Liquid hydrogen storage system and ship

Abstract

The invention belongs to the technical field of ships, and discloses a liquid hydrogen storage system and a ship, the liquid hydrogen storage system comprises an inner tank, an outer tank, a first supporting assembly and a second supporting assembly, the inner tank is used for containing liquid hydrogen, the inner tank is arranged in the outer tank, the outer wall of the inner tank and the inner wall of the outer tank are arranged at intervals, the first supporting assembly is connected with the outer tank, and the second supporting assembly is connected with the outer tank; the first supporting assembly is used for being supported on a basic deck of a ship, the second supporting assemblies are supported between the outer wall of the inner tank and the inner wall of the outer tank, and the multiple second supporting assemblies are evenly distributed at the same height in the circumferential direction of the outer tank. According to the liquid hydrogen storage system, the stability and reliability of the supporting effect on the inner tank can be improved, heat conduction channels between the inner tank and the outer tank are reduced, and the heat conduction amount between liquid hydrogen and the external environment can be reduced.

Description

Technical Field

[0001] This invention relates to the field of marine technology, and more particularly to a liquid hydrogen storage system and a ship. Background Technology

[0002] Hydrogen energy, as the most efficient and clean fuel energy, is widely used in various fields of production and daily life. Liquid hydrogen, with a volume density 845 times that of its gaseous state, offers advantages such as high refueling and storage efficiency and low long-distance transportation costs, making it the optimal solution for large-scale hydrogen storage and transportation. Currently, for cross-border and cross-regional liquid hydrogen trade, large-capacity liquid hydrogen transport ships are the most economical, convenient, and flexible means of storage and transportation.

[0003] Due to the various accelerations of ships in waves, liquid hydrogen is prone to fluctuations within the storage tank, which can exert impact forces on the tank. Therefore, the storage tank needs to have reliable support. Furthermore, liquid hydrogen has a boiling point of -253℃, making it very easy to vaporize, and its volumetric evaporation rate is high. Therefore, the insulation capacity of the storage tank should also be considered when transporting liquid hydrogen.

[0004] To address the aforementioned issues, existing technology discloses a method for storing liquid hydrogen using a double-layered tank. Specifically, an inner tank and an outer tank fitted over the inner tank are provided. Multiple support structures are provided between the inner and outer tanks, with these structures distributed across the entire outer wall of the inner tank. A bracket is provided on the outer side of the outer tank to support the outer tank on the hull.

[0005] In the above technical solution, the multiple support structures distributed on the entire outer wall of the inner tank increase the heat conduction channel between the inner tank and the outer tank, which is not conducive to reducing the heat conduction between the liquid hydrogen stored in the inner tank and the external environment.

[0006] Therefore, there is an urgent need to develop a liquid hydrogen storage system and vessel to solve the aforementioned technical problems. Summary of the Invention

[0007] The first objective of this invention is to provide a liquid hydrogen storage system that improves the stability and reliability of the inner tank support and reduces the heat conduction channels between the inner and outer tanks, thereby reducing the heat conduction between the liquid hydrogen and the external environment.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] Liquid hydrogen storage system, including:

[0010] The inner tank is used to hold liquid hydrogen;

[0011] An outer tank and an inner tank are located inside the outer tank, with the outer wall of the inner tank and the inner wall of the outer tank spaced apart.

[0012] The first support assembly is connected to the outer tank and is used to support the ship's base deck.

[0013] The second support assembly is supported between the outer wall of the inner tank and the inner wall of the outer tank. There are multiple second support assemblies, which are evenly distributed along the circumference of the outer tank at the same height.

[0014] Optionally, both the inner and outer tanks are spherical, with the center of the inner tank and the center of the outer tank coinciding at a reference point.

[0015] Optionally, the height of the second support component is lower than the height of the reference point.

[0016] Optionally, the first support assembly includes a support barrel with its axis extending vertically, the support barrel being used to support the base deck, and at least part of the outer tank being embedded in the support barrel.

[0017] Optionally, the first support assembly further includes a connector, which is connected between the outer wall of the outer tank and the inner wall of the support barrel. In the vertical direction, the height of the middle part of the connector is the same as the height of the reference point.

[0018] And / or, the first support assembly further includes a first reinforcing rib, which is disposed on the outer wall of the support barrel and extends circumferentially along the support barrel and is connected end to end.

[0019] And / or, the first support assembly further includes a second reinforcing rib, which is disposed vertically on the outer wall of the support barrel.

[0020] Optionally, the second support assembly includes an inner support structure, an outer support structure, and a support member. The inner support structure is connected to the outer wall of the inner tank, the outer support structure is connected to the inner wall of the outer tank, and the support member is sandwiched between the inner support structure and the outer support structure. The support member is a fiberglass element, a Teflon element, or a wooden element.

[0021] Optionally, the internal support structure includes an inner web plate and an inner support plate. One side wall of the inner web plate is connected to the outer wall of the inner tank, and the other side wall of the inner web plate is connected to the inner support plate. The external support structure includes an outer web plate and an outer support plate. One side wall of the outer web plate is connected to the inner wall of the outer tank, and the other side wall of the outer web plate is connected to the outer support plate. The support member is sandwiched between the inner support plate and the outer support plate.

[0022] Optionally, the inner support plate has an inner limiting groove on the side facing the outer support plate, and the outer support plate has an outer limiting groove on the side facing the inner support plate. One side of the support member is engaged in the inner limiting groove, and the other side of the support member is engaged in the outer limiting groove.

[0023] Optionally, a vacuum cavity is formed between the outer wall of the inner tank and the inner wall of the outer tank;

[0024] And / or, a heat insulation layer is provided between the outer wall of the inner tank and the inner wall of the outer tank.

[0025] The second objective of this invention is to provide a ship whose liquid hydrogen storage system can improve the stability and reliability of the support for the inner tank, and also reduce the heat conduction channels between the inner and outer tanks, which is beneficial to reducing the heat conduction between liquid hydrogen and the external environment.

[0026] To achieve this objective, the present invention adopts the following technical solution:

[0027] The vessel includes a hull, a base deck, and the aforementioned liquid hydrogen storage system. The base deck is located on the hull, and the first support assembly is supported on the base deck.

[0028] The beneficial effects of this invention are:

[0029] The first support assembly is connected to the outer tank and supports it on the ship's foundation deck. The second support assembly supports the inner tank between its outer and inner walls. Multiple second support assemblies are evenly distributed along the circumference of the outer tank at the same height. The combined action of the first and second support assemblies provides stable support for the inner tank. Furthermore, the fact that multiple second support assemblies are evenly distributed along the circumference of the outer tank at the same height not only improves the stability and reliability of the support for the inner tank but also eliminates the need for additional second support assemblies between the outer and inner tanks. This reduces the heat conduction channels between the inner and outer tanks, which helps to minimize the heat transfer between liquid hydrogen and the external environment. Attached Figure Description

[0030] Figure 1 This is a schematic cross-sectional view of the liquid hydrogen storage system provided by the present invention;

[0031] Figure 2 yes Figure 1 Sectional view along the AA direction;

[0032] Figure 3 This is a schematic diagram of the structure of the second support component provided by the present invention;

[0033] Figure 4 This is a schematic diagram of the internal support structure provided by the present invention;

[0034] Figure 5 This is a schematic diagram of the external support structure provided by the present invention;

[0035] Figure 6 yes Figure 5 A schematic diagram of the structure from the B-direction view;

[0036] Figure 7 This is a schematic diagram of the structure of the first support component provided by the present invention.

[0037] In the picture:

[0038] 10. Base deck; 20. Upper deck; 30. Ballast tank;

[0039] 100. Inner tank; 110. Inner reinforcing rib; 120. Third reinforcing rib; 200. Outer tank; 210. Outer reinforcing rib; 220. Fourth reinforcing rib; 300. First support assembly; 310. Support barrel; 320. Connector; 330. First reinforcing rib; 340. Second reinforcing rib; 400. Second support assembly; 410. Inner support structure; 411. Inner web plate; 412. Inner support plate; 413. Inner limiting plate; 414. Inner elbow plate; 420. Outer support structure; 421. Outer web plate; 422. Outer support plate; 423. Outer limiting groove; 424. Outer limiting plate; 425. Outer elbow plate; 430. Support component; 500. Reference point; 600. Heat insulation layer; 700. Protective shell. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0041] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0044] This embodiment provides a liquid hydrogen storage system that can improve the stability and reliability of the inner tank support and reduce the heat conduction channels between the inner and outer tanks, which is beneficial to reducing the heat conduction between liquid hydrogen and the external environment.

[0045] Specifically, such as Figure 1 and Figure 2 As shown, the liquid hydrogen storage system includes an inner tank 100, an outer tank 200, a first support assembly 300, and a second support assembly 400. The inner tank 100 is used to contain liquid hydrogen (not shown in the figure) and is disposed inside the outer tank 200. The outer wall of the inner tank 100 and the inner wall of the outer tank 200 are spaced apart. The first support assembly 300 is connected to the outer tank 200 and is used to support the ship's base deck 10. The second support assembly 400 is supported between the outer wall of the inner tank 100 and the inner wall of the outer tank 200. There can be multiple second support assemblies 400. For example, the number of second support assemblies 400 can be five, ten, fifteen, or other. Multiple second support assemblies 400 are evenly distributed along the circumference of the outer tank 200 at the same height.

[0046] Based on the above design, the first support component 300 is connected to the outer tank 200 and is used to support the ship's base deck 10. The second support component 400 is supported between the outer wall of the inner tank 100 and the inner wall of the outer tank 200. Multiple second support components 400 are evenly distributed around the circumference of the outer tank 200 at the same height. The force exerted by liquid hydrogen on the inner tank 100 is transmitted to the outer tank 200 through the multiple second support components 400. The outer tank 200 then transmits this force to the ship's base deck 10 through the first support component 300. Thus, under the combined action of the first support component 300 and the second support component 400, the transfer of various loads between the inner tank 100 and the base deck 10 is realized, providing stable support for the inner tank 100. Furthermore, the multiple second support components 400 are evenly distributed around the circumference of the outer tank 200 at the same height. This structure not only improves the stability and reliability of the support for the inner tank 100, but also eliminates the need to set up second support components 400 at other positions between the outer tank 200 and the inner tank 100. This reduces the heat conduction channels between the inner tank 100 and the outer tank 200, which helps to reduce the heat conduction between liquid hydrogen and the external environment and maintain the low temperature state of liquid hydrogen.

[0047] Furthermore, both the inner tank 100 and the outer tank 200 are spherical, with the centers of the inner tank 100 and the outer tank 200 coinciding at a reference point 500. For the same volume, a spherical tank has the smallest surface area; therefore, designing both the inner tank 100 and the outer tank 200 as spherical structures helps minimize the evaporation area of ​​liquid hydrogen. Secondly, designing the inner tank 100 as a spherical structure helps to ensure a uniform distribution of the internal pressure of the liquid hydrogen. Thirdly, coinciding the centers of the inner tank 100 and the outer tank 200 at the reference point 500 improves the stability and reliability of the support provided by the first support assembly 300 and the second support assembly 400 to the inner tank 100 and the outer tank 200.

[0048] It is understood that in this embodiment, both the inner tank 100 and the outer tank 200 are spherical. Therefore, the uniform distribution of multiple second support components 400 along the circumference of the outer tank 200 at the same height means that at the same height, multiple second support components 400 are evenly distributed on the same circumference of the inner tank 100, and at the same height, multiple second support components 400 are evenly distributed on the same circumference of the outer tank 200.

[0049] Furthermore, the height of the second support assembly 400 is lower than the height of the reference point 500 to improve the reliability of the second support assembly 400 in supporting the inner tank 100.

[0050] Furthermore, the angle between the line connecting the second support component 400 and the reference point 500 and the horizontal plane is α, 25°≤α≤35°, with α=30° being preferred, which further improves the support effect of the second support component 400 on the inner tank 100.

[0051] Optionally, a vacuum cavity is formed between the outer wall of the inner tank 100 and the inner wall of the outer tank 200. In this embodiment, the air pressure between the outer wall of the inner tank 100 and the inner wall of the outer tank 200 is 1×10⁻⁶. -1 Pa to 1×10 -5 Between Pa, a heat insulation barrier is formed between the inner tank 100 and the outer tank 200, reducing the heat transfer between the inner tank 100 and the outer tank 200 and maintaining the low temperature state of liquid hydrogen.

[0052] Furthermore, a heat insulation layer 600 is provided between the outer wall of the inner tank 100 and the inner wall of the outer tank 200. Based on the vacuum cavity between the outer wall of the inner tank 100 and the inner wall of the outer tank 200, the heat insulation layer 600 is provided between the outer wall of the inner tank 100 and the inner wall of the outer tank 200, so that the heat convection, heat radiation and heat conduction between the inner tank 100 and the outer tank 200 are highly suppressed, and the liquid hydrogen is maintained at a low temperature.

[0053] Furthermore, the insulation layer 600 can be a polyurethane foam layer, a polystyrene foam layer, or a ceramic layer, etc.

[0054] It should be noted that in other embodiments, the heat insulation layer 600 may be provided only between the outer wall of the inner tank 100 and the inner wall of the outer tank 200, that is, the outer wall of the inner tank 100 and the inner wall of the outer tank 200 are in a normal pressure state; or a vacuum cavity may be provided only between the outer wall of the inner tank 100 and the inner wall of the outer tank 200, that is, the heat insulation layer 600 is omitted.

[0055] Optionally, such as Figure 3 As shown, the second support assembly 400 includes an inner support structure 410, an outer support structure 420, and a support member 430. The inner support structure 410 is connected to the outer wall of the inner tank 100, the outer support structure 420 is connected to the inner wall of the outer tank 200, and the support member 430 is sandwiched between the inner support structure 410 and the outer support structure 420. The support member 430 is a fiberglass element, a Teflon element, or a wooden element. When liquid hydrogen fluctuates in the inner tank 100 due to various acceleration movements of the ship, the liquid hydrogen exerts a force on the inner tank 100. The inner tank 100 transmits this force to the outer tank 200 through the second support assembly 400. At this time, since the support member 430 is a fiberglass element, a Teflon element, or a wooden element, it can undergo slight deformation under a large force. This can buffer the force transmitted from the inner tank 100 to the outer tank 200, reduce the force on the outer tank 200, and improve the safety of the liquid hydrogen storage system. Furthermore, in this embodiment, the multiple second support components 400 are evenly distributed around the outer tank 200 at the same height. That is, no second support components 400 are provided at other positions of the inner tank 100 and the outer tank 200. Compared with providing multiple second support components 400 on the entire outer wall of the inner tank 100 (i.e., the entire inner wall of the outer tank 200), the technical solution provided in this embodiment is beneficial to causing slight deformation of the support member 430, thereby providing a guarantee for the safety of the liquid hydrogen storage system.

[0056] Furthermore, such as Figures 3 to 5As shown, the inner support structure 410 includes an inner web plate 411 and an inner support plate 412. One side wall of the inner web plate 411 is connected to the outer wall of the inner tank 100, and the other side wall of the inner web plate 411 is connected to the inner support plate 412. The outer support structure 420 includes an outer web plate 421 and an outer support plate 422. One side wall of the outer web plate 421 is connected to the inner wall of the outer tank 200, and the other side wall of the outer web plate 421 is connected to the outer support plate 422. The support member 430 is sandwiched between the inner support plate 412 and the outer support plate 422. In the inner support structure 410, only the sidewall of the inner web 411 is connected to the outer wall of the inner tank 100. This significantly reduces the contact area between the inner support structure 410 and the inner tank 100, thereby reducing heat transfer between them. Similarly, in the outer support structure 420, only the sidewall of the outer web 421 is connected to the inner wall of the outer tank 200. This also significantly reduces the contact area between the outer support structure 420 and the outer inner tank 100, further reducing heat transfer between them. This reduction in heat transfer between the inner tank 100 and the outer tank 200 lowers the probability of liquid hydrogen absorbing heat and vaporizing. On the other hand, since both the inner tank 100 and the outer tank 200 are spherical, the side wall connecting the inner web plate 411 to the inner tank 100 is arc-shaped, and the side wall connecting the outer web plate 421 to the outer tank 200 is arc-shaped. Combined with the spherical structure of the inner tank 100 and the outer tank 200, the second support component 400 can transmit forces in multiple directions between the inner tank 100 and the outer tank 200, thereby improving the flexibility of force transmission between the inner tank 100 and the outer tank 200.

[0057] Furthermore, such as Figures 3 to 6 As shown, the inner support plate 412 has an inner limiting groove (not shown in the figure) on the side facing the outer support plate 422, and the outer support plate 422 has an outer limiting groove 423 on the side facing the inner support plate 412. One side of the support member 430 is engaged in the inner limiting groove, and the other side of the support member 430 is engaged in the outer limiting groove 423. This serves to limit the movement of the support member 430, preventing it from moving relative to the inner tank 100 and the outer tank 200 under large forces.

[0058] Furthermore, the inner support structure 410 also includes an inner limiting plate 413, which is connected to the side of the inner support plate 412 opposite to the inner web plate 411. There can be multiple inner limiting plates 413, for example, three, four, or five. These multiple inner limiting plates 413 are connected end-to-end to form an inner limiting groove. The outer support structure 420 also includes an outer limiting plate 424, which is connected to the side of the outer support plate 422 opposite to the outer web plate 421. There can be multiple outer limiting plates 424, for example, three, four, or five. These multiple outer limiting plates 424 are connected end-to-end to form an outer limiting groove 423.

[0059] Optionally, the inner support structure 410 further includes an inner elbow plate 414, which passes through the inner web 411 and is connected to the inner support plate 412, thereby improving the support effect on the inner support plate 412. In this embodiment, there are multiple inner elbow plates 414, for example, two, five, seven, or other numbers. Multiple inner elbow plates 414 are spaced apart along the extension direction of the inner web 411 to further improve the support effect on the inner support plate 412.

[0060] Optionally, the outer support structure 420 further includes an outer elbow plate 425, which passes through the outer web plate 421 and is connected to the outer support plate 422, thereby improving the support effect on the outer support plate 422. In this embodiment, there are multiple outer elbow plates 425, for example, two, five, seven, or other numbers. Multiple outer elbow plates 425 are spaced apart along the extension direction of the outer web plate 421 to further improve the support effect on the outer support plate 422.

[0061] Optionally, the inner wall of the inner tank 100 is provided with multiple sets of internal reinforcing ribs, for example, five, ten, or fifteen sets. These sets of internal reinforcing ribs are spaced apart vertically, and each set includes multiple internal reinforcing ribs 110, for example, ten, fifteen, or twenty ribs. The internal reinforcing ribs 110 within the same set are evenly distributed at the same height along the circumference of the inner tank 100. This improves the structural strength of the inner tank 100.

[0062] Optionally, the outer wall of the outer tank 200 is provided with multiple sets of external reinforcing ribs, for example, five, ten, or fifteen sets. These sets of external reinforcing ribs are spaced apart vertically, and each set includes multiple external reinforcing ribs 210, for example, ten, fifteen, or twenty ribs. The multiple external reinforcing ribs 210 within the same set are evenly distributed at the same height along the circumference of the outer tank 200. This improves the structural strength of the outer tank 200.

[0063] Optionally, the inner wall of the inner tank 100 is further provided with a third reinforcing rib 120. In the vertical direction, two adjacent inner reinforcing ribs 110 are respectively connected to the two ends of the third reinforcing rib 120, and the inner web plate 411 is positioned directly opposite the third reinforcing rib 120. The outer wall of the outer tank 200 is further provided with a fourth reinforcing rib 220. In the vertical direction, two adjacent outer reinforcing ribs 210 are respectively connected to the two ends of the fourth reinforcing rib 220, and the outer web plate 421 is positioned directly opposite the fourth reinforcing rib 220. This structural design improves the effectiveness of load transfer between the inner tank 100 and the outer tank 200, and is beneficial to improving the load transfer between the inner tank 100 and the foundation deck 10.

[0064] Optionally, such as Figure 1 and Figure 7 As shown, the first support assembly 300 includes a support barrel 310, the axis of which extends vertically. The support barrel 310 is used to support the base deck 10, and at least a portion of the outer tank 200 is embedded within the support barrel 310. In this embodiment, the lower half of the outer tank 200 is embedded within the support barrel 310, that is, 1 / 2 of the outer tank 200 is embedded within the support barrel 310. Of course, in other embodiments, all of the outer tank 200 may be embedded within the support barrel 310, or 1 / 3 or 3 / 4 of the outer tank 200 may be embedded within the support barrel 310. Embedding at least a portion of the outer tank 200 within the support barrel 310, and ensuring that the axis of the support barrel 310 extends vertically, can improve the reliability of the support barrel 310 in supporting the outer tank 200, and can also reduce the space occupied by the liquid hydrogen storage system, thereby improving the utilization rate of the storage capacity.

[0065] Furthermore, the first support assembly 300 also includes a connector 320, which connects the outer wall of the outer tank 200 and the inner wall of the support barrel 310. In the vertical direction, the height of the middle part of the connector 320 is the same as the height of the reference point 500. Thus, the support barrel 310 provides support to the outer tank 200 through the connector 320. Since the height of the middle part of the connector 320 is the same as the height of the reference point 500, that is, the height of the middle part of the connector 320 is the same as the height of the center of the spherical outer tank 200, the support effect of the connector 320 on the outer tank 200 can be improved, thereby improving the reliability of the support barrel 310's support function on the outer tank 200. In addition, this structure also minimizes the volume of the connector 320, thereby reducing the heat conduction channel between the support barrel 310 and the outer tank 200, which is beneficial for maintaining the low temperature state of liquid hydrogen. It should be noted that in order to improve the reliability of the connection between the support bucket 310 and the outer tank 200, the connector 320 needs to have sufficient structural strength. Specifically, the connector 320 can be made of a material with high structural strength, or the thickness of the connector 320 can be increased to improve its structural strength.

[0066] Optionally, the first support assembly 300 further includes a first reinforcing rib 330, which is disposed on the outer wall of the support barrel 310 and extends circumferentially along the support barrel 310 and is connected end to end. This improves the structural strength of the support barrel 310, thereby improving the reliability and stability of the support barrel 310 in supporting the outer tank 200.

[0067] Furthermore, there are multiple first reinforcing ribs 330, for example, two, three or four first reinforcing ribs 330, etc. Multiple first reinforcing ribs 330 are arranged at intervals along the axial direction of the support barrel 310 to further improve the structural strength of the support barrel 310.

[0068] Optionally, the first support assembly 300 further includes a second reinforcing rib 340, which is vertically disposed on the outer wall of the support barrel 310. This improves the structural strength of the support barrel 310, thereby enhancing the reliability and stability of the support barrel 310 in supporting the outer tank 200.

[0069] Furthermore, in the vertical direction, the top of the bottom first reinforcing rib 330 is connected to the top of the second reinforcing rib 340 to further improve the structural strength of the support barrel 310.

[0070] It is understandable that in other implementation schemes, one of the first reinforcing rib 330 and the second reinforcing rib 340 may be omitted, depending on the actual application requirements.

[0071] Optionally, the liquid hydrogen storage system also includes a protective shell 700. The outer tank 200 extends from the side opposite to the support tank 310 onto the upper deck 20. The protective shell 700 covers the side of the outer tank 200 opposite to the support tank 310 and is connected to the upper deck 20. On the one hand, the protective shell 700 can protect the outer tank 200 from seawater and rainwater corrosion. On the other hand, the connection between the protective shell 700 and the upper deck 20 can prevent seawater and rainwater from seeping down through the gap between the outer tank 200 and the upper deck 20.

[0072] In this embodiment, the protective shell 700 is hemispherical, and the center of the protective shell 700 coincides with the reference point 500, so as to reduce the volume of the liquid hydrogen storage system and improve the utilization rate of the chamber capacity.

[0073] Furthermore, the inner wall of the protective shell 700 is spaced apart from the outer wall of the outer tank 200 to reduce the heat transfer between the protective shell 700 and the outer tank 200.

[0074] It should be noted that the upper deck 20 is located above the base deck 10. Both the upper deck 20 and the base deck 10 are common structures in the field, and their specific structures will not be described in detail here.

[0075] Optionally, the inner tank 100, inner reinforcing rib 110, and third reinforcing rib 120 are all in direct contact with liquid hydrogen at -253°C. Therefore, the inner tank 100, inner reinforcing rib 110, and third reinforcing rib 120 are all made of 304 stainless steel. 304 stainless steel has good low-temperature properties and certain resistance to hydrogen embrittlement and hydrogen permeation. This reduces the thermal conductivity of the inner tank 100, inner reinforcing rib 110, and third reinforcing rib 120, while also reducing the probability of the inner tank 100, inner reinforcing rib 110, and third reinforcing rib 120 undergoing ductile-brittle transition, and preventing liquid hydrogen leakage.

[0076] Optionally, the inner web plate 411 is in direct contact with the inner tank 100, and the inner tank 100 stores liquid hydrogen at -253°C. Therefore, the inner web plate 411 is made of 304 stainless steel to reduce the thermal conductivity of the inner web plate 411 and lower the probability of the inner web plate 411 undergoing a ductile-brittle transition.

[0077] Optionally, the outer tank 200, outer reinforcing rib 210, outer web plate 421, fourth reinforcing rib 220, and connector 320 are all made of 304 stainless steel to reduce heat transfer between the inner tank 100 and the outer tank 200.

[0078] The materials for the protective shell 700, support barrel 310, base deck 10, upper deck 20, first reinforcing rib 330, and second reinforcing rib 340 can be selected through finite element temperature field analysis. Appropriate materials and steel grades can be chosen based on the analyzed structure. The finite element temperature field analysis method is existing technology in this field and will not be elaborated upon here.

[0079] This embodiment also provides a ship, which includes a hull, a base deck 10, and the aforementioned liquid hydrogen storage system. The base deck 10 is mounted on the hull, and the first support assembly 300 is supported on the base deck 10. The ship employing the aforementioned liquid hydrogen storage system can improve the stability and reliability of the support for the inner tank 100, and also reduce the heat conduction channels between the inner tank 100 and the outer tank 200, which is beneficial for reducing the heat conduction between the liquid hydrogen and the external environment.

[0080] Optionally, the hull has a double bottom and double hull structure, specifically, such as Figure 1 As shown, the hull is equipped with a ballast tank 30, which can be empty or filled with ballast water. The amount of ballast water is adjusted according to the actual amount of liquid hydrogen transported to maintain the stability of the hull during navigation.

[0081] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A liquid hydrogen storage system, characterized in that, include: An inner tank (100) for containing liquid hydrogen; An outer tank (200) is provided, and an inner tank (100) is disposed inside the outer tank (200). The outer wall of the inner tank (100) is spaced apart from the inner wall of the outer tank (200). A first support assembly (300) is connected to the outer tank (200) and is used to support the vessel on the base deck (10). The second support component (400) is supported between the outer wall of the inner tank (100) and the inner wall of the outer tank (200). There are multiple second support components (400), and the multiple second support components (400) are evenly distributed along the circumference of the outer tank (200) at the same height.

2. The liquid hydrogen storage system according to claim 1, characterized in that, Both the inner tank (100) and the outer tank (200) are spherical, and the center of the inner tank (100) and the center of the outer tank (200) coincide at a reference point (500).

3. The liquid hydrogen storage system according to claim 2, characterized in that, The height of the second support component (400) is lower than the height of the reference point (500).

4. The liquid hydrogen storage system according to claim 2, characterized in that, The first support assembly (300) includes a support barrel (310) with its axis extending vertically. The support barrel (310) is used to support the base deck (10), and at least a portion of the outer tank (200) is embedded in the support barrel (310).

5. The liquid hydrogen storage system according to claim 4, characterized in that, The first support assembly (300) further includes a connector (320), which is connected between the outer wall of the outer tank (200) and the inner wall of the support barrel (310). In the vertical direction, the height of the middle part of the connector (320) is the same as the height of the reference point (500). And / or, the first support assembly (300) further includes a first reinforcing rib (330), the first reinforcing rib (330) being disposed on the outer wall of the support barrel (310), the first reinforcing rib (330) extending circumferentially along the support barrel (310) and being connected end to end; And / or, the first support assembly (300) further includes a second reinforcing rib (340), which is disposed on the outer wall of the support barrel (310) along the vertical direction.

6. The liquid hydrogen storage system according to any one of claims 1-5, characterized in that, The second support assembly (400) includes an inner support structure (410), an outer support structure (420), and a support member (430). The inner support structure (410) is connected to the outer wall of the inner tank (100), the outer support structure (420) is connected to the inner wall of the outer tank (200), and the support member (430) is sandwiched between the inner support structure (410) and the outer support structure (420). The support member (430) is a fiberglass element, a Teflon element, or a wooden element.

7. The liquid hydrogen storage system according to claim 6, characterized in that, The inner support structure (410) includes an inner web plate (411) and an inner support plate (412). One side wall of the inner web plate (411) is connected to the outer wall of the inner tank (100), and the other side wall of the inner web plate (411) is connected to the inner support plate (412). The outer support structure (420) includes an outer web plate (421) and an outer support plate (422). One side wall of the outer web plate (421) is connected to the inner wall of the outer tank (200), and the other side wall of the outer web plate (421) is connected to the outer support plate (422). The support member (430) is sandwiched between the inner support plate (412) and the outer support plate (422).

8. The liquid hydrogen storage system according to claim 7, characterized in that, The inner support plate (412) has an inner limiting groove on the side facing the outer support plate (422), and the outer support plate (422) has an outer limiting groove (423) on the side facing the inner support plate (412). One side of the support member (430) is engaged in the inner limiting groove, and the other side of the support member (430) is engaged in the outer limiting groove (423).

9. The liquid hydrogen storage system according to any one of claims 1-5, characterized in that, The space between the outer wall of the inner tank (100) and the inner wall of the outer tank (200) is a vacuum cavity; And / or, a heat insulation layer (600) is provided between the outer wall of the inner tank (100) and the inner wall of the outer tank (200).

10. A ship, characterized in that, The system includes a hull, a base deck (10), and a liquid hydrogen storage system as described in any one of claims 1-9, wherein the base deck (10) is disposed on the hull and the first support assembly (300) is supported on the base deck (10).

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