山东电力技术2025，Vol.52Issue(3)：86-96,11.DOI:10.20097/j.cnki.issn1007-9904.2025.03.010
局部配水对高位收水冷却塔防冻节能特性影响的数值研究
Numerical Study on the Effect of Local Water Distribution on the Anti-freezing and Energy-saving Characteristics of High Cooling Tower
摘要
Abstract
In order to improve the antifreeze and energy-saving characteristics of high level water collecting natural draft wet cooling tower under low load conditions in winter,a six-region individually controllable local water distribution scheme is proposed based on a"two-machine-one-tower"high cooling tower in China.A three-dimensional numerical calculation model is established,which is applied to the local water distribution of the high cooling towe.The effects of different local water distribution methods on the water temperature distribution and the air flow velocity of the air inlet on the windward side of the high cooling tower are investigated.Combined with the ambient temperature and the wind speed,the anti-freezing and energy-saving characteristics of the high cooling tower operating in winter under local water distribution are analyzed.The results show that:The implementation of local water distribution can markedly enhance the antifreeze characteristics of the high cooling tower,and reduce the deviation of water temperature at the bottom of the fill.The local water distribution method of the high cooling tower is changed from outer ring to 1/2 and 1/4 outer ring water distribution,and the minimum water temperature at the bottom of the filler gradually increased from-2.93℃to 6.83℃and 10.85℃,and the deviation between the average and minimum water temperature is always about 2℃;under the local water distribution,especially under 1/4 outer ring water distribution,the rapidly increasing minimum water temperature in the distribution area is beneficial to flexible control of anti-freezing on the windward side of the high cooling tower under winter conditions.As the ambient temperature decreased from 0 to-5℃and-10℃in turn,the average water temperature at the bottom of the filler decreased by 3.47℃and 4.44℃in turn.Affected by the environmental crosswind,the water temperature deviation at the bottom of the filler is increased,and the anti-freezing performance of the high cooling tower is deteriorated:As the ambient wind speed increased from 0 to 5 m/s and 10 m/s,the minimum water temperature at the bottom of the fill is reduced by 2.81℃and 2.42℃in turn;under the wind speed of more than 5 m/s,the deviation between the average and minimum water temperature is increased to more than 8℃.关键词
高位收水冷却塔/局部配水/防冻/节能/数值模拟Key words
high level water collecting cooling tower/local water distribution/anti-freezing/energy-saving/numerical simulation分类
动力与电气工程引用本文复制引用
杨利,李旋,李禹江,韩强,张智慧,赵元宾..局部配水对高位收水冷却塔防冻节能特性影响的数值研究[J].山东电力技术,2025,52(3):86-96,11.基金项目
山东省科技型中小企业创新能力提升工程项目(2022TSGC1026).Shandong Province Science and Technology Small and Medium-sized Enterprise Innovation Ability Promotion Project(2022TSGC1026). （2022TSGC1026）
