NUMERICAL CALCULATION OF HEAT TRANSFER DISTRIBUTION IN A 600MWe SUPERCRITICAL CIRCULATING FLUIDIZED BED BOILER
The water wall heat transfer and heat flux distribution in a 600MWe supercritical CFB boiler with water-cooled panel in the furnace was numerically studied. The water wall was made of smooth tube membrane. The solid suspension density ρ, heat flux q and heat transfer coefficient K distribution in the furnace were predicted at rated boiler load (100％BMCR), 75％ of turbine heat acceptance load (75％ THA) and 50％ THA. The results show that for a large-scale CFB boiler, the convection is the main part of heat transfer in the lower furnace, and radiation is the main in the upper lower. The ρ, q and K have the similar axial and radial distributions. Their radial distributions depend on the position of the water wall and boiler load, and show a peak value in the corner. The ρis a sensitive to K. With increasing of the height in furnace, ρdecreases, thereby the q and K decrease. The radial distributions of q and K are similar at different height. The study shows that the three-dimensional model is valid to predict the heat transfer in the furnace of the 600MWe supercritical CFB boiler.
wing wall supercritical CFB boiler 600MWe heat transfer distribution
Y.Li W.K.Li Y.X.Wu H.R.Yang L.Nie S.S.Huo
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Ther Dongfang Boiler Group Co.Ltd., Zigong, China
国际会议
第20届国际流化床燃烧会议(20th International Conference on Fluidized Bed Combustion)
西安
英文
786-791
2009-05-18（万方平台首次上网日期，不代表论文的发表时间）