空冷单元内外空气流场重构对其系统冷却性能的影响

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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空冷单元内外空气流场重构对其系统冷却性能的影响

热力发电 2025年54卷第11期页码：151-160

热能科学研究 | 更新时间：2026-08-11

- 空冷单元内外空气流场重构对其系统冷却性能的影响
- 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：
  
  山东省科技型中小企业创新能力提升工程（2022TSGC1026）~~
- DOI：10.19666/j.rlfd.202502026
  中图分类号： TM621
- 纸质出版：2025
- 稿件说明：
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[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

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