EP4089313A1 - Liquefied gas tank and ship - Google Patents
Liquefied gas tank and ship Download PDFInfo
- Publication number
- EP4089313A1 EP4089313A1 EP20919791.2A EP20919791A EP4089313A1 EP 4089313 A1 EP4089313 A1 EP 4089313A1 EP 20919791 A EP20919791 A EP 20919791A EP 4089313 A1 EP4089313 A1 EP 4089313A1
- Authority
- EP
- European Patent Office
- 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.)
- Pending
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Classifications
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- 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
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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
- B63B25/14—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed pressurised
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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
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- 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
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- 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
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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
- 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
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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
- B63B2231/00—Material used for some parts or elements, or for particular purposes
- B63B2231/02—Metallic materials
- B63B2231/04—Irons, steels or ferrous alloys
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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
- B63B2231/00—Material used for some parts or elements, or for particular purposes
- B63B2231/60—Concretes
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- 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
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- 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
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- 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)
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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)
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- 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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- 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
Definitions
- the present disclosure relates to a liquefied gas tank and a ship.
- 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.
- 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.
- the tank 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.
- the 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.
- an increase in the wall thickness of the tank body leads to an increase in material cost.
- a higher-strength material is used, which also leads to an increase in material cost.
- 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.
- a liquefied gas tank 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.
- a ship according to the present disclosure includes a hull, and the liquefied gas tank as described above, which is provided in the hull.
- 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.
- 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.
- 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.
- 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.
- 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 20a 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.
- 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.
- the liquefied gas tank 20A accommodates the liquefied gas in an accommodation space S in the interior thereof.
- 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.
- 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.
- the tank body 21A has a spherical shape.
- the tank body 21A includes a lower half portion 21a and an upper half portion 21b.
- the lower half portion 21a has a hemispherical shape at a lower portion of the tank body 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.
- 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.
- 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 ).
- the disposition of the liquefied gas tank 20A in the hull 2 is not limited to this case.
- 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.
- 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.
- the tank body 21A has a thickness T1 in a range of 10 to 70 mm, and preferably 40 to 60 mm, for example.
- a material for forming the tank body 21A for example, carbon manganese steel is used.
- an aluminum alloy, stainless steel, nickel steel, or the like can be used as the material for forming the tank body 21A.
- 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.
- 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.
- a thickness T2 of the intermediate layer 22 is larger than, for example, the thickness T1 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.
- 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.
- the material for forming the thin film layer 23 for example, stainless steel is used.
- 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.
- Fig. 3 is a cross-sectional view showing a displacement absorbing portion formed in the thin film layer of the liquefied gas tank.
- 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 O1 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 20A. 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.
- 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).
- 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.
- 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.
- 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.
- the requirement for low-temperature toughness for the tank body 21A is alleviated.
- 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.
- the intermediate layer 22 of the liquefied gas tank 20A of the above embodiment is formed of concrete.
- 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.
- the thin film layer 23 is independently displaceable with respect to the intermediate layer 22 at the time of thermal deformation.
- 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.
- the thin film layer 23 is provided with the deformation absorbing portion 27 that absorbs thermal deformation.
- the thermal deformation of the thin film layer 23 can be absorbed by the deformation absorbing portion 27.
- the thin film layer 23 is formed of stainless steel or an Invar material.
- 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.
- the ship 1A of the above embodiment includes the hull 2 and the liquefied gas tank 20A provided in the hull 2.
- 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.
- the liquefied gas tank 20A has a spherical shape.
- a liquefied gas tank 20B of a ship 1B can also be formed in a cylindrical shape.
- the liquefied gas tank 20B 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.
- each of the liquefied gas tanks 20A and 20B is provided in the cargo tank storage compartment 8 formed in the hull 2.
- 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.
- the liquefied gas tank 20A or 20B is provided in the ship 1A or 1B.
- the liquefied gas tank 20A or 20B may be installed in a place other than a ship, such as an offshore floating body.
- the liquefied gas tank 20A or 20B and the ship 1A or 1B described in each embodiment are grasped as follows, for example.
- 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 20A 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.
- 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.
- the requirement for low-temperature toughness for the tank body 21A or 21B 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.
- by increasing the thickness T1 of the tank body 21A or 21B it also becomes possible to increase the size of the tank body 21A or 21B.
- 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 20B can be reduced, and thus it becomes possible to suppress a manufacturing cost.
- the intermediate layer 22 is made of concrete.
- 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.
- the thin film layer 23 is capable of being independently displaced with respect to the intermediate layer 22 at the time of thermal deformation.
- 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.
- the thin film layer 23 includes the deformation absorbing portion 27 that absorbs the thermal deformation.
- the thermal deformation of the thin film layer 23 can be absorbed by the deformation absorbing portion 27.
- the thin film layer 23 is made of stainless steel or an Invar material...
- 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.
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Abstract
Description
- 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 - 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.
- [PTL 1]
Japanese Patent No. 6364694 - 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.
- 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.
- 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.
- A ship according to the present disclosure includes a hull, and the liquefied gas tank as described above, which is provided in the hull.
- 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.
-
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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. -
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 and2 , aship 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. Theship 1A includes at least ahull 2 and a liquefiedgas tank 20A. - The
hull 2 has a pair ofbroadsides ship bottom 4, and anupper deck 5, which form an outer shell thereof. Thebroadsides ship bottom 4 is provided with a ship bottom outer plate connecting thebroadsides broadsides ship bottom 4, the outer shell of thehull 2 has a U-shape in a cross section orthogonal to a bow-stern direction Da. Theupper deck 5 is an all-deck that is exposed to the outside. Asuperstructure 7 having an accommodation space is formed on theupper deck 5 on thestern 2b side in thehull 2. - A cargo tank storage compartment (a hold) 8 is formed on the
bow 2a side with respect to thesuperstructure 7 in thehull 2. The cargotank storage compartment 8 is recessed toward theship bottom 4 below theupper deck 5 and is open upward. - A plurality of
liquefied gas tanks 20A are provided in the cargotank storage compartment 8. The plurality ofliquefied gas tanks 20A are disposed side by side in the bow-stern direction Da. Anupper portion 20a of each of theliquefied gas tanks 20A protrudes to the upper side than theupper deck 5 of thehull 2. Theupper portion 20a of each of the plurality ofliquefied gas tanks 20A is covered with atank cover 25 provided on theupper deck 5. An external heat insulating material (not shown) that suppresses heat input from the outside may be provided between the inner surface of thetank cover 25 and the outer surface of theliquefied gas tank 20A. - The
liquefied gas tank 20A is supported by askirt 30. Theskirt 30 has a cylindrical shape extending in an up-down direction Dv, and a lower end portion thereof is fixed to afoundation deck portion 9 provided at a bottom portion of the cargotank storage compartment 8. - 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. - As shown in
Fig. 2 , theliquefied gas tank 20A includes atank body 21A, anintermediate layer 22, and athin film layer 23. - The
tank body 21A forms the outer shell of theliquefied gas tank 20A. Thetank body 21A has the accommodation space S formed in the interior thereof. In this embodiment, thetank body 21A has a spherical shape. Thetank body 21A includes alower half portion 21a and anupper half portion 21b. - The
lower half portion 21a has a hemispherical shape at a lower portion of thetank body 21A. In thelower half portion 21a, the diameter dimension centered on an axis a gradually increases from the lower side toward the upper side. Thelower 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 thetank body 21A and eventually theliquefied 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 thehull 2 and the center in a ship width direction Dw (refer toFig. 1 ). However, in the present invention, the disposition of theliquefied gas tank 20A in thehull 2 is not limited to this case. - The
upper half portion 21b is provided on the upper side of thelower half portion 21a. Theupper half portion 21b has a hemispherical shape at an upper portion of thetank body 21A. The diameter dimension of theupper half portion 21b gradually decreases from the lower side toward the upper side. In this embodiment, theupper 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. Thetank body 21A may be configured to include a cylindrical portion (not shown) or the like between theupper half portion 21b and thelower half portion 21a. - The
tank body 21A has a thickness T1 in a range of 10 to 70 mm, and preferably 40 to 60 mm, for example. As a material for forming thetank 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 thetank body 21A. - The
intermediate layer 22 is provided in thetank body 21A. Theintermediate layer 22 is provided so as to cover the entireinner surface 21f of thetank body 21A. Theintermediate layer 22 is formed of a heat-blockingmaterial 22m having thermal conductivity smaller than that of thetank body 21A. The heat-blockingmaterial 22m in this embodiment is concrete. As the heat-blockingmaterial 22m forming theintermediate 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 theintermediate 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 theintermediate layer 22. - A thickness T2 of the
intermediate layer 22 is larger than, for example, the thickness T1 of thetank body 21A. The preferred range of the thickness T2 of theintermediate layer 22 is, for example, 100 to 500 mm, and preferably 150 to 250 mm. - The
thin film layer 23 is formed, for example, in the shape of a spherical bag as a whole so as to cover aninner surface 22f of theintermediate layer 22. Thethin film layer 23 is capable of accommodating the liquefied gas in a liquid-tight manner on the inside thereof. A thickness T3 of thethin film layer 23 is thinner than the thickness T1 of thetank body 21A. - As a material for forming the
thin film layer 23, for example, stainless steel is used. As the material for forming thethin film layer 23, in addition, an Invar material (nickel steel) or the like can be given as an example. The material for forming thethin film layer 23 is selected according to the type of the liquefied gas that is accommodated in the accommodation space S of the liquefiedgas tank 20A. For example, in a case where liquid ammonia is accommodated in the accommodation space S, as the material for forming thethin film layer 23, stainless steel is used so as to suppress a chemical reaction due to the contact between the liquid ammonia and thethin film layer 23. - The thickness T3 of the
thin film layer 23 is smaller than the thickness T1 of thetank body 21A. The thickness T3 of thethin 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. -
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 , thethin film layer 23 is not bonded to theinner surface 22f of theintermediate layer 22, and can be independently displaced with respect to theintermediate layer 22 at the time of thermal deformation or the like. Thethin film layer 23 is provided with adeformation absorbing portion 27 that absorbs the thermal deformation. Thedeformation absorbing portion 27 is provided, for example, in a part in a circumferential direction Dc of thethin film layer 23 in the cross section shown inFig. 3 . Thedeformation absorbing portion 27 is formed by bending a part in the circumferential direction Dc of thethin film layer 23 in a bellows shape alternately to the outer side and the inner side in a radial direction Dr of the liquefiedgas tank 20A. Thedeformation absorbing portion 27 is formed, for example, in a ring shape around a center O1 of the liquefiedgas tank 20A, and absorbs thermal contraction that occurs in thethin film layer 23 in a case where the liquefied gas is accommodated in the liquefiedgas tank 20A. More specifically, when thethin film layer 23 thermally contracts in the circumferential direction Dc, the bellows-shapeddeformation absorbing portion 27 is deformed so as to expand. Thedeformation absorbing portion 27 absorbs the thermal contraction of thethin film layer 23, so that excessive thermal stress is not generated in thethin film layer 23. Thedeformation absorbing portions 27 may be provided at a plurality of locations of onethin film layer 23. - An opening portion (not shown) formed to penetrate the
tank body 21A, theintermediate layer 22, and thethin film layer 23 is formed in the liquefiedgas tank 20A as described above. The liquefied gas is taken in and out through the opening portion (not shown). - In the liquefied
gas tank 20A of the above embodiment, the liquefiedgas tank 20A includes thetank body 21A, theintermediate layer 22, and thethin film layer 23. Thetank body 21A has the accommodation space S formed in an interior thereof. Theintermediate layer 22 is formed of the heat-blockingmaterial 22m having small thermal conductivity. Theintermediate layer 22 covers theinner surface 21f of thetank body 21A and forms the accommodation space in the interior thereof. Thethin film layer 23 covers theinner surface 22f of theintermediate layer 22 and has the thickness T3 thinner than the thickness of thetank body 21A. Thethin film layer 23 is capable of accommodating the liquefied gas in a liquid-tight manner on an inside thereof. - According to the liquefied
gas tank 20A of the above embodiment, due to thethin 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 thethin film layer 23 is received by theintermediate layer 22 and thetank body 21A through thethin film layer 23. Thetank body 21A functions as a strength member of the liquefiedgas tank 20A that receives the internal pressure due to the liquefied gas. In this way, the out-of-plane deformation of thethin film layer 23 can be suppressed. - Further, the heat transfer from the low-temperature liquefied gas to the
tank body 21A can be suppressed by the heat-blockingmaterial 22m, and thus a decrease in the temperature of thetank body 21A can be suppressed. In this way, the requirement for low-temperature toughness for thetank body 21A is alleviated. In addition, since the requirement relating to the low-temperature toughness of thetank body 21A is alleviated, it becomes possible to use a cheaper material for thetank body 21A. Therefore, even in a case where the thickness of thetank 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, thetank body 21A can be increased in size at a lower cost. - Further, due to the heat-blocking
material 22m having thermal conductivity smaller than that of thetank body 21A, the infiltration of heat from the outside of the liquefiedgas 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 liquefiedgas tank 20A can be reduced or canceled, and thus it becomes possible to suppress a manufacturing cost. - The
intermediate layer 22 of the liquefiedgas tank 20A 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 theintermediate layer 22 through thethin film layer 23, the pressure can be firmly received. - In the liquefied
gas tank 20A of the above embodiment, thethin film layer 23 is independently displaceable with respect to theintermediate 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, thethin film layer 23 is not constrained by theintermediate 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 thethin film layer 23 due to the thermal contraction. - In the liquefied
gas tank 20A of the above embodiment, thethin film layer 23 is provided with thedeformation 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 thethin film layer 23 can be absorbed by thedeformation absorbing portion 27. - In the liquefied
gas tank 20A of the above embodiment, thethin 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 liquefiedgas tank 20A, it is possible to suppress the occurrence of a chemical reaction due to the contact between the liquefied gas and thethin film layer 23. - The
ship 1A of the above embodiment includes thehull 2 and the liquefiedgas tank 20A provided in thehull 2. - According to the
ship 1A, since the capacity of the liquefiedgas tank 20A can be increased, the number of liquefiedgas tanks 20A to be mounted can be reduced. Therefore, it becomes possible to suppress an increase in the cost of theship 1A. - 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 inFig. 4 , a liquefiedgas tank 20B of aship 1B can also be formed in a cylindrical shape. The liquefiedgas tank 20B in this modification example illustrates a case where it has a cylindrical shape extending in the horizontal direction. The liquefiedgas tank 20B includes atank body 21B, theintermediate layer 22, and thethin film layer 23, similarly to the liquefiedgas tank 20A of the above embodiment. Thetank body 21B integrally has atubular portion 21d and twohemispherical portions 21e. Thetubular portion 21d extends in the horizontal direction and has a constant diameter dimension. Thetubular portion 21d is formed in an intermediate portion in the axial direction of thetank body 21B. Thehemispherical portions 21e are provided at both ends in a center axis direction of thetubular portion 21d. Each of thehemispherical portions 21e is provided at each of both ends in the center axis direction of thetubular portion 21d, and closes each of openings at both ends of thetubular portion 21d. - 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 tank storage compartment 8 formed in thehull 2. However, there is no limitation thereto, and for example, the whole or a part of each of the liquefiedgas tanks upper deck 5 or may be provided below theupper deck 5. - In the above embodiment, the liquefied
gas tank ship gas tank - The liquefied
gas tank ship - (1) The liquefied
gas tank tank body intermediate layer 22 that covers theinner surface 21f of thetank body material 22m having thermal conductivity smaller than that of thetank body thin film layer 23 that covers theinner surface 22f of theintermediate layer 22, has the thickness T3 thinner than the thickness of thetank body - In the liquefied
gas tank 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 thethin film layer 23 is received by theintermediate layer 22 and thetank body thin film layer 23. Thetank body thin film layer 23, and therefore, thetank body gas tank thin film layer 23 can be suppressed. - Further, the heat transfer from the low-temperature liquefied gas to the
tank body material 22m, and thus a decrease in the temperature of thetank body tank body tank body tank body tank body tank body tank body - Further, due to the heat-blocking
material 22m having thermal conductivity smaller than that of thetank body gas tank gas tank - In this way, it becomes possible to increase the capacity of the tank while suppressing an increase in cost.
- (2) In the liquefied
gas tank gas tank intermediate layer 22 is made of concrete. - 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 theintermediate layer 22 through thethin film layer 23, the pressure can be firmly received. - (3) In the liquefied
gas tank gas tank thin film layer 23 is capable of being independently displaced with respect to theintermediate layer 22 at the time of thermal deformation. - 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, thethin film layer 23 is not constrained by theintermediate 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 thethin film layer 23 due to the thermal contraction. - (4) In the liquefied
gas tank gas tank thin film layer 23 includes thedeformation absorbing portion 27 that absorbs the thermal deformation. - 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 thethin film layer 23 can be absorbed by thedeformation absorbing portion 27. - (5) In the liquefied
gas tank gas tank thin film layer 23 is made of stainless steel or an Invar material... - 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 liquefiedgas tank thin film layer 23. - (6) The
ship hull 2, and the liquefiedgas tank hull 2. - In this way, it becomes possible to provide the
ship gas tank - 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.
-
- 1A, 1B:
- ship
- 2:
- hull
- 2a:
- bow
- 2b:
- stern
- 3A, 3B:
- broadside
- 4:
- ship bottom
- 5:
- upper deck
- 7:
- superstructure
- 8:
- cargo tank storage compartment
- 9:
- foundation deck portion
- 20A, 20B:
- liquefied gas tank
- 20a:
- 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
- 25:
- tank cover
- 27:
- deformation absorbing portion
- 30:
- skirt
- S:
- accommodation space
Claims (6)
- 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; anda 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.
- The liquefied gas tank according to claim 1, wherein the intermediate layer is made of concrete.
- 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.
- The liquefied gas tank according to claim 3, wherein the thin film layer includes a deformation absorbing portion that absorbs the thermal deformation.
- 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.
- A ship comprising:a hull; andthe liquefied gas tank according to any one of claims 1 to 5, which is provided in the hull.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020027061A JP7412214B2 (en) | 2020-02-20 | 2020-02-20 | Liquefied gas tank, ship |
PCT/JP2020/048243 WO2021166435A1 (en) | 2020-02-20 | 2020-12-23 | Liquefied gas tank and ship |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4089313A1 true EP4089313A1 (en) | 2022-11-16 |
EP4089313A4 EP4089313A4 (en) | 2023-03-15 |
Family
ID=77390712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20919791.2A Pending EP4089313A4 (en) | 2020-02-20 | 2020-12-23 | Liquefied gas tank and ship |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP4089313A4 (en) |
JP (1) | JP7412214B2 (en) |
KR (1) | KR20220116271A (en) |
CN (1) | CN115038651B (en) |
AU (1) | AU2020430102A1 (en) |
WO (1) | WO2021166435A1 (en) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1108045A (en) * | 1964-06-20 | 1968-03-27 | Bridgestone Liquefied Petroleu | Cargo ship for low temperature liquefied gases |
JPS525008A (en) * | 1975-07-01 | 1977-01-14 | Mitsui Ekika Gas Kk | Construction method of a film tank used for liquefied low-temperature gas |
JPS59134431A (en) | 1983-01-20 | 1984-08-02 | Matsushita Electric Works Ltd | Solar heat-utilizing hot water supply and heater in combination |
JP2008230849A (en) * | 2006-12-06 | 2008-10-02 | Shimizu Corp | Low-temperature rock reservoir and its construction method |
JP4964346B1 (en) * | 2011-08-01 | 2012-06-27 | 大成建設株式会社 | PC ground tank construction method |
NO20120167A1 (en) * | 2012-02-17 | 2012-10-08 | Lng New Tech As | Device for containment of liquefied natural gas (LNG) |
JP6435517B2 (en) * | 2013-09-12 | 2018-12-12 | パナソニックIpマネジメント株式会社 | Insulated container with vacuum insulation |
KR20150093329A (en) * | 2014-02-07 | 2015-08-18 | 현대중공업 주식회사 | cylindrical membrane tank and ship with cylindrical membrane tank |
JP6364694B2 (en) | 2014-07-10 | 2018-08-01 | 三菱造船株式会社 | Carrier ship |
FR3061260B1 (en) * | 2016-12-26 | 2019-05-24 | Gaztransport Et Technigaz | SEALED AND THERMALLY INSULATING TANK FOR STORAGE OF A FLUID |
JP6609828B2 (en) * | 2017-07-13 | 2019-11-27 | 三菱造船株式会社 | Deck placing tank structure, ship, tank installation method and inspection method |
JP2019090507A (en) * | 2017-11-16 | 2019-06-13 | 株式会社Ihi | Device and method for determining condensed gas of tank |
JP6583940B1 (en) | 2018-08-14 | 2019-10-02 | 協和界面科学株式会社 | Foam stability measuring device, foam stability measuring method |
-
2020
- 2020-02-20 JP JP2020027061A patent/JP7412214B2/en active Active
- 2020-12-23 KR KR1020227024841A patent/KR20220116271A/en not_active Application Discontinuation
- 2020-12-23 CN CN202080095548.2A patent/CN115038651B/en active Active
- 2020-12-23 WO PCT/JP2020/048243 patent/WO2021166435A1/en unknown
- 2020-12-23 EP EP20919791.2A patent/EP4089313A4/en active Pending
- 2020-12-23 AU AU2020430102A patent/AU2020430102A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2021166435A1 (en) | 2021-08-26 |
JP2021131134A (en) | 2021-09-09 |
JP7412214B2 (en) | 2024-01-12 |
CN115038651B (en) | 2024-01-05 |
EP4089313A4 (en) | 2023-03-15 |
AU2020430102A1 (en) | 2022-08-11 |
CN115038651A (en) | 2022-09-09 |
KR20220116271A (en) | 2022-08-22 |
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