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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.
The wall temperature is an important parameter to evaluate the thermal efficiency of boiler heating surface and the safe operation of boilers. Based on the heat transfer theory and LM empirical formula, the heat transfer process of the pipeline is studied, and the heat transfer pipe with oxide film is established The numerical model of heat transfer in a reheater pipe was calculated. The trend of each interface temperature and oxide film thickness with pipe running time was obtained, and the reason why the temperature of each interface increased with time was explained quantitatively , Put forward the sensitivity coefficient of oxide film growth.