Influence of air flow field reconstruction inside and outside the air cooling unit on cooling performance of the system

李旋; 李禹江; 韩强; 周飞; 米玉鸿; 秦春营; 赵元宾

doi:10.19666/j.rlfd.202502026

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Influence of air flow field reconstruction inside and outside the air cooling unit on cooling performance of the system

Thermal Power Generation Vol. 54, Issue 11, Pages: 151-160(2025)

更新时间：2026-08-11

- Influence of air flow field reconstruction inside and outside the air cooling unit on cooling performance of the system
- 作者机构：
  
  1. 山东电力工程咨询院有限公司
  2. 江苏省国信研究院有限公司
  3. 嘉峪关宏晟电热有限责任公司
  4. 宁夏电投永利能源有限公司
  5. 山东大学核科学与能源动力学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202502026
  CLC： TM621
- Published：2025
- 稿件说明：
移动端阅览
[1]李旋,李禹江,韩强,等.空冷单元内外空气流场重构对其系统冷却性能的影响[J],2025,54(11):151-160.
[1]李旋,李禹江,韩强,等.空冷单元内外空气流场重构对其系统冷却性能的影响[J],2025,54(11):151-160. DOI： 10.19666/j.rlfd.202502026.

DOI：10.19666/j.rlfd.202502026.

摘要

直接空冷系统作为火电机组核心的热力循环末端，其运行效能受电厂地理位置及周边环境参数的显著制约。以某电厂直接空冷系统为原型，建立空冷系统及周边建筑物、山体环境的三维数值模型，提出针对空冷岛迎风侧或换热不利单元的复合防风措施，探究适用性强、效果佳的直接空冷系统防风措施与优化机制，分析空冷单元内外空气流场重构对直接空冷系统冷却性能的影响。结果表明：直接空冷单元内部和外部防风措施的设置可有效改善机组的热力性能，风速5 m/s时，大十字墙挡风对空冷岛换热性能改善效果较好，散热器迎面风速升高了0.24 m/s，散热器表面温度降低了2.40℃；空冷单元内外空气流场重构后，直接空冷系统散热器表面平均温度最高降低5.77℃，背压最高降低2.92 kPa。空冷单元内外空气流场重构可显著改善直接空冷系统冷却效果，提高电站冷端系统的运行性能，未来直接空冷系统导流装置的优化设计可聚焦于流场均匀性改善。

Abstract

As the core of thermal power units

the operation efficiency of the direct air cooling system is significantly restricted by the geographical location of the power plant and the surrounding environmental parameters. Taking the direct air cooling system of a power plant as the prototype

a three-dimensional numerical model of the air cooling system and the surrounding buildings and mountain environment is established

and the composite wind prevention measures for the windward side of the air cooling island or the units with unfavorable heat transfer are proposed. The windproof measures and optimization mechanism of the direct air cooling system with strong applicability and good effect are explored

and the influence of air flow field reconstruction inside and outside the air cooling unit on the cooling performance of the direct air cooling system is analyzed. The results show that the internal and external wind-proof measures of the direct air-cooled unit can effectively improve the thermal performance of the unit. When the wind speed is 5 m/s

the large cross wall windshield has a good effect on improving the heat transfer performance of the air-cooled island. The frontal wind speed of the radiator increases by 0.24 m/s

and the surface temperature of the radiator reduces by 2.40 ℃. After the reconstruction of the air flow field inside and outside the air cooling unit

the average surface temperature of the radiator in the direct air cooling system reduces by 5.77 ℃

and the back pressure reduces by 2.92 kPa. The reconstruction of the air flow field inside and outside the air cooling unit can significantly improve the cooling effect of the direct air cooling system and improve the operating performance of the cold end system of the power station. In the future

the optimization design of the diversion device of the direct air cooling system can focus on the improvement of the uniformity of the flow field.

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references

李路江,杜威,王昌欣,等.利用二次回归正交试验的空冷岛挡风墙优化设计[J].机械设计与制造,2023(11):5-8.LI Lujiang, DU Wei, WANG Changxin, et al.Optimization of windbreak wall of air cooling island based on quadratic regression orthogonal methodology[J].Mechanical Design and Manufacture, 2023(11):5-8.

董建宁,安吉振,陈衡,等.考虑天气影响的火电机组空冷系统性能预测方法[J].发电技术, 2024, 45(6):1105-1113.DONG Jianning, AN Jizhen, CHEN Heng, et al.Performance prediction method for air cooling system of thermal power unit considering weather effect[J]. Power Generation Technology, 2024, 45(6):1105-1113.

孙玉庆,张新海,柴艳琴,等.直接空冷系统技术改进及能效提升研究[J].电力学报, 2023, 38(2):146-155.SUN Yuqing, ZHANG Xinhai, CHAI Yanqin, et al.Research on technical improvement and energy-saving elevating of direct air-cooling system[J]. Journal of Electric Power, 2023, 38(2):146-155.

刘九洲,王杰,万超,等.基于精细化建模的直接空冷岛侧风影响模拟研究[J].辽宁工程技术大学学报(自然科学版), 2023, 42(4):491-498.LIU Jiuzhou, WANG Jie, WAN Chao, et al. Crosswind influence simulation of direct air-cooling island based on fine modeling[J]. Journal of Liaoning Technical University(Natural Science), 2023, 42(4):491-498.

黄文慧.基于风机群流场组织的电站直接空冷系统性能优化[D].北京:华北电力大学, 2021:1.HUANG Wenhui. Performance optimization of direct dry cooling system based on flow field organization of fan array in power station[D]. Beijing:North China Electric Power University, 2021:1.

杨立军,贾宝荣,杜小泽,等.内部导流对空冷单元流动传热特性的影响[J].工程热物理学报, 2009, 30(7):1226-1228.YANG Lijun, JIA Baorong, DU Xiaoze, et al. Influence of internal flow guiding device upon flow and heat transfer characteristics in air-cooled condenser cell[J]. Journal of Engineering Thermophysics, 2009, 30(7):1226-1228.

BORGHEI L, KHOSHKHO R H. Computational fluid dynamics simulation on a thermal power plant with aircooled condenser[J]. Proceedings of the Institution of Mechanical Engineers, Part A:Journal of Power&Energy, 2012, 226:837-847.

OWEN M T F, KROGER D G. The effect of screens on air-cooled steam condenser Performance under windy conditions[J]. Applied Thermal Engineering, 2010,30(16):2610-2615.

VENTER A J, OWEN M T F, MUIYSER J. A numerical analysis of windscreen effects on air-cooled condenser fan performance[J]. Applied Thermal Engineering, 2021, 186:116416.

王金平,安连锁.直接空冷机组夏季度夏措施及发展趋势[J].山东电力技术, 2010(4):45-47.WANG JinPing, AN Liansuo. Measures and development of summer operation of directed air cooling unit[J].Shandong Electric Power, 2010(4):45-47.

李文毓.环境风对汽轮机空冷岛换热性能的影响及其改善措施[J].机械管理开发, 2022, 37(12):60-61.LI Wenyu. Influence of ambient air on heat transfer performance of air cooling island of steam turbine and its improvement measures[J]. Machinery Management and Development, 2022, 37(12):60-61.

程友良,张宁,史亚骏,等.空冷单元加装弯叶式导流板的数值研究[J].节能, 2017, 36(1):42-46.CHENG Youliang, ZHANG Ning, SHI Yajun, et al.Numerical study of the air cooled unit with curvifoliate deflectors[J]. Energy Conservation, 2017, 36(1):42-46.

呼浩,古真桢,孙林,等.导流板对某660 MW电厂空冷单元运行性能的影响及优化研究[J].节能, 2024,43(4):20-24.HU Hao, GU Zhenzhen, SUN Lin, et al. Effect of deflector on the operation performance of the air-cooled unit of a660 MW power plant and its optimization study[J].Energy Conservation, 2024, 43(4):20-24.

GAO X F, ZHANG C W, WEI J J, et al. Performance prediction of an improved air-cooled steam condenser with deflector under strong wind[J]. Applied Thermal Engineering, 2010, 30(17/18):2663-2669.

郑春波.环境风影响下直接空冷系统流动传热特性分析[D].吉林:东北电力大学, 2020:1.ZHENG Chunbo. Analysis on thermo-flow characteristics of air-cooled system under windly conditions[D]. Jilin:Northeast Electric Power University, 2020:1.

高沛.环境风对空冷岛换热性能的影响及其改善措施[D].保定:华北电力大学, 2014:1.GAO Pei. The effects of environment wind on heat transfer of direct air-cooled condenser and improving measures[D]. Baoding:North China Electric Power University, 2014:1.

严鹏航.加装导流装置的直接空冷机组结构优化研究[D].北京:华北电力大学, 2017:1.YAN Penghang. Research on structure optimization of direct air-cooled unit with flow guiding device[D].Beijing:North China Electric Power University, 2017:1.

崔超,赵允涛,黄文慧,等.外部复合导流装置对直接空冷系统流动传热特性的影响[J].汽轮机技术, 2019,61(1):17-20.CUI Chao, ZHAO Yuntao, HUANG Wenhui, et al.Influence of external composite flow guiding device upon flow and heat transfer characteristics of direct air cooling system[J]. Turbine Technology, 2019, 61(1):17-20.

李涛,阴继翔,高波,等.导流装置对直接空冷凝汽器单元空气流动与换热性能影响的数值研究[J].上海电力大学学报, 2022, 38(2):144-150.LI Tao, YIN Jixiang, GAO Bo, et al. Numerical study on the influence of deflector on air flow and heat transfer characteristics of direct air-cooled condenser unit[J].Journal of Shanghai University of Electric Power, 2022,38(2):144-150.

吴耀鹏,白国良.直接空冷体系挡风墙体型系数研究[J].西安建筑科技大学学报(自然科学版), 2014, 46(6):805-809.WU Yaopeng, BAI Guoliang. Study on the shape factor of wind-break wall of direct air-cooled system[J]. Journal of Xi’an University of Architecture and Technology(Natural Science Edition), 2014, 46(6):805-809.

张学镭,王梅梅,张耀祖,等.直接空冷凝汽器加装导流叶栅的性能分析[J].电力科学与工程, 2017, 33(6):60-66.ZHANG Xuelei, WANG Meimei, ZHANG Yaozu, et al.Performance analysis of fixing the flow guiding cascades upon direct air-cooled condenser[J]. Electric Power Science and Engineering, 2017, 33(6):60-66.

侯一晨,陈志董,张宗阳,等.基于热负荷均匀分配原则的直接空冷系统轴流风机转速灵活调节策略[J].中国电机工程学报, 2024, 44(8):3125-3137.HOU Yichen, CHEN Zhidong, ZHANG Zongyang, et al.Flexible speed regulation strategy of axial flow fans in direct dry cooling system based on the principle of uniform distribution of heat load[J]. Proceedings of the CSEE, 2024, 44(8):3125-3137.

王淼,黄骞,曹文广,等.直接空冷凝汽器流场及性能优化数值模拟[J].洁净煤技术, 2022, 28(4):66-74.WANG Miao, HUANG Qian, CAO Wenguang, et al.Numerical investigation on the flow field and performance optimization of the direct air-cooled condenser[J]. Clean Coal Technology, 2022, 28(4):66-74.

刘一帆.火电机组直接空冷系统数值模拟与运行监测研究[D].北京:华北电力大学, 2023:1.LIU Yifan. Numerical simulation and operation monitoring of direct air cooling system for thermal power units[D]. Beijing:North China Electric Power University,2023:1.

刘达,杨建国,张兆营,等.水平挡板改善直接空冷凝汽器流场特性的数值模拟[J].动力工程学报, 2011,31(12):949-954.LIU Da, YANG Jianguo, ZHANG Zhaoying, et al.Numerical simulation on flow field of direct air-cooled condenser improved by horizontal baffles[J]. Journal of Chinese Society of Power Engineering, 2011, 31(12):949-954.

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