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Study on exhaust performance of natural draft tower of direct-air-cooling condenser under low-temperature and low-load conditions
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Lan LYU1, Yingzhe YANG1, Wengang NING2, Xinqiang MA1, Jingyi SHEN1, Guodong LIU2
Thermal Power Generation | 2025, 54(12) : 115 - 124
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Thermal Power Generation | 2025, 54(12): 115-124
• Thermal energy science research •
Study on exhaust performance of natural draft tower of direct-air-cooling condenser under low-temperature and low-load conditions
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Lan LYU1, Yingzhe YANG1, Wengang NING2, Xinqiang MA1, Jingyi SHEN1, Guodong LIU2
Affiliations
  • 1.Northwest Electric Power Design Institute Co., Ltd., China Power Engineering Consulting Group, Xi’an 710075, China
  • 2.Shaanxi Yulin Energy Group Yang Huopan Coal-Electric Power Co., Ltd., Shenmu 719316, China
Published: 2025-12-25 doi: 10.19666/j.rlfd.202510039
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The distribution characteristics of the air flow field inside the natural-draft direct-air-cooling exhaust tower under low-temperature and low-load operating conditions still remain unclear. There is an urgent need to study its variation laws and propose effective measures to ensure exhaust performance and anti-freezing safety. Through the computational fluid dynamics (CFD) numerical simulation, the flow and temperature fields inside the tower at ambient temperatures of –21 ℃ and –30 ℃, and at different wind speeds are analyzed. The results indicate that, based on the symmetrical operation of steam isolation valves for sector switching of the air-cooled condenser, using louvers to regulate airflow in isolated sectors can effectively optimize the internal airflow field, ensure smooth exhaust under low-temperature conditions in winter, and significantly reduce the risk of localized freezing. Field tests verified that this measure can reduce the unit backpressure by approximately 2 kPa and improve the flue gas flow deviation.

natural-draft direct air-cooled exhaust tower  /  low temperature  /  low load  /  exhaust performance  /  bypass window-shades
Lan LYU, Yingzhe YANG, Wengang NING, Xinqiang MA, Jingyi SHEN, Guodong LIU. 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 , 54 (12) : 115 -124 . DOI: 10.19666/j.rlfd.202510039
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Year 2025 volume 54 Issue 12
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Article Info
doi: 10.19666/j.rlfd.202510039
  • Receive Date：2025-10-15
  • Online Date：2026-01-13
  • Published：2025-12-25
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  • Received：2025-10-15
Affiliations
    1.Northwest Electric Power Design Institute Co., Ltd., China Power Engineering Consulting Group, Xi’an 710075, China
    2.Shaanxi Yulin Energy Group Yang Huopan Coal-Electric Power Co., Ltd., Shenmu 719316, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202510039
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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