厂区布置对钢塔自然通风空冷凝汽器性能的影响  

Influence of Plant Arrangement on the Characteristics of Direct Air Cooled Condenser under Natural Draft of Steel Tower

作　　者：石磊[1] 汪建平 余喆 沈栋 张丽 SHI Lei;WANG Jian-ping;YU Zhe;SHEN Dong;ZHANG Li(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Jiangsu Shuangliang Cooling System Co.,Ltd.,Jiangyin 214444,China)

机构地区：[1]北京交通大学土建学院,北京100044 [2]江苏双良冷却系统有限公司,江阴214444

出　　处：《汽轮机技术》2024年第4期279-282,共4页Turbine Technology

摘　　要：利用计算传热学(NHT)软件FLUENT,在自然通风状态下,对2×350MW机组钢结构外覆铝板冷却塔及直接空冷凝汽器(DACC)的流动和换热性能进行了数值模拟、分析和研究。确定了考核工况,不同环境风向下,周边建筑物对DACC和钢塔性能的影响。结果表明,两机一塔水平矩形布置方式下,平行于A列的来风对钢塔通风和DACC换热有负面影响。不考虑风向频率时,各风向下周边建筑物对DACC总体换热影响约为2.4%。在电厂总平面布置时,应尽量使厂区主导风向避开不利风向,汽机房空冷塔间距还需综合其它因素确定。Using the numerical heat transfer(NHT)software FLUENT,the flow and thermal characteristics of direct air-cooled condenser(DACC)installed horizontally inside aluminum-clad steel structured cooling tower under natural draft for a 2×350MW unit is simulated,analyzed and researched.Under performance assessment condition,the influence of different wind directions and building configurations on the airflow rate and heat transfer rate of DACC in the dry cooling aluminum-clad steel tower are determined.The results show under two units with one tower configuration,winds parallel with turbine A column have negative effect on tower draft and DACC heat exchange when DACC is horizontal rectangular arranged inside the tower.Without consideration of wind direction frequency,the total difference on heat transfer among three DACC schemes is within 2.4%under all wind directions.As for the plant layout,it is recommended that local prevailing wind direction should be avoided the unfavorable wind directions.The distance between turbine house and cooling tower should be determined according to other engineering factors.

关 键 词：直接空冷凝汽器 钢塔 布置方式 自然通风 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]