“三塔合一”技术中间接空冷系统性能的CFD模拟研究

孟德润; 张宏博; 张晴

doi:10.13205/j.hjgc.202511013

“三塔合一”技术中间接空冷系统性能的CFD模拟研究

doi: 10.13205/j.hjgc.202511013

孟德润^1,2,
张宏博^3, ,,
张晴¹

1. 福思力智科技(北京)有限公司, 北京 100020;
2. 海南科技职业大学, 海口 571126;
3. 中国大唐集团科技创新有限公司, 河北雄安 071800

详细信息

作者简介:
孟德润，男，博士，高级工程师，主要从事节能环保领域设计研究工作。dem@forcetechnology.com

通讯作者:
张宏博（1983—），男，高级工程师，主要从事节能环保和储能相关技术的研发设计工作。13366054830@163.com

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出版历程
- 收稿日期: 2023-04-11
- 录用日期: 2023-05-30
- 修回日期: 2023-05-12
- 网络出版日期: 2026-01-09

CFD simulation on indirect dry cooling towers of an incorporate three-tower system

1. FORCE Technology (Beijing) Co., Ltd., Beijing 100020, China;
2. Hainan Vocational University of Science and Technology, Haikou 571126, China;
3. China Datang Group Technology Innovation Co., Ltd., Xiongan 071800, China

摘要

摘要: 间接空冷、脱硫与排烟功能一体的“三塔合一”技术，近年来在我国火电行业，尤其是西北缺水地区得到了快速发展，其兼具节水、节能和环保优势。但对于1000 MW机组且间冷塔高度接近200 m的大型超高冷却塔，国内外尚无成熟的运行经验。由于2个间冷塔体积较大，而且两塔之间距离较近，其相互之间及周围高大建筑对其性能的影响无相关经验参考，故采用数值模拟的方法来对其进行计算。通过数值模拟方法对2×1000 MW机组空冷系统进行了详细计算，分析了夏季不同风向、风速的环境风，周围高大建筑以及间冷塔之间对塔内空气流场及散热器热力性能以及对机组安全性的影响。结果表明：环境风对空冷系统塔内空气流场和温度场有较大影响，不同风速、风向对间冷塔的散热性能影响是不同的。风速>16 m/s后，塔内散热器高度区域会产生涡流甚至局部穿透流，周围高大建筑在特定风向下会对间冷塔会产生一定的保护作用，2个因素都会影响空冷散热器的散热性能。在夏季极端工况下，机组背压上升，其最高可以达到32.2 kPa，但依然低于机组预警背压48 kPa，在可控范围内，机组可安全运行。
- 三塔合一 /
- 数值模拟 /
- 间接空冷塔
Abstract: The incorporation technology， the three-tower system of indirect dry cooling tower， FGD， and exhaust flue gas stack in power plants has developed rapidly， especially in Northwest China. It has advantages including energy saving， water saving， and environmental protection. But there is no operating experience of the three-tower system for 1000 MW power plants and cooling towers higher than 200 m. Due to the large volume of the two air cooling towers and their close proximity， there is no relevant practical experiences on their mutual impact and surrounding tall buildings’ impact on their performance. Therefore， numerical simulation methods were proposed. Through numerical simulation， a detailed calculation was conducted on the air cooling system of a 2×1000 MW unit， to analyze the impacts of winds with different directions and speeds in summer， surrounding tall buildings， and cooling tower spacing on the airflow field inside the tower and the thermal performance of the radiator， as well as the safety of the unit. The results indicated that the wind affects the airflow velocity and temperature distribution inside the cooling tower obviously， different wind speeds and directions had different influences on heat transfer， and there will be reverse flow and penetrating flow when the wind speed was higher than 16 m/s； the surrounding tall buildings also had some protective effect for the cooling towers； both will affect the heat transfer and the flue gas exhaust. Under the extreme condition， the back pressure of the boiler raised， the maximum back pressure was 32.2 kPa， which was still lower than the warning limit value of 48 kPa， and within the controllable range， then the boiler can operate safely.
- incorporate three-tower system /
- numerical simulation /
- indirect dry cooling tower

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参考文献(15)

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