中国电力 ›› 2012, Vol. 45 ›› Issue (2): 22-25.DOI: 10.11930/j.issn.1004-9649.2012.2.22.3

• 发电 • 上一篇    下一篇

1 000 MW 直接空冷凝汽器变工况研究

韩中合1, 郑庆宇1, 吴智泉2, 王智1   

  1. 1. 华北电力大学 电站设备状态监测与控制教育部重点实验室,河北 保定 071003;
    2. 中国水利电力物资有限公司,北京 100045
  • 收稿日期:2011-08-16 修回日期:2011-12-02 出版日期:2012-02-18 发布日期:2016-02-29
  • 作者简介:韩中合(1964-),男,河北武邑人,教授,博士生导师,从事两相流计算与测量研究。

Off-design characteristics of condenser in direct air-cooling 1 000 MW unit

HAN Zhong-he1, ZHENG Qing-yu1, WU Zhi-quan2, WANG Zhi1   

  1. 1. Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education, North China Electric Power University, Baoding 071003, China;
    2.China National Water Resources &
    Electric Power Materials &
    Equipment Co., Ltd., Beijing 100045,China
  • Received:2011-08-16 Revised:2011-12-02 Online:2012-02-18 Published:2016-02-29

摘要: 以1 000 MW直接空冷机组为例,基于效能—传热单元数方法,建立了直接空冷机组凝汽器变工况数学模型。通过分析排汽管道压降及机组对环境散热量等因素对汽轮机末级排汽压力的影响,得出汽轮机末级排汽压力与环境温度、迎面风速、排汽流量间的关系曲线。分析了汽轮机末级排汽压力与其影响因素之间的线性关系,为1 000 MW空冷机组在变工况下选择合适的排汽压力和提高经济性提供参考。

关键词: 凝汽器压力, 直接空冷, 变工况, 特性曲线

Abstract: Taking 1 000 MW direct air cooling units as an example, by using the method of effective energy-heat transfer units, a mathematical model of direct air cooling units under variable operating conditions has been elaborated. By considering the influence of pressure drop of the exhaust pipe and environment heat dissipation loss on the exhaust steam pressure of the last stage in the steam turbine in direct air cooling units, the curves of condenser pressure change with environment temperature, face velocity and exhaust steam flow were obtained. The linear relationship between the exhaust steam pressure of the last stage and its influence factors was analyzed, which can provide a reference for choosing the suitable exhaust steam pressure and for improving economical efficiency under off-design operation conditions in 1 000 MW air-cooling units.

Key words: condenser pressure, direct air-cooling, off-design, characteristic curves

中图分类号: