压缩空气储能系统汽轮机运行方式研究  

Investigation of Operation Mode of Air Turbines of Compressed Air Energy Storage System

作　　者：张营 郭森闯 王兴国 杜威 ZHANG Ying;GUO Sen-chuang;WANG Xing-guo;DU Wei(State Grid Hebei Electric Power Company Limited,Electric Power Research Institute Corporation,Shijiazhuang050021, China;School of Energy Power and Mechanical Engineering,North China Electric Power University,Baoding071003, China;State Grid Hebei Energy Technology Service Company Limited,Shijiazhuang050021,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,石家庄050021 [2]国网河北能源技术服务有限公司,石家庄050021 [3]华北电力大学能源动力与机械工程学院,保定071003

出　　处：《汽轮机技术》2018年第6期471-474,477,共5页Turbine Technology

摘　　要：为了研究汽轮机运行方式对压缩空气储能(简称CAES)系统性能的影响,基于两级CAES系统,提出两种汽轮机组运行方式:定-滑和滑-定。从热力学第二定律的角度,对比两种方式下系统的性能差异,并分析汽轮机功率和等熵效率的影响。结果表明:系统基本参数相同时,汽轮机组采用定-滑方式时效率更高、流密度也更大,表明该方式下系统的不可逆损失较小,发电能力更强。定-滑方式的第四级换热器损较小,两种方式下定压运行的那一级汽轮机损较小,对于其它部件的损,两种方式相等;汽轮机总功率增加使流过的空气流量增加,其自身工作时间缩短;汽轮机等熵效率增加对两种方式的影响相同,能够提高效率并增大流密度,此外,除第四级换热器和两级汽轮机外,不影响其它部件的损。To investigate the influence of operation mode of turbines on CAES system performance,two modes which are respectively constant-sliding and sliding-constant are proposed based on two stages CAES system.System performance difference of two modes is compared,and the influence of power and isentropic efficiency of turbines is analyzed from the viewpoint of the second law of thermodynamics.The results show that exergy efficiency and exergy density of constant-sliding mode are larger when basic parameters of system are identical,indicating that irreversible loss of system is smaller and the ability of generating electricity is stronger under this mode.The exergy destruction of fourth heat exchanger of constant-sliding mode is smaller,the exergy destruction of the turbine which adopts constant pressure mode is smaller,but exergy destructions of other components are equivalent for two modes.The increase of the overall power of turbines makes air flow rate augmented and working time shortened.Elevating isentropic efficiency of turbine has the same influence on two modes,and it can increase exergy efficiency and exergy density.Except fourth heat exchanger and two turbines,it doesn't affect exergy destructions of other components.

关 键 词：电网安全稳定性 压缩空气储能 汽轮机 运行方式 效率 流密度 

分 类 号：TK82[动力工程及工程热物理—流体机械及工程]