空冷单元加装弯叶式导流板的数值研究  

Numerical study of the air cooled unit with curvifoliate deflectors

作　　者：程友良[1] 张宁[1] 史亚骏 汪辉[1] 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定071003

出　　处：《节能》2017年第1期42-46,共5页Energy Conservation

摘　　要：空冷单元换热面的最高温度直接影响着空冷单元的安全长久使用,同时也标志着其换热效果。针对直接空冷凝汽器空冷单元典型结构中所存在的局部高温问题,以龙山电厂600MW机组的模型为例,在空冷单元内部加装弯叶式导流板,对加装不同形式和位置导流板下的空冷单元流场和温度场进行了数值模拟研究,并与原空冷单元模型和已有的加装弓形导流板的空冷单元模型进行比较,得到了较为理想的结果,为直接空冷单元结构的改进优化提供了参考依据。The highest temperature of the air cooled unit directly affects the long-time safety of the unit,and it is also a symbol of the heat transfer efficiency. In order to decline the local high temperature at the outlet of heat exchanger of the typical direct air cooled condenser unit,we established a model of deflectors,taking the Long-shan power plant 600 MW air cooled unit as example. And the numerical simulations of the air cooled unit with different curvifoliates and arrangement were conducted. The result was desirable and it was compared with the results of the direct air cooled condenser units without and with bow-shaped deflectors. This can be considered as a reference for the optimal designing of the structure of air-cooled cell.

关 键 词：直接空冷单元 导流板 对比分析 流动传热特性 数值模拟 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]