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Edition and Publication:
< Natural Gas and Oil > Editorial Department
Hosted by:
China Petroleum Engineering & Construction Corporation Southwest Company
Authorized by:
China Petroleum Engineering & Construction Corporation
Co-hosted by:
Overseas Research Center of Research Institute of Petroleum Exploration and Development
Editor in Chief:
Du Tonglin
Vice Editor in Chief:
Tang Xiaoyong,Pu Liming
Address:
No.6, Shenghua Road, High-tech District, Chengdu, Sichuan, China
Postal Code:
610041
Tel:
028-86014709
028-86014500
Email:
cnpc-ngo@cnpc.com.cn
Issue:ISSN 1006-5539
CN 51-1183/TE

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Study on Large LNG Tank Pre-cooling Based on FLUENT

Author of the article:Dong Wenhao, Zheng Jin, Xu Peilin, Guo Haifeng, Ji Xiaxia

Author's Workplace：1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University;2.China Petroleum Group Chuanqing Drilling Engineering Co., Ltd.,

Key Words：LNG storage tank; Pre-cooling; Simulation; Influencing factor

Abstract：Tank pre-cooling is an important and essential process before LNG receiving terminal is put into operation. At present, tank top annular injection process is usually applied to LNG tank pre-cooling in China. In order to avoid too large temperature difference between inner and outer wall during the pre-cooling, FLUENT software is used to conduct simulation study on pre-cooling process of 16 x 10⁴m³ LNG tank, analyzed are some problems occurring in tank pre-cooling process and proposed are relative improvement measures. Study shows that tank top pre-cooling process tends to accumulate cool energy within the tank and pipe diameter and LNG inflow speed are critical factors affecting inner temperature. The improved columnar pre-cooling process can effectively control too large temperature difference between inner and outer wall, which can improve operation safety and extend service life of LNG tank.