EP4174360A1 - Réservoir à double coque - Google Patents

Réservoir à double coque Download PDF

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Publication number
EP4174360A1
EP4174360A1 EP20941713.8A EP20941713A EP4174360A1 EP 4174360 A1 EP4174360 A1 EP 4174360A1 EP 20941713 A EP20941713 A EP 20941713A EP 4174360 A1 EP4174360 A1 EP 4174360A1
Authority
EP
European Patent Office
Prior art keywords
shell
inner shell
thermal insulation
double
tank
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.)
Withdrawn
Application number
EP20941713.8A
Other languages
German (de)
English (en)
Other versions
EP4174360A4 (fr
Inventor
Takahiro Yamaguchi
Satoshi HORINO
Akira Yamaguchi
Tomomi KUMANO
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.)
Kawasaki Heavy Industries Ltd
Kawasaki Motors Ltd
Original Assignee
Kawasaki Heavy Industries Ltd
Kawasaki Jukogyo KK
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 Kawasaki Heavy Industries Ltd, Kawasaki Jukogyo KK filed Critical Kawasaki Heavy Industries Ltd
Publication of EP4174360A1 publication Critical patent/EP4174360A1/fr
Publication of EP4174360A4 publication Critical patent/EP4174360A4/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/02—Large containers rigid
    • B65D88/04—Large containers rigid spherical
    • 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
    • F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/022—Laminated structures
    • 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
    • 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
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0337—Granular
    • 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
    • F17C2203/0391—Thermal insulations by vacuum
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • 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
    • F17C2221/014—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/031—Dealing with losses due to heat transfer
    • F17C2260/033—Dealing with losses due to heat transfer by enhancing insulation
    • 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

Definitions

  • the present disclosure relates to the structure of a double-shell tank including an outer shell and an inner shell.
  • Double-shell tanks have been known as tanks that store low temperature liquids.
  • the double-shell tank includes: an inner shell that practically stores a low temperature liquid; an outer shell that covers the inner shell from an outside and is located away from the inner shell by a predetermined distance; and a heat insulating layer between the inner shell and the outer shell.
  • the heat insulating layer is made of powdered thermal insulation filled in between the inner shell and the outer shell. Pearlite is used as the powdered thermal insulation.
  • the inner shell and the outer shell are completed, and then, the powdered thermal insulation is filled in between the inner shell in an empty state and the outer shell. Therefore, when the low temperature liquid is supplied to the inner shell, and this causes thermal contraction of the inner shell, the gap between the inner shell and the outer shell may increase, and the powdered thermal insulation filled in between the inner shell and the outer shell may move downward. When the powdered thermal insulation moves downward, a space in which the powdered thermal insulation does not exist is generated at a tank top portion of the double-shell tank, and the thickness of the heat insulating layer at the tank top portion decreases.
  • the heat insulating property of this portion deteriorates.
  • cold heat of the inner shell may be transferred to the outer shell, and this may generate frost on the outer shell.
  • frost on the outer shell.
  • the corrosion of the outer shell may be caused.
  • the amount of heat input to the inner shell increases by the deterioration of the heat insulating property, the amount of boil off gas of the low temperature liquid may increase, and the pressure of the inner shell may become excessive.
  • the double-shell tank of PTL 1 includes the heat insulating layer including two layers, i.e., inner and outer layers that are an inside heat insulating layer made of a stretchable material (glass wool) that is stretchable in a radial direction of the inner shell and an outside heat insulating layer made of filler (pearlite).
  • a space generated in the heat insulating layer by the thermal contraction of the inner shell is filled with the expanded stretchable material, and this suppresses the downward movement of the filler.
  • the heat insulating layer between the inner shell and the outer shell is made of the powdered thermal insulation, the heat insulating property of the tank top portion deteriorates by the downward movement of the powdered thermal insulation as described above.
  • the downward movement of the powdered thermal insulation can be suppressed.
  • the cost is high.
  • the present disclosure was made under these circumstances, and an object of the present disclosure is to provide a double-shell tank which realizes both forming a heat insulating layer between an inner shell and an outer shell by powdered thermal insulation and maintaining the heat insulating layer having an appropriate thickness at a tank top portion even after the powdered thermal insulation moves downward by contraction deformation of the inner shell.
  • a double-shell tank includes: an inner shell having a spherical shell shape and including therein a storing portion that stores a liquid in a sealed state; an outer shell that covers the inner shell; and powdered thermal insulation that is filled in a space surrounded by an outer wall of the inner shell and an inner wall of the outer shell to become a heat insulating layer.
  • a size of a top portion gap between the inner shell and the outer shell when the inner shell is in an empty state is equal to or more than a value obtained by adding a level difference to a size of a bottom portion gap between the inner shell and the outer shell, the level difference being a level difference between the powdered thermal insulation when the inner shell is in the empty state and the powdered thermal insulation when the liquid is in the inner shell.
  • the size of the top portion gap is larger than the size of the bottom portion gap. Therefore, when the inner shell is in the empty state, the heat insulating layer that is thicker than the heat insulating layer at the tank bottom portion is located at the tank top portion. Then, when the low temperature liquid is supplied to the inner shell, and this contracts the inner shell, the gap between the inner shell and the outer shell increases, and the powdered thermal insulation filled in between the inner shell and the outer shell moves downward. However, even after the powdered thermal insulation moves downward, the heat insulating layer having an adequate thickness is maintained at the tank top portion.
  • the above double-shell tank can realize both forming the heat insulating layer between the inner shell and the outer shell by the powdered thermal insulation and maintaining the heat insulating layer having an appropriate thickness at the tank top portion even after the powdered thermal insulation moves downward by the contraction deformation of the inner shell.
  • the outer shell may have a spherical shell shape, and a center of the outer shell may be located higher than a center of the inner shell.
  • the size of the top portion gap between the inner shell and the outer shell can be made larger than the size of the bottom portion gap between the inner shell and the outer shell in a state where each of the outer shell and the inner shell has a spherical shell shape that excels in strength.
  • the outer shell may include a lower hemispherical shell portion, an upper hemispherical shell portion, and a tubular body portion connecting the lower hemispherical shell portion and the upper hemispherical shell portion, and a center of the inner shell and a center of the lower hemispherical shell portion may coincide with each other.
  • the heat insulating layer having a fixed thickness is located around the inner shell.
  • the heat insulating layer thicker than the heat insulating layer located at the lower side of the equator of the inner shell is located around the inner shell.
  • the outer shell has a shape similar to the spherical shell shape and can obtain adequate strength.
  • the outer shell may include a main body portion having a spherical shell shape and a dome portion that is located at a top portion of the main body portion and is filled with the powdered thermal insulation, and a center of the inner shell and a center of the main body portion may coincide with each other.
  • the dome portion filled with the powdered thermal insulation is located at the top portion of the main body portion of the outer shell. Therefore, even when the powdered thermal insulation filled in between the inner shell and the main body portion of the outer shell moves downward by the contraction deformation of the inner shell, the downward movement of the powdered thermal insulation 4 is compensated by the powdered thermal insulation filled in the dome portion. Therefore, even when the powdered thermal insulation moves downward, the heat insulating layer having an adequate thickness is maintained at the tank top portion.
  • the present disclosure can provide the double-shell tank which realizes both forming the heat insulating layer between the inner shell and the outer shell by the powdered thermal insulation and maintaining the heat insulating layer having an appropriate thickness at the tank top portion even after the powdered thermal insulation moves downward by the contraction deformation of the inner shell.
  • FIG. 1 is a sectional view showing the entire configuration of an empty double-shell tank 1A according to Embodiment 1 of the present disclosure.
  • FIG. 2 is a sectional view showing the double-shell tank 1A in which a low temperature liquid 7 is in an inner shell 2 shown in FIG. 1 .
  • the double-shell tank 1A shown in FIGS. 1 and 2 is a tank that stores the low temperature liquid 7, such as liquid hydrogen, liquid nitrogen, or liquefied natural gas.
  • the double-shell tank 1A is supported by a skirt or a post (not shown) and is located on a hull, the ground, or the like.
  • the double-shell tank 1A includes: the inner shell 2; an outer shell 3 that covers the inner shell 2; powdered thermal insulation 4 that is filled in between the inner shell 2 and the outer shell 3 to become a heat insulating layer; and a vacuum pump 6 that performs vacuum drawing with respect to a space between the inner shell 2 and the outer shell 3.
  • the inner shell 2 has a hollow spherical shell shape and includes, for example, a large number of SUS panels welded to each other.
  • a storing portion 21 that stores the low temperature liquid 7 in a sealed state is inside the inner shell 2.
  • the inner shell 2 allows contraction deformation and deformation recovery which are caused by a temperature difference between normal temperature at the time of tank construction and low temperature at the time when the low temperature liquid 7 is in the inner shell 2.
  • the outer shell 3 has a hollow spherical shell shape larger than the inner shell 2 by one size and includes, for example, a large number of steel plates welded to each other.
  • the diameter of the outer shell 3 is larger than the diameter of the inner shell 2.
  • the inner shell 2 is supported by the outer shell 3 through, for example, a rod (not shown) that connects an outer wall of the inner shell 2 and an inner wall of the outer shell 3.
  • the powdered thermal insulation 4 is filled in a pressure sealed state in the space surrounded by the outer wall of the inner shell 2 and the inner wall of the outer shell 3.
  • the powdered thermal insulation 4 is, for example, granular pearlite.
  • the powdered thermal insulation 4 may be a known powdered thermal insulation other than pearlite.
  • the space which is between the inner shell 2 and the outer shell 3 and is filled with the powdered thermal insulation 4 is subjected to forced air exhaustion by the vacuum pump 6, and therefore, is substantially in a vacuum state. Since the space filled with the powdered thermal insulation 4 is substantially in a vacuum state, the heat insulating effect can be further improved.
  • a vertical line passing through a center 3c of the outer shell 3 and a vertical line passing through a center 2c of the inner shell 2 coincide with a tank center line C of the double-shell tank 1A.
  • a gap between the inner wall of the outer shell 3 and the outer wall of the inner shell 2 on the tank center line C at the tank bottom portion is referred to as a "bottom portion gap G1".
  • a gap between the inner wall of the outer shell 3 and the outer wall of the inner shell 2 on the tank center line C at the tank top portion is referred to as a "top portion gap G2".
  • the inner shell 2 and the outer shell 3 are located such that the top portion gap G2 is larger than the bottom portion gap G1.
  • the inner shell 2 and the outer shell 3 are located such that the center 3c of the outer shell 3 is located higher than the center 2c of the inner shell 2.
  • the center 3c of the outer shell 3 is a center of the spherical shell shape of the outer shell 3, and the center 2c of the inner shell 2 is a center of the spherical shell shape of the inner shell 2.
  • a size L2 of the top portion gap G2 when the inner shell 2 is in an empty state is equal to or more than a value obtained by adding a level difference ⁇ L to a size L1 of the bottom portion gap G1, the level difference ⁇ L being a level difference between the powdered thermal insulation 4 when the inner shell 2 is in the empty state ( FIG. 1 ) and the powdered thermal insulation 4 when the low temperature liquid 7 is in the inner shell 2 ( FIG. 2 ).
  • Formula 1 is satisfied.
  • the above expression "when the low temperature liquid 7 is in the inner shell 2" may be a state where the low temperature liquid 7 is in the storing portion 21 to a predetermined full liquid level (or, any reference liquid level).
  • the level difference ⁇ L (i.e., the amount of downward movement of the powdered thermal insulation 4) can be obtained by calculation or simulation.
  • the double-shell tank 1A includes: the inner shell 2 having a spherical shell shape and including therein the storing portion 21 that stores the low temperature liquid 7 in a sealed state; the outer shell 3 that covers the inner shell 2; and the powdered thermal insulation 4 that is filled in the space surrounded by the outer wall of the inner shell 2 and the inner wall of the outer shell 3 to become the heat insulating layer.
  • the size L2 of the top portion gap G2 between the inner shell 2 and the outer shell 3 is equal to or more than a value obtained by adding the level difference ⁇ L to the size L1 of the bottom portion gap G1 between the inner shell 2 and the outer shell 3, the level difference ⁇ L being a level difference between the powdered thermal insulation 4 when the inner shell 2 is in the empty state and the powdered thermal insulation 4 when the low temperature liquid 7 is in the inner shell 2.
  • the size L2 of the top portion gap G2 is larger than the size L1 of the bottom portion gap G1. Therefore, when the inner shell 2 is in the empty state, the heat insulating layer that is thicker than the heat insulating layer at the tank bottom portion is located at the tank top portion (see FIG. 1 ). Then, when the low temperature liquid 7 is supplied to the inner shell 2, and this contracts the inner shell 2, the gap between the inner shell 2 and the outer shell 3 increases, and the powdered thermal insulation 4 filled in between the inner shell 2 and the outer shell 3 moves downward. However, even after the powdered thermal insulation 4 moves downward, the heat insulating layer having an adequate thickness L2' is maintained at the tank top portion (see FIG. 2 ).
  • the double-shell tank 1A can realize both forming the heat insulating layer between the inner shell 2 and the outer shell 3 by the powdered thermal insulation 4 and maintaining the heat insulating layer having the appropriate thickness L2' at the tank top portion even after the powdered thermal insulation 4 moves downward by the contraction deformation of the inner shell 2.
  • the outer shell 3 has a spherical shell shape, and the center 3c of the outer shell 3 is located higher than the center 2c of the inner shell 2.
  • the size L2 of the top portion gap G2 between the inner shell 2 and the outer shell 3 can be made larger than the size L1 of the bottom portion gap G1 between the inner shell 2 and the outer shell 3 in a state where each of the outer shell 3 and the inner shell 2 has a spherical shell shape that excels in strength.
  • FIG. 3 is a sectional view showing the entire configuration of an empty double-shell tank 1B according to Embodiment 2 of the present disclosure.
  • FIG. 4 is a sectional view showing the double-shell tank 1B in which the low temperature liquid 7 is in the inner shell 2 shown in FIG. 3 .
  • the same reference signs are used for the same or similar components as or to those in Embodiment 1, and the repetition of the same explanation is avoided.
  • the double-shell tank 1B includes: the inner shell 2 having a spherical shell shape and including therein the storing portion 21 that stores the low temperature liquid 7 in a sealed state; the outer shell 3 that covers the inner shell 2; and the powdered thermal insulation 4 that is filled in the space surrounded by the outer wall of the inner shell 2 and the inner wall of the outer shell 3 to become the heat insulating layer.
  • the outer shell 3 includes: a lower hemispherical shell portion 31; an upper hemispherical shell portion 32; and a tubular body portion 33 that connects the lower hemispherical shell portion 31 and the upper hemispherical shell portion 32 in an upper-lower direction.
  • the diameter of the lower hemispherical shell portion 31, the diameter of the upper hemispherical shell portion 32, and the diameter of the body portion 33 are equal to each other, and this diameter is larger than the diameter of the inner shell 2.
  • the inner shell 2 and the outer shell 3 are located such that the center 2c of the inner shell 2 and a center 31c of the lower hemispherical shell portion 31 coincide with each other.
  • the inner shell 2 is supported by the outer shell 3 through, for example, a rod (not shown) that connects the outer wall of the inner shell 2 and the inner wall of the outer shell 3.
  • the outer shell 3 includes the lower hemispherical shell portion 31, the upper hemispherical shell portion 32, and the tubular body portion 33 connecting the lower hemispherical shell portion 31 and the upper hemispherical shell portion 32, and the center 2c of the inner shell 2 and the center 31c of the lower hemispherical shell portion 31 coincide with each other.
  • the heat insulating layer having a fixed thickness is located around the inner shell 2.
  • the heat insulating layer thicker than the heat insulating layer located at the lower side of the equator of the inner shell 2 is located around the inner shell 2.
  • the double-shell tank 1B is realized by a simple structure such that the size L2 of the top portion gap G2 between the inner shell 2 and the outer shell 3 is equal to or more than a value obtained by adding the level difference ⁇ L to the size L1 of the bottom portion gap G1 between the inner shell 2 and the outer shell 3, the level difference ⁇ L being a level difference between the powdered thermal insulation 4 when the inner shell 2 is in the empty state and the powdered thermal insulation 4 when the low temperature liquid 7 is in the inner shell 2.
  • the inner shell 2 has a spherical shell shape
  • the outer shell 3 does not have a spherical shell shape but has a shape similar to the spherical shell shape. The outer shell 3 can obtain adequate strength.
  • FIG. 5 is a sectional view showing the entire configuration of an empty double-shell tank 1C according to Embodiment 3 of the present disclosure.
  • FIG. 6 is a sectional view showing the double-shell tank 1C in which the low temperature liquid 7 is in the inner shell 2 shown in FIG. 5 .
  • the same reference signs are used for the same or similar components as or to those in Embodiment 1, and the repetition of the same explanation is avoided.
  • the double-shell tank 1C includes: the inner shell 2 having a spherical shell shape and including therein the storing portion 21 that stores the low temperature liquid 7 in a sealed state; the outer shell 3 that covers the inner shell 2; and the powdered thermal insulation 4 that is filled in the space surrounded by the outer wall of the inner shell 2 and the inner wall of the outer shell 3 to become the heat insulating layer.
  • the outer shell 3 includes: a main body portion 35 having a spherical shell shape; and a dome portion 36 located at a top portion of the main body portion 35.
  • the shape of the dome portion 36 is not especially limited, and for example, may have a shape obtained by vertically inverting a pot.
  • ⁇ V the volume of a void generated at the top portion of the main body portion 35 by the downward movement of the powdered thermal insulation 4 of the main body portion 35 due to the contraction deformation of the inner shell 2
  • the capacity of the dome portion 36 is larger than ⁇ V.
  • the powdered thermal insulation 4 having the volume larger than ⁇ V is filled in the dome portion 36.
  • the inner shell 2 and the outer shell 3 are located such that the center 2c of the inner shell 2 and a center 35c of the main body portion 35 coincide with each other.
  • the inner shell 2 is supported by the outer shell 3 through, for example, a rod (not shown) that connects the outer wall of the inner shell 2 and the inner wall of the outer shell 3.
  • the outer shell 3 includes: the main body portion 35 having a spherical shell shape; and the dome portion 36 located at the top portion of the main body portion 35, and the center 2c of the inner shell 2 and the center 35c of the main body portion 35 coincide with each other.
  • the dome portion 36 in which the powdered thermal insulation 4 is filled is located at the top portion of the main body portion of the outer shell 3.
  • the double-shell tank 1B is realized by a simple structure such that the size L2 of the top portion gap G2 between the inner shell 2 and the outer shell 3 is equal to or more than a value obtained by adding the level difference ⁇ L to the size L1 of the bottom portion gap G1 between the inner shell 2 and the outer shell 3, the level difference ⁇ L being a level difference between the powdered thermal insulation 4 when the inner shell 2 is in the empty state and the powdered thermal insulation 4 when the low temperature liquid 7 is in the inner shell 2.
  • the double-shell tank 1C even when the powdered thermal insulation 4 filled in between the inner shell 2 and the main body portion 35 of the outer shell 3 moves downward by the contraction deformation of the inner shell 2, the downward movement of the powdered thermal insulation 4 is compensated by the powdered thermal insulation 4 filled in the dome portion 36. Therefore, even when the powdered thermal insulation 4 moves downward, the heat insulating layer having an adequate thickness L2' is maintained at the tank top portion.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP20941713.8A 2020-06-26 2020-06-26 Réservoir à double coque Withdrawn EP4174360A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/025366 WO2021260946A1 (fr) 2020-06-26 2020-06-26 Réservoir à double coque

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EP4174360A1 true EP4174360A1 (fr) 2023-05-03
EP4174360A4 EP4174360A4 (fr) 2024-03-20

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KR (1) KR20230024370A (fr)
CN (1) CN115720615A (fr)
WO (1) WO2021260946A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115585389B (zh) * 2022-10-21 2026-04-17 四川港通医疗设备集团股份有限公司 低温容器绝热结构及其计算方法
CN219160118U (zh) * 2022-11-02 2023-06-09 乔治洛德方法研究和开发液化空气有限公司 液体储罐

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2386958A (en) * 1942-01-08 1945-10-16 Pittsburgh Des Moines Company Spherical type insulated container for liquefied gases
JPS50111018U (fr) * 1974-02-21 1975-09-10
JPH0625194U (ja) * 1992-07-17 1994-04-05 株式会社アイ・エイチ・アイ プランテック 二重殻球形タンクの支持構造
JPH07243590A (ja) * 1994-03-03 1995-09-19 Teisan Kk 断熱二重容器
JPH116600A (ja) * 1997-06-19 1999-01-12 Ishikawajima Harima Heavy Ind Co Ltd 低温タンク
US20030029877A1 (en) * 2001-07-30 2003-02-13 Mathur Virendra K. Insulated vessel for storing cold fluids and insulation method
JP2013238285A (ja) 2012-05-16 2013-11-28 Sasebo Heavy Industries Co Ltd 液体貯蔵タンク
JP6364694B2 (ja) * 2014-07-10 2018-08-01 三菱造船株式会社 運搬船
KR20180029170A (ko) * 2016-09-09 2018-03-20 삼성중공업 주식회사 액화가스 화물창
RU180823U1 (ru) * 2017-10-24 2018-06-25 Общество с ограниченной ответственностью "Научно-технический комплекс "Криогенная техника" Резервуар с компенсацией усадки вакуумно-перлитной теплоизоляции

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EP4174360A4 (fr) 2024-03-20
CN115720615A (zh) 2023-02-28
KR20230024370A (ko) 2023-02-20

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