KR102649343B1 - Vacuum insulated cryogenic tank - Google Patents

Abstract

The present invention relates to a vacuum insulated cryogenic tank. The purpose of the present invention is to provide a vacuum insulated cryogenic tank that includes a frame whose position does not change even when the tank contracts and expands, and has a vacuum insulated structure that can be applied not only to membrane tanks but also to independent tanks including a support. there is.

Description

Vacuum insulated cryogenic tank {Vacuum insulated cryogenic tank}

The present invention relates to a vacuum insulated cryogenic tank, and more specifically, to a device for vacuum insulating a cryogenic tank for storing and transporting liquefied gas in a cryogenic state.

In general, Liquefied Natural Gas (LNG) refers to a colorless and transparent ultra-low temperature liquid made by cooling natural gas containing methane as a main ingredient to -162℃ and reducing its volume to 1/600. As liquefied natural gas is used as an energy resource, various studies have been conducted to safely transport and store liquefied natural gas. To be specific, liquefied natural gas storage tanks are made of materials that can withstand ultra-low temperatures (aluminum alloy, stainless steel, 35% It must be made of nickel steel, etc.), and a design that can respond to thermal stress and thermal contraction and the installation of an insulation structure to prevent heat intrusion are required.

Recently, hydrogen has been acting as an energy carrier for renewable energy, which has increased the demand for hydrogen. In other words, solar and wind energy are used as energy sources to electrolyze water to produce hydrogen, which must be liquefied and stored in a liquid hydrogen tank for long-term use and long-distance transportation. At this time, since the boiling temperature of liquefied hydrogen is -250℃, which is lower than that of liquefied natural gas, it is necessary to design it more carefully so that it can be applied to an environment with a lower temperature than liquefied natural gas.

In this way, low-temperature tanks for storing liquefied natural gas or liquefied hydrogen can be classified into membrane type and self-supporting type depending on their structure. As disclosed in Korean Patent Publication No. 10-2017-0116584 (closed tank with corrugated sealing membrane, Oct. 19, 2017), the membrane-type tank is a membrane-type tank, and the inner surface of the tank in which the liquefied gas is stored is subject to thermal deformation due to the liquefied gas. A corrugated membrane sheet made of stainless steel is used to enable heat shrinkage, and is formed to form a secondary barrier supported on the hull of the transport ship and an insulation layer surrounding the outer surface to support the membrane sheet. This is done in a way that the hull supports the pressure generated inside the tank.

An independent tank constitutes an independent device in itself and includes its own support to enable independent installation. Meanwhile, as described above, in the case of a membrane-type tank, wrinkles are formed to prepare for thermal contraction/expansion, but when this wrinkle structure is applied to a stand-alone tank, the following problems arise. In the case of a vacuum insulated tank, it is formed with an inner tank that directly accommodates the liquefied gas, and an insulating material and a vacuum jacket surround the inner tank, and the support body is generally connected to the inner tank. Accordingly, the support must inevitably be provided in a form that penetrates the insulation and vacuum jacket. However, if the volume of the tank changes, significant stress is inevitably concentrated at the joint area between the insulation and vacuum jacket and the support. Moreover, when the tank volume repeatedly contracts and expands, the risk of rupture in the relevant area is quite high as fatigue accumulates. To avoid this problem, it is theoretically possible to introduce a design that allows the support to move in response to changes in tank volume, but it is difficult to implement this in practice due to the excessively high complexity and difficulty of the structure.

Korean Patent Publication No. 10-2017-0116584 (closed tank with corrugated sealing membrane, October 19, 2017)

Therefore, the present invention was created to solve the problems of the prior art as described above, and the object of the present invention is to include a frame whose position does not change even when the tank contracts/expands, so that it is not only applicable to membrane tanks but also supports The aim is to provide a vacuum insulated cryogenic tank having a vacuum insulated structure that can be applied to independent tanks including.

The vacuum insulated cryogenic tank 100 of the present invention for achieving the above-described object includes an inner tank 110 in which a fluid is stored; an insulating layer 120 surrounding the inner tank 110 and formed of a material capable of insulating; A vacuum jacket 130 formed to surround the insulation layer 120 and maintains airtightness from the outside by maintaining a vacuum inside; Jacket wrinkles 140 formed in an uneven shape on the wall of the vacuum jacket 130; A frame 150 formed to support the outer shape of the vacuum jacket 130; may include.

At this time, the vacuum jacket 130 is deformed by shrinking or expanding its wall according to pressure changes, but the frame 150 can be formed to maintain its shape regardless of pressure changes.

In addition, the vacuum jacket 130 is such that the wall surface other than the part fixed and supported by the frame 150 is deformed according to the pressure change, and the wall surface of the part fixed and supported by the frame 150 is maintained in a fixed position. can be formed.

Additionally, the jacket wrinkles 140 may be formed in a shape that does not contact or intersect the frame 150.

Additionally, the jacket wrinkles 140 may be formed in a closed curve shape included within a wall of the vacuum jacket 130 defined by the frame 150.

Additionally, the jacket wrinkles 140 may be formed in a circular or oval shape.

Additionally, the jacket wrinkles 140 may be formed on all or part of the walls of the vacuum jacket 130 divided by the frame 150.

Additionally, at least one jacket wrinkle 140 may be formed per wall of the vacuum jacket 130 divided by the frame 150.

In addition, when a plurality of jacket wrinkles 140 are formed on one wall of the vacuum jacket 130 divided by the frame 150, they may be formed in a form that does not contact or intersect each other.

Additionally, the jacket wrinkles 140 may be formed in the form of convexly protruding or concavely recessed grooves on the wall surface of the vacuum jacket 130.

In addition, when a plurality of the jacket wrinkles 140 are formed per wall of the vacuum jacket 130 divided by the frame 150, the jacket wrinkles 140 are formed only in a protruding form or in a recessed form within one surface. , both protruding and recessed shapes can be formed.

Additionally, the jacket wrinkles 140 may be formed in such a way that the wall surface of the vacuum jacket 130 protrudes convexly or recesses concavely in a stepwise manner.

In addition, when the jacket wrinkles 140 are formed on some of the walls of the vacuum jacket 130 divided by the frame 150, the wall surface on which the jacket wrinkles 140 are not formed is relatively small compared to the remaining walls. It may have a narrow area or be formed in a curved shape.

Additionally, the vacuum jacket 130 may be expanded to form a pre-designed shape and volume larger than the pre-designed shape and volume at atmospheric pressure and room temperature, so as to form a pre-designed shape and volume in an operating environment.

Additionally, the frame 150 may be formed in a form in which a plurality of links are connected. At this time, in the frame 150, the connecting portions of the links may be formed in a curved shape.

Additionally, the frame 150 may be connected to the wall of the vacuum jacket 130 by welding. At this time, the frame 150 may form frame wings 155 where the portion connected to the vacuum jacket 130 has a relatively thin thickness.

In the case of a conventional vacuum insulated cryogenic tank, a wrinkle structure was formed on the outside of the insulating layer to prepare for the contraction/expansion of the tank. In the case of a membrane type tank, there is no problem, but the position is fixed and it is provided with a support that penetrates the insulating layer. In the case of independent tanks, there was a problem of stress concentration and fatigue occurring around the support body during tank contraction/expansion.

However, according to the present invention, by including a frame structure whose position does not change even when the tank contracts or expands, it can be applied not only to membrane-type tanks, but also to independent tanks by using the frame as a support, which has a great effect. There is. In particular, the present invention introduces a design that minimizes stress concentration near the frame while allowing smooth contraction/expansion of the tank in response to the frame, which ultimately has the great effect of greatly improving the structural stability of the vacuum insulated cryogenic tank. there is.

Figure 1 is an external perspective view of the vacuum insulated cryogenic tank of the present invention.
Figure 2 is a cross-sectional view of the vacuum insulated cryogenic tank of the present invention.
Figures 3 to 5 show the shape deformation process according to pressure transfer in the vacuum insulated cryogenic tank of the present invention.
Figure 6 shows examples of jacket wrinkle formation positions of the vacuum insulated cryogenic tank of the present invention.
Figures 7 and 8 show examples of jacket wrinkles of the vacuum insulated cryogenic tank of the present invention.
Figure 9 is another embodiment of the inner tank of the vacuum insulated cryogenic tank of the present invention.
Figure 10 is a stress reduction design considering shrinkage of the vacuum insulated cryogenic tank of the present invention.
Figures 11 and 12 show examples of the frame of the vacuum insulated cryogenic tank of the present invention.

Hereinafter, the vacuum insulated cryogenic tank according to the present invention having the above-described configuration will be described in detail with reference to the attached drawings.

Figure 1 shows an external perspective view of the vacuum insulated cryogenic tank of the present invention, and Figure 2 shows a cross-sectional view of the vacuum insulated cryogenic tank of the present invention. Referring to Figures 1 and 2, the vacuum insulated cryogenic tank 100 of the present invention includes an inner tank 110, an insulation layer 120, a vacuum jacket 130, jacket pleats 140, and a frame 150. do.

The inner tank 110 is a place where fluid is stored. In particular, in the case of the present invention, liquefied natural gas (LNG) or liquefied hydrogen (LH2) can be a specific example of the fluid stored in the inner tank 110. . In the case of liquefied natural gas and liquefied hydrogen, the boiling point is extremely low at -160/250℃, respectively, and accordingly, pressure increase due to temperature increase can be the most fatal problem. Therefore, in order to stably store such fluid, the inner tank 110 must have high pressure resistance.

The insulating layer 120 surrounds the inner tank 110 and is made of a material capable of insulating. In addition, the vacuum jacket 130 is formed to surround the insulation layer 120, and maintains the inside in a vacuum to maintain airtightness from the outside. As described above, when the fluid stored in the inner tank 110 is liquefied natural gas or liquefied hydrogen, the inner tank 110 must be insulated from the external environment to prevent unnecessary evaporation due to external room temperature. It is obvious that it must be done. By providing the insulation layer 120 and the vacuum jacket 130 together, the inner tank 110 can be effectively insulated from the external environment by the insulation material and vacuum.

The temperature difference is very extreme between the space insulated from each other by the heat insulating layer 120 and the vacuum jacket 130, that is, the external space, and the inner space of the inner tank 110. Therefore, even in a normally stable environment, there is a natural possibility that changes in environmental conditions such as temperature and pressure may occur, and accordingly, there is also a possibility of shape changes occurring. The insulating material forming the insulating layer 120 is generally made of a porous material with a lot of empty space, so it can flexibly respond to changes in shape. Meanwhile, in the vacuum jacket 130, airtightness maintenance performance is considered the most important, and pressure resistance may be relatively low. Therefore, the vacuum jacket 130 may be designed to be formed of a thin plate and include a structure that can flexibly respond to shape changes.

The jacket wrinkles 140 are formed in an uneven shape on the wall of the vacuum jacket 130, and are a structure for responding to shape changes as described above. When a pressure change occurs in the vacuum jacket 130, a change in shape occurs intensively in the jacket wrinkles 140, and thus the remaining parts other than the jacket wrinkles 140 can be operated more stably.

At this time, if the vacuum insulated cryogenic tank 100 is a membrane-type tank, there will be no problem in operation even if the shape of the vacuum jacket 130 changes, that is, contraction or expansion occurs, but as described above, if it is an independent tank, there is a problem. occurs. That is, in the case of an independent tank, it includes a support body that supports the entire tank, and this support body is connected to the inner tank 110, which is the strongest part. Accordingly, the support body inevitably penetrates the insulation material 120 and the vacuum hatch 130. will be placed. As described above, the vacuum jacket 130 inevitably changes shape even in a stable environment, and therefore excessive stress concentration and fatigue accumulation occur at the connection portion between the support and the vacuum jacket 130, which greatly reduces lifespan and durability. It becomes the cause.

The frame 150 is formed to support the outer shape of the vacuum jacket 130, and is intended to solve the problem described above. In the present invention, the vacuum insulated cryogenic tank 100 is deformed by shrinking or expanding the wall of the vacuum jacket 130 according to pressure changes, and the frame 150 is formed to maintain its shape regardless of pressure changes. do. That is, even if a change in shape such as contraction or expansion occurs in the vacuum insulated cryogenic tank 100 itself, the frame 150 portion is formed to maintain its shape fixedly without a change in shape. To be more specific, in the vacuum insulated cryogenic tank 100, the vacuum jacket 130 deforms the wall surface other than the portion fixed and supported by the frame 150 according to pressure changes, and the frame 150 ) The position of the wall surface of the part that is fixedly supported is maintained fixedly. Accordingly, the vacuum insulated cryogenic tank 100 can be used as a membrane-type tank, and by connecting a separate support to the frame 150, the vacuum insulated cryogenic tank 100 can be used as an independent tank, tank Utilization and application areas can be greatly expanded.

As a brief example of the structure described above, if the vacuum jacket 130 is approximately a rectangular parallelepiped as shown in FIGS. 1 and 2, the frame 150 may be formed in the form of a combination of links disposed at each corner of the rectangular parallelepiped. You can. Of course, this is only an example. For example, the vacuum jacket 130 may be formed in a cylindrical shape, in which case the frame 150 is disposed between at least two circular rings and the circular rings spaced apart from each other. It may be formed in a form such as a combination of a plurality of straight columns. In this way, it is sufficient if the frame 150 is designed as a form that forms the framework of the outer shape of the vacuum jacket 130, that is, the frame 150 can generally be formed in a form in which a plurality of links are connected.

Figures 3 to 5 are diagrams for explaining the shape deformation process according to pressure transfer in the vacuum insulated cryogenic tank of the present invention. First, as shown in FIG. 3, in the vacuum insulated cryogenic tank 100, pressure is transmitted in the following order: external environment (atmospheric pressure) → vacuum jacket → insulation layer → inner tank. The inner tank 110, which is located on the innermost side and receives high pressure, requires the most important pressure resistance, and is therefore made of a material with high rigidity. The insulating layer 120 not only fulfills its original role, that is, insulating properties, but also requires significant pressure resistance because it is subjected to considerable pressure. Meanwhile, in the case of the vacuum jacket 130, shape deformation necessarily occurs as described above, but since this shape deformation occurs almost concentrated in the jacket wrinkles 140, (considering the jacket wrinkles 140 separately) The vacuum jacket 130 most importantly requires airtightness. As the jacket folds 140 are part of the vacuum jacket 130, airtightness is of course important, and in addition, pressure resistance is also important to withstand shape deformation.

3 to 5 show the vacuum insulated cryogenic tank 100 when the temperature of the inner tank 110 decreases significantly as cryogenic fluids such as liquefied natural gas and liquefied hydrogen are accommodated in the inner tank 110. The shape change is sequentially shown, and Figure 3 corresponds to the state before the overall shape deformation occurs. Figure 4 is a state in which more time has passed than Figure 3, and as the cryogenic fluid is accommodated in the inner tank 110, the inner tank 110 first shrinks due to a rapid temperature drop, and some of the insulation layer 120 also shrinks. It shows a contracted state. That is, in Figure 4, the vacuum jacket 130 is not yet deformed, and therefore an empty space is formed between the insulation layer 120 and the vacuum jacket 130. In this state, the vacuum jacket 130 is also pressured toward the inner tank 110 by atmospheric pressure, and as a result, the vacuum jacket 130 is finally contracted to the state shown in FIG. 5. At this time, as the overall shape of the vacuum jacket 130 contracts, it must expand somewhere, and the jacket wrinkles 140 are responsible for the expansion. That is, as shown in FIG. 5, the jacket wrinkles 140 were originally the size indicated by the dotted line, but due to contraction of the vacuum jacket 130, they expand to the size indicated by the solid line.

Meanwhile, during this process, as can be seen in FIGS. 3 to 5, no shape deformation occurs in the frame 150. That is, even if environmental changes such as pressure and temperature occur, the shape and position of the frame 150 are maintained fixedly. Accordingly, as described above, it is also possible to use the vacuum insulated cryogenic tank 100 as an independent tank by connecting a support to the frame 150.

Hereinafter, the jacket wrinkles 140 of the vacuum insulated cryogenic tank 100 will be described in more detail with reference to FIGS. 6 to 8.

As described above, the outer surface of the vacuum insulated cryogenic tank 100 includes the vacuum jacket 130 and the frame 150 in the shape of a skeleton that supports the outer shape. At this time, even if the vacuum jacket 130 is deformed due to environmental changes, the frame 150 is not deformed. In addition, the shape deformation of the vacuum jacket 130 occurs concentrated on the jacket wrinkles 140 formed on the vacuum jacket 130.

Considering these matters, it is preferable that the jacket wrinkles 140, which cause a lot of shape deformation, are formed in a shape that does not contact or intersect with the frame 150, which does not cause shape deformation. Specifically, the jacket wrinkles 140, as well shown in FIG. 1, etc., may be formed in the form of a closed curve included in the surface defined by the frame 150 among the walls of the vacuum jacket 130. . Of course, in order to reduce stress concentration at this time, it is preferable that the jacket wrinkles 140 are formed in a circular or oval shape.

Meanwhile, Figures 1 to 5 show an embodiment in which the jacket wrinkles 140 are formed on all of the walls of the vacuum jacket 130 divided by the frame 150, that is, on all surfaces. However, the present invention is not limited by this, and the jacket wrinkles 140 may be formed on some of the walls of the vacuum jacket 130 divided by the frame 150. Figure 6 shows embodiments of the jacket wrinkle formation positions of the vacuum insulated cryogenic tank of the present invention, and as described above, these are embodiments in which the jacket wrinkles 140 are formed only on some surfaces. In the case of the upper view of FIG. 6, the vacuum jacket 130 has a rectangular parallelepiped shape similar to that of FIGS. 1 to 5, but the surface in one direction is relatively very narrow. In this case, it is obvious that shape deformation will occur more actively on the surface with a relatively large area, so the jacket wrinkles 140 are formed only on the surface with a large area and the jacket wrinkles 140 are not formed on the surface with a small area. You can. In the lower view of FIG. 6, the vacuum jacket 130 has a cylindrical side and both upper surfaces are formed in a convex curved shape. In this case, since the curved shape is already a pressure-resistant design shape, the jacket wrinkles 140 are added to the curved portion. There is no need to form it. In other words, to summarize, when the jacket wrinkles 140 are formed on some of the walls of the vacuum jacket 130 divided by the frame 150, the wall on which the jacket wrinkles 140 are not formed is the remaining wall surface. Compared to , it may have a relatively small area or may be formed in a curved shape.

Meanwhile, at least one jacket wrinkle 140 may be formed per wall of the vacuum jacket 130 divided by the frame 150. That is, only one jacket wrinkle 140 may be formed on one side, or a plurality of jacket wrinkles 140 may be formed on one side. When a plurality of jacket pleats 140 are formed on one surface, as shown in embodiments such as FIG. 1, it is preferable that the plurality of jacket pleats 140 are formed in a form that does not contact or intersect each other. do.

Figures 7 and 8 show examples of jacket wrinkles of the vacuum insulated cryogenic tank of the present invention, and show various shapes of the jacket wrinkles 140.

First, the jacket wrinkles 140 may be formed in the form of convexly protruding or concavely recessed grooves on the wall surface of the vacuum jacket 130, as shown in FIG. 7. In addition, when a plurality of wall surfaces of the vacuum jacket 130 are formed on each side divided by the frame 150, they are formed only in a protruding form, only in a recessed form, or in both protruding and recessed forms within one wall. can be formed. In FIG. 7, marking part A shows a case in which all jacket wrinkles are in a protruding form, part B showing a case in which all jacket wrinkles are in a recessed form, and part C showing a case in which both protruding and recessed forms are mixed.

Alternatively, the jacket wrinkles 140 may be formed in such a way that the wall surface of the vacuum jacket 130 protrudes convexly or recesses concavely in a stepwise manner, as shown in FIG. 8 . In Figure 8, the D-marked portion shows a case where it is concavely recessed in a stepwise manner, and the E-marked portion shows a case where it protrudes convexly in a stepwise manner.

Hereinafter, the detailed configuration of each additional part of the vacuum insulated cryogenic tank 100 will be described in more detail.

Figure 9 shows another embodiment of the inner tank of the vacuum insulated cryogenic tank of the present invention. In the previous drawings, the inner tank 110 is shown as an embodiment in which the inner tank 110 is formed in a shape close to a rectangular parallelepiped. However, the shape of the inner tank 110 can be changed in various ways as long as it has sufficient pressure resistance performance. Figure 9 shows an embodiment in which the inner tank 110 has a spherical shape.

Figure 10 is for explaining the stress reduction design considering shrinkage of the vacuum insulated cryogenic tank of the present invention. To explain it more easily, it is as follows. As described above, the vacuum insulated cryogenic tank 100 of the present invention is ultimately intended to stably store cryogenic fluids such as liquefied natural gas or liquefied hydrogen. That is, the normal operating environment of the vacuum insulated cryogenic tank 100 can be considered to be a cryogenic state. Meanwhile, the manufacturing environment of the vacuum insulated cryogenic tank 100 is naturally at normal room temperature. Therefore, when the pre-designed shape and volume are formed in a manufacturing environment, the vacuum insulated cryogenic tank 100 is inevitably in a contracted state in an actual operating environment. In other words, not only is it unable to actually form the pre-designed shape and volume in the operating environment, but also the stress is formed to be quite high as it contracts. At this time, as shown in Figure 10, when it is expanded to form a larger shape than the previously designed shape and volume in the manufacturing environment, that is, atmospheric pressure and room temperature, the vacuum insulated cryogenic tank 100 contracts in the operating environment, that is, vacuum low temperature state. As a result, it becomes possible to correctly form the previously designed shape and volume. Of course, as a result, the outer surface forms a flat surface as shown in FIGS. 1 to 9 in the operating environment, that is, in a vacuum and low temperature state, so that the effect of reducing the stress in normal times can be obtained.

Figures 11 and 12 show examples of the frame of the vacuum insulated cryogenic tank of the present invention. It was previously explained that the frame 150 can be formed in a form in which a plurality of links are connected. At this time, if the connection part of the links is formed in a sharp shape, there is a risk that stress will be concentrated and damage will occur in that part. Therefore, as shown in the F mark in FIG. 11, the connection part of the links is formed in a curved shape. It is desirable. In addition, the frame 150 is connected to the wall of the vacuum jacket 130 by welding, and it is necessary to relieve stress concentration at this connection. Accordingly, as shown in FIG. 12, it is preferable that the portion of the frame 150 connected to the vacuum jacket 130 forms frame wings 155 having a relatively thin thickness.

The present invention is not limited to the above-described embodiments, and its scope of application is diverse, and anyone skilled in the art can understand it without departing from the gist of the invention as claimed in the claims. Of course, various modifications are possible.

100: Vacuum insulated cryogenic tank
110: inner tank 120: insulation layer
130: Vacuum jacket 140: Jacket wrinkles
150: Frame 155: Frame wings

Claims (18)

An inner tank (110) in which fluid is stored;
An insulating layer 120 surrounding the inner tank 110 and made of a material capable of insulating;
A vacuum jacket 130 formed to surround the insulation layer 120 and maintains airtightness from the outside by maintaining a vacuum inside;
Jacket wrinkles 140 formed in an uneven shape on the wall of the vacuum jacket 130;
A frame 150 formed to support the outer shape of the vacuum jacket 130;
Including,
The vacuum jacket 130 is deformed by shrinking or expanding the wall according to pressure changes, but the frame 150 is formed to maintain its shape regardless of pressure changes,
The jacket wrinkles 140 do not contact or intersect the frame 150, and are formed in the form of a closed curve included in a surface defined by the frame 150 among the walls of the vacuum jacket 130,
The jacket wrinkles 140 are formed on some of the walls of the vacuum jacket 130 divided by the frame 150, and the wall on which the jacket wrinkles 140 are not formed is relatively small compared to the remaining walls. A vacuum insulated cryogenic tank characterized in that it has a narrow area or is formed in a curved shape.
delete According to clause 1,
The wall surface of the vacuum jacket 130 other than the part fixed and supported by the frame 150 is deformed according to pressure changes, and the wall surface of the part fixed and supported by the frame 150 is formed to maintain a fixed position. A vacuum insulated cryogenic tank characterized by being.
delete delete The method of claim 1, wherein the jacket wrinkles (140) are:
A vacuum insulated cryogenic tank characterized in that it is formed in a circle or oval shape.
delete The method of claim 1, wherein the jacket wrinkles (140) are:
A vacuum insulated cryogenic tank, characterized in that at least one wall of the vacuum jacket 130 is formed on each side divided by the frame 150.
The method of claim 8, wherein the jacket wrinkles (140) are:
A vacuum insulated cryogenic tank, characterized in that when a plurality of wall surfaces of the vacuum jacket 130 are formed on each side divided by the frame 150, they are formed in a form that does not contact or intersect each other.
The method of claim 8, wherein the jacket wrinkles (140) are:
A vacuum insulated cryogenic tank, characterized in that it is formed in the form of a convexly protruding or concavely recessed groove on the wall of the vacuum jacket 130.
The method of claim 10, wherein the jacket wrinkles (140) are:
When a plurality of wall surfaces of the vacuum jacket 130 are formed on each side divided by the frame 150, they are formed only in a protruding form, only in a recessed form, or both in a protruding form and in a recessed form within one wall. A vacuum insulated cryogenic tank characterized by being.
The method of claim 8, wherein the jacket wrinkles (140) are:
A vacuum insulated cryogenic tank, characterized in that the wall surface of the vacuum jacket 130 is formed in a stepwise convex protrusion or concave depression.
delete The method of claim 1, wherein the vacuum jacket 130 is:
To form a pre-designed shape and volume in the operating environment,
A vacuum insulated cryogenic tank characterized in that it expands and forms a larger shape than the previously designed shape and volume at atmospheric pressure and room temperature.
The method of claim 1, wherein the frame 150 is:
A vacuum insulated cryogenic tank characterized in that it is formed in a form in which a plurality of links are connected.
The method of claim 15, wherein the frame 150 is:
A vacuum insulated cryogenic tank, characterized in that the connecting portion of the links is formed in a curved shape.
The method of claim 1, wherein the frame 150 is:
A vacuum insulated cryogenic tank, characterized in that it is connected to the wall of the vacuum jacket 130 by welding.
The method of claim 17, wherein the frame 150 is:
A vacuum insulated cryogenic tank, characterized in that the portion connected to the vacuum jacket 130 forms frame wings 155 having a relatively thin thickness.

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