Liquefied natural gas carrier vessel, and marine transportation method for liquefied natural gas

A technology for liquefied natural gas and transport ships, which is applied in the directions of transportation and packaging, gas processing/storage purposes, ship accessories, etc., and can solve problems such as easy sloshing

Inactive Publication Date: 2010-03-31
森元信吉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the tank of the diaphragm system, sloshing is likely to occur with the passage of days after sailing from the loading place

Method used

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  • Liquefied natural gas carrier vessel, and marine transportation method for liquefied natural gas
  • Liquefied natural gas carrier vessel, and marine transportation method for liquefied natural gas
  • Liquefied natural gas carrier vessel, and marine transportation method for liquefied natural gas

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Experimental program
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Embodiment Construction

[0020] Such as figure 1 and figure 2 As shown, the LNG tanker is connected in sequence from the front to the bow 10 , the tank section 12 , the engine room 14 and the stern 16 , and the upper part of the engine room is provided with a living area 18 and then a wheelhouse 20 . The tank compartment 12 is divided into a plurality of compartments by transverse partitions 22, a spherical independent tank 24 is provided in the front compartment 23, and a diaphragm tank 26 is formed in the second to fifth compartments.

[0021] image 3 It is a cross-sectional view of a diaphragm tank. The hull has a two-layer hull structure at the bottom and side of the ship. By applying a heat-resistant layer 30 to the surface of these inner shells 28, the surface of the heat-resistant layer is covered with a diaphragm 32 in a liquid-tight manner. And the membrane type tank 26 is formed. In order to increase the tank capacity, the head of each diaphragm tank 26 protrudes upward through the uppe...

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Abstract

Intended is to provide an LNG tanker, which can have a large tank capacity and which can be easily constructed. Further intended is to reduce the sloshing of a membrane type tank in a rough weather. The foremost LNG tank is constituted of a spherical independent type tank (24), and all succeeding tanks are constituted of membrane type tanks (26). Specifically, the membrane type tanks (26) are formed by performing a heat insulation in the hull inner shell and by covering their surfaces with membranes. During the voyage, the liquid cargo (LNG) in the spherical independent type tank (24) is transferred to the other membrane type tanks (26), thereby to restore the quantity of the liquid cargo, which has been reduced by the generation of the boil-off gas, of the membrane type tanks (26).

Description

technical field [0001] The present invention relates to offshore transportation of liquefied natural gas (LNG). Background technique [0002] Since LNG emits less nitrogen oxide or sulfurous acid gas when it is burned, the need for clean energy is increasing every year. LNG is a substance that has been liquefied by cooling natural gas down to -160°C. The tanks of LNG carriers transporting this substance at sea use low-temperature materials that can withstand a wide range of temperature changes. Stress structure. In addition, because the LNG carrier undertakes the mission of high-speed and large-scale transportation, it generally has a sailing speed of about 20 knots, and the hull tends to be larger. Now it is planned that the tank capacity will exceed 200,000m 3 LNG carrier. [0003] In the existing LNG carriers, the LNG tanks mounted on it are roughly divided into two types, one is a spherical independent tank method, and the other is a diaphragm method (for example, U.S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B25/16
CPCF17C2223/0161F17C2221/033F17C2260/016F17C2270/0105B63B25/16B65D90/52F17C3/027B63B2025/087F17C2270/0107
Inventor 森元信吉
Owner 森元信吉
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