[1]于春柳,芦娅妮,康进科,等.黄土层温度对液化天然气地下储罐罐内液体分层翻滚影响研究[J].石油化工设备,2025,54(01):20-25.[doi:10.3969/j.issn.1000-7466.2025.01.004]
　YU Chun-liu,LU Ya-ni,KANG Jin-ke,et al.Study on Impact of Loess Layer Temperature on Liquid Stratification Rollover in Liquefied Natural Gas Underground Storage Tanks[J].Petro-Chemical Equipment,2025,54(01):20-25.[doi:10.3969/j.issn.1000-7466.2025.01.004]
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黄土层温度对液化天然气地下储罐罐内液体分层翻滚影响研究()
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石油化工设备[ISSN:1000-7466/CN:62-1078/TQ]

卷:
54
期数:
2025年01期
页码:
20-25
栏目:
设计计算
出版日期:
2025-01-25

文章信息/Info

Title:
Study on Impact of Loess Layer Temperature on Liquid Stratification Rollover in Liquefied Natural Gas Underground Storage Tanks
文章编号:
1000-7466(2025)01-0020-06
作者:
于春柳1; 芦娅妮1; 康进科1; 顾 颖2
（1.陇东学院 石油化工学院，甘肃 庆阳 745000；2.天华化工机械研究院，甘肃 兰州 730000）
Author(s):
YU Chun-liu1; LU Ya-ni1; KANG Jin-ke1; GU Ying2
（1.Petrochemical College of Longdong University，Qingyang 745000，China; 2.Tianhua Chemical Machinery Research Institute,Lanzhou 730000,China）
关键词:
黄土层温度; 地下LNG储罐; 翻滚; 密度差
Keywords:
loess layer temperature;  underground LNG storage tank;  rollover;  density difference
分类号:
TQ050；TE9
DOI:
10.3969/j.issn.1000-7466.2025.01.004
文献标志码:
A
摘要:
液化天然气（LNG）采用地下储罐方式存储时，会受罐外黄土层温度影响而发生不同程度的漏热，进而组分发生变化引起翻滚，LNG翻滚会造成储罐超压甚至爆炸。以已经发生分层的 5 000 m3地下LNG储罐罐内相邻两液层为研究对象，采用有限元分析法，对春、夏、秋、冬四季不同黄土层温度下的分层液体进行翻滚过程数值模拟，分析对比四季LNG液层的密度、速度场数值，总结变化规律。结果表明，夏季黄土层温度最高，对液层翻滚影响最大，春、秋两季的影响次之，冬季影响最小。四季液层平均密度差异随时间t变化明显，且冬、夏两季液层平均密度差异最大，t=200 s时，差值为5.693 kg/m3；t=1 200 s，差值达16.216 kg/m3。可为LNG地下储罐设计季节性绝热装置、提高LNG的无损存储效率提供参考。
Abstract:
When liquefied natural gas (LNG) is stored in underground tanks, it can be affected by the temperature of the surrounding loess layer, resulting in different heat losses. It can also change its composition and cause rollover. LNG rollover can result in overpressure or explosion within the storage tank. Taking the adjacent two liquid layers within a 5 000 m3 stratified underground LNG storage tank as the research object, a finite element analysis method was used to perform numerical simulations of the rollover process for the stratified liquids at different temperatures within the loess layers during the spring, summer, autumn and winter seasons. The numerical values of the density and velocity fields of the LNG liquid layers during the four seasons were analysed and compared, and the patterns of variation were summarised. The results show that the highest temperature of the loess layer in summer has the greatest influence on the liquid layer rollover, followed by spring and autumn, while winter has the least influence. The average density difference between the liquid layers during the four seasons varies significantly over time t, with the difference being greatest between winter and summer. At t=200 s the difference is 5.693 kg/m3;at t=1 200 s the difference reaches 16.216 kg/m3. These results provide valuable insights for the design of seasonal insulation devices for underground LNG storage tanks and for improving the loss-free storage process of LNG.

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备注/Memo

备注/Memo:
收稿日期： 2024-08-06
基金项目：庆阳市科技计划项目(QY-STK-2022B-149)：黄土层温度对LNG地下储罐热力学性能影响研究
作者简介：于春柳（1986-），女，内蒙古赤峰人，讲师，硕士，主要从事低温储运技术与设备研究。E-mail：yycclg@126.com。
更新日期/Last Update: 2025-02-01