Noise Prediction and Analysis of Mechanical Draft Direct Dry Cooling System

Chao CUI; Yuntao ZHAO; Wenhui HUANG; Lijun YANG

doi:10.12096/j.2096-4528.pgt.2018.068

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Noise Prediction and Analysis of Mechanical Draft Direct Dry Cooling System

Power Generation and Environment Protection | 更新时间：2025-06-06

- Noise Prediction and Analysis of Mechanical Draft Direct Dry Cooling System
- Power Generation Technology Vol. 39, Issue 5, Pages: 443-448(2018)
- 作者机构：
  
  1.中国大唐集团科技工程有限公司, 北京市海淀区 100097
  2.华北电力大学能源动力与机械工程学院, 北京市昌平区 102206
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(51476055)
- DOI：10.12096/j.2096-4528.pgt.2018.068
  CLC：
- Received：19 June 2018，
  
  Published：30 October 2018
- 稿件说明：
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Chao CUI, Yuntao ZHAO, Wenhui HUANG, et al. Noise Prediction and Analysis of Mechanical Draft Direct Dry Cooling System[J]. Power Generation Technology, 2018, 39(5): 443-448.
DOI：

Chao CUI, Yuntao ZHAO, Wenhui HUANG, et al. Noise Prediction and Analysis of Mechanical Draft Direct Dry Cooling System[J]. Power Generation Technology, 2018, 39(5): 443-448. DOI： 10.12096/j.2096-4528.pgt.2018.068.

摘要

直接空冷系统采用大型轴流风机群对汽轮机排汽进行冷却，因此直冷系统噪声成为电站主要考虑的问题之一。该文利用计算流体软件Fluent对直接空冷单元和5×6规模的空冷岛进行流场模拟和噪声预估，并模拟增加消音墙后的空冷岛流场和噪声的变化情况。流场模拟的紊流模型采用大涡模拟（large eddy simulation，LES），噪声预估采用非稳态隐式求解。结果表明，在挡风墙内侧布置多孔吸声材料对空冷岛流场基本没有影响，但是它可以有效降低整个空冷岛的噪声水平，主要是降低了低频率的噪声。

Abstract

Direct dry cooling system adopts large-scale axial flow fan group to cool exhaust steam of turbine. So the noise of direct dry cooling system becomes one of the hazards of power plants. By using computational fluid dynamics software Fluent

the simulation of flow field and noise forecast of direct dry cooling cell and system were performed in this paper. The changes of flow field and noise of ACCs (air-cooled steam condensers) were simulated after increasing the noise reduction wall. The large eddy simulation was applied to analyze the flow field. Noise forecast was proceeded by means of the unsteady and implicit solver. The results show that the porous sound-absorbing materials decorated inside the wind wall have no effect on the flow field of ACCs. But they could effectively reduce the noise level of ACCs

especially reducing the low frequency noise.

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references

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