|本期目录/Table of Contents|

[1]胡赛涛,张圣柱,王旭,等.家庭厨房内不同比例混氢天然气泄漏扩散研究*[J].中国安全生产科学技术,2024,20(2):90-96.[doi:10.11731/j.issn.1673-193x.2024.02.012]
　HU Saitao,ZHANG Shengzhu,WANG Xu,et al.Study on leakage and diffusion of hydrogen-blended natural gas with different ratios in home kitchen[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2024,20(2):90-96.[doi:10.11731/j.issn.1673-193x.2024.02.012]
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家庭厨房内不同比例混氢天然气泄漏扩散研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
20
期数:
2024年2期
页码:
90-96
栏目:
职业安全卫生管理与技术
出版日期:
2024-02-29

文章信息/Info

Title:
Study on leakage and diffusion of hydrogen-blended natural gas with different ratios in home kitchen
文章编号:
1673-193X(2024)-02-0090-07
作者:
胡赛涛; 张圣柱; 王旭; 李云涛
（1.中国石油大学（北京） 安全与海洋工程学院，北京 102249；
2.中国安全生产科学研究院，北京 100012）
Author(s):
HU Saitao;  ZHANG Shengzhu;  WANG Xu;  LI Yuntao
(1.College of Safety and Ocean Engineering,China University of Petroleum(Beijing),Beijing 102249,China;
2.China Academy of Safety Science and Technology,Beijing 100012,China)
关键词:
家庭厨房; 混氢天然气; 泄漏扩散; 通风条件
Keywords:
home kitchen;  hydrogen-blended natural gas;  leakage and diffusion;  ventilation condition
分类号:
TE88；X932
DOI:
10.11731/j.issn.1673-193x.2024.02.012
文献标志码:
A
摘要:
为探究不同比例混氢天然气在家庭厨房内泄漏后的扩散特性，采用FLACS构建家庭厨房数值模型，研究不同比例混氢天然气泄漏后在水平（泄漏口侧到远离泄漏口侧）和垂直方向上的浓度分布，对比自由扩散和对流通风对气体扩散的影响。研究结果表明：距泄漏口上方1.15 m高度以下，高度、时间及混氢比对水平方向上气体体积分数的降幅影响较小；泄漏口侧和远离泄漏口侧垂直方向上具有不同层级的分层现象，且随混氢比和时间的增大，分层现象减弱；混氢比从0%增加到40.0%时，报警时间降幅比仅为1.42%；相较自由扩散，对流通风能快速排出可燃气体，降低风险。研究结果可为城镇燃气混氢应用提供参考。
Abstract:
In order to investigate the diffusion characteristics of hydrogen-blended natural gas with different ratios after leakage in home kitchen,a numerical model of home kitchen was constructed using FLACS.The concentration distribution of hydrogen-blended natural gas with different ratios after leakage in the horizontal (from the side of leakage outlet to the side away from leakage outlet) and vertical directions was studied,and the influence of free diffusion and convective ventilation on the gas diffusion was compared.The results show that below the height of 1.15 m above the leakage outlet,the influence of height,time and hydrogen-blended ratio on the decrease of gas volume fraction in the horizontal direction is small.There are the stratification phenomena of different layers in the vertical direction on the side of leakage outlet and the side away from the leakage outlet,and the stratification phenomenon is weakened with the increase of the hydrogen-blended ratio and time.When the hydrogen-blended ratio increases from 0% to 40.0%,the reduction ratio of the alarm time is only 1.42%.Compared with free diffusion,the convective ventilation can quickly discharge the combustible gases and reduce the risk.The results of the study can provide a reference for the application of hydrogen mixing in urban gas.

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备注/Memo

备注/Memo:
收稿日期： 2023-10-07
* 基金项目： 国家重点研发计划项目（2022YFC3070100）；中国安全生产科学研究院基本科研业务费专项资金项目（2023JBKY18）
作者简介： 胡赛涛，硕士研究生，主要研究方向为城镇燃气泄漏后果研究。
通信作者： 张圣柱，博士，正高级工程师，主要研究方向为油气管道及危险化学品安全技术。
更新日期/Last Update: 2024-03-11