超临界二氧化碳容器小尺度泄压喷放实验研究
Small Scale Experimental Study of Supercritical Carbon Dioxide Decompression from Vessel
DOI: 10.12677/NST.2020.83012, PDF,    国家自然科学基金支持
作者: 田耕源, 周 源, 曾成天, 黄家坚：四川大学物理学院，四川 成都；黄彦平, 王俊峰：中国核动力研究设计院，四川 成都
关键词: S-CO2动力循环系统；CCS；S-CO2；泄压喷放；泄漏；Supercritical Carbon Dioxide Power Cycle System； Carbon Capture and Storage； Supercritical Carbon Dioxide； Blowdown； Leakage
摘要: CO2意外泄漏是超临界CO2动力循环系统和碳捕获与存储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容器快速泄压的热力学特性和流动特点，压力容器体积为50 L。开展了初始工况为8.1 MPa，38.0℃和10.0 MPa，38.0℃的泄压实验。通过测量流体压力、流体温度、壁面温度、质量流量以及外部射流结构来分析超临界CO2泄压特性。实验得到不同初始状态会经历不同的泄压过程。外部射流结构可以分为三阶段：射流长度增加阶段，射流长度维持稳定阶段，射流长度减小阶段。此外，实验得到容器底部外壁温最低温度可以达到−26.9℃ (10.0 MPa, 38.0℃)。本文的实验结果对理解事故过程和模型开发具有重要意义。
Abstract: The accidental release is one of the main risks of carbon capture and storage (CCS) and 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 initial states are 8.1 MPa, 38.0˚C and 10.0 MPa, 38.0˚C. In the experiment, thermohydraulic behaviors of decompression were analyzed by measuring pressure, fluid temperature, wall temperature, mass flow rate and external jet structure. From the experiment data, different initial state undergoes different decompression process. The external jet can be divided into three stages: the white jet’s length increase stage, the temporary stable stage and the attenuation stage. In addition, experiments show that the lowest temperature at the bottom of vessel will reach −26.9˚C (10.0 MPa, 38.0˚C). The results of experiments are of great significance for understanding process of accident and model development.
文章引用：田耕源, 周源, 黄彦平, 王俊峰, 曾成天, 黄家坚. 超临界二氧化碳容器小尺度泄压喷放实验研究[J]. 核科学与技术, 2020, 8(3): 103-111. https://doi.org/10.12677/NST.2020.83012

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