Numerical study on effects of the cofferdam area in liquefied natural gas storage tank on the leakage and diffusion characteristics of natural gas

doi:10.1016/j.cjche.2020.07.049

	Numerical study on effects of the cofferdam area in liquefied natural gas storage tank on the leakage and diffusion characteristics of natural gas
	Lin, Zirong 1,3,4; Wang, Shuangfeng 3; Fu, Shuxun 1; Huo, Jiepeng 2
刊名	CHINESE JOURNAL OF CHEMICAL ENGINEERING
	2021
卷号	29 期号:1 页码:228-241
关键词	Natural gas Leakage and diffusion Cofferdam Numerical simulation
ISSN号	1004-9541
DOI	10.1016/j.cjche.2020.07.049
通讯作者	Wang, Shuangfeng(sfwang@scut.edu.cn)
英文摘要	The leakage and diffusion characteristics of natural gas were investigated in the condition of the leakage of liquefied natural gas (LNG) in the storage tank. Fluent was adopted to simulate the process in a series of three-dimension unsteady state calculations. The effects of different heights of the cofferdam (1.0 m, 2.0 m and 3.0 m), wind directions, ambient temperature, leakage location, leakage volume on the diffusion process of natural gas were investigated. The diffusion characteristics of the natural gas clouds over cofferdam were found. Under windless condition, when the gas clouds met, the gas clouds rose due to the collision, which made them easier to cross the cofferdam and spread out. The higher the ambient temperature was, the higher the gas concentration around the cofferdam was, and the smaller the gas concentration difference was. When the leakage occurred, the higher cofferdam was more beneficial to delay the outward diffusion of gas clouds. However, when the leakage stopped, the higher cofferdam went against the dissipation of gas clouds. Under windy condition, the time to form stable leakage flow field was faster than that of windless, and the lower cofferdam further reduced this time. Therefore, considering the effect of barrier and dissipation, it was suggested that the rational height of cofferdam should be designed in the range of 1.0m to 2.0m. In case of emergency, the leakage of gas should be deduced reasonably by combining the measurement of gas concentration with the rolling of gas clouds. When windless, the leakage area should be entered between the overflows of gas clouds. (C) 2020 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.
资助项目	Funding for post-doctoral research in Foshan City
WOS研究方向	Engineering
语种	英语
出版者	CHEMICAL INDUSTRY PRESS CO LTD
WOS记录号	WOS:000636564100028
资助机构	Funding for post-doctoral research in Foshan City
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/33073]
专题	中国科学院广州能源研究所
通讯作者	Wang, Shuangfeng
作者单位	1.Foshan Gas Grp Co Ltd, Foshan 528000, Guangdong, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 3.South China Univ Technol, Guangzhou 510640, Guangdong, Peoples R China 4.Foshan Publ Util Holding Co Ltd, Foshan 528000, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Lin, Zirong,Wang, Shuangfeng,Fu, Shuxun,et al. Numerical study on effects of the cofferdam area in liquefied natural gas storage tank on the leakage and diffusion characteristics of natural gas[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2021,29(1):228-241.
APA	Lin, Zirong,Wang, Shuangfeng,Fu, Shuxun,&Huo, Jiepeng.(2021).Numerical study on effects of the cofferdam area in liquefied natural gas storage tank on the leakage and diffusion characteristics of natural gas.CHINESE JOURNAL OF CHEMICAL ENGINEERING,29(1),228-241.
MLA	Lin, Zirong,et al."Numerical study on effects of the cofferdam area in liquefied natural gas storage tank on the leakage and diffusion characteristics of natural gas".CHINESE JOURNAL OF CHEMICAL ENGINEERING 29.1(2021):228-241.