摘要
以某二次再热塔式炉为研究对象,采用GSE仿真平台与自定义程序结合的方法,建立了二次再热锅炉及其温度控制系统的仿真模型,研究了不同变负荷幅度、速率下,蒸汽温度的动态变化规律,得到了变负荷过程中锅炉实时热效率和佣效率变化规律。结果发现:变负荷幅度越大,负荷指令达到目标值后,蒸汽温度波动的时间越长;降负荷过程中,变负荷速率越大,锅炉实时效率越高,升负荷过程中,变负荷速率越大,锅炉实时效率越低;变负荷速率越快,负荷指令达到目标值后,温度波动的时间越长,瞬态过程中温度变化的幅度越大。变负荷速率每增大0.5%,降负荷过程中,再热蒸汽温度变化幅度增加2℃左右,升负荷过程中,再热蒸汽温度变化幅度增加1℃左右.
With a double reheat tower boiler as the reference case,simulation models of the boiler and its temperature control systems are developed via the GSE platform and user defined codes.The dynamic characteristics of steam temperatures are obtained during load cycling processes with different amplitudes and rates.Moreover,changes of boiler’s real time energy and exergy efficiencies during load cycling processes are obtained.Results show that the time that the steam temperature fluctuates after load command reaches its target prolongs with the load cycling amplitude.The real time efficiency increases with load cycling rate during load down processes.The real time efficiency incresises with the decrease of load cycling rate during load up processes.Moreover,the time that the steam temperature fluctuates after load command reaches target prolongs with the load cycling rate,and the steam temperatures changing amplitude increase with the load cycling rate.When the load cycling rate increases by 0.5 V,the steam temperatures changing amplitude increases^2℃ during load down processes,and it increases^1℃ during load up processes.
作者
王珠
梁凌
陈保卫
刘明
种道彤
严俊杰
WANG Zhu;LIANG Ling;CHEN Bao-Wei;LIU Ming;CHONG Dao-Tong;YAN Jiu-Jie(State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiao Tong University, Xi'an 710049, China;Guodian New Energy Technology Research Institute Co., Ltd, Beijing 102209, China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2019年第10期2199-2205,共7页
Journal of Engineering Thermophysics
基金
国家重点研发计划(No.2017YFB0602101)
国家自然科学基金项目(No.51776146)
关键词
二次再热
温度控制
变负荷
实时效率
double reheat
temperature control
load cycling processes
real time efficiency
