Numerical analysis of gas displacement in cargo tank of an LNG carrier.

[In Japanese. / En japonais.]

Author(s) : SAKAMOTO T., HAMASAKI R., et al.

Type of article: Article

Summary

Gas displacement operations in cargo tanks are carried out before and after an LNG carrier goes to a dry-dock. The tank atmosphere is exchanged from flammable natural gas, to air with sufficient oxygen concentration, or vice versa, without producing an explosive atmosphere by inserting inerted conditions. These operations are very important from a safety point of view. Care must be taken to ensure that impurities, such as moisture or carbon dioxide, which will deteriorate the LNG cargo quality, do not remain in the tanks after the operations. A series of numerical simulations of gas displacement operations using a 3-dimensional finite differential method are presented, for a scale model tank of a large LNG carrier.

Details

Original title: [In Japanese. / En japonais.]
Record ID : 1994-0741
Languages: Japanese
Source: Hitachi Zosen tech. Rev. - vol. 54 - n. 1
Publication date: 1993

Links

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Indexing

Themes: LNG and LPG;
Applications of liquified gases
Keywords: Methane carrier; Maintenance; Sea transport; Simulation; LNG