Honeycomb sandwich type vacuum insulation panel and vacuum insulation panel system

Abstract

The invention relates to a honeycomb sandwich type vacuum insulation panel and a vacuum insulation panel system, and provides the honeycomb sandwich type vacuum insulation panel and the vacuum insulation panel system. An insulating panel mounted between a main gas barrier and an auxiliary gas barrier of a low-temperature liquid fuel tank is formed as a honeycomb sandwich panel having a honeycomb structure, so that insulation of the low-temperature liquid fuel tank can be improved and maximized, and heat loss thereof can be minimized. The cryogenic liquid fuel tank includes a primary gas barrier, an insulating panel, and a secondary gas barrier such that cryogenic liquid fuel containing liquefied hydrogen is contained therein, the cryogenic liquid fuel tank including: a honeycomb sandwich panel mounted between the primary gas barrier and the secondary gas barrier to insulate the cryogenic liquid fuel tank; a vacuum film accommodating and evacuating the honeycomb sandwich panel; and a breakage-proof pad installed at each corner of the honeycomb sandwich panel in contact with the vacuum film and preventing damage to the vacuum film.

Description

Technical Field

[0001] This application claims priority to Korean Patent Application No. 10-2022-0078871, filed on June 28, 2022, the disclosure of which is incorporated herein by reference.

[0002] The present invention relates to a honeycomb sandwich type vacuum insulation panel and a multi-layer vacuum insulation panel system. Background Art

[0003] In recent years, the demand for energy has continued to increase due to the development of industrialization and the increase in population, and due to the depletion of fossil fuels, alternative energy supplies are urgently needed.

[0004] Particularly, in the case of South Korea, although energy consumption ranks among the top 10 in the world, more than 90% of the energy used depends on external imports, so measures to secure energy are urgently needed.

[0005] Meanwhile, liquefied natural gas (LNG) refers to a colorless, transparent, cryogenic liquid made by cooling natural gas, which is mainly composed of methane, to -163°C, reducing its volume to one-six hundredth.

[0006] This use of liquefied natural gas as an energy source has led to the development of liquefied cargo ships capable of transporting liquefied cargo consisting of large amounts of liquefied natural gas by sea. Such liquefied cargo ships are equipped with liquefied hydrogen tanks for storing and maintaining liquefied natural gas (LNG) that has been liquefied into a cryogenic state.

[0007] Depending on whether the load of liquefied cargo acts directly, liquid hydrogen storage tanks can be divided into independent type and membrane type, and the independent type can be further divided into type B and type C.

[0008] Here, the membrane type liquefied hydrogen tank is configured to include a main gas barrier, an insulating panel and a secondary gas barrier to store low-temperature liquefied hydrogen (LH2) at -250°C or higher, prevent liquefied natural gas (LNG) from evaporating under a low temperature environment, and more stably prevent leakage of gas.

[0009] The main gas barrier is composed of a corrugated diaphragm made of stainless steel (SUS, STS) and is in direct contact with liquefied natural gas (LNG), and the secondary gas barrier is installed outside the main gas barrier and has a property of preventing gas leakage in the event of damage to the main gas barrier.

[0010] The insulating panel is formed of a polyurethane foam type and is interposed between the primary gas barrier and the secondary gas barrier to prevent liquefied natural gas (LNG) from evaporating.

[0011] As described above, when a liquid hydrogen tank is installed on a transport vehicle such as a ship, additional loads due to movement of supports and frequent refilling, fatigue loads due to pressure changes caused by waves in the internal fluid, and thermal loads due to temperature differences inside the tank need to be considered, requiring a highly robust design.

[0012] However, the insulation panels of conventional liquid hydrogen tanks are made of flexible materials with low structural robustness.

[0013] Therefore, there is a need for a liquid hydrogen tank having a structure capable of minimizing heat loss to cryogenic temperatures and satisfying structural robustness to various loads.

[0014] [Prior art literature]

[0015] [Patent Document]

[0016] (Patent Document 1) Korean Registered Patent No. 10-2180562 Summary of the invention

[0017] Technical issues

[0018] An object of the present disclosure is to provide a honeycomb sandwich type vacuum insulation panel which can minimize heat loss and improve and maximize the insulation of a cryogenic liquid fuel storage tank by forming an insulation panel installed between a primary gas barrier and a secondary gas barrier of the cryogenic liquid fuel storage tank into a honeycomb sandwich panel with a honeycomb structure.

[0019] In addition, an object of the present disclosure is to provide a honeycomb sandwich type multi-layer vacuum insulation panel system, which is capable of blocking external leakage of leaked cryogenic liquid fuel and ensuring structural robustness against various loads in the event that cryogenic liquid fuel including liquid hydrogen leaks from a cryogenic liquid fuel storage tank by forming a plurality of honeycomb sandwich panels which are arranged in a plurality of layers and then stacked in a plurality of layers.

[0020] However, the technical problems to be solved by the present disclosure are not limited to the above problems, and those skilled in the art can clearly understand other problems not mentioned from the description of the present disclosure described below.

[0021] Technical Solution

[0022] In order to achieve the above-mentioned purpose, in a cryogenic liquid fuel storage tank, the cryogenic liquid fuel storage tank includes a main gas barrier, an insulating panel and a secondary gas barrier for containing cryogenic liquid fuel containing liquid hydrogen in the cryogenic liquid fuel storage tank; the honeycomb sandwich type vacuum insulation panel according to the present disclosure includes: a honeycomb sandwich panel, which is installed between the main gas barrier and the secondary gas barrier to insulate the cryogenic liquid fuel storage tank; a vacuum membrane, which contains the honeycomb sandwich panel inside and evacuates the vacuum membrane; and an anti-damage pad, which is installed at each corner of the honeycomb sandwich panel in contact with the vacuum membrane to prevent the vacuum membrane from being damaged.

[0023] In one embodiment, the honeycomb sandwich panel may include a honeycomb structure in which a plurality of honeycombs are connected and formed, and a composite panel installed in the honeycomb structure.

[0024] As a specific embodiment, the honeycomb structure may include the plurality of honeycombs formed with opened upper and lower portions, filling spaces formed within the honeycombs, and an insulating material filled in each of the filling spaces.

[0025] In another specific embodiment, the insulating material may include at least one of air, vacuum, aerogel or insulating powder.

[0026] In one embodiment, the honeycomb structure can be used alone or with the composite panels mounted on the top and bottom surfaces of the honeycomb structure.

[0027] In another embodiment, the composite panel may be formed of a composite material of resin and glass fiber or carbon fiber or aramid fiber or composite fiber.

[0028] As another embodiment, the anti-breakage pad may be a semicircular cover, wherein an insertion groove corresponding to the shape of the corner may be formed in the anti-breakage pad for insertion and connection of each corner of the honeycomb sandwich panel.

[0029] The honeycomb sandwich type vacuum insulation panel system according to the present disclosure is characterized in that the honeycomb sandwich type vacuum insulation panel is accommodated in a leakage-proof barrier and is evacuated.

[0030] In one embodiment, the anti-leakage barrier can be made of nylon, LLDPE, PET, PI, EVOH and AlO x Any one or more insulating materials.

[0031] In another embodiment, a plurality of honeycomb sandwich type vacuum insulation panels may be disposed in the anti-leakage barrier in a thickness direction and stacked.

[0032] Beneficial Effects

[0033] The present disclosure having the configuration as described above has the effects that insulation of a cryogenic liquid fuel tank can be improved and maximized, heat loss to cryogenic temperatures can be minimized, structural robustness to various loads can be ensured, and lightness of an insulation panel can be achieved.

[0034] In addition, the present invention can ensure structural robustness that cannot be guaranteed by conventional insulating panel structures, and is suitable for cryogenic liquid fuel storage tanks for transshipment because the honeycomb sandwich panels are arranged in multiple layers in the thickness direction and then stacked into multiple layers, thereby ensuring safety through the honeycomb sandwich panels when leakage occurs in the cryogenic liquid fuel storage tank, and it can be applied as a prismatic membrane type widely used in cargo holds of LNG ships to improve loading efficiency.

[0035] Furthermore, the present disclosure has the effect that the insulation panel can be formed into a honeycomb sandwich panel of a honeycomb structure and attached to a cryogenic liquid fuel storage tank for easy installation without mechanical connection, and the insulation performance can be improved by directly attaching and installing the insulation panel to the cryogenic liquid fuel storage tank.

[0036] However, technical effects that can be obtained through the present disclosure are not limited to the above-mentioned effects, and other effects that are not mentioned can be clearly understood by those skilled in the art through the description of the present disclosure described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a perspective view schematically showing a honeycomb sandwich type vacuum insulation panel according to the present disclosure.

[0038] Figure 2 is an exploded perspective view schematically showing a honeycomb sandwich type vacuum insulation panel according to the present disclosure.

[0039] Figure 3 is a side view schematically showing a honeycomb sandwich type vacuum insulation panel according to the present disclosure.

[0040] Figure 4 is a diagram schematically showing a honeycomb sandwich panel of a honeycomb sandwich type vacuum insulation panel according to the present disclosure, and is Figure 3 Enlarged plan view of section A.

[0041] Figure 5 is a diagram schematically showing an anti-breakage pad installed on a honeycomb sandwich panel of a honeycomb sandwich type vacuum insulation panel according to the present disclosure, and is Figure 3 An enlarged plan view of section B.

[0042] Figure 6is a side view schematically showing a honeycomb sandwich type vacuum insulation panel system according to one embodiment of the present disclosure.

[0043] Figure 7 is a side view schematically showing a multi-layer stacked honeycomb sandwich type vacuum insulation panel system according to one embodiment of the present disclosure.

[0044] Figure 8 is a side view schematically showing a honeycomb sandwich type vacuum insulation panel system according to another embodiment of the present disclosure.

[0045] Fig. 9 is a side view schematically showing an example of a multi-layer stacked honeycomb sandwich type vacuum insulation panel system according to another embodiment of the present disclosure.

[0046] Fig.10 is a side view schematically showing another example of a multi-layer stacked honeycomb sandwich type vacuum insulation panel system according to another embodiment of the present disclosure.

[0047] [Explanation of Reference Numerals]

[0048] 1, 1', ..., 1 n :Honeycomb sandwich type vacuum insulation panel

[0049] 3, 3': Polyurethane foam type vacuum insulation panel

[0050] 5: Anti-leakage barrier

[0051] 10: Honeycomb sandwich panel

[0052] 11: Honeycomb structure

[0053] 11a: Honeycomb

[0054] 12: Filling space

[0055] 16, 16': Composite panel

[0056] 17: Insulation material

[0057] 30: Vacuum membrane

[0058] 31: Vacuum port

[0059] 50: Anti-breakage pad

[0060] 51: Insert into groove

[0061] 100, 100', 100", 200, 200a, 200a', 200a", 200b, 200b', 200b": Honeycomb sandwich type vacuum insulation panel system

[0062] 500: Cryogenic liquid fuel tank

[0063] 501: Primary Gas Barrier

[0064] 503: Secondary gas barrier DETAILED DESCRIPTION

[0065] The present disclosure relates to a cryogenic liquid fuel tank, which includes a main gas barrier, an insulating panel and a secondary gas barrier for containing a cryogenic liquid fuel containing liquid hydrogen in the cryogenic liquid fuel tank. A honeycomb sandwich type vacuum insulation panel and a vacuum insulation panel system are provided, wherein the honeycomb sandwich type vacuum insulation panel includes: a honeycomb sandwich panel installed between the main gas barrier and the secondary gas barrier to insulate the cryogenic liquid fuel tank; a vacuum membrane, which contains the honeycomb sandwich panel inside and evacuates the vacuum membrane; and an anti-breakage pad installed at each corner of the honeycomb sandwich panel in contact with the vacuum membrane to prevent the vacuum membrane from being broken.

[0066] Mode for the Invention

[0067] The present disclosure may have various modifications and various embodiments, and specific embodiments are shown in the drawings and described in detail herein. However, it should be understood that the present disclosure is not limited to specific embodiments, and includes all modifications, equivalents or substitutes within the spirit and technical scope of the present disclosure.

[0068] When describing the corresponding drawings, the same reference numerals are used for the same parts. In the drawings, for the sake of clarity of the present disclosure, the size of the structure is shown in a larger scale than the actual. Terms such as first, second, etc. can be used to describe various components, but these components should not be limited by these terms. These terms are only used for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present disclosure, a first component can be named as a second component, and similarly, a second component can be named as a first component. Unless the context clearly indicates otherwise, a singular form of expression includes the plural.

[0069] The terms "include", "comprising" and "having" used herein indicate the presence of features, quantities, steps, actions, parts or components or combinations thereof described in the specification, and it should be understood that the possibility of the presence or addition of one or more other features, quantities, steps, actions, parts, components or combinations thereof is not excluded in advance. In addition, in the present disclosure, when a portion of a layer, film, region, plate, etc. is disposed "on" another portion, this includes not only the case where one portion is "directly" disposed "on" another portion, but also the case where another portion is inserted therebetween. On the contrary, when a portion of a layer, film, region, plate, etc. is disposed "below" another portion, this includes not only the case where one portion is "directly" disposed "below" another portion, but also the case where another portion is inserted therebetween. In addition, in the present application, "on" may include not only the case where it is disposed on the upper portion, but also the case where it is disposed on the lower portion.

[0070] Hereinafter, preferred embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0071] Figure 1 is a perspective view schematically showing a honeycomb sandwich type vacuum insulation panel according to the present disclosure. Figure 2 is an exploded perspective view schematically showing a honeycomb sandwich type vacuum insulation panel according to the present disclosure. Figure 3 is a side view schematically showing a honeycomb sandwich type vacuum insulation panel according to the present disclosure. Figure 4 is a diagram schematically showing a honeycomb sandwich panel of a honeycomb sandwich type vacuum insulation panel according to the present disclosure, and is Figure 3 Enlarged plan view of section A. Figure 5 is a diagram schematically showing an anti-breakage pad installed on a honeycomb sandwich panel of a honeycomb sandwich type vacuum insulation panel according to the present disclosure, and is Figure 3 Enlarged plan view of section B. Figure 6 is a side view schematically showing a honeycomb sandwich type vacuum insulation panel system according to one embodiment of the present disclosure. Figure 7 is a side view schematically showing a multi-layer stacked honeycomb sandwich type vacuum insulation panel system according to one embodiment of the present disclosure. Figure 8 is a side view schematically showing a honeycomb sandwich type vacuum insulation panel system according to another embodiment of the present disclosure. Fig. 9 is a side view schematically showing an example of a multi-layer stacked honeycomb sandwich type vacuum insulation panel system according to another embodiment of the present disclosure. Fig.10 is a side view schematically showing another example of a multi-layer stacked honeycomb sandwich type vacuum insulation panel system according to another embodiment of the present disclosure.

[0072] As shown in the figure, the honeycomb sandwich type vacuum insulation panel 1 according to the present disclosure includes a honeycomb sandwich panel 10, a vacuum membrane 30 and an anti-breakage pad 50, and the honeycomb sandwich type vacuum insulation panel 1 is used to insulate a cryogenic liquid fuel storage tank 500, in which cryogenic liquid fuel including liquid hydrogen and the like is contained.

[0073] Specifically, the honeycomb sandwich panel 10 is installed between a primary gas barrier 501 and a secondary gas barrier 503 arranged in a flat hexahedral cryogenic liquid fuel storage tank 500 for insulating the cryogenic liquid fuel storage tank 500, and the honeycomb sandwich panel 10 includes a honeycomb structure 11 formed by connecting a plurality of honeycombs 11a, and composite panels 16, 16' installed in the honeycomb structure 11.

[0074] Here, the honeycomb structure 11 includes a plurality of honeycombs 11 a formed with open upper and lower portions, filling spaces 12 formed inside the honeycombs 11 a , and an insulating material 17 filled in each of the filling spaces 12 to improve insulating properties of the honeycomb sandwich panel 10 .

[0075] In this case, the insulating material 17 may include at least one of air, vacuum, aerogel, or insulating powder.

[0076] In one embodiment of the present disclosure, if the filling space 12 is filled to promote insulation of the honeycomb sandwich panel 10, the filling space 12 of each honeycomb 11a is filled with air, vacuum, aerogel or insulating powder as the insulating material 17, but various modifications may be made without limitation thereto.

[0077] Meanwhile, composite panels 16 , 16 ′ are mounted on the top and bottom surfaces of the honeycomb structure 11 , respectively.

[0078] Here, the composite panels 16, 16' are formed as flat panels (FP) or corner panels (CP), and are respectively bonded and mounted on the open upper and lower portions of a plurality of honeycombs 11a formed in the honeycomb structure 11 so that the upper and lower portions of the honeycombs 11a can be sealed and airtightly handled.

[0079] At this time, the honeycomb structure 11 formed by connecting multiple honeycombs 11a is preferably formed in a square or rectangular form in terms of the overall outline, and composite panels 16, 16' of a size corresponding to the size of the honeycomb structure 11 are preferably installed on the top and bottom surfaces of the honeycomb structure 11, but the horizontal and vertical lengths of the honeycomb structure 11 corresponding to the area of ​​the cryogenic liquid fuel storage tank 500 can also be formed and installed.

[0080] In addition, the honeycomb structure 11 can also be formed as a single piece, and composite panels 16, 16' of corresponding sizes are installed on the top and bottom surfaces of the honeycomb structure 11 in the form of a rectangular parallelepiped or a cube, and then each honeycomb structure 11 manufactured as a single piece is manufactured and applied by interconnecting and connecting them to correspond to the length required on site, and the thickness of the honeycomb structure 11 can also be changed in various ways.

[0081] In the present disclosure, the honeycomb structure 11 and the composite panels 16 , 16 ′ are formed in the form of a rectangular parallelepiped, but this is only an example and is not limited thereto, and various modifications may be made.

[0082] Meanwhile, in the present disclosure, the composite panels 16, 16' are respectively installed on the top and bottom surfaces of the honeycomb structure 11, but the composite panels 16, 16' may also be respectively installed on each side of the honeycomb structure 11, and other various modifications may be made.

[0083] The composite panels 16, 16' may be formed as a composite material of resin and glass fibers or carbon fibers or aramid fibers or synthetic fibers.

[0084] In other words, the composite panels 16 , 16 ′ may be formed of a composite material of resin and glass fibers, or a composite material of resin and carbon fibers, or a composite material of resin and aramid fibers, or a composite material of resin and synthetic fibers.

[0085] The vacuum film 30 accommodates the honeycomb sandwich panel 10 inside and evacuates the honeycomb sandwich panel.

[0086] To this end, the vacuum film 30 can be formed into two layers so as to form an accommodating space for accommodating the honeycomb sandwich panel 10 inside, wherein one layer of the vacuum film 30 is arranged to contact the lower portion or one side surface of the honeycomb sandwich panel 10, and the other layer of the vacuum film 30 is arranged on the upper portion or another side surface of the honeycomb sandwich panel 10, and then the corresponding edges of the vacuum film 30 are heat-melted.

[0087] At this time, the vacuum port 31 is protrudingly formed at one side of the vacuum film 30, and the vacuum film 30 may be vacuumed through the vacuum port 31. Here, the position of the vacuum port 31 may be variously modified.

[0088] Meanwhile, the vacuum film 30 may be made of a nylon material that is not easily damaged or broken by external impact, but is not limited thereto.

[0089] The anti-breakage pad 50 is installed at each corner of the honeycomb sandwich panel 10 in contact with the vacuum membrane 30 to prevent the vacuum membrane 30 from being broken by the sharp edge of the honeycomb sandwich panel 10 .

[0090] To this end, the anti-breakage pad 50 is a semicircular cover body in which an insertion groove 51 corresponding to the shape of the corner is formed for insertion and coupling of each corner of the honeycomb sandwich panel 10 .

[0091] In this case, the anti-breakage pad 50 may be made of nylon material.

[0092] Meanwhile, the honeycomb sandwich panel 10 according to the present disclosure may be used by using the honeycomb structure 11 alone or by mounting the composite panels 16 , 16 ′ on the top and bottom surfaces of the honeycomb structure 11 .

[0093] Here, in the case of using the honeycomb structure 11 alone, the filling space 12 formed in the multiple honeycombs 11a of the honeycomb structure 11 can be filled with the insulating material 17, and the honeycomb structure 11 filled with the insulating material 17 can be vacuumed by installing the anti-breakage pad 50 in the vacuum film 30 after installation.

[0094] In this case, the length of the insertion groove 51 of the anti-breakage mat 50 in the vertical direction may be formed to correspond to the thickness of the honeycomb structure 11 without the composite panels 16 , 16 ′.

[0095] Hereinafter, a method of manufacturing a honeycomb sandwich type vacuum insulation panel according to the present disclosure will be briefly described with reference to the accompanying drawings.

[0096] First, the filling space 12 formed in each of the cells 11a of the honeycomb structure 11 formed in a certain length is filled with the insulating material 17. In this case, each of the filling spaces 12 is filled with at least one of air, vacuum, aerogel, or insulating powder.

[0097] Then, the honeycomb sandwich panel 10 is manufactured by mounting the composite panels 16 , 16 ′ on the top and bottom surfaces of the honeycomb structure 11 .

[0098] The anti-breakage pad 50 is installed at each corner of the honeycomb sandwich panel 10 manufactured in this way. In this case, the insertion groove 51 of the anti-breakage pad 50 is inserted into the corresponding corner of the honeycomb sandwich panel 10.

[0099] Then, after the honeycomb sandwich panel 10 is installed to be accommodated in the vacuum film 30 , the vacuum film 30 is evacuated through the vacuum port 31 of the vacuum film 30 to manufacture the honeycomb sandwich type vacuum insulation panel 1 .

[0100] The honeycomb sandwich type vacuum insulation panel 1 manufactured as described above may be installed between the primary gas barrier 501 and the secondary gas barrier 503 of the cryogenic liquid fuel storage tank 500 to insulate the cryogenic liquid fuel storage tank 500 .

[0101] At the same time, if Figure 6As shown, the honeycomb sandwich type vacuum insulation panel 1 according to the present disclosure may be accommodated in an anti-leakage barrier 5 and evacuated to form a honeycomb sandwich type vacuum insulation panel system 100 .

[0102] In this case, the leakage prevention barrier 5 may be made of a nylon material that is not easily torn or broken by external impact.

[0103] In one embodiment of the present disclosure, the anti-leakage barrier 5 is made of nylon material, but it is preferred that the anti-leakage barrier 5 is made of insulating material.

[0104] Specifically, the anti-leakage barrier 5 can be made of a combination of insulating materials, which includes any one or more of the following: LLDPE (lined low density polyethylene), PET or PI made by aluminum deposition, EVOH (vinyl alcohol), AlOx (aluminum oxide), but is not limited to this, and various other modifications can be made.

[0105] Meanwhile, a vacuum port (not shown) is also formed in the anti-leakage barrier 5 for evacuating the honeycomb sandwich type vacuum insulation panel 1 accommodated therein. Also, the position of the vacuum port may be variously modified.

[0106] Here, the honeycomb sandwich type vacuum insulation panels 1, 1', ..., 1 are contained in the anti-leakage barrier 5. n The honeycomb sandwich type vacuum insulation panel 1, 1', ..., 1 is provided as at least one piece but contained in the anti-leakage barrier 5. n A plurality of pieces may be provided with respect to the thickness direction of the vacuum insulation panel 1 .

[0107] As described above, a plurality of honeycomb sandwich type vacuum insulation panels 1, 1', ..., 1 n It may be arranged in a thickness direction and accommodated in the anti-leakage barrier 5 , and then evacuated to form a honeycomb sandwich type vacuum insulation panel system 100 .

[0108] Therefore, between the primary gas barrier 501 and the secondary gas barrier 503 provided in the cryogenic liquid fuel storage tank 500, as shown in FIG. Figure 7 As shown, the honeycomb sandwich type vacuum insulation panel system 100, 100', 100" according to one embodiment of the present disclosure can insulate the cryogenic liquid fuel storage tank 500 by forming a plurality of honeycomb sandwich type vacuum insulation panel systems 100, 100', 100" arranged in a horizontal direction of the vacuum insulation panel system 100 to form a multilayer.

[0109] At the same time, if Figure 8As shown, a honeycomb sandwich type vacuum insulation panel system 200 according to another embodiment of the present disclosure may be arranged into a plurality of honeycomb sandwich type vacuum insulation panels 1, 1' and polyurethane foam type vacuum insulation panels 3, 3' in an anti-leakage barrier 5 with respect to a thickness direction.

[0110] In other words, the polyurethane foam type vacuum insulation panels 3, 3' and the honeycomb sandwich type vacuum insulation panels 1, 1' which are generally used between the main gas barrier 501 and the secondary gas barrier 503 set in the cryogenic liquid fuel storage tank 500 are arranged in the anti-leakage barrier 5 in the thickness direction, but the polyurethane foam type vacuum insulation panels 3, 3' and the honeycomb sandwich type vacuum insulation panels 1, 1' are alternately mixed and arranged to form a honeycomb sandwich type vacuum insulation panel system 200.

[0111] In this way, the honeycomb sandwich type vacuum insulation panel system 200 is manufactured by mixing the polyurethane foam type vacuum insulation panels 3, 3' and the honeycomb sandwich type vacuum insulation panels 1, 1' and arranging them in the anti-leakage barrier 5. When the manufactured vacuum insulation panel system 200 is applied to the cryogenic liquid fuel storage tank 500, the honeycomb sandwich type vacuum insulation panels and the vacuum insulation panel system 200 can only be applied to the extent of meeting the minimum structural strength and rigidity required by the cryogenic liquid fuel storage tank 500.

[0112] In other words, since the vacuum insulation panel system 100 including only the honeycomb sandwich type vacuum insulation panels 1, 1' is installed in the cryogenic liquid fuel storage tank 500, the structural strength and rigidity may be higher than required, such as Figure 8 As shown, it is therefore necessary to use a mixture of polyurethane foam type vacuum insulation panels 3, 3' and honeycomb sandwich type vacuum insulation panels 1, 1' having different heat transfer coefficients to manufacture a vacuum insulation panel system 200, which can be advantageous in terms of cost compared to a vacuum insulation panel system 100 that only includes honeycomb sandwich type vacuum insulation panels 1, 1', and can meet the structural robustness and rigidity required in the field.

[0113] Here, a honeycomb sandwich type vacuum insulation panel system 200 is formed by mixing polyurethane foam type vacuum insulation panels 3, 3' and honeycomb sandwich type vacuum insulation panels 1, 1', wherein the vacuum insulation panel system 200 is horizontally arranged between a main gas barrier 501 and a secondary gas barrier 503 arranged in a cryogenic liquid fuel storage tank 500 to form a multi-layer, so that the cryogenic liquid fuel storage tank 500 can be insulated.

[0114] In this case, if Fig. 9As shown, any one of the multi-layer stacked vacuum insulation panel systems 200a includes polyurethane foam type vacuum insulation panels 3, 3' and honeycomb sandwich type vacuum insulation panels 1, 1' alternately arranged relative to the thickness direction, and another vacuum insulation panel system 200a' arranged in its horizontal direction is arranged in the opposite alternating manner, wherein the polyurethane foam type vacuum insulation panels 3, 3' and honeycomb sandwich type vacuum insulation panels 1, 1' are arranged, and another vacuum insulation panel system 200a" stacked in its horizontal direction can be formed in the same form as any one of the vacuum insulation panel systems 200a, so that the polyurethane foam type vacuum insulation panels 3, 3' and honeycomb sandwich type vacuum insulation panels 1, 1' are alternately stacked at the same position relative to the horizontal direction of each of the vacuum insulation panel systems 200a, 200a', 200a".

[0115] In other words, between the main gas barrier 501 and the secondary gas barrier 503 arranged in the cryogenic liquid fuel storage tank 500, the honeycomb sandwich type vacuum insulation panels 1, 1' are located at the upper or lower part of the thickness direction of the polyurethane foam type vacuum insulation panels 3, 3', and the honeycomb sandwich type vacuum insulation panels 1, 1' are located at the upper or lower part of the thickness direction of the polyurethane foam type vacuum insulation panels 3, 3' and are positioned so that the polyurethane foam type vacuum insulation panels 3, 3' and the honeycomb sandwich type vacuum insulation panels 1, 1' are alternately stacked relative to the thickness direction, and then each vacuum insulation panel 1, 1' is arranged in the horizontal direction to form a multi-layer stacked honeycomb sandwich type vacuum insulation panel system 200a, 200a', 200a".

[0116] According to the structure as described above, by installing the honeycomb sandwich type vacuum insulation panel system 200 of the present disclosure in the cryogenic liquid fuel storage tank 500, the cryogenic liquid fuel storage tank 500 storing liquefied natural gas in a cryogenic state can be insulated and prevented from being damaged or broken due to thermal shock.

[0117] At the same time, if Fig.10 As shown, any multi-layer stacked vacuum insulation panel system 200b includes polyurethane foam type vacuum insulation panels 3, 3' and honeycomb sandwich type vacuum insulation panels 1, 1' alternately arranged relative to the thickness direction, and another vacuum insulation panel system 200b' and another vacuum insulation panel system 200b" arranged in the horizontal direction are also composed of polyurethane foam type vacuum insulation panels 3, 3' and honeycomb sandwich type vacuum insulation panels 1, 1' alternately arranged relative to the thickness direction, so that the polyurethane foam type vacuum insulation panels 3, 3' are located at the same position in the horizontal direction relative to each of the vacuum insulation panel systems 200b, 200b', 200b", or the honeycomb sandwich type vacuum insulation panels 1, 1' are stacked so that the polyurethane foam type vacuum insulation panels 3, 3' are located at the same position.

[0118] In other words, the polyurethane foam type vacuum insulation panels 3, 3' are continuously arranged in the horizontal direction between the main gas barrier 501 and the secondary gas barrier 503 arranged in the low-temperature liquid fuel storage tank 500, or the honeycomb sandwich type vacuum insulation panels 1, 1' are continuously arranged and positioned in the horizontal direction of the honeycomb sandwich type vacuum insulation panels 1, 1', etc., so that the same vacuum insulation panels can be repeatedly stacked with respect to the thickness direction and the horizontal direction to form a vacuum insulation panel system 200b.

[0119] Although the honeycomb sandwich panel 10, honeycomb sandwich type vacuum insulation panel 1 and vacuum insulation panel system 100 of the present invention are described as examples, they are installed between the main gas barrier 501 and the secondary gas barrier 503 of the flat hexahedral membrane type cryogenic liquid fuel storage tank 500 to isolate the cryogenic liquid fuel storage tank 500, and are not limited to the cryogenic liquid fuel storage tank 500 used in liquefied cargo ships. It is obvious that the above structure can also be applied to marine structures, building structures or civil structures, etc. to minimize heat loss and meet the structural robustness to various loads, and can be applied to various other fields.

[0120] As described above, the present disclosure has been described in more detail with respect to specific embodiments, but it will be apparent to those skilled in the art that various modifications and variations are possible without departing from the spirit and scope of the present disclosure as set forth in the appended claims.

[0121] Industrial Applicability

[0122] The present disclosure is a best invention which can improve and maximize the insulation of a cryogenic liquid fuel storage tank and minimize heat loss by forming an insulating panel installed between a primary gas barrier and a secondary gas barrier of the cryogenic liquid fuel storage tank into a honeycomb sandwich panel of a honeycomb structure.

Claims

1. A honeycomb sandwich type vacuum insulation panel, for a cryogenic liquid fuel tank, the cryogenic liquid fuel tank comprising a primary gas barrier, an insulation panel and a secondary gas barrier for containing a cryogenic liquid fuel containing liquid hydrogen in the cryogenic liquid fuel tank, The honeycomb sandwich type vacuum insulation panel comprises: a honeycomb sandwich panel installed between the primary gas barrier and the secondary gas barrier to insulate the cryogenic liquid fuel tank; A vacuum membrane, wherein the vacuum membrane contains the honeycomb sandwich panel and evacuates the honeycomb sandwich panel; as well as An anti-breakage pad is installed at each corner of the honeycomb sandwich panel in contact with the vacuum membrane to prevent the vacuum membrane from being damaged.

2. The honeycomb sandwich type vacuum insulation panel according to claim 1, in, The honeycomb sandwich panel comprises a honeycomb structure formed by connecting a plurality of honeycombs and a composite panel installed in the honeycomb structure.

3. The honeycomb sandwich type vacuum insulation panel according to claim 2, in, The honeycomb structure includes a plurality of honeycombs formed with opened upper and lower portions, filling spaces formed within the honeycombs, and an insulating material filled in each of the filling spaces.

4. The honeycomb sandwich type vacuum insulation panel according to claim 3, in, The insulating material includes at least one of air, vacuum, aerogel or insulating powder.

5. The honeycomb sandwich type vacuum insulation panel according to claim 2, in, The honeycomb structure is used alone or with the composite panels mounted on the top and bottom surfaces of the honeycomb structure.

6. The honeycomb sandwich type vacuum insulation panel according to claim 2, in, The composite panel is formed of a composite material of resin and glass fiber or carbon fiber or aramid fiber or composite fiber.

7. The honeycomb sandwich type vacuum insulation panel according to claim 1, in, The anti-breakage pad is a semicircular cover body, and an insertion groove corresponding to the shape of the corner is formed in the anti-breakage pad for insertion and connection of each corner of the honeycomb sandwich panel.

8. A honeycomb sandwich type vacuum insulation panel system, characterized in that: At least one honeycomb sandwich type vacuum insulation panel according to any one of claims 1 to 7 is accommodated in a leakage prevention barrier and is evacuated.

9. The honeycomb sandwich type vacuum insulation panel system according to claim 8, in, The anti-leakage barrier is made of nylon, LLDPE, PET, PI, EVOH and AlO x Any one or more insulating materials.

10. The honeycomb sandwich type vacuum insulation panel system according to claim 8, in, A plurality of honeycomb sandwich type vacuum insulation panels are arranged and stacked in the anti-leakage barrier in a thickness direction.

Images