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KR-102962911-B1 - storage tank

KR102962911B1KR 102962911 B1KR102962911 B1KR 102962911B1KR-102962911-B1

Abstract

The present invention relates to a storage tank (5) for liquid hydrogen (H2), wherein the storage tank comprises a wall (19), a base (18) that closes the wall (19) at one side end, a top (17) that closes the wall (19) at a side end facing away from the base (18), and intermediate walls (23, 26) arranged at a distance from the inner side of the wall (19), and a gap (25) is provided between the lower edge (24) of the intermediate walls (23, 26) and the base (18) so that the interior (12) surrounded by the intermediate walls (23, 26) is fluidly connected to the interior (11) surrounded by the wall (19).

Inventors

  • 아이그너, 허버트
  • 쇤베르거, 만프레드

Assignees

  • 린데 게엠베하

Dates

Publication Date
20260512
Application Date
20210322
Priority Date
20200406

Claims (11)

  1. A storage tank (5) for liquid hydrogen (H2) comprises a wall (19), a base (18) closing the wall (19) at one end face, a top (17) closing the wall (19) at the end face away from the base (18), and intermediate walls (23, 26) arranged inside the wall (19) and spaced apart from it, wherein a gap (25) is provided between the lower edge (24) of the intermediate walls (23, 26) and the base (18), so that an internal space (I2) enclosed by the intermediate walls (23, 26) is fluidly connected to an internal space (I1) enclosed by the wall (19). The above wall (19) is cylindrical and rotationally symmetric with respect to a symmetry axis (6) that proceeds along the direction of gravity (g), and The above storage tank (5) includes an inner tank (9) for holding the liquid hydrogen and an outer tank (8) in which the inner tank (9) is accommodated, and the intermediate walls (23, 26) are arranged within the inner tank (9). An insulating element (10) is provided between the inner tank (9) and the outer tank (8), and The above intermediate walls (23, 26) are configured to reduce sloshing of the liquid hydrogen within the inner tank (9), and A storage tank (5) in which a gap (29) extending around the axis of symmetry (6) is provided between the above wall (19) and the above intermediate wall (23).
  2. delete
  3. In claim 1, the intermediate walls (23, 26) are rotationally symmetric with respect to the axis of symmetry (6), forming a storage tank.
  4. delete
  5. A storage tank according to claim 1 or 3, comprising a plurality of intermediate walls (23, 26) that are rotationally symmetric with respect to the symmetry axis (6), wherein the intermediate walls (23, 26) are arranged coaxially with respect to each other.
  6. A storage tank according to claim 5, wherein a gap (30) extending around the symmetry axis (6) is provided between a first intermediate wall (23) and a second intermediate wall (26) arranged within the first intermediate wall (23).
  7. A storage tank according to claim 1 or 3, wherein the intermediate wall (23, 26) is supported by the wall (19) by a support member (27, 28).
  8. In claim 1 or 3, the intermediate wall (23, 26) is connected to the top (17), forming a storage tank.
  9. A storage tank according to claim 1 or 3, further comprising an inner tank (9) for holding hydrogen (H2) and an outer tank (8) in which the inner tank (9) is received, wherein the intermediate walls (23, 26) start from the top (17) and extend along the axis of symmetry (6) in the direction of the base (18) into the inner tank (9).
  10. In claim 9, the intermediate wall (23, 26) extends into the inner tank (9) along at least half of the length (l) of the inner tank (9), a storage tank.
  11. A storage tank according to claim 1 or 3, wherein the base (18) and the top (17) are dome-shaped outwardly and oppositely to the wall (19).

Description

storage tank The present invention relates to a storage tank for liquid hydrogen. According to the applicant's internal findings, a storage tank for liquid hydrogen has a cylindrical geometric shape having a tubular base section with two dome-shaped end cap sections that close the base section at the end faces. In marine applications of such a storage tank, movement of liquid hydrogen caused by swell must be anticipated in the storage tank. When the storage tank is positioned horizontally or vertically, the mass inertia of the liquid hydrogen and the existing curvature of the storage tank can result in sloshing of liquid hydrogen over a large area in both its base section and end cap sections. This sloshing, also known as swashing, can lead to cooling of the gaseous phase of the hydrogen present in the storage tank and thus to a pressure reduction in the gas cushion generated by the gaseous phase. This depends on the current swell and can have an undesirable effect on the hydrogen supply pressure available to operate, for example, the components of a fuel cell. This can lead to unstable operation of the operating components. This must be prevented. Against this background, the objective of the present invention is to provide an improved storage tank. Accordingly, a storage tank for liquid hydrogen is proposed. The storage tank comprises a wall, a base closing the wall at one end face, a top closing the wall at one end facing away from the base, and an intermediate wall arranged with a gap between the inner side of the wall and the base, so that an internal space enclosed by the intermediate wall is fluidly connected to the internal space enclosed by the wall. Due to the fact that storage tanks can be arranged vertically and have additional intermediate walls, a significant reduction in the sloshing effect can be achieved compared to horizontal storage tanks, as well as to vertically arranged storage tanks that do not have such intermediate walls, because the movement of liquid hydrogen acts equally in all spatial directions and there is no need to consider longitudinal and transverse movement. Storage tanks are particularly suitable for marine applications. Therefore, storage tanks may be referred to as marine storage tanks. For example, storage tanks can be mounted on vehicles, particularly ships. Accordingly, vehicles, particularly ships, equipped with such storage tanks are also proposed. Storage tanks may also be referred to as hydrogen storage tanks. Storage tanks are preferably suitable for holding liquid hydrogen. However, storage tanks can also be used for other cryogenic liquids. Briefly, examples of cryogenic fluids or liquids, or cryogenic fluids, are, for example, liquid helium, liquid nitrogen, or liquid oxygen. In a storage tank, after or during the filling of hydrogen, there is a gas zone having gaseous hydrogen and a base liquid zone having liquid hydrogen. A phase boundary is provided between the gas zone and the liquid zone. After entering the storage tank, helium thus has two different condensation states, namely, liquid and gaseous phases. Hydrogen can transition from the liquid phase to the gaseous phase and vice versa. An intermediate wall protrudes at least partially into the liquid zone. The intermediate wall is preferably always washed at least partially with liquid hydrogen. The walls are particularly cylindrical, preferably circular-cylindrical. The intermediate walls also have a cylindrical geometric shape. The fact that the intermediate walls are "separated" from the walls means that, in this case, no direct contact is provided between the walls and the intermediate walls. Specifically, the intermediate walls are located at a radial distance from the walls. The intermediate walls are open at their end faces, particularly when viewed from the direction of the base. This implies that the term "enclosed" also includes embodiments where each internal space is open toward another internal space. The fact that the internal spaces are "fluid-connected" means that, in this case, liquid hydrogen can flow back and forth between the internal spaces. With respect to the direction of gravity, the top is located specifically on the base. That is, the storage tank is positioned upright or vertically. According to a particularly preferred embodiment of a storage tank, the storage tank comprises a symmetry axis extending along the direction of gravity, a wall rotationally symmetric with respect to the symmetry axis, a base closing the wall on one side of an end face, a top closing the wall on one end face facing away from the base, and an intermediate wall arranged inside the wall, arranged at a distance from the wall, and rotationally symmetric with respect to the symmetry axis. Therefore, the fact that the axis of symmetry extends along the direction of gravity in this case means that the axis of symmetry and the storage tank are also arranged vertically and not horizontally. That is, the top