锅炉过热器/再热器管道热流密度的评估方法  

Assessment method for heat flux of superheater/reheater tubes

作　　者：徐鸿[1] 赵志渊[1] 林振娴[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《吉林大学学报（工学版）》2012年第1期39-45,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：中央高校基本科研业务费专项项目(09QX61)

摘　　要：通过建立数值模型进行编程计算,分析了锅炉过热器/再热器管道在不同的管道几何尺寸、烟气温度、蒸汽流量和温度下,各个界面热流密度的变化情况。通过回归分析得到了热流密度与管道内壁侧氧化层厚度和运行时间的关系表达式,即热流密度的评估关系式。The changes of the heat fluxes on interfaces of the superheater/reheater tubes with different tube geometries,flue gas temperatures,steam flows and temperatures were analyzed using the established numerical model and the corresponding program.The relationship expressions of the heat flux versus the tube imner-wall oxide scale thickness and operation time were obtained by regression analyses.The results provide a theoretical basis for the design and operation of the power plant.

关 键 词：动力机械工程 锅炉过热器 再热器 热流密度 氧化层 运行时间 评估 

分 类 号：TK224.9[动力工程及工程热物理—动力机械及工程]