内部导流对空冷单元喷雾增湿效果的影响  

Impact of Internal Diversion on Spray Humidification of Air Cooling Unit

作　　者：周兰欣[1] 惠雪松[1] 孙会亮[1] 马少帅[1] 尤风霞[1] 

机构地区：[1]电站设备状态检测与控制教育部重点实验室(华北电力大学),河北省保定市071003

出　　处：《电力建设》2012年第10期1-4,共4页Electric Power Construction

摘　　要：对空冷单元冷却空气进行合理导流,根据导流后的速度分布布置喷雾增湿系统,可以增强喷雾增湿的冷却效果。针对600MW直接空冷机组空冷单元的典型结构,建立了内部综合应用空气导流板和喷雾增湿的空冷单元冷却空气流动传热过程的物理数学模型。利用计算流体动力学(computational fluid dynamics,CFD)进行模拟,获得了空冷单元冷却空气的流场,比较了应用导流板前、后喷雾增湿的冷却效果。结果表明:合理应用内部导流板能够增强喷雾增湿的冷却效果,更大程度降低机组背压。The proper diversion for cooled air in air cooling unit and the arrangement of spray humidification system in accordance with the air velocity distribution can improve the cooling effect of spray humidification. Base on the typical structure of air cooling system in 600 MW direct air-cooling unit, the physical and mathematical model for heat transfer process was established for the cooled air in air cooling unit that used the air baffle and spray humidification. The flow field of cooled air in air cooling units was obtained by using computational fluid dynamics （CFD）, and the spray humidification＇ s cooling effect before and after the application of baffle was compared. The results show that the proper installation of internal diversion device can strengthen spray humidification effects, and lower the back pressure of the units to a greater extent.

关 键 词：空冷单元 导流板 喷雾增湿 数值模拟 

分 类 号：TK264.11[动力工程及工程热物理—动力机械及工程]