华电技术 ›› 2013, Vol. 35 ›› Issue (3): 16-19.

• 研究与开发 • 上一篇    下一篇

火电机组耗差分析中真空度基准值的计算分析

韩琴,许晓斌,常浩   

  1. (华电电力科学研究院,浙江杭州 310030)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2013-03-25 发布日期:2013-03-25

Calculation and analysis of vacuum base value of thermal power unit for energyloss analysis

HAN Qin, XU Xiaobin, CHANG Hao   

  1. (China Huadian Electric Research Institute, Hangzhou 310030, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2013-03-25 Published:2013-03-25

摘要: 在火电机组耗差分析中,真空度基准值通常是通过凝汽器制造厂家提供的凝汽器特性曲线拟合计算得到的,而这只适用于冷却水量、凝汽器蒸汽流量、冷却水流速以及冷却水进口温度等参数均为设计值的工况。以内蒙古华电乌达热电有限公司150MW机组为例,对采用3种计算方法得出的真空度基准值进行比较分析,分析结果表明:根据凝汽器制造厂家提供的凝汽器特性曲线拟合的基准值不能正确计算出凝汽器压力基准值,而应以凝汽器变工况下的计算值作为真空度的基准值。

关键词: 耗差分析, 基准值, 凝汽器变工况, 真空度

Abstract: In energyloss analysis of thermal power units, the vacuum base value usually obtained by fitting the curve of condenser characteristics provided by the condenser manufacturer, and this is suitable for special condition only, in which the cooling water flow, the condenser steam flow, the cooling water flow velocity, the cooling water temperature at the inlet and other parameters are all in the range of designed value. Taking the 150MW unit of Inner Mongolia Huadian Wuda Thermal Power Company Limited as example, the vacuum base values obtained by three calculation methods were analyzed and compared. The result shows that according to the base value obtained by fitting the manufacturerprovided condenser characteristics curve, it is can not calculate the condenser pressure base value, and the calculated value obtained under variable working condition of the condenser should be taken as the vacuum base value.

Key words: energy-loss analysis, base value, variable working condition of condenser, vacuum degree