储能科学与技术2024，Vol.13Issue(6)：1877-1887,11.DOI:10.19799/j.cnki.2095-4239.2024.0099
新型喷射增效压缩空气储能系统性能
Theoretical analysis of a novel ejector augmented compressed air energy storage system
摘要
Abstract
This study proposes a novel ejector-augmented adiabatic compressed air energy storage system designed to mitigate the significant pressure loss observed in conventional systems during constant-pressure operation.It employs a two-stage ejector to harness the exhaust gas after expansion,thereby recovering part of the lost pressure energy and enhancing the expander's inlet flow rate to boost the system's power generation capacity.We developed a thermodynamic model for this novel system and performed a comparative analysis with conventional systems using identical operating parameters.This study focuses on the effects that the primary fluid pressure,secondary fluid pressure,and intermediate pressure within the two-stage ejector have on system performance.Results reveal that increasing these pressures causes the full-cycle efficiency of the system to follow an approximate parabolic trend.Furthermore,the optimal operating parameters of the ejector have been identified.Under optimal working conditions,the system's full-cycle efficiency is 63.32%,indicating an improvement of 0.91%over the 62.41%efficiency achieved by the conventional throttling-down method.Based on the above,this study establishes a theoretical foundation for enhancing the ejector efficiency of compressed air energy storage systems,aiming to reduce throttling loss and improve overall performance.关键词
压缩空气储能/两级喷射器/恒压运行/循环效率Key words
compressed air energy storage/two-stage ejector/constant pressure operation/cycle efficiency分类
能源科技引用本文复制引用
郭祚刚,刘通,徐敏,徐申,陈光明,郝新月..新型喷射增效压缩空气储能系统性能[J].储能科学与技术,2024,13(6):1877-1887,11.基金项目
南方电网公司科技项目(KYKJXM20210214). （KYKJXM20210214）
