空冷岛加装挡风网对凝汽器换热效率的影响  

Influences of Windshield around Air-Cooled Island on Condenser Heat Transfer Efficiency

作　　者：周兰欣[1] 王晓斐[1] 吴瑞康[1] 

机构地区：[1]电站设备状态监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》2014年第1期88-92,共5页Electric Power Construction

摘　　要：利用CFD数值模拟Fluent软件,以某600 MW直接空冷机组为例,模拟环境风对空冷凝汽器换热效率的影响,提出在空冷岛周围加装不同形式挡风网的方案。模拟计算结果表明：加装挡风网后,在大风条件下,热风回流和＂倒灌＂现象均减弱,空冷单元空气流量增加;在环境风速为0~12 m/s的情况下,机组凝汽器平均换热效率可达到72.52%,比不加挡风网时高24.51%。Taking a 600 MW direct air-cooling unit as an example,the influence of environmental wind on the heat transfer efficiency of air-cooled condenser was numerically simulated by using CFD software（ Fluent）,and the schemes of different windshields installed around the air cooling platform were put forward. The calculation results show that the installation of windshield can reduce the influence of hot air recirculation and the‘intrusion’phenomenon,as well increase the air flow in air cooling unit and the average heat transfer of condenser,which can be up to 72. 52% and 24. 51% higher than that without windshield,under 0 m / s- 12 m / s environmental wind speed.

关 键 词：直接空冷机组 凝汽器 挡风网 数值模拟 换热效率 

分 类 号：TM621[电气工程—电力系统及自动化]