核电站单压双流程凝汽器控制容积法动态仿真模型研究

Modeling and Simulation of Single-pressure Double-flow Nuclear Power Plant Condenser Using Controlled Volume Method

凝汽器作为核电机组的重要组成部分,应当运行合理的仿真方法研究其运行特性,以提高实际机组运行效率和安全性。建立控制容积凝汽器仿真模型,可以提升仿真模型精度。本文以核电机组的单压双流程凝汽器为研究,在学习其物理特性和热力学热性之上,采用动态仿真模型容积划分手段,建立了凝汽器的控制容积动态数学模型。通过建模仿真,模拟了各种工况下凝汽器动态变化特性,模拟结果可基本吻合实验数据。通过仿真计算,得到不同控制参数阶跃情况下凝汽器的动态响应,仿真结果与实验结果吻合良好。

The condenser is a critical component that affects the efficiency and performance of nuclear power plants.In order to make the condenser work under high efficiency and security,advanced simulation methods for condensers need to be developed.Establishing high-precision simulation model of Condenser is important for the development of high-precision nuclear power engineering simulator.this thesis takes the single pressure double flow condenser commonly used in nuclear power plant as research object.Non-condensable gas is taken into consideration.On the basis of learning the structure of condenser and analyzing steam flow and heat transfer behavior of condenser,the distributed thermodynamic modeling idea is used to model and analyze numeral values.The practicability of the model is proved through working out the characteristic curve of condenser variation working-state feature.Then the dynamic response of condenser in the step change of different control parameters are worked out.the predictions from the models are compared with the experimental data and the agreement was satisfactory.