引用本文:徐艳华,彭文山,李金娟,曹学文. 大型LNG储罐预冷数值模拟[J]. 石油与天然气化工, 2018, 47(1): 51-59.
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大型LNG储罐预冷数值模拟
徐艳华1,彭文山2,李金娟3,曹学文3
1.中石化胜利石油管理局桩西采油厂 ;2.中国船舶重工集团公司第七二五研究所 海洋腐蚀与防护重点实验室;3.中国石油大学(华东) 储运与建筑工程学院
摘要:
建立大型LNG储罐预冷模型,采用FLUENT软件对储罐低温气体预冷过程进行数值模拟,研究了储罐冷却过程中物理场的变化规律以及低温气体入口流量。结果 表明:①大型LNG储罐预冷时,罐内气体温度最先降低,罐底比罐顶、罐壁最先冷却；②根据规范中对储罐预冷温降速率的要求调控低温气体的流量,提出五阶段LNG储罐逐步冷却方法,得到了不同阶段低温气体的入口流量。 
关键词:  LNG储罐  预冷  冷却速率  温度变化  质量流量
DOI：10.3969/j.issn.1007-3426.2018.01.010
分类号:
基金项目:
Numerical simulation of the pre-cooling process of large-scale LNG storage tank
Xu Yanhua1, Peng Wenshan2, Li Jinjuan3, Cao Xuewen3
1. Zhuangxi Production Plant of SINOPEC Shengli Oilfield, Dongying, Shandong, China;2. State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao, Shandong, China;3. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, Shandong, China
Abstract:
The pre-cooling model of large-scale LNG storage tank is established, and the FLUENT software is used to simulate the pre-cooling process of the cryogenic gas in the storage tank. The change laws of the physical field during the cooling process and the inlet flow of the low temperature gas are studied. The results show that when the large-scale LNG storage tank is pre-cooled, the temperature of the gas is reduced first, and the bottom of the tank is cooled before the roof and wall; according to the requirements of the pre-cooling rate of the tank to regulate the flow rate of low temperature gas, the five-stage method of gradually cooled of LNG storage tank is proposed, and the inlet flow rate of different stages of low temperature gas is obtained.
Key words:  LNG storage tank  pre-cooling  cooling rate  temperature change  mass flow rate