Study on exhaust performance of natural draft tower of direct-air-cooling condenser under low-temperature and low-load conditions

吕兰; 杨迎哲; 宁文刚; 马欣强; 沈婧怡; 刘国栋

doi:10.19666/j.rlfd.202510039

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Study on exhaust performance of natural draft tower of direct-air-cooling condenser under low-temperature and low-load conditions

更新时间：2026-01-21

- Study on exhaust performance of natural draft tower of direct-air-cooling condenser under low-temperature and low-load conditions
- Thermal Power Generation Issue 12, Pages: 115-124(2025)
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- DOI：10.19666/j.rlfd.202510039
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- Published：2025
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吕兰, 杨迎哲, 宁文刚, et al. Study on exhaust performance of natural draft tower of direct-air-cooling condenser under low-temperature and low-load conditions[J]. Thermal Power Generation, 2025, (12): 115-124.
DOI：

吕兰, 杨迎哲, 宁文刚, et al. Study on exhaust performance of natural draft tower of direct-air-cooling condenser under low-temperature and low-load conditions[J]. Thermal Power Generation, 2025, (12): 115-124. DOI： 10.19666/j.rlfd.202510039.

摘要

自然通风直接空冷排烟塔在低温低负荷工况下塔内空气流场分布特性尚不明确，亟需研究其变化规律并提出有效措施以保障排烟性能与防冻安全。基于计算流体动力学（computational fluid dynamics

CFD）数值模拟，分析了环境温度–21、–30℃及不同风速下塔内流场与温度场分布。研究结果表明：在对称操作蒸汽隔离阀进行空冷凝汽器扇区投撤的基础上，采用百叶窗旁通对隔离扇区进行调风，可有效优化塔内空气流场，提升低温条件下排烟顺畅性，并显著降低局部结冰风险。现场试验验证了该措施可使机组背压降低约2 kPa，并改善烟气偏流。

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references

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