基于环境风温-冷却水温耦合计算的间接空冷塔冬季运行及防冻研究  

Winter Operation and Anti-Freezing Research of Indirect Air-Cooling Tower Based on Coupling Calculation between Ambient Wind Temperature and Cooling Water Temperature

作　　者：康卫东 李高潮[2] 王子豪 王永进 张利 师进文[3] 韩立 KANG Weidong;LI Gaochao;WANG Zihao;WANG Yongjin;ZHANG Li;SHI Jinwen;HAN Li(Shenhua Guoneng Ningxia Yuanyang Lake Power Generation Co.Ltd,Yinchuan 750411,China;Xi’an Thermal Power Research Institute Co.Ltd,Xi’an 710054,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;SPIC Shanxi Aluminium Co.Ltd,Xinzhou 034100,Shanxi,China;Xi'an TPRI Energy Conservation Technology Co.Ltd,Xi’an 710054,China)

机构地区：[1]神华国能宁夏鸳鸯湖发电有限公司,银川750411 [2]西安热工研究院有限公司,西安710054 [3]西安交通大学动力工程多相流国家重点实验室,西安710049 [4]国家电投集团山西铝业有限公司,山西忻州034100 [5]西安西热节能技术有限公司,西安710054

出　　处：《华东理工大学学报（自然科学版）》2023年第4期474-480,共7页Journal of East China University of Science and Technology

基　　金：国家重点研发计划(2019YFB1505403)。

摘　　要：间接空冷塔是空冷发电机组的重要冷端设备,其换热性能直接影响着整个发电机组的运行情况。本文针对宁夏某电厂的双间接空冷塔系统,在Fluent软件中通过使用用户自定义函数(UDF)对其进行了环境风温-冷却水温的实时耦合计算,进而对其在冬季大风条件下的冻结风险进行研究。结果表明:耦合计算模型具有较好的精度,与各项实测数据相比误差均在5%以内。环境侧风会增加各扇段出口水温的不均匀度,主要表现为迎风扇段出口水温急剧降低。减小迎风扇段的百叶窗开度可提升其冷却水出口温度,但同时会使背风扇段出口水温骤降。当同时减小迎风与背风扇段百叶窗开度时,各扇段出口水温回升且分布更加均匀,整塔冻结风险普遍降低。Because of water saving,the indirect air-cooling tower has been widely used in thermal power generating units in North China.Indirect air-cooling tower is an important cold side equipment of air-cooling generator unit.Its heat transfer efficiency directly affects the operation of the whole generator unit.Therefore,it is important to study the factors that determine the heat transfer efficiency of indirect air-cooling tower.In particular,the ambient crosswind is known to have the greatest influence on its performance.In this research,by using user-defined function(UDF)to calculate the real-time coupling of ambient wind and cooling water temperature,the dual-indirect air-cooling tower system of a Ningxia power plant was simulated in Fluent software.Then,the freezing risk of the system was studied under strong wind conditions in winter.The results show that the coupling calculation model has superior accuracy and with an error of less than 5%comparing to the measured data.Ambient crosswind increases the unevenness of outlet water temperature of each sector,which is mainly manifested as the sharp decrease of outlet water temperature in windward sectors.Reducing the shutters’opening of the windward sectors increases the cooling water outlet temperature;however,the water temperature of the outlet in the leeward sectors decreases sharply.When the shutters’opening of windward and leeward sectors are reduced simultaneously,the outlet water temperature of each sector rises and distributes more evenly,and the freezing risk of the whole tower is generally reduced.

关 键 词：间接空冷塔 环境侧风 冷却水温 实时耦合计算 防冻 

分 类 号：TK121[动力工程及工程热物理—工程热物理]