摘要
自然通风间接空冷塔的冷却性能直接关系到机组运行的经济性和安全性,为了更加直观、全面地描述空冷塔运行状态和冷却性能,针对某1 000 MW机组间接空冷系统,提出空冷塔冷却幅高的概念,建立理论计算模型,结合现场实测和机组运行数据,研究了环境条件及机组运行参数对冷却幅高的影响规律,通过对比实测冷却幅高与实测工况参数无风条件下冷却幅高计算值,分析了环境风对间接空冷塔冷却性能的影响。结果表明:冷却幅高随环境温度的升高而减小,随进水温度的升高而增大;环境风条件下,主导风向迎风面扇区的冷却幅高低于侧风面扇区。研究结果可为间接空冷系统防冻运行调控、空冷散热器管束清洗和间接空冷塔冷却性能的评价和改善提供依据。
The cooling performance of natural draft dry cooling tower(NDDCT) is directly related to the economy and safety of the power-generating units. To describe the running status and cooling performance of NDDCT more intuitively and comprehensively, based on an indirect dry cooling system for one 1 000 MW unit, the cooling approach of dry cooling tower is introduced and a theoretical calculation model was proposed. With the combination of field measurement and unit operation data, the influence of environment meteorological conditions and operation parameters on the cooling approach was studied, and the effect of ambient crosswind on the cooling performance of NDDCT was analyzed by comparing the measured cooling approach and the calculated cooling approach under the tested working conditions without crosswind. Results show that the cooling approach decreases with the increase of ambient temperature and increases with the increase of inlet water temperature. Under ambient crosswind conditions, the windward sector cooling approach at the dominant wind direction is lower than that cooling sector at tower lateral. This study could provide good basis for the anti-freezing operational regulation of NDDCT, the radiator bundle cleaning and the cooling performance evaluation and improvements for NDDCT.
作者
韩华锋
陈庆杰
赵元宾
王立东
秦春营
李文东
HAN Huafeng;CHEN Qingjie;ZHAO Yuanbin;WANG Lidong;QIN Chunying;LI Wendong(Guodian Zheneng Ningdong Power Generation Co.,Ltd.,Yinchuan 750408,Ningxia Hui Autonomous Region,China;Jinan Lanchen Energy Technology Co.,Ltd.,Jinan 250101,Shandong Province,China;School of Energy and Power Engineering,Shandong University,Jinan 250061,Shandong Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2021年第6期2212-2221,共10页
Proceedings of the CSEE
基金
国家自然科学基金项目(51606112)
国家能源集团科技创新类项目(GJNY-20-06)。
关键词
自然通风间接空冷塔
冷却性能
冷却幅高
环境风
评价指标
natural draft dry cooling tower
cooling performance
cooling approach
ambient wind
evaluation index
作者简介
韩华锋(1969),男,硕士,研究方向为电力企业管理创新及节能环保技术,hhf98890@sina.com;通讯作者:赵元宾(1981),男,博士,副教授,从事高效空冷及其系统智能控制,zhyb@sdu.edu.cn。
