超临界压力下二氧化碳容器泄压影响因素研究  

Study on Factors Affecting during Carbon Dioxide Vessel Decompression at Supercritical Pressure

作　　者：王俊峰[1] 周源 黄彦平[1] 田耕源 

机构地区：[1]中国核动力研究设计院,四川 成都 [2]四川大学物理学院,四川 成都

出　　处：《核科学与技术》2021年第1期29-37,共9页Nuclear Science and Technology

摘　　要：CO2意外泄漏是超临界CO2动力循环系统主要安全问题之一。本文基于一套小规模实验装置研究超临界CO2容器快速泄压特点,压力容器体积为50.0 L。测量了不同破口尺寸(1.0~5.0 mm),初始压力(8.1~12 MPa)和初始温度(35℃~50℃)条件下超临界CO2容器泄漏过程中介质压力和温度以及质量流量,分析了容器泄漏过程中泄压特性以及参数影响机制。通过分析得到,初始温度高于和低于拟临界温度,超临界CO2容器泄压会经历不同泄压过程。初始温度低于拟临界温度,泄压时工质温度下降的更低。泄压时间主要与破口尺寸和初始压力有关。本文的实验结果对理解事故过程和验证模型具有重要意义。The accidental release is one of the main risks of supercritical carbon dioxide (S-CO2) power cycle system. In this paper, supercritical CO2 decompression experiments were studied based on a set of small-scale experimental equipment. The volume of vessel is 50 L. The pressure, temperature and mass flow rate during supercritical CO2 vessel release were measured with various leakage diameters (1.0 mm~5.0 mm), initial temperature (35˚C~50˚C) and initial pressure (8.1 MPa~12 MPa). The decompression characteristics and influence mechanism of parameters were analyzed. From the experiment data, as the initial temperature is higher or lower than the pseudo critical temperature, the supercritical CO2 vessel decompression undergoes different decompression process. As initial temperature is lower than pseudo critical temperature, fluid temperature is lower. The decompression time is mainly related to leakage diameters and initial pressure. The results of experiments are of great significance for understanding process of accident and model development.

关 键 词：S-CO₂动力循环系统 超临界二氧化碳 LOCA 泄压喷放 泄压时间 

分 类 号：G63[文化科学—教育学]