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- Title
CHARACTERISTICS OF HEAT TRANSFER DURING COOLING DOWN PROCESS IN A SINGLE CARGO TANK OF LNG CARRIER.
- Authors
Deng, J. J.; Song, L. Y.; Xu, J.; Liu, B.; Lu, J. S.; Zhang, J. W.
- Abstract
A deep understanding of heat transfer characteristics is essential in evaluating risk and putting forward any option for die Liquefied Natural Gas (LNG) tank cooling down process. A novel Computational Fluid Dynamics (CED) model was built to perform die flow and heat transfer simulation of the process. The predicted results agreed well with die test data fiom a prototype LNG tank. Then the heat transfer characteristics of die process were analysed. It was found that the vapour temperature and density were linearly varying and became stable after 2.3 hows. A sudden pressure diop risk was identified during the process, which will cause the inwards collapse risk of the invar membrane. Then the proposals to prevent die risks of the inwards collapsing membrane ai e presented. The heat transfer characteristics of die vapour and different membrane layers were analysed in detail, and if the suggested option was to be implemented this could save about 39% of LNG conswned.
- Subjects
HEAT transfer; TANKS; LIQUEFIED natural gas safety measures; COMPUTATIONAL fluid dynamics; FLUID dynamics
- Publication
International Journal of Maritime Engineering - Transactions of the Royal Institute of Naval Architects - Part A, 2020, Vol 162, Issue Part A3, p231
- ISSN
1479-8751
- Publication type
Article
- DOI
10.3940/rina.ijme.2020.a3.588