基于热负荷均匀分配原则的直接空冷系统轴流风机转速灵活调节策略
Flexible Speed Regulation Strategy of Axial Flow Fans in Direct Dry Cooling System Based on the Principle of Uniform Distribution of Heat Load
侯一晨 1陈志董 1张宗阳 1贾贺 1王伟佳 1陈磊 1杨立军1
作者信息
- 1. 电站能量传递转化与系统教育部重点实验室(华北电力大学能源动力与机械工程学院),北京市 昌平区 102206
- 折叠
摘要
在直接空冷电站中,轴流风机功耗占厂用电比例较高.为获得更为高效的风机运行调整策略,以某典型 2×600 MW直接空冷机组为例,基于热负荷均匀分配原则,采用数值模拟方法,研究轴流风机转速灵活调节策略.获得不同环境温度和风速条件下,各轴流风机转速分布规律以及通过空冷凝汽器单元的冷却空气质量流量分布规律.最终,计算得到不同环境气象条件下不同轴流风机转速调节策略风机总功耗变化规律.结果表明,基于热负荷均匀分配原则的轴流风机转速灵活调整策略明显优于轴流风机转速整体调节策略,结果可为直接空冷机组优化运行和深层次节能提供参考.
Abstract
In direct dry cooling power plants,the axial fan power consumption accounts for a high proportion of the auxiliary power.To obtain an efficient regulation strategy,taking a typical 2×600 MW direct dry cooling unit as an example,the flexible rotational speed regulation strategy of axial flow fan is numerically studied based on the principle of uniform heat load distribution.The rotational speed distribution of axial flow fans and the cooling air mass flow rate through air cooling unit are obtained under different ambient temperature and wind speed.Finally,under different ambient conditions,the variation rules of total power consumption of axial flow fans with different regulation strategies are obtained.The results show that the flexible regulation strategy of axial flow fans based on the principle of uniform heat load distribution is obviously superior to the integral regulation strategy.Finally,the corresponding research results can provide reference for optimizing operation and deep energy saving of direct dry cooling units.
关键词
直接空冷系统/热负荷均匀分配/轴流风机转速灵活调节/数值模拟/传热传质Key words
direct dry cooling system/uniform distribution of heat load/flexible rotational speed adjustment of axial flow fans/numerical simulation/heat and mass transfer引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据