Experimental and numerical study on the falling film flow characteristics outside circular tube applied in floating liquefied natural gas (FLNG) under offshore conditions

2021 ◽  
Vol 92 ◽  
pp. 108883
Author(s):  
Chongzheng Sun ◽  
Liang Liu ◽  
Yuxing Li ◽  
Xuewen Cao ◽  
Hui Han
Keyword(s):  
Natural Gas ◽  
Film Flow ◽  
Circular Tube ◽  
Numerical Study ◽  
Flow Characteristics ◽  
Liquefied Natural Gas ◽  
Falling Film

Numerical study of steady natural convection in a liquefied natural gas cylindrical storage tank equipped with baffles

2019 ◽  
Vol 234 (5) ◽  
pp. 709-721 ◽  
Author(s):  
Mohamed Haddar ◽  
Moez Hammami ◽  
Mounir Baccar
Keyword(s):  
Rayleigh Number ◽  
Natural Gas ◽  
Lateral Surface ◽  
Storage Tank ◽  
Cooling System ◽  
Numerical Study ◽  
Gas Storage ◽  
Liquefied Natural Gas ◽  
Natural Gas Storage ◽  
Average Temperature

In this paper, a study of cooling system for a liquefied natural gas storage tank is conducted. Our objective is to remedy the heat ingress to the liquefied natural gas from the environment using baffles toward limiting temperature elevation in the tank, and then the Boil-off Gas (BOG) formation. A specific code based on the finite volume method is developed to supply a fine knowledge of the hydrodynamic and thermal liquefied natural gas characteristics in the cylindrical tank heated from bottom and lateral surfaces. The effect of the number, position and dimension of baffles, on the flow structure and thermal behavior, has been analyzed. According to our simulation results, the baffles should be placed at the top of tank nearby the lateral wall as the liquefied natural gas dimensionless average temperature can be reduced by 36%. The installation of four rectangular baffles, equally spaced around the perimeter of the tank, gives better homogenization of the temperature field and decreases the average temperature by about 44% in order to limit BOG formation. Finally, two correlations of the Nusselt number are established for the flat rectangular baffle plates and the lateral surface of the cylindrical liquefied natural gas storage tank as a function of the Rayleigh number, as well as the baffle number. Scaling of these correlations with the Rayleigh number gives exponents of 0.25 and 0.18 for lateral surface and baffle, respectively, which are in good agreement with literature.

Experimental and numerical study of liquefied natural gas (LNG) pool spreading and vaporization on water

2017 ◽  
Vol 334 ◽  
pp. 244-255 ◽  
Author(s):  
Nirupama Gopalaswami ◽  
Konstantinos Kakosimos ◽  
Bin Zhang ◽  
Yi Liu ◽  
R. Mentzer ◽  
...  
Keyword(s):  
Natural Gas ◽  
Numerical Study ◽  
Liquefied Natural Gas
Sign in / Sign up

Export Citation Format

Share Document