抽气器出力不足对凝汽器真空的影响  

The Influence of Insufficient Output of Air Extractor Upon Condenser Vacuum

作　　者：周兰欣[1] 付文锋[1] 白中华[1] 李富云[1] 

机构地区：[1]华北电力大学能源与动力工程学院,河北保定071003

出　　处：《汽轮机技术》2008年第1期46-48,共3页Turbine Technology

摘　　要：凝汽器内真空的稳定,需要凝汽器和抽气器的联合工作,抽气器的运行状态对凝汽器真空具有相当大的影响。抽气器出力不足而引起的空气在凝汽器内积聚,使得凝汽器端差和空气分压力均增大,对凝汽器真空造成双重影响。目前国内许多电厂抽气系统老化或设计不合理,大多数机组存在提高真空的潜力,认清抽气器出力不足给凝汽器真空带来的影响,对凝汽器运行、抽气设备设计选型和电厂节能分析都具有重要意义。The stabilization of condenser vacuum due to the collaboration of condenser and air extractor, the running status of air extractor is influential to condenser vacuum. Air accumulation in the condenser owing to insufficient output of air extractor can increase the terminal temperature difference and the air pressure component. So it has dual influence to condens- er vacuum. At the present time, many air extractors are aging or illegitimate and most of them have potential to enhance the vacuum. It is very significative to see clearly the influence of insufficient output of air extractor upon condenser vacuum for condenser operation, designing and selecting air extractor and energy conservation.

关 键 词：抽气器 空气积聚 凝汽器 端差 真空 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]