Research progress of expander for compressed carbon dioxide energy storage system

LI Hong; BAI Yuxin; HE Qing

doi:10.19666/j.rlfd.202305077

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Research progress of expander for compressed carbon dioxide energy storage system

Thermal Power Generation Vol. 53, Issue 2, Pages: 17-26(2024)

更新时间：2025-09-28

- Research progress of expander for compressed carbon dioxide energy storage system
- 作者机构：
  
  华北电力大学能源动力与机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202305077
  CLC： TK02
- Published：2024
- 稿件说明：
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LI Hong, BAI Yuxin, HE Qing. Research progress of expander for compressed carbon dioxide energy storage system[J]. Thermal Power Generation, 2024, 53(2): 17-26.
DOI：

LI Hong, BAI Yuxin, HE Qing. Research progress of expander for compressed carbon dioxide energy storage system[J]. Thermal Power Generation, 2024, 53(2): 17-26. DOI： 10.19666/j.rlfd.202305077.

摘要

压缩二氧化碳储能系统具有储能密度大、系统设备紧凑、运行寿命长等优点。膨胀机是储能系统的关键设备，对整个储能系统的效率和性能有直接影响。综述了各类膨胀机的研究现状；介绍了不同类型二氧化碳膨胀机的工作原理及特点；提供了可在压缩二氧化碳储能系统中应用的膨胀机类型；分析了应用于储能系统的4种膨胀机存在的问题及其解决方案；指出了二氧化碳膨胀机的研究方向，包括设计方法优化、关键部件结构优化、泄漏、密封、摩擦、润滑等，为压缩二氧化碳储能系统膨胀机的优化设计提供参考。

Abstract

Compressed carbon dioxide energy storage system has the advantages of large energy storage density

compact system equipment and long operating life. Expander is the key equipment of the energy storage system and has a direct effect on the efficiency and performance of the entire energy storage system. This article reviews the research status of various types of expanders. The working principle and characteristics of different types of carbon dioxide expanders are introduced. The expander types that can be used in compressed CO2 energy storage systems are provided. The problems and their countermeasures of four kinds of expanders applied to energy storage systems were analyzed. The research direction of CO2 expander is pointed out

including design method optimization

key component structure optimization

leakage

sealing

friction

and lubrication

and so on

which provides reference for the optimal design of the expansion machine of compressed CO2 energy storage systems.

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