KR20230142949A - Standard transportation container minimizing vaporization of liquid hydrogen stored in vessel - Google Patents

Abstract

The present invention relates to a standard container capable of storing and transporting a liquefied hydrogen container. By forming a cryogenic liquid helium pipe on the surface of the liquefied hydrogen storage container, it is possible to store the liquefied hydrogen container for a long time, and the liquefied hydrogen container can be stored for a long time. It relates to a standard transport container for liquid hydrogen that can minimize vaporization of liquid hydrogen that can be supplied to long-distance points. The standard transport container for liquefied hydrogen that can minimize vaporization of liquefied hydrogen according to the present invention includes a container housing, a liquefied hydrogen storage container in which liquefied hydrogen is stored, and an outer surface of the liquefied hydrogen storage container. It is formed around the liquid helium pipe, which prevents liquid helium from flowing through the internal space and evaporating the liquid hydrogen, and is connected to one end and the other end of the liquid helium pipe, respectively, and is connected to the inside of the liquid helium pipe through one end of the liquid helium pipe. It includes a liquid helium supply device that supplies the liquid helium to and recovers the liquid helium through the other end of the liquid helium pipe.

Description

Standard transport container for liquefied hydrogen that can minimize vaporization of liquefied hydrogen {STANDARD TRANSPORTATION CONTAINER MINIMIZING VAPORIZATION OF LIQUID HYDROGEN STORED IN VESSEL}

The present invention relates to a standard container that can store and transport a liquefied hydrogen container. More specifically, it is possible to store the liquefied hydrogen container for a long time by forming a cryogenic liquid helium pipe on the surface of the liquefied hydrogen storage container. It relates to a standard transport container for liquid hydrogen containers that is capable of minimizing vaporization of liquid hydrogen and capable of supplying liquid hydrogen to long-distance points.

Efforts to reduce carbon gas emissions are actively underway around the world to solve the global warming climate problem. Hydrogen fuel is the most suitable alternative to fossil fuels that generate carbon gas, so the industry for manufacturing, storing and transporting hydrogen, and producing electric energy using fuel cells is rapidly expanding. However, the methods and related technologies for transporting hydrogen from places where hydrogen is produced to large cities or industrial complexes that consume large amounts of hydrogen fuel are still lacking, so the development of new technologies for this is urgently needed. Liquefied hydrogen has a higher energy density per unit weight than high-pressure hydrogen, making it suitable as a pollution-free fuel for hydrogen cars, drones, ships, and hydrogen power plants. Meanwhile, vaporization loss can be reduced by maintaining the cryogenic state of liquefied hydrogen, but technical preparations for containers and storage containers for maintaining cryogenic temperatures are not yet sufficient.

The most important technical issue in the development of a mobility vehicle using liquefied hydrogen as fuel is the development of a fuel tank that can efficiently store liquefied hydrogen in a cryogenic state and extract hydrogen in gaseous form when necessary. That is. Since liquefied hydrogen is maintained as a cryogenic liquid below 20°K (-253°C) at normal pressure, the development of insulation technology that can minimize vaporization loss due to heat inflow from the outside must be developed first. To insulate storage containers, various methods such as vacuum insulation, multi-layer insulation (MLI), and vapor-cooled radiation shield are currently being used in combination. These methods are used to insulate storage containers. It is known to be able to block conduction, convection, and radiation caused by air quite effectively. However, in a fuel tank that actually stores liquid hydrogen, it is essential to install a filling tube, withdrawal tube, and support for charging and extracting hydrogen fuel, and conduction heat inflow through these parts is essential. Because it is so large, the problem of greatly reducing the storage efficiency of the liquefied hydrogen fuel tank must be solved.

Republic of Korea Patent Publication No. 10-2335822 (announced on December 7, 2021)

The purpose of the present invention is to form a cryogenic liquid helium pipe on the surface of the liquefied hydrogen storage container, so that the liquefied hydrogen container can be stored for a long time and the vaporization of the liquefied hydrogen can be minimized to supply the liquefied hydrogen to a long distance point. Containers are intended to provide standard transport containers.

Another object of the present invention is to provide a standard transport container for liquefied hydrogen that can store a single or multiple liquefied hydrogen storage containers for a long time and minimize vaporization of liquefied hydrogen, which can supply liquefied hydrogen to a long distance point.

Another object of the present invention is to provide a standard transport container for liquefied hydrogen that can minimize vaporization of liquefied hydrogen and enable real-time monitoring of the liquefied hydrogen storage container included in the container by applying remote communication technology.

In order to achieve the above-described object, a standard transport container for liquefied hydrogen capable of minimizing vaporization of liquefied hydrogen according to an embodiment of the present invention includes a container housing, the container housing, and contains liquefied hydrogen (liquid hydrogen) therein. ), a liquid helium storage container in which liquid hydrogen is stored, a liquid helium pipe formed around the outer surface of the liquid hydrogen storage container and preventing liquid helium from flowing through the internal space and evaporating the liquid hydrogen, and a liquid helium pipe of the liquid helium pipe. It is connected to one end and the other end, respectively, and includes a liquid helium supply device that supplies the liquid helium into the liquid helium pipe through one end of the liquid helium pipe and recovers the liquid helium through the other end of the liquid helium pipe. , the container housing includes an insulating partition that separates an insulating space in which the liquefied hydrogen storage container is located and an apparatus space in which the liquid helium supply device is located inside the container housing.

The container housing includes a container frame and an insulating wall that is coupled to the outside of the container frame to form an outer wall of the container housing, and the insulating wall is located on the upper, lower, left, right, and front sides of the container frame, respectively. It is coupled to the upper surface, lower surface, left surface, right surface, front and rear of the container frame, and includes a door surface that opens and closes the interior of the container housing, and the insulation wall and the insulation partition are each located on the outside, A foam core member whose outer surface is made of a steel plate and which includes a foam core layer containing vacuum glass beads inside, and which is located inside the foam core member, whose outer surface is made of stainless steel and which contains a vacuum layer inside. Includes multi-layer insulation.

Inside the insulating space, a plurality of mounting plates are formed so as to be in contact with the outer surface of the liquefied hydrogen storage container and on which the liquefied hydrogen storage container is mounted, and on the lower surface of the upper surface, the upper part of the liquefied hydrogen storage container is directed downward. Including a container fixing device that is pressed and fixed to prevent shaking of the liquefied hydrogen storage container.

The container housing detects leakage of hydrogen gas in which the liquefied hydrogen has been vaporized in the liquefied hydrogen storage container, and has a pressure sensor that detects pressure changes in the liquefied hydrogen storage container and the temperature of the liquefied hydrogen stored in the liquefied hydrogen storage container. It further includes a temperature sensor that detects a leak of hydrogen gas detected by the pressure sensor, a change in pressure within the liquefied hydrogen storage container, or a temperature of liquefied hydrogen detected by the temperature sensor through a communication network inside the device space. A communication device that transmits to an external server is further included, enabling remote monitoring of liquefied hydrogen.

The inside of the insulating space further includes an insulating material that fills the space between the outer surface of the liquefied hydrogen storage container and the inner surface of the container housing, and the insulating material includes foam containing vacuum glass beads therein.

According to the present invention, a standard transport container for liquefied hydrogen that can minimize vaporization of liquefied hydrogen, it is possible to store the liquefied hydrogen container for a long time by forming a cryogenic liquid helium pipe on the surface of the liquefied hydrogen storage container and transport the liquefied hydrogen to a long distance point. There is an effect that can be provided.

According to the present invention, a standard transport container for liquefied hydrogen that can minimize vaporization of liquefied hydrogen, it is possible to supply liquefied hydrogen to a long distance by storing a single or multiple liquefied hydrogen storage containers for a long time.

According to the present invention, a standard transport container for liquefied hydrogen that can minimize vaporization of liquefied hydrogen, real-time monitoring of the liquefied hydrogen storage container included in the container is possible by applying remote communication technology.

1 is a diagram showing a container housing according to the present invention.
Figure 2 is a diagram showing a container frame according to the present invention.
Figure 3 is a schematic diagram showing the opened door of a container housing containing a liquefied hydrogen storage container according to the present invention.
Figure 4 is a view showing the interior of the container housing according to the present invention as seen toward one side.
FIG. 5 is a cross-sectional view showing a cross section taken along line A-A' of FIG. 4.
Figure 6 is a diagram showing the insulation wall according to the present invention in detail.
Figure 7 is a view showing a container including a small liquefied hydrogen storage container according to an embodiment of the present invention.
Figure 8 is a view showing the door surface of a container containing a small liquefied hydrogen storage container according to an embodiment of the present invention with an open state.
Figure 9 is a view showing a container including a medium-sized liquefied hydrogen storage container according to another embodiment of the present invention.
Figure 10 is a view showing the inside of the container housing looking toward one side to show the liquid helium tube according to another embodiment of the present invention.
Figure 11 is a block diagram briefly showing the appearance of a liquid helium tube according to another embodiment of the present invention.
Figure 12 is a view showing the inside of the container housing looking toward one side to show the liquid helium tube according to another embodiment of the present invention.
Figure 13 is a block diagram briefly showing the appearance of a liquid helium tube according to another embodiment of the present invention.
Figure 12 is a view showing the inside of the container housing looking toward one side to show the liquid helium tube according to another embodiment of the present invention.
Figure 13 is a block diagram briefly showing the appearance of a liquid helium tube according to another embodiment of the present invention.
Figure 14 is a diagram showing a mass flow controller according to the present invention.
FIG. 15 is a diagram simply showing the mass flow controller of FIG. 14.
Figure 16 is another embodiment of a mass flow controller according to the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through illustrative drawings. When adding reference signs to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible even if they are shown in different drawings.

Also, in describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

Additionally, when describing the components of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term.

In this specification, singular forms also include plural forms unless specifically stated in the phrase. As used in the specification, “comprises” and/or “including” does not exclude the presence or addition of one or more other components in addition to the mentioned components.

Hereinafter, the present invention will be described in more detail with reference to the attached drawings.

Figure 1 is a diagram showing a container housing 100 according to the present invention, and Figure 2 is a diagram showing a container frame 110 according to the invention.

Referring to FIG. 1, the liquefied hydrogen container standard transport container 1000 (hereinafter referred to as 'container' and reference numerals omitted) capable of minimizing vaporization of liquefied hydrogen according to the present invention is installed on a ship or container transport vehicle. It can be a standard container of 6 m (20 ft) or 12 m (40 ft) in length. The container includes a container housing 100 forming an outer wall. Referring to FIG. 2, the container housing 100 includes a container frame 110 forming an internal framework. Referring again to FIG. 1, the container housing 100 is coupled to the outside of the container frame 110 to form the container housing 100. ) includes the insulating wall that forms the outer wall. At this time, the insulation wall may be a sandwich panel that forms the outer wall of the container.

The insulation wall according to the present invention includes an upper surface 111 coupled to the upper side of the container frame 110, a lower surface 112 coupled to the lower side of the container frame 110, and a seat surface coupled to the left side of the container frame 110. 113), a right surface 114 coupled to the right side of the container frame 110, a front surface coupled to the front of the container frame 110, and a door surface 115 coupled to the rear of the container frame 110. The door surface 115 can open and close the interior of the container housing 100, and is located at the rear of the vehicle when loaded on the vehicle. Therefore, the front coupled to the front of the container frame 110 is positioned toward the driver's seat of the vehicle when loaded on the vehicle. Meanwhile, in Figure 1, the front view is omitted for convenience.

Figure 3 is a diagram briefly showing the door surface 115 of the container housing 100 containing the liquefied hydrogen storage container 200 according to the present invention opened.

Referring to FIG. 3, the container according to the present invention includes a liquefied hydrogen storage container 200 included in the container housing 100. Liquid hydrogen is stored inside the liquid hydrogen storage container 200. A liquefied hydrogen inlet and outlet (273, see FIG. 4) for storing or discharging liquefied hydrogen is formed at the front of the liquefied hydrogen storage container 200.

Liquid helium pipes 201, 203, 205, and 207 through which cryogenic liquid helium flows along the internal space are formed on the outer surface of the liquefied hydrogen storage container 200 according to the present invention. Liquid helium pipes (201, 203, 205, 207) may be formed surrounding the outer surface of the liquid hydrogen storage container (200). In one embodiment, the liquid helium tubes 201, 203, 205, and 207 may be in a ‘U’ shape lying on its side. One end and the other end of the 'U' shaped liquid helium pipes (201, 203, 205, 207) lying on their sides are formed toward the front of the container housing (100), and the liquid helium pipes (201, 203) are directed from one end to the other end. , 205, 207), that is, the midpoint of the curved portion may be formed toward the door surface 115 of the container housing 100. One end and the other end of the liquid helium pipes 201, 203, 205, and 207 are connected to a liquid helium supply device 220, which will be described later with reference to FIG. 4. Meanwhile, in the drawing, for convenience of illustration, one end and the other end of the liquid helium pipes 201, 203, 205, and 207 are not shown connected to the liquid helium supply device 220.

A plurality of liquid helium pipes (201, 203, 205, 207) may be formed on the outer surface of the liquefied hydrogen storage container 200. In one embodiment, they may be formed radially around the liquefied hydrogen inlet and outlet 273. . Cryogenic liquid helium flowing through the liquid helium pipes (201, 203, 205, 207) actively suppresses the temperature rise within the liquid hydrogen storage container (200), thereby vaporizing the liquid hydrogen stored inside the liquid hydrogen storage container (200). prevent it from happening. In order to prevent vaporization loss of liquefied hydrogen due to an increase in the temperature of the liquefied hydrogen storage container 200, the internal temperature of the container, specifically the insulation space 120, which will be described in detail later, must be maintained at -253°C or lower.

Meanwhile, inside the container housing 100, the empty space between the liquefied hydrogen storage container 200 and the container housing 100 may be filled with an insulating material 210. At this time, a foam-type insulation material 210 containing vacuum glass beads (glass bubbles) inside may be used.

The insulation material 210 included inside the container housing 100, together with the insulation wall, blocks heat flowing in from the outside and can prevent the liquid hydrogen stored in the liquid hydrogen storage container 200 from vaporizing, thereby maintaining the liquid hydrogen for a long time. Can be stored and transported.

Meanwhile, vacuum glass beads were developed for heat dissipation purposes to protect spacecraft from frictional heat generated when the spacecraft enters the atmosphere. They are formed in the form of beads that have an excellent heat dissipation effect and have an empty internal space, so their specific gravity is very low. Vacuum glass beads are a material with a fine sphere shape, very low specific gravity, very low thermal conductivity, and sound absorption and insulation properties.

Figure 4 is a view showing the interior of the container housing 100 according to the present invention as seen toward one side.

One end and the other end of each of the plurality of liquid helium pipes (201, 203, 205, 207) according to the present invention may be connected to the liquid helium supply device (220). The liquid helium supply device 220 supplies cryogenic liquid helium, in one embodiment, into the liquid helium pipes (201, 203, 205, 207) through one end of the connected liquid helium pipes (201, 203, 205, 207). Liquid helium at 268°C is supplied, and liquid helium is recovered through the other end of the liquid helium pipes (201, 203, 205, and 207).

Referring to FIG. 4, the interior of the container housing 100 according to the present invention includes an insulating space 120 where the liquefied hydrogen storage container 200 is located and a device space 130 where the liquid helium supply device 220 is located. Includes. The insulation space 120 and the device space 130 are separated by an insulation partition 117. The insulation partition 117 prevents heat generated in the device space 130 from flowing into the insulation space 120. A detailed description of the insulating partition 117 will be provided later.

The liquefied hydrogen storage container 200 according to the present invention connects the inside and the outside of the liquefied hydrogen storage container 200 in the direction toward the door surface 115, that is, on the left side as shown in Figure 4, so that liquefied hydrogen is stored and discharged. It includes a liquefied hydrogen inlet and outlet 273 and a sensor unit 271 that measures the pressure and temperature within the liquefied hydrogen storage container 200. The sensor unit 271 includes a pressure sensor and a temperature sensor. The pressure sensor may detect a leak of hydrogen gas in which the liquefied hydrogen has been vaporized in the liquefied hydrogen storage container 200 or detect a change in pressure within the liquefied hydrogen storage container 200. The temperature sensor can detect the temperature of liquefied hydrogen stored in the liquefied hydrogen storage container 200.

Meanwhile, when the temperature of the liquefied hydrogen storage container 200 increases (112), the liquefied hydrogen is vaporized to become hydrogen gas, and the pressure inside the liquefied hydrogen storage container 200 increases. At this time, in order to prevent the explosion of the liquefied hydrogen storage container 200, the vaporized hydrogen must be released.

The liquefied hydrogen storage container 200 further includes a vaporized hydrogen recovery pipe 261 through which the hydrogen gas is injected and moved when the liquefied hydrogen is vaporized to generate hydrogen gas. Hydrogen gas moving through the vaporized hydrogen recovery pipe 261 is pressurized and stored in the vaporized hydrogen recovery device 260 included in the device space 130. Hydrogen gas stored in the vaporized hydrogen recovery device 260 can be supplied to the fuel cell and battery device 250 included in the device space 130 to generate electricity, and the generated power is stored to supply liquid helium when necessary. It can be used as power for the device 220 or the vacuum pump device 240, which will be described later.

The device space 130 according to the present invention further includes a vacuum pump device 240. The vacuum pump device 240 maintains the vacuum layer of the insulation wall or the insulation partition 117, which will be described later, in a vacuum state.

The device space 130 according to the present invention further includes a communication device 230. The communication device 230 transmits the information detected by the sensor unit 271 to an external server through a communication network. As described above, the information detected by the sensor unit 271 includes a leak of hydrogen gas detected by the pressure sensor, a change in pressure within the liquefied hydrogen storage container 200, and the temperature of liquefied hydrogen detected by the temperature sensor. The container according to the present invention enables remote monitoring of liquefied hydrogen by an external control center or manager through a communication device 230 that communicates with an external server.

Figure 5 is a cross-sectional view showing a cross-section taken along line A-A' in Figure 4.

When a container is loaded and transported on a ship or vehicle, if the liquefied hydrogen sloshes around in the liquefied hydrogen storage container 200 due to shock during transportation, etc., the liquefied hydrogen may be vaporized as the temperature inside the liquefied hydrogen storage container 200 rises. Possible problems arise. Therefore, the mounting plate 209 and the container fixing device 211 according to the present invention can minimize the above-mentioned sloshing.

Referring to FIG. 5 , a plurality of mounting plates 209 are formed inside the insulating space 120 according to the present invention. The mounting plate 209 is formed at a position in contact with the outer surface of the liquefied hydrogen storage container 200. A liquefied hydrogen storage container 200 is mounted on one side of the mounting plate 209.

The inside of the insulation space 120 according to the present invention, specifically the lower surface of the upper surface 111 forming the container housing 100, is a container fixing device ( 211).

Therefore, while the liquefied hydrogen storage container 200 is mounted on the lower mounting plate 209, the container fixing device 211 presses and fixes the upper part of the liquefied hydrogen storage container 200 in the downward direction, thereby causing liquefaction that occurs during movement of the container. It is possible to prevent shaking of the hydrogen storage container 200. Meanwhile, the plurality of mounting plates 209 include a lower mounting plate 209 and an upper mounting plate 209 depending on the positions at which they are formed.

Figure 6 is a diagram showing the insulation wall according to the present invention in detail.

Referring to FIG. 6, the insulation wall according to the present invention, that is, the top, bottom, seat, right, front, and door surfaces, includes a foam core member 121 and a multilayer insulation material 123 to improve insulation performance.

The foam core member 121 is located outside the multilayer insulation material 123 and forms the outer surface of the container housing 100. The interior of the foam core member 121 is made of a foam core layer containing vacuum glass beads. The outer surface of the foam core member 121 is made of steel sheet.

A multilayer insulation material 123 is located inside the foam core member 121. Multi-Layer Insulation (123, MLI, Multi-Layer Insulation) is an insulation material composed of several layers of thin sheets. Multilayer insulation 123 is also used in other fields such as medicine, in space satellites, launch vehicles, and MRI (magnetic resonance imaging) scanners. In space, multilayer insulation 123 protects satellites and rockets from extreme cold and heat of up to 1800 K. The interior of the multilayer insulation material 123 according to the present invention includes a vacuum layer. The vacuum layer is connected to the vacuum pump device 240 described above through a separate pipe (not shown) to maintain a vacuum state. The outer surface of the multilayer insulation material 123 is made of stainless steel, which is resistant to low-temperature brittleness.

Meanwhile, the above-described insulating partition 117 is also made of a foam core member 121 and a multilayer insulating material 123, like the insulating wall.

Figure 7 is a view showing a container including a small liquefied hydrogen storage container 200 according to an embodiment of the present invention, and Figure 8 is a view showing a container including a small liquefied hydrogen storage container 200 according to an embodiment of the present invention. This is a view showing the door surface 115 of the container open, and Figure 9 is a view showing a container including a medium-sized liquefied hydrogen storage container 200 according to another embodiment of the present invention.

Referring to FIG. 7, the container according to the present invention can be manufactured to include nine small liquefied hydrogen storage containers (200). At this time, the interior of the container may have a 3 x 3 lattice structure shape 140 made of stainless steel plate. Nine small liquefied hydrogen storage containers 200 are located in the above-described insulating space 120, so that nine insulating spaces 120 are formed independently. That is, each of the above-described components formed on the outer surface of the small liquefied hydrogen storage container 200 is formed independently. On the other hand, each component located in the device space 130 is formed as a single component. That is, one liquid helium supply device 220 included in the device space 130 is one end and the other of the liquid helium pipes 201, 203, 205, and 207 formed on the outer surface of the plurality of small liquefied hydrogen storage containers 200. Each stage is connected to supply liquid helium.

At this time, referring to FIG. 8, the door surface 115 of the container containing a plurality of small liquefied hydrogen storage containers 200 is provided with a separate independent door 150 for each small liquefied hydrogen storage container 200. do. This is to avoid having an effect such as a temperature increase on other small liquefied hydrogen storage containers 200 when filling each small liquefied hydrogen storage container 200 with liquefied hydrogen or inserting the small liquefied hydrogen storage container 200 into the container. It is for this purpose.

Additionally, referring to FIG. 9, the container according to the present invention may be manufactured to include four medium-sized liquefied hydrogen storage containers 200. At this time, the inside of the container may have a 2 x 2 lattice structure shape 140 made of stainless steel plate. Each feature of the container including the medium-sized liquefied hydrogen storage container 200 is the same as that of the container including the small liquefied hydrogen storage container 200 described above.

Figure 10 is a view showing the inside of the container housing 100 looking toward one side to show the liquid helium tubes 201, 203, 205, and 207 according to another embodiment of the present invention. Figure 11 is a block diagram briefly showing the appearance of liquid helium pipes (201, 203, 205, and 207) according to another embodiment of the present invention.

As described above, the liquid helium tubes (201, 203, 205, 207) according to the present invention are formed around the outer surface of the liquid hydrogen storage container (200) in a 'U' shape lying on its side. A plurality of liquid helium pipes (201, 203, 205, 207) are provided, and each liquid helium pipe (201, 203, 205, 207) is independently connected at one end and the other end to the liquid helium supply device 220 to supply liquid helium. is supplied to prevent the liquid hydrogen in the liquid hydrogen storage container (200) from vaporizing.

Referring to Figures 10 and 11, the liquid helium tubes (201, 203, 205, 207) according to another embodiment of the present invention connect a plurality of liquid helium tubes (201, 203, 205, 207) to each other. It further includes a liquid helium connector (1100). At this time, a split temperature sensor (not shown) that detects the temperature within the liquid hydrogen storage container 200 may be further included at a point where each liquid helium pipe (201, 203, 205, 207) is divided at a certain length. The split temperature sensor detects the temperature of liquefied hydrogen at a plurality of points within the liquefied hydrogen storage container 200. At this time, when a temperature change of liquefied hydrogen is detected at a point adjacent to a specific liquid helium pipe (201, 203, 205, 207), preferably, when a temperature rise is detected, the liquid helium pipe (201, 203, 205, Liquid helium is supplied from other liquid helium pipes (201, 203, 205, 207) adjacent to 207), so that the point where the temperature change of liquefied hydrogen is detected can be quickly cooled.

The liquid helium connector 1100 includes a mass flow controller (1101, mass flow meter, mass flow controller, MFC, Mass Flow Controller). The mass flow controller 1101 measures and controls the flow rate. The mass flow controller 1101 is a device that precisely and accurately controls fluid and gas to flow at the flow rate desired by the user. Most of the mass flow controllers (1101) are capable of directly measuring flow rate without modifying pressure or temperature, are capable of high-level electrical output, have high sensitivity to detect small flow rate changes, and have small pressure loss. It uses a heat conduction type (heat transfer type) sensor that has the advantage of being applicable to a wide pressure range.

The mass flow controller 1101 according to the present invention is capable of supplying liquid helium from one liquid helium pipe (201, 203, 205, 207) to another liquid helium pipe (201, 203, 205, 207), and uses a split temperature sensor. The flow rate of liquid helium is controlled and supplied to the liquid helium pipes (201, 203, 205, 207) in which the temperature change is detected. Meanwhile, the liquid helium pipes (201, 203, 205, 207) or the liquid helium connector 1100 include a regulator (not shown) that controls the pressure of liquid helium, and a liquid helium pressure gauge (not shown) that measures the pressure of liquid helium. ), a filter (not shown) that filters out impurities in the supplied liquid helium, and various valves (not shown) may be further included.

Meanwhile, the temperature change within the liquefied hydrogen storage container 200 is an important part connected to the vaporization of liquefied hydrogen, and therefore, in this specification, the problem is not in the single mass flow controller 1101 but in any one mass flow controller (1101, 1201). When occurs, other mass flow controllers (1101, 1201) operate to open the liquid helium connectors (1100, 1200) that can suppress temperature changes within the liquefied hydrogen storage container (200) as much as possible.

Figure 12 is a view showing the inside of the container housing 100 looking toward one side to show the liquid helium tubes 201, 203, 205, and 207 according to another embodiment of the present invention. , Figure 13 is a block diagram briefly showing the appearance of liquid helium pipes (201, 203, 205, 207) according to another embodiment of the present invention, and Figure 14 is a diagram showing a mass flow controller according to the present invention, FIG. 15 is a diagram simply showing the mass flow controller of FIG. 14.

Meanwhile, FIGS. 10 and 11 show that the liquid helium connector 1100 includes a single mass flow controller 1101, and FIGS. 12 and 13 illustrate that the liquid helium connector 1100 and 1200 include two It is shown including mass flow controllers 1101 and 1201.

Hereinafter, the first mass flow controller 1101 of FIGS. 10 and 11 will be described with reference to FIGS. 12 and 13, and the respective configurations of the first mass flow controller 1101 and the second mass flow controller 1201 are different from each other. same. In this specification, those not shown in the drawings among the configurations of the second liquid helium connector 1200 can be understood by replacing each configuration of the first liquid helium connector 1100. This is also the case for drawing symbols. For example, the second control circuit part not shown in the drawing is replaced with the reference number of the first control circuit part 1120.

Referring to FIGS. 12 to 15, the first mass flow controller 1101 includes a first main line 1110, a first sensor line 1111, a first bypass line 1113, and a first control circuit unit 1120. ) and a first control valve 1104.

The first main line 1110 may be a pipe through which liquid helium is supplied from one of the liquid helium pipes 201, 203, 205, and 207. At this time, the flow of liquid helium is in the direction A shown in FIG. 15.

The first sensor line 1111 allows liquid helium to flow through a circular tube made of metal. At this time, the direction of flowing liquid helium is the same as direction B shown in FIG. 15. When a first sensing coil (1115) is wound on the upstream and downstream sides of this tube and a voltage is applied (112), it is heated by a self-heating resistor and liquid helium flows into the tube, following the flow of liquid helium. Temperature changes occur on both sides of the sensing coil. When liquid helium does not flow and when it flows, a temperature difference occurs, and the first sensing coil 1115 of the first sensor line 1111 outputs the changed value, that is, the temperature difference, to the first control circuit unit 1120. Therefore, the actual flow rate of liquid helium flowing through the first mass flow controller 1101 can be measured.

The first bypass line 1113 includes a first bypass 1114. The first bypass 1114 is for measuring a flow rate higher than the flow rate flowing through the first sensor line 1111. The first bypass 1114 serves to distribute the flow of liquid helium through a separate line connected in parallel with the first sensor line 1111. At this time, the direction of flowing liquid helium is the same as C shown in FIG. 15.

The first control valve 1104 serves to control the flow rate by the first control circuit unit 1120.

The first control circuit unit 1120 controls the first control valve 1104 by calculating the input setting value and the detection value detected from the first sensor line 1111.

The first control circuit unit 1120 compares the mass flow rate detected based on the pre-entered setting value and the value of the temperature difference due to the flow input from the first sensor line 1111, and compares the input setting value with the current mass flow rate. The first control valve 1104 is controlled to reduce or increase the flow rate based on the comparison results. Alternatively, when a change in temperature at a specific point of the liquefied hydrogen storage container 200 described above is detected, the first control valve 1104 can be controlled to increase the flow rate until the temperature at the specific point decreases. The same applies below.

The operation process of the first mass flow controller 1101 configured as described above is explained as follows. When liquid helium flows into the first mass flow controller 1101, the flow is separated before flowing into the first bypass 1114 and passes directly through the first sensor line 1111. In , the temperature change on both sides of the first sensing coil 1115 is detected according to the flow of liquid helium flowing through the tube, and then the value of the temperature difference is output to the connected first control circuit 1120. Then, the first control circuit unit 1120 detects the current mass flow rate based on the temperature difference value input from the first sensor line 1111, compares the detected mass flow rate with the changed temperature value at a specific point, and operates the first control valve. Controls the opening and closing of (1104).

If the detected mass flow rate is smaller than the input value preset by the user within a certain range, or if the temperature at the point where the temperature change of liquefied hydrogen is detected does not decrease, the first control valve 1104 is controlled to be opened further. , by controlling the first control valve 1104 to close when the detected mass flow rate is within a certain range greater than the setting value pre-entered by the user or when the temperature at the point where the temperature change of liquefied hydrogen is detected is lowered, 1 The flow of liquid helium flowing through the bypass 1114 is adjusted so that the desired amount of liquid helium is output.

When liquid helium flows into the first mass flow controller 1101, the flow of liquid helium is separated before flowing into the first bypass 1114 and passes directly through the first sensor line 1111. The first sensor line 1111 measures the mass flow rate and outputs the measured value to the first control circuit 1120. The first control circuit 1120 uses the previously input set value or changed temperature value and the first sensor line 1111 to measure the mass flow rate. The opening and closing of the first control valve 1104 is controlled by comparing the value detected at 1111. By controlling the opening and closing of the first control valve 1104, the flow of liquid helium flowing into the first bypass 1114 can be adjusted to allow a desired amount of liquid helium to flow into the storage tank 30.

The liquid helium pipes (201, 203, 205, 207) have liquid helium connectors (1100, 1200) that measure and adjust the flow rate of liquid helium supplied from other liquid helium pipes (201, 203, 205, 207). Includes. A plurality of liquid helium connectors (1100, 1200) may be included. For example, if two liquid helium connectors (1100, 1200) are included, they are called the first liquid helium connector (1100) and the second liquid helium connector, respectively. It is called a helium connector (1200).

The first liquid helium connector 1100 and the second liquid helium connector 1200 each measure the flow rate of liquid helium, and the measured flow rate does not match outside the control range or the temperature change of the liquefied hydrogen is detected. When the temperature of the liquefied hydrogen is lowered, the first blocking valve 1103 or the second blocking valve 1203 blocks the first liquid helium connector 1100 or the second liquid helium connector 1200, respectively. It includes a first mass flow controller (1101) and a second mass flow controller (1201).

The first sensor line 1111 of the first mass flow controller 1101 measures the flow rate of liquid helium. The flow rate of liquid helium measured by the first sensor line 1111 is output to the first control circuit unit 1120, and the first control circuit unit 1120 detects that the output flow rate of liquid helium does not match outside the preset range or liquefied hydrogen When the temperature of the liquefied hydrogen at the point where the temperature change is detected is lowered again, the first blocking valve 1103 is controlled to block the supply of liquid helium to the corresponding liquid helium connector 1100.

That is, the first liquid helium connector 1100 includes a first mass flow controller 1101, and the second liquid helium connector 1200 includes a second mass flow controller 1201. The first mass flow controller 1101 controls the first control valve 1104 to control the liquid helium supply flow rate, and the second mass flow controller 1201 controls the second control valve to control the liquid helium supply flow rate. Meanwhile, the first mass flow controller 1101 controls the first blocking valve 1103 to block the supply of liquid helium to the first liquid helium connector 1100, and the second mass flow controller 1201 controls the second blocking valve 1103. The valve 1203 is controlled to block the supply of liquid helium to the second liquid helium connector 1200. The control valve 1104 may be included in the mass flow controllers 1101 and 1201, and the blocking valves 1103 and 1203 may be included in the liquid helium connectors 1100 and 1200.

The first liquid helium connector 1100 and the second liquid helium connector 1200 may not operate together. For example, when the first blocking valve 1103 is opened and liquid helium flows into the first liquid helium connector 1100, the second blocking valve 1203 of the second liquid helium connector 1200 is blocked and the second Liquid helium does not flow in the liquid helium connector 1200. Likewise, when the second blocking valve 1203 is opened and liquid helium flows into the second liquid helium connector 1200, the first blocking valve 1103 of the first liquid helium connector 1100 is blocked and the first liquid helium flows. Liquid helium does not flow in the helium connector 1100. Therefore, if one of the mass flow controllers (1101, 1201) fails, it is possible for the liquid helium connectors (1100, 1200) including the other mass flow controllers (1101, 1201) to operate.

The mass flow controllers 1101 and 1201 may further include an alarm device (not shown) that displays an alarm when one of the mass flow controllers 1101 and 1201 fails. The alarm device may be a known device that can display an alarm with an alarm light, an alarm sound, etc. Alternatively, the alarm device may transmit the information to an external server through the communication device 230 described above.

The external server that has received information from the control circuit unit 1120 that the mass flow controllers 1101 and 1201 have failed can retransmit the received information to another external server. Information generated by the control circuit unit 1120 may further include effective hopping number information and final hopping device information.

The effective hopping number information includes the number of times the external server that first received the broken information transmits data to another external server. For example, if the number of transmissions included in the effective hopping count information is preset to 10, the broken information is transmitted only 10 times to other external servers after the first external server to which it was transmitted, and is transmitted only 10 times to the external server sent for the 10th time. disappears. This has the effect of limiting the range at which faulty information is transmitted when liquid hydrogen is only stored rather than being transported. In other words, the broken information can be controlled to be transmitted only to the administrator who manages the container.

The final hopping device information is information that is set to no longer be transmitted when broken information is transmitted to a specific external server, regardless of the effective hopping number information. For example, the final hopping device information can be set to be transmitted only to the external server that first or last managed the container, and when the final hopping device information is set, it is transmitted to the external server set regardless of the effective hopping count information. It can be controlled so that the broken information is retransmitted and sent to an external server that must receive the broken information. Final hopping device information is more effective when the container is being transported after being loaded on a vehicle or ship.

Figure 16 is another embodiment of a mass flow controller according to the present invention.

Referring to FIG. 16, the mass flow controller (1101, 1201) according to the present invention may further include a linear control module 1130 that linearly relieves the pressure when supplying liquid helium.

The linear control module 1130 according to the present invention may be coupled to one side of the main line 1110 of the mass flow controllers 1101 and 1201. The linear control module 1130 includes a linear control cylinder 1131 in which liquid helium or the like is accommodated in an internal space. One end of the linear control cylinder 1131 communicates with the main line 1110 through which liquid helium flows. Accordingly, liquid helium can be introduced (D) or discharged through one end of the linear control cylinder (1131) in communication with the main line (1110).

Inside the linear control cylinder 1131, a linear control elastic body 1133 is provided that advances and retreats toward one end and the other end connected to the main line 1110. The linear control elastic body 1133 retreats toward the other connected end as liquid helium flows into the linear control cylinder 1131 (D). That is, as liquid helium, etc., is accommodated in the internal space of the linear control module 1130, the linear control elastic body 1133 moves toward the other end (downward direction in the picture) and reacts to the liquid helium flowing into the mass flow controllers 1101 and 1201. Since the pressure can be gradually raised, damage to the mass flow controllers (1101, 1201) due to the initial pressure caused by the liquid helium flowing into the mass flow controllers (1101, 1201) can be prevented.

The external server according to the present invention is a terminal such as a desktop PC, laptop PC, tablet PC, or smartphone equipped with an input means such as a keyboard, mouse, touchpad, or touch screen, and a display screen, but is not limited thereto, and is not limited to a communication network. It can be connected to another external server through , and any configuration that can process digital information that can input search information and selection information and install an application program that can display search result information can be included. The external server according to the present invention is a component that connects to another server through a communication network to transmit and receive information, for example, a smartphone, a tablet personal computer, a mobile phone, a video phone, and a desktop. Desktop personal computer (PC), laptop personal computer, netbook computer, personal digital assistant (PDA), portable multimedia player (PMP), wearable device (e.g. smart glasses, head-worn It may include at least one of a device (head-mounted-device (HMD), etc.), an unmanned terminal (kiosk), or a smart watch.

The communication device 230 and the external server according to the present invention can communicate through each communication unit and communication network. A communication network refers to a connection structure that allows information exchange between nodes such as terminals and servers. Examples of such communication networks include the 3rd Generation Partnership Project (3GPP) network, Long Term Evolution (LTE) network, and 5G. Network, WIMAX (World Interoperability for Microwave Access) network, Internet, LAN (Local Area Network), Wireless LAN (Wireless Local Area Network), WAN (Wide Area Network), PAN (Personal Area Network), wifi network, It includes, but is not limited to, a Bluetooth network, satellite broadcasting network, analog broadcasting network, and DMB (Digital Multimedia Broadcasting) network. The communication unit provided by the communication device 230 and the external server may include electronic components provided for the communication network to enable wired and wireless data communication through the communication network.

In this specification, 'part' includes a unit realized by hardware, a unit realized by software, and a unit realized using both. Additionally, one unit may be realized using two or more pieces of hardware, and two or more units may be realized using one piece of hardware. Also, ‘device’, ‘member’, etc. are the same.

The scope of protection of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is to be added once again that the scope of protection of the present invention may not be limited due to changes or substitutions that are obvious in the technical field to which the present invention pertains.

100: container housing 110: container frame
111: upper surface 112: lower surface
113: left side 114: right side
115: Door side 117: Insulating partition
120: insulation space 121: foam core member
123: multilayer insulation 130: device space
140: Grid structure shape 150: Independent door
200: Liquid hydrogen storage container 201: Liquid helium tube
203: liquid helium tube 205: liquid helium tube
207: Liquid helium tube 209: Mounting plate
210: insulation material 211: container fixing device
220: Liquid helium supply device 230: Communication device
240: Vacuum pump device 250: Fuel cell and battery device
260: vaporized hydrogen recovery device 261: vaporized hydrogen recovery pipe
271: sensor unit 273: liquefied hydrogen inlet and outlet
1000: Standard transport container for liquid hydrogen that can minimize vaporization of liquid hydrogen
1100: first liquid helium connector 1101: first mass flow controller
1103: first blocking valve 1104: first control valve
1110: first main line 1111: first sensor line
1113: first bypass line 1114: first bypass
1115: first sensing coil 1116: first jurisdiction
1120: First control circuit 1130: Linear control module
1131: Linear control cylinder 1133: Linear control elastic body
1200: second liquid helium connector 1201: second mass flow controller
1203: Second blocking valve 1210: Second main line

Claims (5)

container housing;
A liquid hydrogen storage container included in the container housing and storing liquid hydrogen therein;
a liquid helium pipe formed around the outer surface of the liquid hydrogen storage container and preventing liquid helium from flowing through the internal space and evaporating the liquid hydrogen; and
Liquid helium is connected to one end and the other end of the liquid helium tube, respectively, supplies the liquid helium into the liquid helium tube through one end of the liquid helium tube, and recovers the liquid helium through the other end of the liquid helium tube. supply device;
Includes,
The container housing is,
An insulating partition separating the insulating space where the liquefied hydrogen storage container is located and the device space where the liquid helium supply device is located inside the container housing from each other;
A standard transport container for liquefied hydrogen capable of minimizing vaporization of liquefied hydrogen, comprising: In claim 1,
The container housing is,
container frame; and
an insulating wall coupled to the outside of the container frame to form an outer wall of the container housing;
Including,
The insulation wall is,
Upper surfaces coupled to the upper, lower, left, right, and front sides of the container frame, respectively; if; Left side; Woomyeon; Front; and
A door surface coupled to the rear of the container frame and opening and closing the interior of the container housing;
Including,
The insulation wall and the insulation partition are each
A foam core member located on the outside, the outer surface of which is made of a steel plate, and the inside of which includes a foam core layer containing vacuum glass beads; and
A multi-layer insulating material located inside the foam core member, having an outer surface made of stainless steel, and including a vacuum layer therein;
A standard transport container for liquefied hydrogen capable of minimizing vaporization of liquefied hydrogen, comprising: In claim 2,
Inside the insulated space, a plurality of mounting plates are formed so as to be in contact with the outer surface of the liquefied hydrogen storage container and on which the liquefied hydrogen storage container is mounted,
On the lower surface of the upper surface,
Standard transportation of liquefied hydrogen containers capable of minimizing vaporization of liquefied hydrogen, including a container fixing device that presses and secures the top of the liquefied hydrogen storage container in a downward direction to prevent shaking of the liquefied hydrogen storage container. container. In claim 1,
The container housing is,
A pressure sensor that detects a leak of hydrogen gas in which the liquefied hydrogen has been vaporized in the liquefied hydrogen storage container and detects a change in pressure in the liquefied hydrogen storage container; and
A temperature sensor that detects the temperature of liquefied hydrogen stored in the liquefied hydrogen storage container;
It further includes,
Inside the device space,
A communication device that transmits the leak of hydrogen gas detected by the pressure sensor, the pressure change in the liquefied hydrogen storage container, or the temperature of liquefied hydrogen detected by the temperature sensor to an external server through a communication network;
A standard transport container for liquefied hydrogen capable of minimizing vaporization of liquefied hydrogen, further comprising enabling remote monitoring of liquefied hydrogen. In claim 1,
Inside the insulated space,
An insulating material that fills the space between the outer surface of the liquefied hydrogen storage container and the inner surface of the container housing is further included,
The insulation material is,
A standard transport container for liquid hydrogen capable of minimizing vaporization of liquid hydrogen, characterized by comprising a foam containing vacuum glass beads inside.