电站凝汽器壳侧和管侧动态耦合数学模型  

Dynamic Coupling Mathematical Model for Shell-side and Tube-sideof Power Station Condensers

作　　者：姚永灵[1] 徐啸虎[2] 徐斌[1] 张泰岩 胥建群[2] YAO Yong-ling;XU Xiao-hu;XU Bin;ZHANG Tai-yan;XU Jian-qun(Jiangsu Frontier Electric Power Technology Company Limited,Nanjing 211102,China;School of Energy and Environment,Southeast University,Nanjing 210096,China)

机构地区：[1]江苏方天电力技术有限公司,南京211102 [2]东南大学能源与环境学院,南京210096

出　　处：《汽轮机技术》2020年第5期335-338,共4页Turbine Technology

摘　　要：在冷却管传热微元方程基础上,采用解析和集总相结合的方法,建立了一种新的凝汽器动态数学模型;通过在控制方程中包含壳管两侧温度动态项,实现两侧温度的动态耦合,提高了模型的动态精度;将壳侧空间分为凝结区和热井区,同时考虑饱和汽水工质对两侧温度动态过程的影响,使得模型更符合实现动态过程;仿真对比和现场试验结果也验证了新模型的合理性和准确性。Based on differential heat transfer equations for cooling tubes,a novel dynamic mathematical model for a condenser is developed by using both analytical and lumped methods.By including the dynamic terms for the temperatures of both the shell-side and the tube-side in the control equations,the dynamic coupling of the temperatures is realized,and the dynamic accuracy of the model is improved.In the process of modeling,the shell-side is divided into two regions,including a condensation region and a condensate-sump region,and the influence of saturated steam-water qualities is also considered,which made the model more practical.The rationality and accuracy of the new model were verified by the results of simulation comparison and field experiment.

关 键 词：凝汽器 耦合数学模型 动态数学模型 动态传热量 电站仿真 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]