氧化膜的生长对管壁温度和氧化膜温度的影响  

Effect of Oxide Film Growth on Tube Wall and the Film Temperatures

作　　者：赵志渊[1] 徐鸿[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：《动力工程学报》2011年第5期330-335,346,共7页Journal of Chinese Society of Power Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(NO.09QX61);北京市教育委员会学科建设与研究生教育建设资助项目(X90017)

摘　　要：管壁温度是评估电站锅炉受热面的热效率和锅炉安全运行的重要参数,根据传热学理论并利用L-M经验公式对管道的传热过程进行了研究,建立了具有氧化膜的受热面管道传热的数值模型,并对某再热器管道的传热过程进行计算,得到了管道各个界面温度与氧化膜厚度随着管道运行时间的变化趋势,定量地解释了管道各个界面温度随时间增长的原因,提出了氧化膜增长的敏感系数.Wall temperature is an important parameter to the assessment of both thermal efficiency of heat surface tubes and operation safety of the power plant boiler.By studying relevant heat transfer processes and L-M formula,a heat transfer model was established for tubes with oxide scales,with which calculations were performed to heat transfer processes of a certain reheater＇s tubes,so as to obtain the law governing the variation of each interface temperature and oxide film thickness varying with the service time of tubes.Causes leading to temperature variation of various interfaces have been quantitatively explained,while their sensitivity coefficients to the growth of oxide scales put forward.

关 键 词：锅炉 管壁温度 氧化膜 厚度 传热 

分 类 号：TK224.9[动力工程及工程热物理—动力机械及工程]