摘要
锅炉炉膛辐射热负荷测量及分布规律的研究可为蒸发受热面及节流孔设计提供必需的数据。提出了炉膛热负荷测量数据的处理方法，将测得的热负荷数据转换成相对于蒸发受热面平均热负荷的分配不均系数，该系数是炉膛相对高度的函数，它的多项式回归模型不仅要使误差平方和达到最小，而且根据平均热负荷的定义，多项式系数还要满足给定的等式约束。对于采用普通燃烧技术和空气分级燃烧技术的两类燃煤锅炉，利用该回归模型拟合炉膛辐射热负荷数据，得到不同的分布规律，并与某300MW锅炉炉膛热负荷测量数据进行了对比；这种以最小二乘法为基础的改进回归模型既满足了回归变量的内在联系，又对测量数据进行了最佳逼近。
Design of evaporative heating surface and restriction orifices benefit from measurements and investigations of furnace radiant heat fluxes in coal-fired boilers. A new method of heat fluxes data processing is proposed, the heat fluxes data are converted into fluxes factors basing on the average heat flux of the furnace surface, the heat fluxes factor is a function of relative height of furnace, and in it＇ s polynomial regression model, ensuring the sum of squared erro~ to the minimum is as important as meeting the equality constraint of polynomial coefficients according to the definition of the average heat flux. An improved version of polynomial regression model based on the least squares method is presented accordingly, engineers constantly have similar needs in other problems. The improved regression model was used to analyze furnace heat fluxes data for two types of coal-fired boiler with ordinary combustion technology and air-staged combustion technology. This new regression model based on the least squares method fit the data optimally to meet the intrinsic link between the regression variables.
出处
《计量学报》
CSCD
北大核心
2014年第5期440-444,共5页
Acta Metrologica Sinica
