AU2020430102A1 - Liquefied gas tank and ship - Google Patents

Liquefied gas tank and ship Download PDF

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Publication number
AU2020430102A1
AU2020430102A1 AU2020430102A AU2020430102A AU2020430102A1 AU 2020430102 A1 AU2020430102 A1 AU 2020430102A1 AU 2020430102 A AU2020430102 A AU 2020430102A AU 2020430102 A AU2020430102 A AU 2020430102A AU 2020430102 A1 AU2020430102 A1 AU 2020430102A1
Authority
AU
Australia
Prior art keywords
liquefied gas
thin film
film layer
tank
tank body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
AU2020430102A
Other versions
AU2020430102B2 (en
Inventor
Ryusuke TAKADA
Shin Terada
Michihisa WATANABE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Shipbuilding Co Ltd
Original Assignee
Mitsubishi Shipbuilding Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Shipbuilding Co Ltd filed Critical Mitsubishi Shipbuilding Co Ltd
Publication of AU2020430102A1 publication Critical patent/AU2020430102A1/en
Application granted granted Critical
Publication of AU2020430102B2 publication Critical patent/AU2020430102B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/082—Mounting arrangements for vessels for large sea-borne storage vessels
    • 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
    • B63B25/14—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed pressurised
    • 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
    • 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
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • 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
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/04—Vessels not under pressure with provision for thermal insulation by insulating layers
    • 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
    • B63B2025/087—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid comprising self-contained tanks installed in the ship structure as separate units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B2231/00—Material used for some parts or elements, or for particular purposes
    • B63B2231/02—Metallic materials
    • B63B2231/04—Irons, steels or ferrous alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B2231/00—Material used for some parts or elements, or for particular purposes
    • B63B2231/60—Concretes
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0128—Shape spherical or elliptical
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • 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
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/011—Reinforcing means
    • F17C2203/012—Reinforcing means on or in the wall, e.g. ribs
    • 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
    • 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
    • F17C2203/0308—Radiation shield
    • 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
    • F17C2203/0337—Granular
    • F17C2203/0341—Perlite
    • 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
    • F17C2203/0358—Thermal insulations by solid means in form of panels
    • 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
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0614—Single wall
    • F17C2203/0621—Single wall with three layers
    • 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
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • 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
    • 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
    • F17C2203/0648—Alloys or compositions of metals
    • F17C2203/0651—Invar
    • 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
    • F17C2203/0678—Concrete
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/018—Supporting feet
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/0192—Details of mounting arrangements with external bearing means
    • 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
    • F17C2221/01—Pure fluids
    • F17C2221/013—Carbone dioxide
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • 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
    • 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
    • F17C2270/0107—Wall panels

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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)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

A liquefied gas tank comprises: a tank body in the interior of which an accommodation space is formed; an intermediate layer that covers the inner surface of the tank body, the intermediate layer being formed from a heat-blocking material having lower heat conductivity than the tank body; and a thin film layer that covers the inner surface of the intermediate layer, the liquefied gas being capable of being accommodated in a liquid-tight manner on the inner side of the thin film layer.

Description

DESCRIPTION
Title of Invention
LIQUEFIED GAS TANK AND SHIP
Technical Field
[0001]
The present disclosure relates to a liquefied gas
tank and a ship.
This application claims the right of priority based
on Japanese Patent Application No. 2020-027061 filed with
the Japan Patent Office on February 20, 2020, the content
of which is incorporated herein by reference.
Background Art
[00021
PTL 1 discloses a ship that carries liquefied gas
such as liquefied natural gas and includes a cargo tank
for liquefied gas, which is provided with a tank body for
storing the liquefied gas and a heat insulating material
provided so as to cover the outer peripheral surface of
the tank body.
Citation List
Patent Literature
[00031
[PTL 1] Japanese Patent No. 6364694
Summary of Invention
Technical Problem
[0004]
In the cargo tank stated in PTL 1, since low
temperature and high-pressure liquefied gas comes into
contact with the inner surface of the tank body, the tank
needs to have both strength against the pressure of the
high-pressure liquefied gas and toughness (low-temperature
toughness) against the low-temperature liquefied gas. In
such a tank, for example, if an attempt is made to
increase the diameter of the tank in order to increase the
volume of the tank, there is a case where it is necessary
to increase the wall thickness of the tank body. However,
an increase in the wall thickness of the tank body leads
to an increase in material cost. Further, if an attempt
is made to secure strength while suppressing an increase
in the wall thickness of the tank body, a higher-strength
material is used, which also leads to an increase in
material cost.
[0005]
The present disclosure has been made to solve the
above problems, and has an object to provide a liquefied
gas tank and a ship, in which it is possible to increase
the capacity of a tank while suppressing an increase in
cost.
Solution to Problem
[00061
In order to solve the above problems, a liquefied
gas tank according to the present disclosure includes a
tank body, an intermediate layer, and a thin film layer.
The tank body has an accommodation space formed in an
interior thereof. The intermediate layer covers the inner
surface of the tank body. The intermediate layer is
formed of a heat-blocking material having thermal
conductivity smaller than that of the tank body. The thin
film layer covers the inner surface of the intermediate
layer. The thin film layer is capable of accommodating
liquefied gas in a liquid-tight manner on the inside
thereof.
[00071
A ship according to the present disclosure includes
a hull, and the liquefied gas tank as described above,
which is provided in the hull.
Advantageous Effects of Invention
[00081
According to the liquefied gas tank and the ship of
the present disclosure, it is possible to increase the
capacity of the tank while suppressing an increase in cost.
Brief Description of Drawings
[0009]
Fig. 1 is a plan view showing an overall
configuration of a ship according to an embodiment of the
present disclosure.
Fig. 2 is a semi-cross-sectional view of a liquefied
gas tank provided in the ship according to the embodiment
of the present disclosure as viewed from a bow-stern
direction.
Fig. 3 is a cross-sectional view showing a
displacement absorbing portion formed in a thin film layer
of the liquefied gas tank according to the embodiment of
the present disclosure.
Fig. 4 is a plan view showing an overall
configuration of a ship according to a modification
example of the embodiment of the present disclosure.
Description of Embodiments
[0010]
Fig. 1 is a plan view showing an overall
configuration of a ship according to an embodiment of the
present disclosure. Fig. 2 is a semi-cross-sectional view
of a liquefied gas provided in the ship as viewed from a
bow-stern direction.
As shown in Figs. 1 and 2, a ship 1A of the
embodiment of the present disclosure carries liquefied gas
such as liquefied natural gas, liquefied petroleum gas, liquid carbon dioxide, or liquid ammonia. The ship 1A includes at least a hull 2 and a liquefied gas tank 20A.
[0011]
The hull 2 has a pair of broadsides 3A and 3B, a
ship bottom 4, and an upper deck 5, which form an outer
shell thereof. The broadsides 3A and 3B are provided with
a pair of broadside outer plates forming the left and
right broadsides, respectively. The ship bottom 4 is
provided with a ship bottom outer plate connecting the
broadsides 3A and 3B. Due to the pair of broadsides 3A
and 3B and the ship bottom 4, the outer shell of the hull
2 has a U-shape in a cross section orthogonal to a bow
stern direction Da. The upper deck 5 is an all-deck that
is exposed to the outside. A superstructure 7 having an
accommodation space is formed on the upper deck 5 on the
stern 2b side in the hull 2.
[00121
A cargo tank storage compartment (a hold) 8 is
formed on the bow 2a side with respect to the
superstructure 7 in the hull 2. The cargo tank storage
compartment 8 is recessed toward the ship bottom 4 below
the upper deck 5 and is open upward.
[00131
A plurality of liquefied gas tanks 20A are provided
in the cargo tank storage compartment 8. The plurality of liquefied gas tanks 20A are disposed side by side in the bow-stern direction Da. An upper portion 20a of each of the liquefied gas tanks 20A protrudes to the upper side than the upper deck 5 of the hull 2. The upper portion a of each of the plurality of liquefied gas tanks 20A is covered with a tank cover 25 provided on the upper deck 5.
An external heat insulating material (not shown) that
suppresses heat input from the outside may be provided
between the inner surface of the tank cover 25 and the
outer surface of the liquefied gas tank 20A.
[0014]
The liquefied gas tank 20A is supported by a skirt
30. The skirt 30 has a cylindrical shape extending in an
up-down direction Dv, and a lower end portion thereof is
fixed to a foundation deck portion 9 provided at a bottom
portion of the cargo tank storage compartment 8.
[00151
The liquefied gas tank 20A accommodates the
liquefied gas in an accommodation space S in the interior
thereof. When the temperature and pressure of the
liquefied gas in a state of being accommodated in the
accommodation space S are exemplified, in the case of
liquefied natural gas, a temperature of -163°C and
pressure of 4 bar, in the case of liquefied petroleum gas,
a temperature of -50°C and pressure of 18 bar, in the case of liquid carbon dioxide, a temperature of -35°C and pressure of 19 bar, and in the case of liquid ammonia, a temperature of -50°C and pressure of 5 bar can be given as examples.
[00161
As shown in Fig. 2, the liquefied gas tank 20A
includes a tank body 21A, an intermediate layer 22, and a
thin film layer 23.
The tank body 21A forms the outer shell of the
liquefied gas tank 20A. The tank body 21A has the
accommodation space S formed in the interior thereof. In
this embodiment, the tank body 21A has a spherical shape.
The tank body 21A includes a lower half portion 21a and an
upper half portion 21b.
[0017]
The lower half portion 21a has a hemispherical shape
at a lower portion of the tank body 21A. In the lower
half portion 21a, the diameter dimension centered on an
axis a gradually increases from the lower side toward the
upper side. The lower half portion 21a has a semi
spherical shape having a constant radius of curvature.
Here, the axis a is a virtual line extending in the up
down direction Dv through the center of the tank body 21A
and eventually the liquefied gas tank 20A.
In the present example, the axis a of the tank body
21A is disposed so as to be located at the center in the
bow-stern direction Da of the hull 2 and the center in a
ship width direction Dw (refer to Fig. 1). However, in
the present invention, the disposition of the liquefied
gas tank 20A in the hull 2 is not limited to this case.
[0018]
The upper half portion 21b is provided on the upper
side of the lower half portion 21a. The upper half
portion 21b has a hemispherical shape at an upper portion
of the tank body 21A. The diameter dimension of the upper
half portion 21b gradually decreases from the lower side
toward the upper side. In this embodiment, the upper half
portion 21b may have a semi-spherical shape having a
constant radius of curvature, or may be formed such that
the radius of curvature gradually increases from the lower
side toward the upper side.
The tank body 21A is not limited to the shape shown
above. The tank body 21A may be configured to include a
cylindrical portion (not shown) or the like between the
upper half portion 21b and the lower half portion 21a.
[0019]
The tank body 21A has a thickness Tl in a range of
to 70 mm, and preferably 40 to 60 mm, for example. As
a material for forming the tank body 21A, for example, carbon manganese steel is used. In addition, an aluminum alloy, stainless steel, nickel steel, or the like can be used as the material for forming the tank body 21A.
[00201
The intermediate layer 22 is provided in the tank
body 21A. The intermediate layer 22 is provided so as to
cover the entire inner surface 21f of the tank body 21A.
The intermediate layer 22 is formed of a heat-blocking
material 22m having thermal conductivity smaller than that
of the tank body 21A. The heat-blocking material 22m in
this embodiment is concrete. As the heat-blocking
material 22m forming the intermediate layer 22, in
addition to concrete, for example, pearlite, wood, phenol
resin, or the like can be exemplified. Further, the
intermediate layer may be formed by combining a plurality
of materials. Further, in a case where pearlite or the
like is used for the intermediate layer 22, or the like,
pearlite or the like may be enclosed in a wooden box or
the like in order to maintain the shape of the
intermediate layer 22.
[00211
A thickness T2 of the intermediate layer 22 is
larger than, for example, the thickness Tl of the tank
body 21A. The preferred range of the thickness T2 of the intermediate layer 22 is, for example, 100 to 500 mm, and preferably 150 to 250 mm.
[00221
The thin film layer 23 is formed, for example, in
the shape of a spherical bag as a whole so as to cover an
inner surface 22f of the intermediate layer 22. The thin
film layer 23 is capable of accommodating the liquefied
gas in a liquid-tight manner on the inside thereof. A
thickness T3 of the thin film layer 23 is thinner than the
thickness T1 of the tank body 21A.
[00231
As a material for forming the thin film layer 23,
for example, stainless steel is used. As the material for
forming the thin film layer 23, in addition, an Invar
material (nickel steel) or the like can be given as an
example. The material for forming the thin film layer 23
is selected according to the type of the liquefied gas
that is accommodated in the accommodation space S of the
liquefied gas tank 20A. For example, in a case where
liquid ammonia is accommodated in the accommodation space
S, as the material for forming the thin film layer 23,
stainless steel is used so as to suppress a chemical
reaction due to the contact between the liquid ammonia and
the thin film layer 23.
The thickness T3 of the thin film layer 23 is
smaller than the thickness T1 of the tank body 21A. The
thickness T3 of the thin film layer 23 is preferably in a
range of 0.5 mm to 2 mm, and more preferably in a range of
about 0.7 to 1.2 mm, for example.
[00241
Fig. 3 is a cross-sectional view showing a
displacement absorbing portion formed in the thin film
layer of the liquefied gas tank.
As shown in Fig. 3, the thin film layer 23 is not
bonded to the inner surface 22f of the intermediate layer
22, and can be independently displaced with respect to the
intermediate layer 22 at the time of thermal deformation
or the like. The thin film layer 23 is provided with a
deformation absorbing portion 27 that absorbs the thermal
deformation. The deformation absorbing portion 27 is
provided, for example, in a part in a circumferential
direction Dc of the thin film layer 23 in the cross
section shown in Fig. 3. The deformation absorbing
portion 27 is formed by bending a part in the
circumferential direction Dc of the thin film layer 23 in
a bellows shape alternately to the outer side and the
inner side in a radial direction Dr of the liquefied gas
tank 20A. The deformation absorbing portion 27 is formed,
for example, in a ring shape around a center 01 of the liquefied gas tank 20A, and absorbs thermal contraction that occurs in the thin film layer 23 in a case where the liquefied gas is accommodated in the liquefied gas tank
A. More specifically, when the thin film layer 23
thermally contracts in the circumferential direction Dc,
the bellows-shaped deformation absorbing portion 27 is
deformed so as to expand. The deformation absorbing
portion 27 absorbs the thermal contraction of the thin
film layer 23, so that excessive thermal stress is not
generated in the thin film layer 23. The deformation
absorbing portions 27 may be provided at a plurality of
locations of one thin film layer 23.
[00251
An opening portion (not shown) formed to penetrate
the tank body 21A, the intermediate layer 22, and the thin
film layer 23 is formed in the liquefied gas tank 20A as
described above. The liquefied gas is taken in and out
through the opening portion (not shown).
[00261
In the liquefied gas tank 20A of the above
embodiment, the liquefied gas tank 20A includes the tank
body 21A, the intermediate layer 22, and the thin film
layer 23. The tank body 21A has the accommodation space S
formed in an interior thereof. The intermediate layer 22
is formed of the heat-blocking material 22m having small thermal conductivity. The intermediate layer 22 covers the inner surface 21f of the tank body 21A and forms the accommodation space in the interior thereof. The thin film layer 23 covers the inner surface 22f of the intermediate layer 22 and has the thickness T3 thinner than the thickness of the tank body 21A. The thin film layer 23 is capable of accommodating the liquefied gas in a liquid-tight manner on an inside thereof.
[0027]
According to the liquefied gas tank 20A of the above
embodiment, due to the thin film layer 23, it is possible
to secure liquid-tightness with respect to the liquefied
gas accommodated on the inside thereof. The pressure due
to the liquefied gas accommodated on the inside of the
thin film layer 23 is received by the intermediate layer
22 and the tank body 21A through the thin film layer 23.
The tank body 21A functions as a strength member of the
liquefied gas tank 20A that receives the internal pressure
due to the liquefied gas. In this way, the out-of-plane
deformation of the thin film layer 23 can be suppressed.
[00281
Further, the heat transfer from the low-temperature
liquefied gas to the tank body 21A can be suppressed by
the heat-blocking material 22m, and thus a decrease in the
temperature of the tank body 21A can be suppressed. In this way, the requirement for low-temperature toughness for the tank body 21A is alleviated. In addition, since the requirement relating to the low-temperature toughness of the tank body 21A is alleviated, it becomes possible to use a cheaper material for the tank body 21A. Therefore, even in a case where the thickness of the tank body 21A is increased, it is possible to suppress an increase in cost as compared with the case of using a material having low temperature toughness, and therefore, the tank body 21A can be increased in size at a lower cost.
[00291
Further, due to the heat-blocking material 22m
having thermal conductivity smaller than that of the tank
body 21A, the infiltration of heat from the outside of the
liquefied gas tank 20A can be suppressed, and thus a
temperature rise of the liquefied gas can be suppressed.
In this way, the amount of an external heat-blocking
material (not shown) that is installed outside the
liquefied gas tank 20A can be reduced or canceled, and
thus it becomes possible to suppress a manufacturing cost.
[00301
The intermediate layer 22 of the liquefied gas tank
A of the above embodiment is formed of concrete.
In this manner, the intermediate layer 22 is formed
of concrete, so that in a case where the pressure due to the liquefied gas acts on the intermediate layer 22 through the thin film layer 23, the pressure can be firmly received.
[00311
In the liquefied gas tank 20A of the above
embodiment, the thin film layer 23 is independently
displaceable with respect to the intermediate layer 22 at
the time of thermal deformation.
Therefore, in a case where thermal contraction
occurs in the thin film layer 23 according to a
temperature change due to the liquefied gas, the thin film
layer 23 is not constrained by the intermediate layer 22,
and displacement due to the thermal contraction can be
allowed. In this way, it is possible to suppress the
occurrence of stress in the thin film layer 23 due to the
thermal contraction.
[00321
In the liquefied gas tank 20A of the above
embodiment, the thin film layer 23 is provided with the
deformation absorbing portion 27 that absorbs thermal
deformation.
Therefore, in a case where thermal contraction
occurs in the thin film layer 23 according to a
temperature change due to the liquefied gas, the thermal deformation of the thin film layer 23 can be absorbed by the deformation absorbing portion 27.
[00331
In the liquefied gas tank 20A of the above
embodiment, the thin film layer 23 is formed of stainless
steel or an Invar material.
In this manner, stainless steel or an invar material
is used for the thin film layer 23, so that, for example,
even in a case where, as the liquefied gas, liquid ammonia
or the like is accommodated in the liquefied gas tank 20A,
it is possible to suppress the occurrence of a chemical
reaction due to the contact between the liquefied gas and
the thin film layer 23.
[00341
The ship 1A of the above embodiment includes the
hull 2 and the liquefied gas tank 20A provided in the hull
2.
According to the ship 1A, since the capacity of the
liquefied gas tank 20A can be increased, the number of
liquefied gas tanks 20A to be mounted can be reduced.
Therefore, it becomes possible to suppress an increase in
the cost of the ship 1A.
[00351
In the above embodiment, the liquefied gas tank 20A
has a spherical shape. However, there is no limitation thereto. For example, as in a modification example shown in Fig. 4, a liquefied gas tank 20B of a ship 1B can also be formed in a cylindrical shape. The liquefied gas tank
B in this modification example illustrates a case where
it has a cylindrical shape extending in the horizontal
direction. The liquefied gas tank 20B includes a tank
body 21B, the intermediate layer 22, and the thin film
layer 23, similarly to the liquefied gas tank 20A of the
above embodiment. The tank body 21B integrally has a
tubular portion 21d and two hemispherical portions 21e.
The tubular portion 21d extends in the horizontal
direction and has a constant diameter dimension. The
tubular portion 21d is formed in an intermediate portion
in the axial direction of the tank body 21B. The
hemispherical portions 21e are provided at both ends in a
center axis direction of the tubular portion 21d. Each of
the hemispherical portions 21e is provided at each of both
ends in the center axis direction of the tubular portion
21d, and closes each of openings at both ends of the
tubular portion 21d.
[00361
Although the embodiment of the present disclosure
has been described in detail above with reference to the
drawings, the specific configuration is not limited to
this embodiment and also includes design changes or the like within a scope which does not deviate from the gist of the present disclosure.
In the above embodiment and the above modification
example, a configuration is adopted in which each of the
liquefied gas tanks 20A and 20B is provided in the cargo
tank storage compartment 8 formed in the hull 2. However,
there is no limitation thereto, and for example, the whole
or a part of each of the liquefied gas tanks 20A and 20B
may be provided on the upper deck 5 or may be provided
below the upper deck 5.
[0037]
In the above embodiment, the liquefied gas tank 20A
or 20B is provided in the ship 1A or 1B. However, there
is no limitation thereto. For example, the liquefied gas
tank 20A or 20B may be installed in a place other than a
ship, such as an offshore floating body.
[00381
<Additional Remark>
The liquefied gas tank 20A or 20B and the ship 1A or
lB described in each embodiment are grasped as follows,
for example.
[00391
(1) The liquefied gas tank 20A or 20B according to a
first aspect includes the tank body 21A or 21B having the
accommodation space S formed in the interior thereof, the intermediate layer 22 that covers the inner surface 21f of the tank body 21A or 21B and is formed of the heat blocking material 22m having thermal conductivity smaller than that of the tank body 21A or 21B, and the thin film layer 23 that covers the inner surface 22f of the intermediate layer 22, has the thickness T3 thinner than the thickness of the tank body 21A or 21B, and is capable of accommodating liquefied gas in a liquid-tight manner on the inside thereof.
[0040]
In the liquefied gas tank 20A or 20B, due to the
thin film layer 23, liquid-tightness with respect to the
liquefied gas that is accommodated on the inside thereof
is secured. The pressure due to the liquefied gas
accommodated on the inside of the thin film layer 23 is
received by the intermediate layer 22 and the tank body
21A or 21B through the thin film layer 23. The tank body
21A or 21B is formed of a metal material and has the
thickness T1 larger than the thickness of the thin film
layer 23, and therefore, the tank body 21A or 21B
functions as a strength member of the liquefied gas tank
A or 20B that receives the internal pressure due to the
liquefied gas. In this way, the out-of-plane deformation
of the thin film layer 23 can be suppressed.
Further, the heat transfer from the low-temperature
liquefied gas to the tank body 21A or 21B is suppressed by
the heat-blocking material 22m, and thus a decrease in the
temperature of the tank body 21A or 21B is suppressed. In
this way, the requirement for low-temperature toughness
for the tank body 21A or 21B is alleviated. In addition,
since the requirement relating to the low-temperature
toughness is alleviated, the thickness limitation of the
tank body 21A or 21B is released, and thus it becomes
possible to increase the thickness T1 of the tank body 21A
or 21B. As a result, it becomes possible to use a cheaper
material for the tank body 21A or 21B. Further, by
increasing the thickness Ti of the tank body 21A or 21B,
it also becomes possible to increase the size of the tank
body 21A or 21B.
Further, due to the heat-blocking material 22m
having thermal conductivity smaller than that of the tank
body 21A or 21B, the infiltration of heat from the outside
of the liquefied gas tank 20A or 20B can be suppressed,
and thus a temperature rise of the low-temperature
liquefied gas can also be suppressed. In this way, the
amount of an external heat-blocking material (not shown)
that is installed outside the liquefied gas tank 20A or
B can be reduced, and thus it becomes possible to
suppress a manufacturing cost.
In this way, it becomes possible to increase the
capacity of the tank while suppressing an increase in cost.
[00411
(2) In the liquefied gas tank 20A or 20B according
to a second aspect, in the liquefied gas tank 20A or 20B
of the above (1) , the intermediate layer 22 is made of
concrete.
[00421
In this way, the intermediate layer 22 is formed of
concrete, so that in a case where the pressure due to the
liquefied gas acts on the intermediate layer 22 through
the thin film layer 23, the pressure can be firmly
received.
[00431
(3) In the liquefied gas tank 20A or 20B according
to a third aspect, in the liquefied gas tank 20A or 20B of
the above (1) or (2), the thin film layer 23 is capable of
being independently displaced with respect to the
intermediate layer 22 at the time of thermal deformation.
[0044]
In this way, in a case where thermal contraction
occurs in the thin film layer 23 according to a
temperature change due to the liquefied gas, the thin film
layer 23 is not constrained by the intermediate layer 22,
and displacement due to the thermal contraction can be allowed. In this way, it is possible to suppress the occurrence of stress in the thin film layer 23 due to the thermal contraction.
[00451
(4) In the liquefied gas tank 20A or 20B according
to a fourth aspect, in the liquefied gas tank 20A or 20B
of the above (3), the thin film layer 23 includes the
deformation absorbing portion 27 that absorbs the thermal
deformation.
[00461
In this way, in a case where thermal contraction
occurs in the thin film layer 23 according to a
temperature change due to the liquefied gas, the thermal
deformation of the thin film layer 23 can be absorbed by
the deformation absorbing portion 27.
[00471
(5) In the liquefied gas tank 20A or 20B according
to a fifth aspect, in the liquefied gas tank 20A or 20B of
any one of the above (1) to (4), the thin film layer 23 is
made of stainless steel or an Invar material...
[00481
In this way, when stainless steel or an invar
material is used for the thin film layer 23, for example,
even in a case where, as the liquefied gas, liquid ammonia
or the like is accommodated in the liquefied gas tank 20A or 20B, it is possible to suppress the occurrence of a chemical reaction due to the contact between the liquefied gas and the thin film layer 23.
[00491
(6) The ship 1A or 1B according to a sixth aspect
includes the hull 2, and the liquefied gas tank 20A or 20B
of any one of the above (1) to (5), which is provided in
the hull 2.
[00501
In this way, it becomes possible to provide the ship
1A or 1B provided with the liquefied gas tank 20A or 20B
in which it is possible to increase the capacity of the
tank while suppressing an increase in cost.
Industrial Applicability
[00511
According to the liquefied gas tank and the ship of
the present disclosure, it is possible to increase the
capacity of the tank while suppressing an increase in cost.
Reference Signs List
[00521
1A, 1B: ship
2: hull
2a: bow
2b: stern
3A, 3B: broadside
4: ship bottom
: upper deck
7: superstructure
8: cargo tank storage compartment
9: foundation deck portion
A, 20B: liquefied gas tank
a: upper portion
21A, 21B: tank body
21a: lower half portion
21b: upper half portion
21d: tubular portion
21e: hemispherical portion
21f: inner surface
22: intermediate layer
22f: inner surface
22m: heat-blocking material
23: thin film layer
: tank cover
27: deformation absorbing portion
: skirt
S: accommodation space

Claims (6)

  1. Claims
    [Claim 1]
    A liquefied gas tank comprising:
    a tank body having an accommodation space formed in
    an interior thereof;
    an intermediate layer that covers an inner surface
    of the tank body and is formed of a heat-blocking material
    having thermal conductivity smaller than thermal
    conductivity of the tank body; and
    a thin film layer that covers an inner surface of
    the intermediate layer and is capable of accommodating
    liquefied gas in a liquid-tight manner on an inside
    thereof.
  2. [Claim 2]
    The liquefied gas tank according to claim 1, wherein
    the intermediate layer is made of concrete.
  3. [Claim 3]
    The liquefied gas tank according to claim 1 or 2,
    wherein the thin film layer is capable of being
    independently displaced with respect to the intermediate
    layer at the time of thermal deformation.
  4. [Claim 4]
    The liquefied gas tank according to claim 3, wherein
    the thin film layer includes a deformation absorbing
    portion that absorbs the thermal deformation.
  5. [Claim 5]
    The liquefied gas tank according to any one of
    claims 1 to 4, wherein the thin film layer is made of
    stainless steel or an Invar material.
  6. [Claim 6]
    A ship comprising:
    a hull; and
    the liquefied gas tank according to any one of
    claims 1 to 5, which is provided in the hull.
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JP2021131134A (en) 2021-09-09
CN115038651A (en) 2022-09-09
WO2021166435A1 (en) 2021-08-26
EP4089313A4 (en) 2023-03-15

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