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[1]段鹏飞,张进盛,常曦文,等.掺氢天然气在管廊中的泄漏扩散特性[J].油气储运,2023,42(08):901-909.[doi:10.6047/j.issn.1000-8241.2023.08.006]
　DUAN Pengfei,ZHANG Jinsheng,CHANG Xiwen,et al.Leakage and diffusion characteristics of hydrogen enriched natural gas in utility tunnel[J].Oil & Gas Storage and Transportation,2023,42(08):901-909.[doi:10.6047/j.issn.1000-8241.2023.08.006]
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掺氢天然气在管廊中的泄漏扩散特性

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 42 期数: 2023年08期 页码: 901-909 栏目: 检测与完整性 出版日期: 2023-08-25
Title:
Leakage and diffusion characteristics of hydrogen enriched natural gas in utility tunnel
文章编号:
1000-8241（2023）08-0901-09
作者:
段鹏飞1; 张进盛1; 常曦文2; 韩辉2; 刘翠伟2; 刘建辉1; 李玉星2
1.深圳市燃气集团股份有限公司；2.中国石油大学（华东）储运与建筑工程学院
Author(s):
DUAN Pengfei1; ZHANG Jinsheng1; CHANG Xiwen2; HAN Hui2; LIU Cuiwei2; LIU Jianhui1; LI Yuxing2
1.Shenzhen Gas Corporation Ltd.; 2.College of Pipeline and Civil Engineering, China University of Petroleum (East China)
关键词:
掺氢天然气; 管道输送; 综合管廊; 小孔泄漏; 扩散; 通风
Keywords:
hydrogen enriched natural gas;  pipeline transportation;  utility tunnel;  aperture leakage;  diffusion;  ventilation
分类号:
TK91；TE88
DOI:
10.6047/j.issn.1000-8241.2023.08.006
文献标志码:
A
摘要:
为探究掺氢天然气管道在管廊内泄漏后的扩散特性，采用CFD的Fluent软件瞬态模拟建立了管廊内管道小孔泄漏的数值模型，分析了泄漏孔方向、掺氢比、压力、泄漏孔直径对管廊内可燃气体体积分数时空分布规律的影响。结果表明：①不同泄漏孔方向对管廊内可燃气体体积分数分布曲线形状的影响较大，但不同曲线的趋势相似，均在泄漏孔坐标处达到可燃气体体积分数的最大值。②泄漏气体向通风的反方向扩散时，体积分数出现两次阶梯式下降；向通风的同方向扩散时，存在第二个峰值。③掺氢比、压力、泄漏孔直径等因素仅影响可燃气体体积分数曲线的取值范围，未对其趋势产生较大影响。④对于掺氢比不高于20％的天然气，12次/h的事故通风频率可确保压力为0.4MPa的管道发生12mm以下小孔泄漏或压力为1.6MPa的管道发生7mm以下小孔泄漏后，廊内可燃气体体积分数低于爆炸极限。研究成果可为综合管廊中掺氢天然气管道的安全运营提供理论指导。（图8，表1，参26）
Abstract:
In order to investigate the diffusion characteristics of hydrogen enriched natural gas after its leakage from pipelines in the utility tunnel, the numerical model of aperture leakage of pipelines in the utility tunnel was established by CFD Fluent transient simulation. Meanwhile, the effects of leakage aperture direction, hydrogen blending ratio, pressure and leakage aperture diameter on the temporal and spatial distribution of combustible gas volume fraction in the utility tunnel were analyzed. The results show that different leakage aperture directions have a great influence on the shape of the distribution curve of the combustible gas volume fraction in the utility tunnel, but different curves are in a similar trend, with the maximum value of the combustible gas volume fraction reached the coordinates of the leakage aperture. When the combustible gas diffuses to the opposite direction of the ventilation, two stepwise declines occur in the curve. But when the combustible gas diffuses to the same direction of the ventilation, the curve has a second peak value. The factors, such as hydrogen blending ratio, pressure and leakage aperture diameter, only affect the value range of the combustible gas volume fraction curve but not the trend. For natural gas with a hydrogen content not more than 20%, 12 times/h of emergency ventilation can ensure that the volume fraction of combustible gas in the tunnel is below the explosion limit after an aperture leakage with a hole diameter less than 12 mm occurs in the 0.4 MPa pipeline or an aperture leakage with the hole diameter less than 7 mm in the 1.6 MPa pipeline. The research results could provide theoretical guidance for the safe operation of hydrogen enriched natural gas pipelines in the utility tunnel. (8 Figures, 1 Table, 26 References)

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备注/Memo

段鹏飞，男，1992年生，工程师，2020年博士毕业于同济大学供热供燃气通风及空调工程专业，现主要从事综合能源利用方向的研究工作。地址：广东省深圳市福田区梅坳八路268号深燃大厦，518049。电话：13918375222。Email：duanpf@szgas.com.cn
基金项目：国家重点研发计划“纯氢与掺氢燃气管道输送及其应用科技试验平台”，2021YFB4001605；中国博士后基金资助项目“掺氢天然气管道入综合管廊安全机制”，2021M702289。
（收稿日期：2023-05-15；修回日期：2023-06-19；编辑：张静楠）

更新日期/Last Update: 2023-08-25