计及喷射器性能的压缩空气储能系统释能发电效益研究

文贤馗; 王维; 张世海; 周科; 曾栋坪

doi:10.19666/j.rlfd.202510070

English

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计及喷射器性能的压缩空气储能系统释能发电效益研究

Thermal Power Generation Vol. 55, Issue 2, Pages: 65-74(2026)

更新时间：2026-08-07

- 计及喷射器性能的压缩空气储能系统释能发电效益研究
- 作者机构：
  
  1. 贵州电网电力科学研究院
  2. 长沙理工大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202510070
  CLC： TK02;TM73
- Published：2026
- 稿件说明：
移动端阅览
[1]文贤馗,王维,张世海,等.计及喷射器性能的压缩空气储能系统释能发电效益研究[J].热力发电,2026,55(02):65-74.
[1]文贤馗,王维,张世海,等.计及喷射器性能的压缩空气储能系统释能发电效益研究[J].热力发电,2026,55(02):65-74. DOI： 10.19666/j.rlfd.202510070.

DOI：10.19666/j.rlfd.202510070.

摘要

【目的】针对日尺度电网负荷周期性波动导致的源-荷失衡问题，研究压缩空气储能(compressed air energy storage

CAES)系统中喷射器的性能优化方法，以提升系统整体能效与运行调控能力。在CAES系统中，喷射器兼具调节空气参数与引射低压乏气的双重功能，其工作性能对系统效率具有重要影响。【方法】以某在建10 MW级CAES示范系统为研究对象，结合响应面法与CFD软件数值模拟，分析喷射器在变压运行条件下的性能特性，确定其高效工作区间；进一步基于性能结果和释能变压力特性设计储气罐容积，并预测系统发电能力。【结果】喷射器的引射性能对工作气体压力与引射乏气压力变化敏感，在工作气体压力为10.00～11.75 MPa、引射乏气压力为5.6 MPa时，喷射器的引射性能表现最优。喷射器的出口背压对其内部的流场结构与CAES系统的运行工况影响显著。当背压为8.0 MPa时，喷射器在工作压力为12.00～10.00 MPa时高效运行，能量利用率最高达10.46%；配置2.2×10

储气罐的CAES系统在背压8.0 MPa条件下，能够以设计功率持续运行4.0 h，其能量转化率为16.67%，释能发电量累计达5.01×10

kW·h，较无喷射器系统提升2.04%。【结论】通过明确喷射器高效运行区间并合理配置储气罐容积，可有效提高CAES系统发电效益，为工程实际中的系统优化与运行策略制定提供依据。

Abstract

[Objective

]

Against the source-load imbalance caused by daily-scale periodic fluctuations in grid loads

this study investigates performance optimization methods for ejectors within compressed air energy storage(CAES) systems. The aim is to improve the overall efficiency of CAES systems in terms of power generation during energy release

as well as enhance their operational control capabilities during actual operation. In CAES systems

the ejector performs the dual functions of regulating the state parameters of the working gas and introducing lo

wpressure exhaust gas. This critically affects the system efficiency. [Methods

]

By taking a 10 MW-class CAES demonstration system under construction as the research subject

this study combines response surface methodology with Computational Fluid Dynamics(CFD) numerical simulation to analyze the ejector's entrainment performance under varying working gas pressures

entrainment exhaust gas pressures

and outlet backpressure conditions. This determines the ejector's efficient operating range. Subsequently

the volume of the storage tank is designed based on the entrainment performance results of the ejector and the variable pressure operating conditions during the energy release process of the CAES system. The power generation capacity of the CAES system is then predicted using a theoretical model. [Results

]

The entrainment performance of the ejector is sensitive to variations in the working gas pressure and the entrainment exhaust gas pressure. Optimal entrainment characteristics are achieved when the working gas pressure is between 10.0 and 11.75 MPa

and the entrainment exhaust gas pressure is 5.6 MPa. The outlet back pressure of the ejector significantly affects the structure of the internal flow field and the operational window of the CAES system. Higher back pressure results in a narrower operating pressure range

necessitating larger storage tank volumes and reducing energy release efficiency. When the back pressure is 8.0 MPa

the ejector operates efficiently within a working pressure range of 10.00～12.00 MPa

achieving an energy utilization efficiency rate of 10.46%. A CAES system with a 2.2×10

storage tank can sustain continuous operation at design power for 4.0 hours under a back pressure of 8.0 MPa. Its energy conversion efficiency is 16.67%

with cumulative energy released for power generation reaching 5.01×10

kW·h. This represents a 2.04% improvement on systems without an ejector. [Conclusion

]

Defining the high-efficiency operating range of the ejector and ration

ally configuring the air storage tank volume can effectively enhance the power generation capabilities of the CAES system

providing a foundation for optimizing the system and formulating operational strategies in engineering practice.

关键词

Keywords

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