KR100750488B1 - Heat insulating structure with Aerogel of insulated cargo tanks of LNG carrier - Google Patents

Heat insulating structure with Aerogel of insulated cargo tanks of LNG carrier Download PDF

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KR100750488B1
KR100750488B1 KR1020040004919A KR20040004919A KR100750488B1 KR 100750488 B1 KR100750488 B1 KR 100750488B1 KR 1020040004919 A KR1020040004919 A KR 1020040004919A KR 20040004919 A KR20040004919 A KR 20040004919A KR 100750488 B1 KR100750488 B1 KR 100750488B1
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South Korea
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insulation
tank
lng carrier
heat insulating
airgel
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KR1020040004919A
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Korean (ko)
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KR20050077314A (en
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민계식
김외현
김병만
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현대중공업 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/06—Coverings, e.g. for insulating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/001—Thermal insulation specially adapted for cryogenic vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0325—Aerogel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0639—Steels
    • F17C2203/0643—Stainless steels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0646—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

본 발명은 에어로젤을 이용한 LNG 운반선 단열탱크의 단열구조에 관한 것으로, 그 목적은 단열성능이 우수한 에어로젤을 이용하여 단열탱크내에 밀봉 기능을 겸한 하나의 단열층을 추가로 구성하도록 함으로써, 제 1, 2 단열벽의 두께를 감소시킬 수 있고, 이로 인해 단열탱크의 단열층 두께가 감소되어 적재용량의 손실을 줄일 수 있는 에어로젤을 이용한 LNG 운반선 단열탱크의 단열구조를 제공함에 있다.The present invention relates to an insulation structure of an LNG carrier insulation tank using an airgel, and an object thereof is to provide an insulation layer having a sealing function in the insulation tank by using an airgel having excellent insulation performance. It is possible to reduce the thickness of the wall, thereby reducing the thickness of the insulation layer of the insulation tank to provide an insulation structure of the LNG carrier insulation tank using airgel to reduce the loss of loading capacity.

본 발명은 LNG 운반선 단열탱크의 단열구조에 있어서, 사각 격자 형태의 내부공간이 구비되어 조각 또는 과립형태의 에어로젤이 충전된 후 진공상태로 밀봉된 단열실드가 제 1 단열벽과 제 2 단열벽의 사이에 설치되어 밀봉기능과 단열기능을 동시에 수행할 수 있도록 구성된 에어로젤을 이용한 LNG 운반선 단열탱크의 단열구조에 대한 것을 그 기술적 요지로 한다.
In the insulation structure of the LNG carrier insulation tank, the present invention is provided with an inner space in the form of a square lattice, filled with aerogels in the form of granules or granules, and then sealed in a vacuum state. The technical gist of the insulation structure of the LNG carrier insulation tank using an airgel installed between them to perform the sealing function and the insulation function at the same time.

단열실드, 에어로젤, 꺽임 방지턱, 돌기, 단열탱크, 단열구조Insulation shield, aerogel, bent bump, protrusion, insulation tank, insulation structure

Description

에어로젤을 이용한 ＬＮＧ 운반선 단열탱크의 단열구조{Heat insulating structure with Aerogel of insulated cargo tanks of LNG carrier} Heat insulating structure with Aerogel of insulated cargo tanks of LNG carrier             

도 1 은 본 발명에 따른 단열구조를 나타낸 단면도1 is a cross-sectional view showing an insulating structure according to the present invention

도 2 는 본 발명에 따른 단열층의 내부 확대도2 is an enlarged view of the inside of the insulating layer according to the present invention

도 3 은 본 발명에 따른 단열층의 평면도3 is a plan view of a heat insulation layer according to the present invention

도 4 는 종래의 LNG 운반선의 단열탱크 단면도
4 is a cross-sectional view of the insulating tank of the conventional LNG carrier

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

(1) : 멤브레인 금속패널 (2) : 제 2 플라이우드(1): membrane metal panel (2): second plywood

(3) : 제 1 단열벽 (4) : 알루미늄 금속판(3): first heat insulating wall (4): aluminum metal plate

(5) : 제 2 단열벽 (6) : 제 2 플라이우드(5): Second Insulation Wall (6): Second Plywood

(7) : 선체 (8) : 볼트(7): hull (8): bolt

(9) : 너트 (10) : 마스틱(9): Nut (10): Mastic

(20) : 단열실드 (21) : 칸막이(20): insulation shield (21): partition

(22) : 돌기 (23) : 꺽임 방지턱(22): projection (23): bent bump

(24) : 에어로젤 (25) : 내부공간(24): aerogels (25): interior space

본 발명은 LNG 운반선 단열탱크의 단열구조에 관한 것으로, 보다 상세하게는 폴리우레탄 폼으로 이루어진 제 1, 2 단열벽의 사이에 에어로젤이 충전된 단열실드를 삽입하여 단열층의 두께를 현저하게 줄일 수 있는 단열탱크의 단열구조에 관한 것이다.
The present invention relates to an insulation structure of the LNG carrier insulation tank, and more specifically, by inserting an insulation shield filled with an airgel between the first and second insulation walls made of polyurethane foam, the thickness of the insulation layer can be significantly reduced. The present invention relates to an insulation structure of an insulation tank.

일반적으로 액화천연가스(LNG: Liquefied Natural Gas, 이하 'LNG'라 함)는 지하에서 뽑아 올린 탄화수소 계열의 천연 가스를, 운송과 저장의 편의를 위해 영하 162℃로 압축, 냉각, 액화시켜 부피를 1/600으로 줄인 극저온의 액체를 말하는 것으로, 이는 가격에 비해 열량이 우수하여 석유 대체에너지로 각광받고 있으며, 청정에너지로서 LNG 교역량 증가에 따라 LNG 운반선의 수요도 증가하고 있다.In general, liquefied natural gas (LNG) is a hydrocarbon-based natural gas extracted from underground, compressed, cooled, and liquefied to minus 162 ° C for convenience of transportation and storage. It is a cryogenic liquid that has been reduced to 1/600, which is considered as an alternative to petroleum due to its excellent calorie value compared to its price, and the demand for LNG carriers is increasing as the LNG trade volume increases as clean energy.

상기와 같은 액화천연가스를 운반하는 LNG 운반선은 액화천연가스의 특성 때문에 단열탱크의 형식 및 성능이 중요한데 LNG 화물이 적재되는 단열탱크의 형식에 따라 구형(독립형)과 멤브레인형으로 나누어진다.LNG carriers carrying liquefied natural gas as described above are important because of the characteristics of liquefied natural gas, and the type and performance of the insulation tank are important. The LNG carrier is divided into a spherical (independent) type and a membrane type according to the type of the insulating tank loaded with LNG cargo.

도 4 는 이러한 단열탱크 형식의 하나로서 대한민국 등록특허공보 제10-0325441호는 종래의 멤브레인형 LNG 운반선의 단열탱크 구조를 도시하고 있다. 이 단열탱크의 구조는 도시된 바와 같이 이중 방벽 구조로 되어 있으며, 순차적으로 LNG가 직접 접촉하는 제 1 밀봉벽인 멤브레인 금속패널(1)과, 멤브레인을 지지해 주는 제 1 플라이우드(2)와, 제 1 단열벽(3)인 폴리우레탄 폼과, 제 2 밀봉벽인 알루미늄 금속판(4)과, 제 2 단열벽(5)인 폴리우레탄 폼과, 제 2 플라이우드(6)와, 화물과 단열탱크의 중량을 선체(7)에 전달하는 마스틱(10)과, 단열탱크를 선체에 고정하는 고정수단으로서 볼트(8)와 너트(9)로 구성되며, LNG 운반선내 단열탱크 제작공정에서 고정용 너트를 체결한 이후 제 2 단열벽인 폴리우레탄 폼에 생성된 간극은 폴리우레탄 등의 단열재로 충전하여 구성된다.4 is one of such insulating tank type, Republic of Korea Patent Publication No. 10-0325441 shows the structure of the insulating tank of the conventional membrane type LNG carrier. The insulation tank has a double barrier structure as shown in the drawing. The membrane metal panel 1, which is the first sealing wall to which LNG directly contacts, and the first plywood 2 supporting the membrane, Polyurethane foam which is the 1st heat insulation wall 3, Aluminum metal plate 4 which is a 2nd sealing wall, Polyurethane foam which is the 2nd heat insulation wall 5, The 2nd plywood 6, Cargoes, It consists of a mastic (10) for transmitting the weight of the insulated tank to the hull (7), and a bolt (8) and a nut (9) as a fixing means for fixing the insulated tank to the hull, fixed in the LNG tanker insulation tank manufacturing process The gap created in the polyurethane foam which is the second heat insulating wall after the nut is fastened is formed by filling with heat insulating material such as polyurethane.

그러나, 종래의 멤브레인형 단열탱크 구조는 보온을 위한 단열층이 폴리우레탄 폼으로만 구성됨으로써 두께가 과도하게 두꺼우므로 단열층 제조비용이 과다하고, 화물적재 용량의 손실을 초래하는 문제점이 발생되었다.However, the conventional membrane-type insulation tank structure has a problem that the insulation layer is made only of polyurethane foam, so that the thickness is excessively thick, so that the insulation layer manufacturing cost is excessive, resulting in loss of cargo loading capacity.

일례로 종래의 단열탱크 구조에 의해 건조된 145,000m3급 LNG 운반선의 경우 단열층의 두께로 인하여 약 3%정도의 적재용량 손실을 초래하고 있고, 또한 단열시스템의 단열성능은 하루에 적재 LNG의 0.15%가 기화되는 것으로 알려져 있다.For example, a 145,000m Class 3 LNG carrier built by a conventional insulated tank structure causes loss of loading capacity by about 3% due to the thickness of the insulation layer, and the insulation performance of the insulation system is 0.15 of LNG loaded per day. It is known that% is vaporized.

이러한 문제를 해결하기 위하여 단열층의 소재를 변경하려는 연구가 활발하게 이루어지고 있으나, 적재하중을 견뎌야하는 문제점과, 극저온하에서 소재의 단열 특성을 유지해야하는 문제점 등에 의해 많은 어려움이 있었다.In order to solve this problem, studies to change the material of the insulating layer has been actively conducted, but there are many difficulties due to the problem of withstanding the load load and the problem of maintaining the thermal insulation properties of the material under cryogenic temperatures.

또한, 미국특허 6,485,805에서 단열을 위한 신소재인 에어로젤(Aerogel)의 특징이 언급되어 되어 있으며, 여기서 젤(gel)이라는 용어는 접착성이 있고 견고하며 콜로이드입자로서 연속적인 3차원적 형상을 갖고 있는 것으로. 일반적으로 중화염이 없을 경우 산성조건하에서 콜로이드입자가 뭉치면서 3차원 형상의 젤 극소구 조를 형성하게 되며, 이러한 젤이 초임계 건조등에 의해 점착성의 젤 극소구조가 유지되어 저밀도의 에어로젤이 생성되는 것으로 설명되어 있다. 한편, 에어로젤(Aerogel)은 나노단위의 기공성 구조를 가진 저밀도 물질이며, 열전도도, 음파 전도도가 극히 낮으며, 단열/방음/방진/적외선 차단성 및 충격흡수 특성이 우수한 것으로 밝혀졌으나, 재질적 취성과 고압으로 압축시 단열성능이 저하되는 문제점이 있어 LNG 운반선의 단열재로 적용하는데 여러 가지 문제점이 있었다.
In addition, in US Patent 6,485,805, a feature of a new material for aerogels (Aerogel) is mentioned, wherein the term gel is an adhesive, durable, having a continuous three-dimensional shape as colloidal particles. . In general, in the absence of neutralizing salt, colloidal particles aggregate under acidic conditions to form a three-dimensional gel microstructure, and the gel microstructure is maintained by supercritical drying, such that low density airgel is produced. It is described as. Aerogel is a low-density material with nano-porous structure, extremely low thermal conductivity, sound wave conductivity, and excellent insulation / soundproof / dustproof / infrared ray blocking and shock absorption characteristics. There was a problem that the insulation performance is degraded when the brittleness and compression at high pressure have been applied to the LNG carriers, there were various problems.

본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 안출된 것으로, 그 목적은 단열성능이 우수한 에어로젤을 이용하여 단열탱크내에 밀봉기능을 겸한 하나의 단열층을 추가로 구성하도록 함으로써, 제 1, 2 단열벽의 두께를 감소시킬 수 있고, 이로 인해 단열탱크의 단열층 두께가 감소되어 적재용량의 손실을 줄일 수 있는 에어로젤을 이용한 LNG 운반선 단열탱크의 단열구조를 제공함에 있다.
The present invention has been made to solve the above-mentioned conventional problems, the object of the first and second heat insulation by additionally configuring a heat insulating layer having a sealing function in the heat insulating tank by using an airgel having excellent heat insulating performance, It is possible to reduce the thickness of the wall, thereby reducing the thickness of the insulation layer of the insulation tank to provide an insulation structure of the LNG carrier insulation tank using airgel to reduce the loss of loading capacity.

상기한 바와 같은 목적을 달성하고 종래의 결점을 제거하기 위한 본 발명은 LNG 운반선 단열탱크의 단열구조에 있어서, 사각 격자 형태의 내부공간이 구비되어 조각 또는 과립형태의 에어로젤이 충전된 후 진공상태로 밀봉된 단열실드가 제 1 단열벽과 제 2 단열벽의 사이에 설치되어 밀봉기능과 단열기능을 동시에 수행할 수 있도록 구성된 것을 특징으로 한다. The present invention for achieving the object as described above and to remove the conventional drawbacks in the insulation structure of the LNG carrier insulation tank, the inner space of the square grid form is provided to the vacuum state after filling the airgel of the granular or granular form The sealed heat insulating shield is installed between the first heat insulating wall and the second heat insulating wall, characterized in that configured to perform the sealing function and the heat insulating function at the same time.                     

또한, 상기 단열실드의 내부에 에어로젤의 이동을 방지하도록 상방향으로 돌출된 다수의 돌기가 형성된 것을 특징으로 한다.In addition, a plurality of protrusions protruded upwards to prevent movement of the airgel inside the heat insulation shield is formed.

또한, 상기 단열실드의 내부에 칸막이의 꺾임을 방지하는 꺾임 방지턱이 칸막이의 중앙부 양면에 형성된 것을 특징으로 한다.In addition, a bending prevention jaw for preventing the bending of the partition inside the heat insulation shield is formed on both sides of the central portion of the partition.

또한, 상기 단열실드는 알루미늄 또는 스테인레스 또는 니켈강 중 하나의 금속으로 이루어진 것을 특징으로 한다.
In addition, the insulating shield is characterized in that made of one metal of aluminum, stainless steel or nickel steel.

이하 본 발명의 실시예를 첨부도면과 연계하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1 은 본 발명에 따른 단열구조를 나타낸 단면도를, 도 2 는 본 발명에 따른 단열층의 내부 확대도를, 도 3 은 본 발명에 따른 단열층의 평면도를 도시한 것으로, 본 발명에 따른 단열탱크의 단열구조는 LNG가 직접 접촉하는 제 1 밀봉벽인 멤브레인 금속패널과, 상기 멤브레인 금속패널의 하면에 설치되어 금속패널에 일정한 하중이 걸리게 하는 제 1 플라이우드와, 상기 제 1 플라이우드의 하면에 설치되며 폴리우레탄 폼으로 이루어진 제 1 단열벽과, 상기 제 1 단열벽과 소정거리 이격되어 형성되며 폴리우레탄 폼으로 이루어진 제 2 단열벽과, 상기 제 2 단열벽의 하면에 설치되어 하중을 분산하는 제 2 플라이우드로 이루어진 LNG 운반선 단열탱크의 단열구조에 있어서, 다수의 칸막이에 의해 구획된 사각 격자 형태의 내부공간이 구비되어 조각 또는 과립형태의 에어로젤이 충전된 후 진공상태로 밀봉된 단열실드가 상기 제 1 단열벽과 제 2 단열벽의 사이에 설치되어 밀봉기능과 단열기능을 동시에 수행할 수 있도록 구성되어 있다.1 is a cross-sectional view showing a heat insulating structure according to the present invention, FIG. 2 is an enlarged view of the inside of the heat insulating layer according to the present invention, and FIG. 3 is a plan view of the heat insulating layer according to the present invention. The insulation structure includes a membrane metal panel, which is a first sealing wall in which LNG directly contacts, a first plywood installed on a lower surface of the membrane metal panel to apply a constant load to the metal panel, and a lower surface of the first plywood. And a first heat insulating wall made of polyurethane foam, a first heat insulating wall spaced apart from the first heat insulating wall by a predetermined distance, and a second heat insulating wall made of polyurethane foam and a bottom surface of the second heat insulating wall. In the insulation structure of LNG carrier insulated tank consisting of 2 plywoods, pieces or granules are provided with an inner space in the form of a square grid divided by a plurality of partitions Womb and is configured such that the airgel is filled after the insulation shield sealed in a vacuum state is provided between the first heat insulating wall and the second insulating wall can perform a sealing function and the heat insulating capability.

즉, 금속패널(1)/제 1 플라이우드(2)/제 1 단열벽(3)/단열실드(20)/제 2 단열벽(5)/제 2 플라이우드(6)/마스틱(10)이 순차적으로 적층된 구조로 이루어지며, 신소재 단열재인 에어로젤(24)이 단열실드(20)의 내부에 충전되어 단열실드가 단열과 밀봉기능을 동시에 수행함으로써 제 1, 2 단열벽(3,5)의 두께를 감소시킬 수 있도록 구성되어 있다.That is, the metal panel (1) / the first plywood (2) / the first heat insulating wall (3) / insulation shield 20 / the second heat insulating wall (5) / the second plywood (6) / mastic (10) It is composed of a sequentially stacked structure, the airgel 24, which is a new material heat insulating material is filled in the inside of the heat insulating shield 20, the heat insulating shield performs the heat insulating and sealing functions at the same time, the first and second heat insulating walls (3, 5) It is configured to reduce the thickness of.

상기 제 1, 2 단열벽(3,5)은 종래의 단열구조와 동일하게 폴리우레탄 폼으로 이루어지나, 종래의 제 1, 2 단열벽의 두께에 비해 현저하게 감소된 두께로 형성할 수 있으며, 이는 제 1, 2 단열벽의 사이에 설치되는 단열실드(20)에 의해 단열성능이 보완됨으로써 가능하게 된다. 다시 말해 단열실드(20)의 단열성능은 제1,2 단열벽(3,5)을 구성하는 폴리우레탄 폼에 비하여 우수하므로 제1,2 단열벽(3,5)의 두께를 감소시키되, 제1,2 단열벽(3,5)의 두께 감소에 따른 단열성능의 저하를 단열실드(20)가 보완하게 함으로써 전체적인 단열층의 두께를 감소시키면서도 단열성능을 유지할 수 있게 된다.The first and second heat insulating walls 3 and 5 may be made of polyurethane foam in the same manner as the conventional heat insulating structure, but may be formed to have a significantly reduced thickness compared to the thickness of the first and second heat insulating walls. This is made possible by the heat insulating performance being supplemented by the heat insulating shield 20 installed between the first and second heat insulating walls. In other words, the heat insulating performance of the heat insulating shield 20 is superior to the polyurethane foam constituting the first and second heat insulating walls 3 and 5, thereby reducing the thickness of the first and second heat insulating walls 3 and 5, As the heat insulation shield 20 compensates for the decrease in heat insulation performance due to the decrease in the thickness of the first and second heat insulation walls 3 and 5, the heat insulation performance can be maintained while reducing the thickness of the overall heat insulation layer.

상기 단열실드(20)는 알루미늄, 스테인레스, 니켈강등의 다양한 금속재로 제조될 수 있으며, 조각 또는 과립형태의 에어로젤(24)이 충전되는 사각 박스형의 내부공간(25)이 형성되어 있고, 이 내부공간(25)은 다수개의 칸막이(21)에 의해 격자 형태로 형성되어 있다.The insulation shield 20 may be made of various metal materials such as aluminum, stainless steel, nickel steel, etc., and an inner space 25 having a rectangular box shape filled with the airgel 24 in the form of granules or granules is formed. 25 is formed in the form of a lattice by the plurality of partitions 21.

또한, 상기 내부공간(25)의 저면에는 상방향으로 돌출된 다수의 돌기(22)가 형성되어 있고, 이 돌기(22)는 내부공간에 충전된 에어로젤(24)이 LNG 운반선의 좌우/상하 요동에 의해 움직이게 되는 것을 방지하도록 형성되어 있다.In addition, a plurality of protrusions 22 protruding upwards are formed on the bottom of the inner space 25, and the protrusions 22 are formed by the airgel 24 filled in the inner space of the LNG carrier. It is formed to prevent it from moving.

또한, 적재 중량 및 충격에 의해 내부공간을 구획하는 칸막이가 찌그러지게 되는 것을 방지하기 위해 칸막이(21)와 내부공간(25)의 저면을 연결하는 리브(Rib) 형상의 꺾임 방지턱(23)이 칸막이의 중앙부 양면에 형성되어 있다.In addition, in order to prevent the partition partitioning the internal space from being crushed by the load weight and impact, the rib-shaped bending prevention jaw 23 connecting the partition 21 and the bottom of the internal space 25 is partitioned. It is formed on both sides of the center part.

한편, 상기 단열실드(20)는 내부공간에 에어로젤이 충전된 후 진공상태로 밀봉되어 제작되어진다.Meanwhile, the adiabatic shield 20 is manufactured by sealing an airgel in an internal space and then sealing it in a vacuum state.

이와 같이 제 1, 2 단열벽(3,5)의 사이에 설치된 단열실드(20)는 종래의 알루미늄 금속판(4)의 기능인 단열탱크 밀봉기능과 단열층의 단열기능을 동시에 만족하게 된다.
Thus, the heat insulation shield 20 installed between the 1st, 2nd heat insulation walls 3 and 5 satisfy | fills the heat insulation tank sealing function which is a function of the conventional aluminum metal plate 4, and the heat insulation function of a heat insulation layer simultaneously.

상기와 같은 본 발명은 단열성능이 우수한 에어로젤이 충전된 단열실드가 제 1, 2 단열벽의 사이에 적층됨으로서, 제 1, 2 단열벽의 두께 감소가 가능하여 종래의 단열시스템보다 현저하게 두께가 감소된 단열시스템을 구성할 수 있게 되는 것이다.In the present invention as described above, the insulation shield filled with an airgel having excellent insulation performance is laminated between the first and second insulation walls, so that the thickness of the first and second insulation walls can be reduced, which is remarkably thicker than that of a conventional insulation system. It is possible to construct a reduced insulation system.

본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.
The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

상술한 바와 같이 본 발명은 제 1 단열벽/단열실드/제 2 단열벽이 순차적으로 적층된 삼중방벽 구조로서, 단열성능은 우수하고, 종래의 단열층에 비해 단열층 의 두께를 현저하게 줄일 수 있으며, 이로 인해 LNG 운반선의 적재용량의 손실을 줄여 LNG 운반선의 운항 경제성을 향상시킬 수 있는 효과가 있는 것이다.

















As described above, the present invention is a triple barrier structure in which the first insulation wall / insulation shield / second insulation wall is sequentially stacked, and has excellent insulation performance, and can significantly reduce the thickness of the insulation layer as compared with the conventional insulation layer. As a result, it is possible to reduce the loss of the cargo capacity of the LNG carriers and to improve the operational economics of the LNG carriers.

















Claims (4)

삭제delete LNG 운반선 단열탱크의 단열구조에 있어서,In the insulation structure of the LNG carrier insulation tank, 사각 격자 형태의 내부공간이 구비되어 조각 또는 과립형태의 에어로젤이 충전된 후 진공상태로 밀봉되며, 내부에 에어로젤의 이동을 방지하도록 상방향으로 돌출된 다수의 돌기가 형성된 단열실드가 제 1 단열벽과 제 2 단열벽의 사이에 설치되어 밀봉기능과 단열기능을 동시에 수행할 수 있도록 구성된 것을 특징으로 하는 에어로젤을 이용한 LNG 운반선 단열탱크의 단열구조.The inner space in the form of a square lattice is filled with aerogels in the form of granules or granules, and then sealed in a vacuum state, and a heat insulation shield having a plurality of protrusions protruding upwards to prevent movement of the airgels therein comprises a first insulation wall. Insulated structure of the LNG carrier insulation tank using an airgel is installed between the second insulation wall and configured to perform the sealing function and the insulation function at the same time. 제 2 항에 있어서,The method of claim 2, 상기 단열실드의 내부에 칸막이의 꺾임을 방지하는 꺾임 방지턱이 칸막이의 중앙부 양면에 형성된 것을 특징으로 하는 에어로젤을 이용한 LNG 운반선 단열탱크의 단열구조.Insulation structure of the LNG carrier insulation tank using an airgel, characterized in that the bending prevention jaw to prevent the bending of the partition inside the insulation shield is formed on both sides of the central portion of the partition. 제 2 항에 있어서,The method of claim 2, 상기 단열실드는 알루미늄 또는 스테인레스 또는 니켈강 중 선택된 하나의 금속으로 이루어진 것을 특징으로 하는 에어로젤을 이용한 LNG 운반선 단열탱크의 단열구조.The insulation shield is an insulation structure of the LNG carrier insulation tank using an airgel, characterized in that made of a metal selected from aluminum, stainless steel or nickel steel.
KR1020040004919A 2004-01-27 2004-01-27 Heat insulating structure with Aerogel of insulated cargo tanks of LNG carrier KR100750488B1 (en)

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Publication number Priority date Publication date Assignee Title
KR101031251B1 (en) * 2008-04-25 2011-04-29 삼성중공업 주식회사 A structure of insulation for lng carrier cargo
KR101259007B1 (en) * 2011-03-31 2013-04-29 삼성중공업 주식회사 Secondary barrier in the liquefied gas tank and Insulation barrier with a same

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