凝汽器性能的数值模拟与布管原则  

Numerical Simulation of Power Plant Condenser Performance and Roles for Tube Arrangement

作　　者：钟达文[1] 曾辉[1] 孟继安[1] 李志信[1] 

机构地区：[1]热科学与动力工程教育部重点实验室,清华大学航天航空学院,北京100084

出　　处：《工程热物理学报》2014年第1期123-127,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51036003);973项目(No.2013CB228301)

摘　　要：针对目前国内使用最为广泛的300 MW机组凝汽器,采用具有分布阻力和分布质量汇的多孔介质模型,数值研究了菱型、卵型、将军帽型、双峰型等典型布管凝汽器的性能,比较了不同布管形式凝汽器的壳侧压降和抽气量,总结出了凝汽器布管的一些基本原则,如管束外形以窄长锲型或山峰形为好、外围应设置辅助进汽通道、需要设置渐缩型空冷区等。The thermal performance of power plant condenser for 300 MW unit, widely used in China, was numerically analyzed using a porous medium model with distributed flow resistance and mass sink. Four typical tube arrangements, lozenge-shaped, egg-shaped, cap-shaped, double-peak-shaped, were considered. The shell side pressure drops and venting rates of condenser for different tube arrangements were compared, and some roles for tube arrangement were concluded, such as, the bundle profile should be wedge-shaped or double-peak-shaped, auxiliary steam inlet sub-channels and the tapered air cooling region should be designed, etc.

关 键 词：凝汽器 数值模拟 流动与传热特性 布管原则 

分 类 号：TK264[动力工程及工程热物理—动力机械及工程]