定压工况下蓄热式压缩空气储能系统中射气抽气器最佳工作参数分析  

Study on the Optimal Working Parameters of Ejector in TS-CAES System under Constant Pressure Operation

作　　者：文贤馗 王琰[2,3] 钟晶亮 卿绍伟[2,3] 苟小龙[2,3] 唐胜利[2,3] WEN Xian-kui;WANG yan;ZHONG Jing-liang;QING Shao-wei;GOU Xiao-long;TANG Sheng-li(Electric Power Research Institute of Guizhou Power Grid Co., Ltd., Guiyang 550002, China;Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400044, China;College of Energy and Power Engineering, Chongqing University, Chongqing 400044, China)

机构地区：[1]贵州电网有限责任公司电力科学研究院,贵州贵阳550002 [2]低品位能源利用技术及系统教育部重点实验室,重庆大学,重庆400044 [3]重庆大学能源与动力工程学院,重庆400044

出　　处：《节能技术》2021年第6期533-537,541,共6页Energy Conservation Technology

基　　金：贵州省科技支撑计划([2020]2Y064);国家重点研发计划(2017YFB0903600);南方电网公司重点科技项目(GZKJXM20172214)。

摘　　要：在压缩空气储能系统的释能段配气机构中引入射气抽气器被认为是增大系统释能功率的有效途径,但现有研究对射气抽气器的最佳工作参数选取还缺乏系统的研究。基于此,以10 MW蓄热式压缩空气储能系统为对象,分别考虑不同低压气源,揭示了不同定压工况下射气抽气器最大引射系数、被卷吸低压气源总量随工作气体压力的变化规律,并获得了最佳工作气体压力。结果发现,释能过程总功的增幅与定压工况压力负相关,且以第一台膨胀机排汽为低压气源时增幅最大。It is widely recognized that introducing an ejector into the valve train of the energy releasing section of Compressed Air Energy Storage(CAES)system is as an effective way to increase the energy release power.However,there is a lack of systematic research on the selection of the optimal working parameters of the ejector.Based on this,taking a 10 MW thermal-storage CAES system as an example and considering different low-pressure gas sources respectively,the variation laws of the maximum ejection coefficient of the ejector and the total amount of low-pressure entrained gas versus the working gas pressure under different constant pressure conditions are revealed,and the optimal working gas pressure are obtained.Results show that the growth rate of the total output power is negatively related to the pressure of constant pressure operation,and the greatest value of growth rate can be reached when using the exhaust steam of the first expander as the low-pressure gas source.

关 键 词：蓄热式压缩空气储能 射气抽气器 最佳工作气体压力 最佳低压气源 定压工况 

分 类 号：TK011[动力工程及工程热物理]