Cryogenic material slush production system

Abstract

To provide a slush production system for cryogenic materials, which can efficiently produce, store a large amount of cryogenic materials at a high storage density, and store the cryogenic materials stably for a long period of time. [Solution] The slush production system includes a liquid-phase cryogenic material supply unit that stores and supplies liquid-phase cryogenic material; a phase change unit that is connected to the liquid-phase cryogenic material supply unit and receives the liquid-phase cryogenic material from the liquid-phase cryogenic material supply unit, and generates a slush cryogenic material containing a mixture of liquid and solid phase cryogenic material as the liquid-phase cryogenic material changes phase to gas-phase cryogenic material and solid-phase cryogenic material; and a cold circulation unit that is connected to the phase change unit and supplies a cold supply medium to the phase change unit, causing the liquid-phase cryogenic material to change phase to gas-phase cryogenic material and solid-phase cryogenic material through the cold of the cold supply medium. The gas-phase cryogenic material in the phase change unit changes phase again due to the cold of the cold supply medium, and the pressure inside the phase change unit is reduced during the process of the gas-phase cryogenic material changing phase due to the cold of the cold supply medium.

Description

[Technical Field]

[0001] The present invention relates to a cryogenic material slush production system. [Background technology]

[0002] The world has an economic structure based on fossil fuels such as oil and coal. However, as the world's population increases and economies around the world grow, the use of fossil fuels has skyrocketed, causing problems of environmental pollution and global warming. In particular, we must prepare for supply instability of petroleum, currently the most widely used energy source. In other words, we must seek sustainable economic growth while also preparing for environmental pollution and the weaponization of resources caused by the use of fossil fuels.

[0003] However, because the issues of efficient energy use and environmental conservation are organically linked, existing fossil energy must be used efficiently, and at the same time, clean energy must be used appropriately to solve the energy supply problem.To this end, research has recently emerged into using cryogenic materials such as liquid hydrogen and natural gas as clean energy sources instead of fossil energy.

[0004] As part of this research, a method of storing cryogenic materials by turning them into slush has been proposed. Conventional methods involve a freeze-thaw method in which, when the liquid cryogenic material is decompressed to near its triple point, some of the liquid cryogenic material evaporates into gaseous cryogenic material such as gaseous hydrogen on the surface. The latent heat of evaporation generated at this time lowers the temperature of the liquid cryogenic material, causing solid cryogenic material such as solid hydrogen to crystallize on the surface of the liquid cryogenic material.

[0005] However, because the freezing and thawing of the liquid-phase cryogenic material begins at the top of the insulated container, there is a problem that, over time, the liquid-phase cryogenic material that has undergone freezing and thawing at the top of the insulated container separates from the liquid-phase cryogenic material that has not undergone freezing and thawing at the bottom of the insulated container. This problem acts as a factor that hinders the evaporation of the liquid-phase cryogenic material, making it difficult for the solid fraction of the slush cryogenic material generated inside the insulated container to increase beyond a predetermined fraction.

[0006] To solve this problem, a conventional method uses an agitator to create a vortex inside the insulated container, preventing the separation of the liquid cryogenic material in the upper part of the insulated container where freezing and thawing has occurred from the liquid cryogenic material in the lower part of the insulated container where freezing and thawing has not occurred. However, since the agitator is generally a rotating body with a rotating shaft, leakage caused by a gap between the rotating shaft and the insulated container can pose a risk of explosion.

[0007] In addition, conventionally, a vacuum pump is used to reduce the pressure inside the insulated container to near the triple point. However, as the pressure inside the insulated container reaches the triple point by operating the vacuum pump, the boiling point of the liquid drops. However, because the temperature of the liquid cryogenic material is higher than the lowered boiling point, the liquid cryogenic material rapidly vaporizes after the vacuum pump is turned on, causing the pressure inside the insulated container to become unstable. Furthermore, the vaporized gaseous cryogenic material inside the insulated container is expelled outside the insulated container through the vacuum pump, resulting in a loss of total mass.

[0008] Therefore, there is a need for a cryogenic material slush production system that can efficiently produce slush cryogenic material without losing total mass, store large amounts of cryogenic material at a higher storage density than conventional systems, and store cryogenic material stably for long periods of time. Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been devised to solve the above-mentioned problems of the related art, and aims to provide a cryogenic material slush production system that can efficiently produce slush cryogenic material without losing total mass, store large amounts of cryogenic material at a higher storage density than conventional systems, and store cryogenic material stably for a long period of time. [Means for solving the problem]

[0010] According to one aspect of the present invention, a liquid-phase cryogenic material supply unit that stores and supplies a liquid-phase cryogenic material; a phase change unit that is connected to the liquid-phase cryogenic material supply unit and receives the liquid-phase cryogenic material from the liquid-phase cryogenic material supply unit, and changes the phase of the liquid-phase cryogenic material into a gas-phase cryogenic material and a solid-phase cryogenic material to generate a slush cryogenic material in which the liquid-phase cryogenic material and the solid-phase cryogenic material are mixed; and a cold circulation unit that is connected to the phase change unit and supplies a cold supply medium to the phase change unit, and induces the liquid-phase cryogenic material to change into the gas-phase cryogenic material and the solid-phase cryogenic material through the cold of the cold supply medium, wherein the gas-phase cryogenic material in the phase change unit is The cold circulation unit may include a second heat exchanger disposed within the phase change unit and configured to transfer the cold of the cold supply medium to the liquid-phase cryogenic material within the phase change unit, and the gas-phase cryogenic material that has moved upward from the interior of the phase change unit changes phase again due to the cold of the cold supply medium supplied through the second heat exchanger. During the process of the gas-phase cryogenic material that has moved upward from the interior of the phase change unit changing phase due to the cold of the cold supply medium supplied through the second heat exchanger, an internal upper pressure of the phase change unit is reduced, thereby forming a vacuum within the internal upper portion of the phase change unit. [Effects of the Invention]

[0011] According to an embodiment of the present invention, it is possible to efficiently produce slush cryogenic material without losing total mass, to store large amounts of cryogenic material at a higher storage density than conventional methods, and to store cryogenic material stably for a long period of time. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a block diagram illustrating a cryogenic material slush production system according to one embodiment of the present invention. [Figure 2] FIG. 2 is a simplified process diagram showing the cryogenic material slush production system of FIG. 1. [Figure 3] FIG. 2 is a process diagram specifically illustrating the cryogenic material slush production system of FIG. 1. [Figure 4] 2 is a configuration diagram showing a phase change unit of the cryogenic material slush production system of FIG. 1. [Figure 5] 2 is a graph for explaining the phase change of the liquid-phase cryogenic material in the phase change section of the slush production system using the cryogenic material of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments for embodying the concept of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, if it is determined that a specific description of related publicly known configurations or functions may obscure the gist of the present invention, the detailed description will be omitted.

[0014] Furthermore, when a component is referred to as being "bonded" or "connected" to another component, it should be understood that the component may be directly bonded or connected to the other component, but that there may also be other components in between. The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the present invention. A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0015] Furthermore, it should be made clear in advance that expressions such as one side, the other side, the upper side, the lower side, etc. in this specification are described with reference to the drawings, and that they will be expressed differently if the direction of the corresponding object is changed. For the same reason, some components in the accompanying drawings are exaggerated, omitted, or illustrated schematically, and the size of each component does not completely reflect the actual size.

[0016] Furthermore, terms including ordinal numbers such as first, second, etc. may be used to describe various components, but the components are not limited by such terms. These terms are used only to distinguish one component from another. The meaning of "comprising" as used in this specification is to embody certain properties, regions, integers, steps, operations, elements and / or components, and does not exclude the presence or addition of other certain properties, regions, integers, steps, operations, elements, components and / or groups.

[0017] Hereinafter, a specific configuration of a cryogenic material slush production system according to one embodiment of the present invention will be described with reference to the drawings.

[0018] 1 to 4, a cryogenic material slush production system 1 according to one embodiment of the present invention is a Brayton cycle-based slush production system that uses saturated helium, which can supply cold, as a working fluid, and includes a liquid-phase cryogenic material supply unit 10, a phase change unit 20, a cold / heat circulation unit 30, a pressure adjustment unit 40, and a power supply unit 50.

[0019] The liquid-phase cryogenic material supply unit 10 can store a liquid-phase cryogenic material (cryogenic fluid) and supply the stored liquid-phase cryogenic material to the phase change unit 20. To this end, the liquid-phase cryogenic material supply unit 10 can include a liquid-phase cryogenic material storage container 11.

[0020] The liquid-phase cryogenic material storage container 11 may have a storage space therein for storing a liquid-phase cryogenic material. In this case, the liquid-phase cryogenic material stored in the liquid-phase cryogenic material storage container 11 may include, for example, at least one of liquid nitrogen, liquid oxygen, and natural gas.

[0021] The liquid-phase cryogenic material stored in the liquid-phase cryogenic material storage container 11 can be transferred to the inner chamber 21 of the phase change unit 20, which will be described later. To this end, a supply line 211 can be connected between the liquid-phase cryogenic material storage container 11 and the inner chamber 21 of the phase change unit 20, which will be described later. One end of the supply line 211 can be connected to the liquid-phase cryogenic material storage container 11, and the other end of the supply line 211 can be connected to the inner chamber 21 of the phase change unit 20, which will be described later.

[0022] The phase change unit 20 may be supplied with a liquid-phase cryogenic material from the liquid-phase cryogenic material supply unit 10. At this time, the liquid-phase cryogenic material supplied to the phase change unit 20 may undergo a phase change into a gas-phase cryogenic material and a solid-phase cryogenic material from the phase change unit 20, thereby generating a slush cryogenic material in which the liquid-phase cryogenic material and the solid-phase cryogenic material are mixed. For this purpose, the phase change unit 20 may include an inner chamber 21 and an outer chamber 22.

[0023] The inner chamber 21 is the part where the phase change of the liquid-phase cryogenic material supplied from the liquid-phase cryogenic material supply unit 10 actually takes place, and the inner chamber 21 may be made of a material that has high tensile strength, low density, and low reactivity with the cryogenic material, such as, for example, austenitic steel, copper, or aluminum alloy.

[0024] Meanwhile, the pressure inside the inner chamber 21, where the phase change of the liquid-phase cryogenic material occurs, can be adjusted by the pressure adjusting unit 40. For example, when the pressure inside the inner chamber 21 is reduced to a vacuum state by the pressure adjusting unit 40, the pressure of the liquid-phase cryogenic material contained inside the inner chamber 21 decreases, and the temperature of the liquid-phase cryogenic material may decrease. Such changes in the pressure and temperature of the liquid-phase cryogenic material may induce a phase change of the liquid-phase cryogenic material, as will be described later.

[0025] The outer chamber 22 is a chamber provided outside the inner chamber 21, and the inner chamber 21 may be provided inside the outer chamber 22. In this case, the outer chamber 22 may be formed to a size capable of accommodating the inner chamber 21 therein. As a result, the inner surface of the outer chamber 22 and the outer surface of the inner chamber 21 may be spaced apart from each other. As a result, heat applied to the outer chamber 22 is prevented from being conducted to the inner chamber 21 and a direct impact may be prevented from being applied to the inner chamber 21. For example, the outer chamber 22 may be made of substantially the same material as the inner chamber 21.

[0026] Meanwhile, a vacuum line (not shown) may be connected to the outer chamber 22, which creates a vacuum in the space between the inner surface of the outer chamber 22 and the outer surface of the inner chamber 21. When the space between the inner surface of the outer chamber 22 and the outer surface of the inner chamber 21 is created in a vacuum, vacuum insulation is achieved. This prevents heat applied to the outer chamber 22 from being transferred to the inner chamber 21 by convection. A vacuum insulation member (not shown) may be provided in the space between the inner surface of the outer chamber 22 and the outer surface of the inner chamber 21. This vacuum insulation member prevents heat applied to the outer chamber 22 from being transferred to the inner chamber 21. For example, the vacuum insulation member may be a double-shielding material made of aerogel or aluminum and glass fiber.

[0027] The cold / heat circulating unit 30 can continuously supply cold to the liquid-phase cryogenic material supplied to the phase change unit 20. The cold supplied from the cold / heat circulating unit 30 to the phase change unit 20 induces a phase change of the liquid-phase cryogenic material in the phase change unit 20, so that a slush cryogenic material in which liquid-phase cryogenic material and solid-phase cryogenic material are mixed can be generated in the phase change unit 20.

[0028] In addition, the cold supplied from the cold circulation unit 30 to the phase change unit 20 can cause the gas-phase cryogenic material, which has undergone a phase change from liquid to gas, to undergo a phase change again, thereby forming a vacuum in the phase change unit 20. In summary, the cold provided by the cold circulation unit 30 can be used not only to supercool the liquid-phase cryogenic material and induce the liquid-phase cryogenic material to turn into slush, but also to reduce the pressure inside the phase change unit 20, thereby forming a vacuum inside the phase change unit 20.

[0029] For this purpose, the cold / heat circulation unit 30 may be connected to the phase change unit 20 and may include a compressor 31, a first heat exchanger 32, a turbine 33, and a second heat exchanger 34. In this case, the cold / heat circulation unit 30 may continuously circulate helium, which is a cold supply medium, between the compressor 31, the first heat exchanger 32, the turbine 33, and the second heat exchanger 34 based on a closed Brayton cycle.

[0030] The compressor 31 may be supplied with and compress a cold heat supply medium. The cold heat supply medium compressed by the compressor 31 may be discharged from the compressor 31 and transferred to the first heat exchanger 32 via a first transfer line 321. The compressor 31 may be connected to a fuel cell 51 of a power supply unit 50 (described later) via a power line 512 and may be driven by power supplied from the fuel cell 51. In addition, when the liquid-phase cryogenic fluid supplied to the phase change unit 20 is, for example, hydrogen or natural gas, the gas discharged to the fuel cell 51 of the power supply unit 50 (described later) may provide part of the power required by the compressor 31.

[0031] The first heat exchanger 32 is supplied with the cold heat supply medium compressed by the compressor 31, and can recover the heat of compression generated in the process of compressing the cold heat supply medium from the compressor 31.

[0032] The first heat exchanger 32 can exchange heat between the cold heat supply medium discharged from the compressor 31 via the first transfer line 321 and the cold heat supply medium recovered from the second heat exchanger 34 via the recovery line 342. The cold heat supply medium recovered from the second heat exchanger 34 via the recovery line 342 exchanges heat with the cold heat supply medium discharged from the compressor 31 via the first transfer line 321, and then can be supplied to the compressor 31 again to be compressed.

[0033] The turbine 33 can be supplied with the cold heat supply medium whose compression heat has been recovered from the first heat exchanger 32, and can expand and cool the cold heat supply medium. The cold heat supply medium supplied to the turbine 33 from the first heat exchanger 32 may be in a state of heat exchange with the cold heat supply medium recovered from the second heat exchanger 34 via the recovery line 342. The cold heat supply medium discharged from the turbine 33 may be supplied to the second heat exchanger 34 by, for example, a self pressure build up (Self PBU) method using a heater.

[0034] The cold heat supply medium from which the heat of compression has been recovered from the first heat exchanger 32 may be supplied to the turbine 33 via the second transfer line 331 to provide rotational force to the turbine 33. Power for producing electricity is generated by the rotational force of the turbine 33, and the cold heat supply medium that has been expanded in the turbine 33 may be supplied to the second heat exchanger 34 via the third transfer line 341.

[0035] The second heat exchanger 34 may transfer the cold energy of the cold energy supply medium cooled by the turbine 33 to the liquid-phase cryogenic material in the phase change unit 20. To this end, the second heat exchanger 34 may be provided inside the phase change unit 20, and may be provided as a spiral tubular heat exchanger, for example. The second heat exchanger 34 may also be connected to the turbine 33 via a third transfer line 341.

[0036] When the cold energy from the cold supply medium is transferred to the liquid-phase cryogenic material in the phase change unit 20 through the second heat exchanger 34, the gas-phase cryogenic material in the upper part of the phase change unit 20 can be cooled. When the gas-phase cryogenic material in the upper part of the phase change unit 20 is cooled, the average distance between gas molecules increases due to a density difference caused by a volume reduction. As a result, the pressure in the upper part of the phase change unit 20 can decrease, and a vacuum can be formed in the upper part of the phase change unit 20.

[0037] The cold heat supply medium that has completed heat exchange with the liquid-phase cryogenic material inside the phase change unit 20 from the second heat exchanger 34 is discharged through the recovery line 342 and can be supplied again to the first heat exchanger 32. The cold heat supply medium recovered in the first heat exchanger 32 can again exchange heat with the cold heat supply medium discharged from the compressor 31 to the first heat exchanger 32.

[0038] Meanwhile, the cold circulation unit 30 is provided in a closed state, and as the cold supply medium continuously circulates through the compressor 31, the first heat exchanger 32, the turbine 33, and the second heat exchanger 34, the cold of the cold supply medium can be continuously and sufficiently supplied to the phase change unit 20. As a result, the gas-phase cryogenic material in the upper part of the phase change unit 20 can be cooled to a temperature below the boiling point by the cold of the cold supply medium.

[0039] When the gas-phase cryogenic material in the upper part of the phase change unit 20 is sufficiently cooled to a temperature below the boiling point in this manner, the vacuum pump 42 of the pressure control unit 40 (described later) is driven to reduce the pressure in the phase change unit 20, thereby preventing the liquid-phase cryogenic material in the phase change unit 20 from suddenly evaporating. Furthermore, the total mass of the slush cryogenic material generated in the phase change unit 20 can be prevented from being lost.

[0040] The pressure adjusting unit 40 may further adjust the pressure of the phase change unit 20 in response to the liquid-phase cryogenic material supplied to the phase change unit 20, thereby forming an additional vacuum in the phase change unit 20. For example, if the amount of heat supplied by the liquid-phase cryogenic material supplied to the phase change unit 20 is insufficient, the pressure adjusting unit 40 may be driven to reduce the pressure inside the phase change unit 20.

[0041] When the pressure inside the phase change unit 20 is reduced by the pressure adjusting unit 40, a phase change of the liquid-phase cryogenic material supplied from the liquid-phase cryogenic material supply unit 10 to the phase change unit 20 is induced, and a slush cryogenic material in which the liquid-phase cryogenic material and the solid-phase cryogenic material are mixed can be generated in the phase change unit 20. To this end, the pressure adjusting unit 40 can be connected to the phase change unit 20 and can include a vacuum buffer tank 41 and a vacuum pump 42.

[0042] For example, the vacuum buffer tank 41 may be provided as a buffer tank in which a medium vacuum is created. The vacuum buffer tank 41 may be connected to the inner chamber 21 via a first vacuum line 411 and to the vacuum pump 42 via a second vacuum line 412.

[0043] The vacuum pump 42 may be connected to the inner chamber 21. The vacuum pump 42 may reduce the pressure inside the inner chamber 21, thereby reducing the pressure of the liquid-phase cryogenic material contained inside the inner chamber 21 and reducing the temperature of the liquid-phase cryogenic material.

[0044] When the pressure inside the inner chamber 21 is reduced by the vacuum pump 42 to form a vacuum inside the inner chamber 21, the liquid-phase cryogenic material contained inside the inner chamber 21 can be evaporated. At this time, the temperature of the liquid-phase cryogenic material is lowered by the generated latent heat of evaporation, and the liquid-phase cryogenic material can be solidified.

[0045] At this time, the vacuum pump 42 may be connected to a fuel cell 51 of a power supply unit 50 (to be described later) via a power line 511. Thus, the vacuum pump 42 may be supplied with power from the fuel cell 51 of the power supply unit 50 (to be described later). This will be described later.

[0046] The power supply unit 50 can selectively supply power to at least one of the cold / heat circulation unit 30 and the pressure adjustment unit 40. In other words, the power supply unit 50 can generate electricity required to drive at least one of the cold / heat circulation unit 30 and the pressure adjustment unit 40.

[0047] To this end, the power supply unit 50 may be provided as at least one fuel cell 51. The fuel cell 51 may be connected to the vacuum pump 42 and the compressor 31 via power lines 511 and 512, respectively. Thus, electricity produced by the fuel cell 51 may be used as a driving source for the vacuum pump 42 or the compressor 31.

[0048] 5 shows a graph for explaining the phase change of the liquid-phase cryogenic material in the phase change portion 20. As shown in FIG. Referring to FIG. 5, the liquid-gas coexistence line is a curve that runs from the bottom left to the top right. From the first point A on the liquid-gas coexistence line, i.e., the point having the first temperature T1 and the first pressure P1, through the second point B, i.e., the point having the second temperature T2 and the second pressure P2, to the third point C, i.e., the point having the third temperature T3 and the third pressure P3, the pressure and temperature of the liquid-phase cryogenic material decrease.

[0049] In particular, when the liquid-phase cryogenic material reaches the third point C, i.e., the triple point, the liquid-phase cryogenic material may undergo a phase change to a solid-phase cryogenic material. In other words, even if the liquid-phase cryogenic material supplied from the liquid-phase cryogenic material supply unit 10 to the phase change unit 20 evaporates, the liquid-phase cryogenic material cannot escape the liquid-gas coexistence line. In this state, when the temperature T3 of the liquid-phase cryogenic material reaches the triple point, the liquid-phase cryogenic material changes to a solid-phase cryogenic material, and a slush cryogenic material, in which liquid-phase and solid-phase cryogenic materials are mixed, may be generated inside the inner chamber 21.

[0050] The cryogenic material slush production system 1 configured as described above continuously supplies the cold energy of helium to the phase change unit 20 based on the Brayton cycle using helium as the working fluid, and liquefies the gas-phase cryogenic material into the cold energy of helium in the phase change unit 20, thereby reducing the internal pressure of the phase change unit 20 and forming a vacuum inside the phase change unit 20. This prevents the gas-phase cryogenic material from suddenly evaporating, thereby resulting in the effect of efficiently producing slush cryogenic material without a loss of total mass compared to conventional systems.

[0051] Furthermore, since the slushed cryogenic material can be densified by solid particles, it has the effect of being possible to store large amounts of cryogenic material at a higher storage density than conventional methods.

[0052] Furthermore, when the slushed cryogenic material is transported through a separate pipe, the heat entering from the outside is absorbed by the heat of fusion of the solid particles, reducing the temperature rise of the liquid cryogenic material, thereby reducing the generation of evaporated gas and enabling the cryogenic material to be stored more stably for a longer period of time than before.

[0053] Although the embodiments of the present invention have been described above as specific embodiments, these are merely examples, and the present invention is not limited thereto and should be construed as having the broadest scope in accordance with the basic concepts disclosed herein. Those skilled in the art may combine / substitute the disclosed embodiments to create patterns, but this would not depart from the scope of the present invention. In addition, those skilled in the art may easily modify or change the embodiments disclosed herein, and it is clear that such modifications and changes also fall within the scope of the present invention. [Explanation of symbols]

[0054] 1 Slush Production System 10 Liquid phase cryogenic material supply section 11 Liquid-phase cryogenic material storage vessel 20 Phase change section 21 Inner chamber 22 outer chamber 30 Cooling and heating circulation section 31 Compressor 32 1st heat exchanger 33 Turbine 34 Second heat exchanger 40 Pressure adjustment section 41 Vacuum buffer tank 42 Vacuum pump 50 Power supply section 51 Fuel Cell 211 Supply Line 321 First Transfer Line 331 Second Transfer Line 341 Third Transfer Line 342 Recovery Line 411 First Vacuum Line 412 Second Vacuum Line 511, 512 Power lines

Claims

1. a liquid-phase cryogenic material supply unit that stores and supplies a liquid-phase cryogenic material; a phase change unit connected to the liquid-phase cryogenic material supply unit, receiving the liquid-phase cryogenic material from the liquid-phase cryogenic material supply unit, and changing the phase of the liquid-phase cryogenic material into a gas-phase cryogenic material and a solid-phase cryogenic material to generate a slush cryogenic material in which the liquid-phase cryogenic material and the solid-phase cryogenic material are mixed; a cold circulation unit connected to the phase change unit to supply a cold supply medium to the phase change unit and induce a phase change of the liquid-phase cryogenic material to the gas-phase cryogenic material and the solid-phase cryogenic material through the cold of the cold supply medium, the gas-phase cryogenic material in the phase change portion moves from the inside of the phase change portion to the upper side; The cold / heat circulation unit is a second heat exchanger provided inside the phase change unit and configured to transfer the cold of the cold supply medium to the liquid-phase cryogenic material inside the phase change unit; The gas-phase cryogenic material that has moved upward from the inside of the phase change unit undergoes a phase change again due to the cold heat of the cold heat supply medium that is supplied via the second heat exchanger, a pressure inside the phase change unit decreases and a vacuum is formed inside the phase change unit during a phase change process of the gas-phase cryogenic material moving upward from inside the phase change unit due to the cold heat of the cold heat supply medium supplied through the second heat exchanger.

2. The cold / heat circulation unit is a compressor that receives the cold heat supply medium and compresses it; a first heat exchanger that receives the cold heat supply medium compressed by the compressor and recovers heat of compression generated during the compression of the cold heat supply medium; a turbine that receives the cold heat supply medium from which the heat of compression has been recovered in the first heat exchanger, expands the cold heat supply medium, and cools the medium, 2. The system for producing slush from a cryogenic material according to claim 1, wherein the second heat exchanger is connected to the turbine and receives the cold heat of the cold supply medium cooled by the turbine.

3. The cold / heat circulation unit is a recovery line connected between the first heat exchanger and the second heat exchanger; 3. The system for producing cryogenic material slush according to claim 2, wherein the cold heat supply medium, after completing the cold heat transfer to the liquid-phase cryogenic material in the second heat exchanger, is transported to the first heat exchanger via the recovery line.

4. 3. The system for producing slush cryogenic material according to claim 2, further comprising a pressure adjusting unit connected to the phase change unit and selectively adjusting an internal pressure of the phase change unit in response to the liquid-phase cryogenic material supplied to the phase change unit.

5. 5. The system for producing slush from a cryogenic material according to claim 4, further comprising a power supply unit selectively supplying power to at least one of the cold / hot circulation unit and the pressure adjustment unit.

6. a liquid-phase cryogenic material supply unit that stores and supplies a liquid-phase cryogenic material; a cold circulation unit connected to the phase change unit to supply a cold supply medium to the phase change unit and induce the liquid-phase cryogenic material to change into a gas-phase cryogenic material and a solid-phase cryogenic material through the cold of the cold supply medium; The gas-phase cryogenic material in the phase change unit changes phase again due to the cold of the cold heat supply medium, and the pressure inside the phase change unit is reduced during the process of the gas-phase cryogenic material changing phase due to the cold of the cold heat supply medium, The cold / heat circulation unit is a compressor that receives the cold heat supply medium and compresses it; a first heat exchanger that receives the cold heat supply medium compressed by the compressor and recovers heat of compression generated during the compression of the cold heat supply medium; a turbine that receives the cold heat supply medium from which the heat of compression has been recovered in the first heat exchanger, expands the cold heat supply medium, and cools the medium; a second heat exchanger provided in the phase change unit and configured to transfer the cold of the cold supply medium cooled by the turbine to the liquid-phase cryogenic material in the phase change unit; The cold / heat circulation unit is a recovery line connected between the first heat exchanger and the second heat exchanger; The cold supply medium, which has completed the cold heat transfer to the liquid-phase cryogenic material in the second heat exchanger, is transferred to the first heat exchanger through the recovery line; a power supply unit that selectively supplies power to at least one of the heat and cold circulation unit and the pressure adjustment unit; The phase change portion is an inner chamber having a space for receiving the liquid-phase cryogenic material and allowing a phase change of the liquid-phase cryogenic material, the inner chamber having the second heat exchanger disposed therein; an outer chamber provided outside the inner chamber and spaced apart from the inner chamber; At least a portion of the liquid-phase cryogenic material to which the cold heat of the cold heat supply medium cooled by the turbine has been transferred is vaporized inside the inner chamber by the second heat exchanger.

7. a liquid-phase cryogenic material supply unit that stores and supplies a liquid-phase cryogenic material; a phase change unit connected to the liquid-phase cryogenic material supply unit, receiving the liquid-phase cryogenic material from the liquid-phase cryogenic material supply unit, and changing the phase of the liquid-phase cryogenic material into a gas-phase cryogenic material and a solid-phase cryogenic material to generate a slush cryogenic material in which the liquid-phase cryogenic material and the solid-phase cryogenic material are mixed; a cold circulation unit connected to the phase change unit to supply a cold supply medium to the phase change unit and induce a phase change of the liquid-phase cryogenic material to the gas-phase cryogenic material and the solid-phase cryogenic material through the cold of the cold supply medium, The gas-phase cryogenic material in the phase change unit changes phase again due to the cold of the cold heat supply medium, and the pressure inside the phase change unit is reduced during the process of the gas-phase cryogenic material changing phase due to the cold of the cold heat supply medium, The cold / heat circulation unit is a compressor that receives the cold heat supply medium and compresses it; a first heat exchanger that receives the cold heat supply medium compressed by the compressor and recovers heat of compression generated during the compression of the cold heat supply medium; a turbine that receives the cold heat supply medium from which the heat of compression has been recovered in the first heat exchanger, expands the cold heat supply medium, and cools the medium; a second heat exchanger provided in the phase change unit and configured to transfer the cold of the cold supply medium cooled by the turbine to the liquid-phase cryogenic material in the phase change unit; a pressure adjusting unit connected to the phase change unit and configured to selectively adjust an internal pressure of the phase change unit in response to the liquid-phase cryogenic material supplied to the phase change unit; a power supply unit that selectively supplies power to at least one of the heat and cold circulation unit and the pressure adjustment unit; The phase change portion is an inner chamber having a space for receiving the liquid-phase cryogenic material and allowing a phase change of the liquid-phase cryogenic material, the inner chamber having the second heat exchanger disposed therein; an outer chamber provided outside the inner chamber and spaced apart from the inner chamber; At least a portion of the liquid-phase cryogenic substance to which the cold heat of the cold heat supply medium cooled by the turbine has been transferred is vaporized inside the inner chamber by the second heat exchanger; The pressure adjustment unit is a vacuum buffer tank connected to the inner chamber; a vacuum pump connected to the vacuum buffer tank and connected to the power supply unit so as to be selectively supplied with power from the power supply unit.

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