摘要
基于有限元法对某电厂600 MW机组锅炉在不同超临界工况下燃烧器区膜式水冷壁的温度场进行了分析和计算.采用双线性四边形单元对水冷壁温度场进行剖分,分区段计算了向火侧的热流密度.依据水冷壁入口和出口工质的实际温度和压力,确定了管内工质温度及管内的对流换热系数,计算了超临界压力下不同工况的水冷壁温度分布,并对造成水冷壁超温的原因进行了分析.对计算结果与实测值进行了比较,误差很小.
The temperature fields of the membrane waterwall in burner zone of a 600 MW boiler under different supercritical conditions are analyzed and calculated based on finite-element method. Bilinear quadrilateral is used in meshing the temperature field of the waterwall. Heat-flux density of the fire-facing side is sectionalized and calculated. The temperature of the working medium and the heat transfer coefficient in the tube are determined based on the actual temperature and pressure of the inlet medium and outlet medium of the waterwall. The temperature distributions of the waterwall under different supercritical working conditions are calculated. The cause of waterwall overheat is analyzed. The calculated results are compared with the measured values, and the error is small.
出处
《动力工程》
CSCD
北大核心
2008年第5期677-681,共5页
Power Engineering
基金
华北电力大学重大科研项目预研基金(200513003)
关键词
能源与动力工程
超临界锅炉
膜式水冷壁
有限元
温度场
energy and power engineering
supercritical boiler
membrane waterwall） finite element
temperature field
