Study on Radiant Heat Fluxes Fitting Algorithm in Furnace of Utility Boiler
LIU Fu-guo1, YANG Chen-xu2
1. State Grid Shandong Electric Power Research Institute, Jinan, Shandong 250002, China；
2. Huaneng Zhanhua Cogeneration Go Ltd, Binzhou, Shandong 256800, China
Abstract：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 it5 s polynomial regression model, ensuring the sum of squared errors 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.
刘福国,杨晨旭. 锅炉炉膛热负荷分布拟合算法研究[J]. 计量学报, 2014, 35(5): 440-444.
LIU Fu-guo, YANG Chen-xu. Study on Radiant Heat Fluxes Fitting Algorithm in Furnace of Utility Boiler. Acta Metrologica Sinica, 2014, 35(5): 440-444.
[3] Mohammad A, Shamshirgaran S R. A case study： the effects of the design factors on the thermal profile of shahid rajaiee boiler [ J]. Applied Thermal Engineering, 2008,28(8) ：955 -961.
[9] Kouprianov V I. Modeling of thermal characteristics for a furnace of a 500 MW boiler fired with high-ash coal [ J ]. Energy, 2001,26 (9) ：839 -853.
[11] Taniguchi M, Yamamoto K, Kobayashi Η, et al. A reduced NO^ reaction model for pulverized coal combustion under fuel-rich conditions [ J ]. Fuel, 2002, 81 (3) ：363 -371.
[12] Pan J, Yang D, Yu H, et al. Mathematical modeling and thermal-hydraulic analysis of vertical water wall in an ultra supercritical boiler [ J ]. Applied Thermal Engineering, 2009, 29 (11) ： 2500 -2507.
[13] 张永福.锅炉参数对炉内传热的影响[J].热力发电， 2000,29(1) ：15-16.
[14] Zhang M, Bie R S, Yu Z Z, et al. Heat flux profile of the furnace wall of a 300 MWe GFB boiler [ J ]. Powder Technology, 2010, 203 (3) ：548 -554.
[15] Li Z Q, Jing J P, Liu G K, ei al. Measurement of gas species, temperatures, char burnout, and wall heat fluxes in a 200 MWe lignite-fired boiler at different loads [J]. Applied Energy, 2010, 87 (4) ： 1217 -1230.
2014, Vol. 35 
