为了克服可再生能源的波动性对于电网稳定运行的影响,储能技术被视为解决路径之一,二氧化碳储能(Carbon dioxide energy storage,CES)作为新型储能技术之一,能量密度较高且地理位置依赖度较低,比较有发展潜力,透平膨胀机作为CES系统的核心部件,直接影响着系统的性能。本文首先介绍了CES的基本原理；之后总结了CO2透平膨胀机的主要类型及特征,归纳了关于膨胀机设计方法和数值分析的研究；论述了部分进气和密封方式对透平膨胀机性能的影响规律；最后分析了已有的CO2实验研究系统,归纳了其透平膨胀机的设计参数。从而为CES系统及其透平膨胀机的设计开发提供参考。

For overcoming the impact of renewable energy fluctuations on grid stability, energy storage technology is considered as one of the solution paths. Carbon dioxide energy storage, as one of the new energy storage technologies, has the advantages of higher energy density and lower geographic dependence, which becomes a promising energy storage technology. The turbine expander, as the core component of the CO2 energy storage system, has a direct impact on the performance of the system. The basic principle of carbon dioxide energy storage technology is introduced first. Then the different types of CO2 turbine expanders and their main features are further summarized. The study on the design methodology and numerical analysis of expander are summarized. The influences of partial intake and sealing method on the performance of turbine expander are discussed. Finally, the existing CO2 experimental systems are analyzed and the design parameters of its turbine expander are summarized, which provides a reference for the design and development of CO2 energy storage systems and their turbine expanders.

TK14

国家自然科学基金(52206032)