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Insulation system for floating marine structure

a technology for insulating systems and floating structures, which is applied in the direction of hull parts, vessel construction, transportation and packaging, etc., can solve the problems of sudden decrease in steel temperature between cold lng storage tanks, damage to cofferdams, and brittle fractures, so as to reduce the boil-off rate (bor) generated, reduce the heat transfer, and reduce the effect of heat transfer

Inactive Publication Date: 2016-06-09
DAEWOO SHIPBUILDING & MARINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is about controlling the temperature of a cofferdam and using heat insulating material to decrease heat transfer from the cofferdam to multiple LNG storage tanks and from certain parts of the ship to the LNG tanks. This decreases boil-off rate, which is the heat that escapes and causes damage, while maintaining the efficiency of transporting LNG.

Problems solved by technology

Further, in the case of the membrane type LNG storage tank, if the cold LNG storage tanks are continuously installed, a temperature of steel between the cold LNG storage tanks is suddenly decreased, and therefore a brittle fracture may occur.
If the general steel is exposed to −60° C., the cofferdam is damaged due to low temperature brittleness.
However, if the very low temperature material is used, ship prices may suddenly rise.

Method used

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  • Insulation system for floating marine structure
  • Insulation system for floating marine structure
  • Insulation system for floating marine structure

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embodiments

[0071]In order to sufficiently understand the present invention, operational advantages of the present invention, and objects accomplished by embodiments of the present invention, the accompanying drawings showing embodiments of the present invention and contents described in the accompanying drawings should be referred.

[0072]Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals proposed in each drawing denote like components.

[0073]In the present specification, a floating structure includes a ship and various structures that are used while floating on the sea, including a storage tank for storing LNG and may include an LNG floating, production, storage and offloading (LNG FPSO), an LNG floating storage and regasification unit (LNG FSRU), an LNG carrier, and an LNG regasification vessel (LNG RV).

[0074]FIG. 1 is a side view schematically illustrating a state in which a cofferdam is installed i...

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Abstract

Disclosed herein is a heat insulating system of a floating structure, and more particularly, a heat insulating system of a floating structure in which a heat insulating material is provided at at least one of a ballast tank, a trunk deck space, and a side passage way contacting the trunk deck to decrease a boil-off rate (BOR) occurring due to a heat transfer from an external region of a hull into an LNG storage tank.

Description

TECHNICAL FIELD[0001]The present invention relates to a heat insulating system of a floating structure, and more particularly, to a heat insulating system of a floating structure capable of decreasing a boil-off rate (BOR) by decreasing a heat transfer through at least one of a ballast tank, a trunk deck space, and a side passage way contacting a trunk deck.BACKGROUND ART[0002]Generally, natural gas is transported in a gas state through a ground or maritime gas pipe and is stored in an LNG carrier in a liquefied natural gas (hereinafter, referred to as ‘LNG’) state to be transported to remote consumption sites.[0003]The LNG obtained by cooling the natural gas at a very low temperature (approximately, −163° C.) has a volume decreased to approximately 1 / 600 compared to that of the natural gas in a gas state. Therefore, the LNG is very suitable for long distance transportation through the sea.[0004]The LNG may be transported through the sea while being carried in the LNG carrier to be ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B63B25/16B63J2/14
CPCB63J2/14B63B25/16B63B3/68F17C2221/033F17C2223/0161F17C2223/033F17C2260/033F17C2270/0107
Inventor YOO, BYEONG YONGMOON, YOUNG SILKSHIN, JUNG SUB
Owner DAEWOO SHIPBUILDING & MARINE ENG CO LTD
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