| 直接空冷机组凝汽器加装下挡风墙的数值模拟 |
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| 引用本文： | 周兰欣,李建波,李卫华,田亚钊.直接空冷机组凝汽器加装下挡风墙的数值模拟[J].动力工程,2008,28(5). |
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| 作者姓名： | 周兰欣 李建波 李卫华 田亚钊 |
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| 作者单位： | 1. 华北电力大学,电站设备状态检测与控制教育部重点实验室,保定,071003
2. 国电电力大同发电有限责任公司,大同,037043 |
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| 摘 要： | 利用CFD软件对某300 MW机组空冷岛的换热进行了数值模拟,分析了不同风速对直接空冷凝汽器换热效率的影响,提出在空冷岛上加装下挡风墙,以减小热风回流对空冷岛换热的影响.计算结果表明:随着环境风速的增加,热风回流量也增大,换热效率随之降低;加设10 m下挡风墙后,空冷平台总的换热效率提高了13%以上.
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| 关 键 词： | 工程热物理 空冷岛 挡风墙 热风回流 数值模拟 |
Numerical Simulation of Direct Air Cooling Units' Condenser Added Lower Windbreak |
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| ZHOU Lan-xin,LI Jian-bo,LI Wei-hua,TIAN Ya-zhao.Numerical Simulation of Direct Air Cooling Units' Condenser Added Lower Windbreak[J].Power Engineering,2008,28(5). |
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| Authors: | ZHOU Lan-xin LI Jian-bo LI Wei-hua TIAN Ya-zhao |
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| Abstract: | The heat exchange of the 300 MW unit's air cooling island was numerically simulated using the software of CFD.The effects of the different wind speeds on the heat exchange efficiency of the direct air cooled condensers were analyzed.The idea of adding the lower windbreak around the air cooling platform was put forward to reduce the influence of hot air recirculation on heat exchange of the platform.The calculation results show that the quantity of hot air recirculation increase with the increase of the ambient wind speed,while the efficiency of the heat exchange reduce.The total heat exchange efficiency of the air cooling platform was enhanced by 13% after adding a lower windbreak with a height of 10 m. |
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| Keywords: | engineering thermophysics air cooling island windbreak hot air recirculation numerical simulation |
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