原子能科学技术2025，Vol.59Issue(3)：625-633,9.DOI:10.7538/yzk.2024.youxian.0448
多区非平衡汽-气稳压器模型开发与验证
Development and Validation of Multi-zone Non-equilibrium Steam-gas Pressurizer Model
朱俊志 1屈漕卿 2时维立 1杨珏 1苟军利 2樊杰 2方宇坤 1黄凯1
作者信息
- 1. 中广核研究院有限公司,广东深圳 518031
- 2. 西安交通大学核科学与技术学院,陕西西安 710049
- 折叠
摘要
Abstract
The advanced integrated small reactor adopts steam-gas pressurizer with simple structure and pressure self-stabilizing ability.In order to study the thermo-hydraulics characteristics of steam-gas pressurizer,a steam-gas pressurizer model based on multi-zone non-equilibrium state was established.The multi-zone non-equilibrium steam-gas pressurizer model consists of three parts:liquid zone,saturated zone and gas(steam)zone,and each zone could be further divided into several control volumes.From the point of view of mass and energy conservation,the important thermodynamic and hydraulic phenomena in pressurizer,such as volume evaporation,volume condensation and wall heat transfer,were described.By assuming that the volume evaporation and condensation come from the rise of bubbles and the fall of condensate,the volume evaporation models and volume condensation models were established,and considering the influence of nitrogen on the heat exchanger process in the gas(steam)zone,the wall heat exchange model was modified by empirical relation to ensure that the heat exchange process could be accurately simulated,furthermore the discrete solution method of the steam-gas pressurizer governing equation was proposed.The calculated values of the steam-gas pressurizer model were compared with the boosting experimental results of the steam-gas pressurizer with different nitrogen fractions(3.2%,9.7%,20%)of Massachusetts Institute of Technology(MIT).The results show that,in the boosting stage,the multi-zone non-equilibrium steam-gas pressurizer model can accurately simulate the pressure response characteristics.The maximum relative error between the multi-zone non-equilibrium steam-gas pressurizer model calculated pressure value and the experimental value is about 1.93%under the 9.7%nitrogen fraction case,and about 1.60%under the 3.2%nitrogen fraction case,and 3.80%when the model calculates the pressure value and the experimental value under the 20%nitrogen fraction case.In the condensation and depressurization stage,the relative error between the calculated value and the experimental value increases due to the influence of nitrogen on the heat exchange condensation of the wall,but the relative error between the model calculated value and the experimental value of different nitrogen fraction cases is within 9%.On the whole the developed steam-gas pressurizer model can accurately predict the pressure response of pressurizer and can be used to analyze the pressure stabilization characteristics of steam-gas pressurizer.关键词
汽-气稳压器/多区非平衡/模型开发/验证Key words
steam-gas pressurizer/multi-zone non-equilibrium/model development/validation分类
能源科技引用本文复制引用
朱俊志,屈漕卿,时维立,杨珏,苟军利,樊杰,方宇坤,黄凯..多区非平衡汽-气稳压器模型开发与验证[J].原子能科学技术,2025,59(3):625-633,9.
