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以火电厂冷却塔相关理论为基础,借助Fluent模拟软件,建立了某1 000MW机组湿式自然通风冷却塔的三维传热传质模型,采用离散相模型分析了循环冷却水的流动与热力特性,模拟了冷却塔内部气水流场及其传热过程.结果表明:在雨区加装斜面挡风墙可使外界部分空气直接进入中心区域与冷却水发生传热,改善了冷却塔的传热效率;且当加装与竖直方向呈30°夹角的斜面挡风墙附加外围导流板时,出塔水温最低,比加装十字挡风墙的冷却塔出塔水温降低了0.96K.
Based on the theory of thermal power plant cooling tower, a three-dimensional heat and mass transfer model of a 1 000 MW unit wet natural draft cooling tower was established by using Fluent simulation software. The discrete phase model was used to analyze the flow and thermal characteristics of circulating cooling water. The flow field of air and water inside the cooling tower and the heat transfer process are analyzed.The results show that installing a ramp wind wall in the rain area can make the outside air directly enter the central area to transfer heat with the cooling water and improve the heat transfer efficiency of the cooling tower ; And when installing a peripheral wind deflector with a bevel wind shielding wall at an angle of 30 ° to the vertical direction, the temperature of the water discharged from the tower is the lowest, which is 0.96K lower than that of the cooling tower with the cross wind wall installed.