良

doi:10.19805/j.cnki.jcspe.2026.240770

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Study on Compressed Carbon Dioxide Energy Storage SystemBased on Brayton Cycle

更新时间：2026-10-10

- Study on Compressed Carbon Dioxide Energy Storage SystemBased on Brayton Cycle
- Chinese Journal of Power Engineering Vol. 46, Issue 2, Pages: 123-132(2026)
- 作者机构：
  
  华北电力大学低品位能源多相流与传热北京市重点实验室,北京,102206
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.240770
  CLC：
- Online First：10 February 2026，
  
  Published：10 February 2026
- 稿件说明：
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江然,刘广林,吴玉翔,徐进良. 基于布雷顿循环的压缩二氧化碳储能系统研究动力工程学报, 2026, 46(2): 123-132 https://doi.

org/10.19805/j.cnki.jcspe.2026.240770
江然,刘广林,吴玉翔,徐进良. 基于布雷顿循环的压缩二氧化碳储能系统研究动力工程学报, 2026, 46(2): 123-132 https://doi. DOI： 10.19805/j.cnki.jcspe.2026.240770.

org/10.19805/j.cnki.jcspe.2026.240770 DOI：

摘要

为研究相同级数下跨临界压缩二氧化碳储能(TC-CCES)系统和超临界压缩二氧化碳储能(SC-CCES)系统的性能特点

通过Matlab软件建立基于布雷顿循环的压缩二氧化碳储能系统模型

分析系统的热力学性能和损分布并进行敏感性分析。结果表明:在设计工况下

SC-CCES系统的循环效率、效率和储能密度分别为66.78%、58.43%和255.63 kW·h/m

TC-CCES系统的循环效率、效率和储能密度分别为61.21%、54.30%和545.69 kW·h/m

;损分析表明改善换热器的性能可有效提高2种系统的效率;提高储能压力和释能压力以及环境温度接近CO

临界温度时

2种系统的循环效率和效率均会升高

而降低级间冷却器水温可提高TC-CCES系统的性能

但对SC-CCES系统性能的影响不大;在二级压缩、二级膨胀条件下

SC-CCES系统具有较高的循环效率和效率

而TC-CCES系统的储能密度是SC-CCES系统的2倍左右。

Abstract

In order to study the performance characteristics of transcritical compressed carbon dioxide energy storage (TC-CCES) system and supercritical compressed carbon dioxide energy storage (SC-CCES) system with the same stages

a compressed carbon dioxide energy storage (CCES) system model based on Brayton cycle was established by Matlab software

the thermodynamic performance and exergy destruction distribution of the system were analyzed

and sensitivity analysis was carried out. Results show that under the design conditions

the cycle efficiency

exergy efficiency and energy storage density of SC-CCES system are 66.78%

58.43% and 255.63 kW·h/m

respectively

and those of TC-CCES system are 61.21%

54.30% and 545.69 kW·h/m

respectively. Exergy destruction analysis shows that improvement of the heat exchanger performance effectively improves the exergy efficiency of both systems. Increasing the energy storage pressure and energy release pressure and making the ambient temperature close to the critical temperature of CO

the cycle efficiency and exergy destruction of both systems will increase

while decreasing the water temperature of interstage cooler can improve the performance of TC-CCES system

but it can't have much effect on SC-CCES system. Under the conditions of two-stage of compression and two-stage of expansion

SC-CCES system has better cycle efficiency and exergy efficiency

while the energy storage density of TC-CCES system is about twice that of SC-CCES system.

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references

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