KR-20260064905-A - Vacuum insulated cryogenic tank

Abstract

The present invention relates to a cryogenic vacuum insulated tank for the storage or transport of cryogenic fluids. In addition, the present invention comprises a tank body that includes an inner tank forming a receiving space for a cryogenic fluid and an outer tank spaced apart from the inner tank to form an insulating space between them, and in which an insulating material is filled in the insulating space, and a dome body that is integrally formed with the tank body and extends to a predetermined height in the shape of a tank dome from the top of the tank body to expand the insulating space and is equipped with an insulating material injection port for injecting the insulating material. This allows for uniform injection of the insulating material and, in the event of the insulating material settling, fills the insulating space with excess insulating material, thereby effectively preventing uneven distribution of the insulating material and degradation of insulating performance caused by settling.

Inventors

• 유병문
• 허행성
• 박광준
• 황범석

Assignees

• 한화오션 주식회사

Dates

Publication Date

20260508

Application Date

20241030

Claims (3)

1. A tank body comprising an inner tank forming a receiving space for receiving a cryogenic fluid, and an outer tank spaced apart from the outer side of the inner tank to form an insulating space between the inner tank and the outer tank, wherein the insulating space is filled with insulating material; and A dome body formed integrally with the tank body, extending upward by a predetermined height above the tank body to expand the insulation space, and having an insulation material injection port for injecting insulation material; A cryogenic vacuum insulation tank characterized in that the dome body has an internal space that expands the insulation space and stores excess insulation material filled in the internal space.
2. In Article 1, The above dome body is, A cryogenic vacuum insulation tank characterized by having a truncated cone-shaped lower body connected to the outer shell of the tank body, wherein the angle of inclination of the side surface of the lower body is formed to be equal to or relatively larger than the angle of the fill line according to the angle of repose of the insulation material.
3. In Article 1, The above dome body is, A cryogenic vacuum insulation tank characterized by determining the installation location of the insulation material injection port based on the fill line, wherein the port is positioned at a relatively higher position than the fill line.

Description

Vacuum insulated cryogenic tank The present invention relates to a cryogenic vacuum insulated tank for the storage or transport of cryogenic fluids. Generally, in a vacuum insulated tank for the storage or transport of cryogenic fluids, an outer tank for insulation is formed on the outside of an inner tank containing the cryogenic fluid, and an insulating space filled with insulating material is provided between the inner tank and the outer tank. However, referring to Figure 1 (a) which shows a conventional vacuum insulation tank, the vacuum insulation tank (10) has an injection port (13) formed in the insulation space between the inner tank (11) and the outer tank (12) for injecting insulation material. Since the injection port (13) is formed in the outer tank (12) and the height difference with the inner tank (11) is not large, a blind spot (1) may be formed in which the insulation material is unevenly distributed at a certain location in the insulation space depending on the angle of repose of the insulation material when the insulation material is injected, and there is a problem that the insulation performance may be reduced due to this blind spot (1). In addition, referring to Figure 1 (b), which shows a conventional vacuum insulation tank, after a certain amount of time has passed since the insulation material (2) was filled into the insulation space, a weak space (3) may occur in the upper part of the insulation space where the insulation material (2) is insufficient or empty due to subsidence, and there is a problem that the insulation performance is reduced as a result. Meanwhile, the technology forming the background of the present invention is disclosed in Korean Patent Publication No. 10-2023-0143585. FIG. 1 is a drawing showing a conventional vacuum insulation tank. FIG. 2 is a drawing of a cryogenic vacuum insulation tank according to the present invention. FIGS. 3 and 4 are drawings for illustrating the dome body of a cryogenic vacuum insulation tank according to the present invention. In the following description, specific details of the invention are provided to provide an overall understanding of the invention, but it will be obvious to those skilled in the art that the invention can be easily practiced without these specific details and by variations thereof. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached FIGS. 2 to 4, focusing on the parts necessary to understand the operation and function according to the present invention. FIG. 2 is a drawing of a cryogenic vacuum insulation tank according to the present invention, and FIG. 3 and FIG. 4 are drawings for explaining the dome body of a cryogenic vacuum insulation tank according to the present invention. Referring to FIGS. 2 to 4, a cryogenic vacuum insulation tank (100) according to one embodiment of the present invention may be configured to include a tank body (110) and a dome body (120). The cryogenic vacuum insulation tank (100) according to one embodiment of the present invention can be mounted on a vessel such as a hydrogen carrier and used for long-distance transport over the sea, and can also be applied to various floating offshore structures that can float on the sea and store cryogenic fluid for a certain period of time even without self-propulsion capabilities. In addition, the cryogenic vacuum insulation tank (100) according to one embodiment of the present invention is not limited to being applied only to a spherical storage tank, but can also be extended to vacuum insulation tanks of various shapes that are filled with insulation material. The tank body (110) may be configured to include an inner tank (111) in which a receiving space is formed to accommodate a cryogenic fluid, an outer tank (112) that surrounds the inner tank (111) and whose inner surface is spaced apart from the outer side of the inner tank (111) by a predetermined distance, and an insulating space (113) formed between the inner tank (111) and the outer tank (112) and filled with insulating material. Here, the aforementioned inner tank (111) and outer tank (112) may be spherical in shape, but are not limited thereto. Additionally, the insulating material filled in the insulating space (113) of the tank body (110) may be a powdered insulating material such as perlite, hollow glass microspheres, or aerogel, but is not limited thereto. The above dome body (120) is formed integrally with the tank body (110), can be extended to a predetermined height above the tank body (110), and is formed to be connected to the insulation space (113) of the tank body (110) so as to expand the insulation space (113). In this way, the dome body (120) can avoid the occurrence of thermal stress caused by the temperature difference at the top of the pump tower as much as possible by separating the distance between the inner tank (111) and the pump tower. Meanwhile, the dome body (120) can be divided