Numerical simulation of oil vapor leakage from external floating-roof tank

被引：0

作者：

Zhao, Chenlu ^{[1
]}

Huang, Weiqiu ^{[1
]}

Zhong, Jing ^{[2
]}

Wang, Wenjie ^{[1
]}

Xu, Xianyang ^{[1
]}

Wang, Yingxia ^{[1
]}

机构：

[1] Jiangsu Provincial Key Laboratory of Oil & Gas Storage and Transportation Technology, Changzhou University, Changzhou, 213016, Jiangsu

[2] School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, Jiangsu

来源：

Huagong Xuebao/CIESC Journal | 2014年 / 65卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Diffusion; Evaporation; External floating-roof tank; Numerical simulation; Oil vapor leakage; Wind pressure distribution;

D O I：

10.3969/j.issn.0438-1157.2014.10.060

中图分类号：

学科分类号：

摘要：

It is important to investigate the oil vapor leakage and emission from external floating-roof tanks for the loss evaluation and potential danger control. The oil vapor leakage from the annular space between the rim and the tank shell is one of the major sources for the evaporation loss. The vapor leakages from the rim of the single-tray floating roof are simulated numerically using FLUENT and measured experimentally. The effects of tank diameter, roof level and wind speed v on the pressure distribution above the roof surface are investigated. The results are as follows. (1) Numerical results agree with the experimental data. (2) When the ratio of the distance h between floating-roof and tank top to the tank diameter D, h/D, is greater than 1/4, the vapor is more likely to leak from the two opposite sides of the annular space perpendicular to wind direction and the side of the annular space in the upwind. (3) Tank diameter has little effect on the pressure distribution above the roof surface, while h/D and v affect the pressure distribution. Larger h/D lowers the wind pressure of roof center, and smaller h/D lowers the upwind pressure above the roof. When h/D varies from 1/20 to 1/2, the upwind and downwind pressures are negative, and with the decrease of h/D, the differential pressure above the roof increases. API loss formula for external floating-roof tank is recommended to consider the effect of ratio h/D to improve the accuracy in loss evaluation. ©All Rights Reserved

引用

页码：4203 / 4209

页数：6

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