Double-shell tank and ship

Patent metadata

Field	Value
Publication number	US-11247752-B2
Application number	US-201816756794-A
Country	US
Kind code	B2
Filing date	Oct 9, 2018
Priority date	Oct 16, 2017
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

A double-shell tank includes: an inner shell storing liquefied gas; an outer shell surrounding the inner shell, the outer shell forming a vacuum space between the inner shell and the outer shell; at least one metal sheet mounted to the inner shell, such that the metal sheet faces at least a bottom surface of the inner shell; an adsorbent placed on the metal sheet, the adsorbent adsorbing gas molecules by physisorption; and a thermal insulator covering the inner shell over the metal sheet.

First claim

The invention claimed is:

1. A double-shell tank comprising:
an inner shell storing liquefied gas;
an outer shell surrounding the inner shell, the outer shell forming a vacuum space between the inner shell and the outer shell;
at least one metal sheet mounted to the inner shell, such that at least part of the metal sheet faces a bottom surface of the inner shell;
an adsorbent placed on the metal sheet, the adsorbent adsorbing gas molecules by physisorption; and
a thermal insulator covering the inner shell and the metal sheet; wherein
the adsorbent is a porous granular or powdery material enclosed in a bag, and
a plurality of openings are formed in the metal sheet.

2. A ship comprising the double-shell tank according to claim 1 .

3. A double-shell tank comprising:
an inner shell storing liquefied gas;
an outer shell surrounding the inner shell, the outer shell forming a vacuum space between the inner shell and the outer shell;
at least one metal sheet mounted to the inner shell, such that at least part of the metal sheet faces a bottom surface of the inner shell;
an adsorbent placed on the metal sheet, the adsorbent adsorbing gas molecules by physisorption; and
a thermal insulator covering the inner shell and the metal sheet; wherein
the at least one metal sheet includes a plurality of metal sheets, and
end portions of the metal sheets that are adjacent to each other overlap each other, and stud bolts provided on the inner shell penetrate the overlapping portions.

4. A ship comprising the double-shell tank according to claim 3 .

5. A double-shell tank comprising:
an inner shell storing liquefied gas;
an outer shell surrounding the inner shell, the outer shell forming a vacuum space between the inner shell and the outer shell;
at least one metal sheet mounted to the inner shell, such that at least part of the metal sheet faces a bottom surface of the inner shell;
an adsorbent placed on the metal sheet, the adsorbent adsorbing gas molecules by physisorption; and
a thermal insulator covering the inner shell and the metal sheet; wherein
a plurality of stud bolts are provided on the inner shell,
the thermal insulator includes a plurality of thermal insulation sheets, and
the plurality of stud bolts are used for fixing the metal sheet and the plurality of thermal insulation sheets.

6. A ship comprising the double-shell tank according to claim 5 .

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Nakado Hiroki
• Shingo Masashi
• Gokan Kazuto
• Uraguchi Ryosuke

Classifications

• F17C2221/017

  Helium · CPC title

• F17C2270/0105

  Ships · CPC title

• B65D90/06

  Coverings, e.g. for insulating purposes · CPC title

• F17C3/08

  by vacuum spaces, e.g. Dewar flask (for household use A47J41/02) · CPC title

• B63B25/16 Primary

  heat-insulated (insulating panelling B63B3/68; heating or cooling B63J) · CPC title