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

更新时间：2025-11-21

- Influence of air flow field reconstruction inside and outside the air cooling unit on cooling performance of the system
- Thermal Power Generation Issue 11, Pages: 151-160(2025)
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- DOI：10.19666/j.rlfd.202502026
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- Published：2025
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李旋, 李禹江, 韩强, et al. Influence of air flow field reconstruction inside and outside the air cooling unit on cooling performance of the system[J]. Thermal Power Generation, 2025, (11): 151-160.
DOI：

李旋, 李禹江, 韩强, et al. Influence of air flow field reconstruction inside and outside the air cooling unit on cooling performance of the system[J]. Thermal Power Generation, 2025, (11): 151-160. 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。

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