Cryogenic material slush production system

Abstract

The present invention relates to a slush production system for a cryogenic material. The slush production system for the cryogenic material according to an embodiment of the present invention includes: a liquid phase cryogenic material supply unit for storing and supplying a liquid phase cryogenic material; a phase change unit connected to the liquid phase cryogenic material supply unit to receive the liquid phase cryogenic material from the liquid phase cryogenic material supply unit and generating a slush cryogenic material in which the liquid phase cryogenic material and a solid phase cryogenic material are mixed as the liquid phase cryogenic material is phase-changed into a gas phase cryogenic material and the solid phase cryogenic material; and a cold heat circulation unit connected to the phase change unit to supply a cold heat supply medium to the phase change unit and inducing the liquid phase cryogenic material to be phase-changed to the gas phase cryogenic material and the solid phase cryogenic material through cold heat of the cold heat circulation unit; wherein the gas phase cryogenic material of the phase change unit is phase-changed again by the cool heat of the cold heat supply medium, and in a process in which the gas phase cryogenic material is phase-changed by the cool heat of the cold heat supply medium, an inside of the phase change unit is depressurized.

Description

TECHNICAL FIELD

[0001] The present invention relates to a slush production system for a cryogenic material.BACKGROUND

[0002] The world is in an economic structure based on fossil fuels such as petroleum and coal. However, as the world's population increases and each country's economy grows, use of the fossil fuels has rapidly increased, thereby causing problems such as environmental pollution and global warming. In particular, it is necessary to prepare for supply instability of petroleum resources, which are currently the most widely used as an energy source. That is, it is necessary to seek sustainable economic growth while preparing for environmental pollution caused by the use of the fossil fuels and resource weaponization.

[0003] However, since issues of efficient energy use and environmental conservation are organically linked to each other, existing fossil fuels should be used efficiently, and at the same time, clean energy should be used appropriately to solve the problem of energy supply. To this end, research has been highlighted recently on the use of a cryogenic material such as liquid hydrogen and natural gas as the clean energy source rather than the fossil fuels.

[0004] As a part of this research, a method of slushing and storing the cryogenic material has been proposed. A conventional method refers to a freezing and thawing method in which, when a liquid phase cryogenic material is depressurized to near a triple point, a part of the liquid phase cryogenic material is evaporated into a gas phase cryogenic material such as gaseous hydrogen on a surface of the liquid phase cryogenic material, and a temperature of the liquid phase cryogenic material is decreased by latent heat of evaporation generated at this time, so that a solid phase cryogenic material such as solid hydrogen is crystallized on the surface of the liquid phase cryogenic material.

[0005] However, since the freezing and thawing of the liquid phase cryogenic material starts from an upper portion of a heat insulation container, there is a problem that as time passes, the liquid phase cryogenic material in which the freezing and thawing occurred at the upper portion of the heat insulation container is separated from the liquid phase cryogenic material in which the freezing and thawing did not occur at a lower portion of the heat insulation container. Since such a problem acts as a factor that hinders the evaporation of the liquid phase cryogenic material, there is a problem that it is difficult for a solid ratio of a slush cryogenic material generated inside the heat insulation container to increase over a predetermined proportion.

[0006] In order to solve this problem, a stirrer was used to form a vortex inside the heat insulation container to prevent the liquid phase cryogenic material in which the freezing and thawing occurred at the upper portion of the heat insulation container from being separated from the liquid phase cryogenic material in which the freezing and thawing did not occur at the lower portion of the heat insulation container. However, the stirrer is generally a rotating body having a rotating shaft, and there is a problem that a leakage caused by a gap between the rotating shaft and the heat insulation container causes a risk of explosion.

[0007] In addition, a pressure inside the heat insulation container was depressurized to near the triple point by driving a vacuum pump in the related art. However, while a boiling point of a liquid is lowered in a process in which the pressure inside the heat insulation container reaches the triple point by the driving of the vacuum pump, the temperature of the liquid phase cryogenic material is higher than the lowered boiling point and thus, there is a problem that the liquid phase cryogenic material is rapidly vaporized after the driving of the vacuum pump and as a result, the pressure inside the heat insulation container becomes unstable. Furthermore, there is a problem that the gas phase cryogenic material vaporized inside the heat insulation container is discharged to the outside of the heat insulation container through the vacuum pump, thereby causing a loss of a total mass of the cryogenic material.

[0008] Therefore, there is a need for a slush production system for a cryogenic material capable of efficiently producing the slush cryogenic material without the loss of the total mass of the cryogenic material, storing the cryogenic material in a large amount at a higher storage density than before, and stably storing the cryogenic material for a long period of time.SUMMARY TECHNICAL PROBLEM

[0009] The embodiments of the present invention have been devised to solve the above-described conventional problems and is directed to providing of a slush production system for a cryogenic material capable of efficiently producing a slush cryogenic material without a loss of a total mass of the cryogenic material, storing the cryogenic material in a large amount at a higher storage density than before, and stably storing the cryogenic material for a long period of time.TECHNICAL SOLUTION

[0010] According to an aspect of the present invention, it is possible to provide a slush production system for a cryogenic material including a liquid phase cryogenic material supply unit for storing and supplying a liquid phase cryogenic material, a phase change unit connected to the liquid phase cryogenic material supply unit to receive the liquid phase cryogenic material from the liquid phase cryogenic material supply unit, and generating a slush cryogenic material in which the liquid phase cryogenic material and a solid phase cryogenic material are mixed as the liquid phase cryogenic material is phase-changed into a gas phase cryogenic material and the solid phase cryogenic material, and a cold heat circulation unit connected to the phase change unit to supply a cold heat supply medium to the phase change unit, and inducing the liquid phase cryogenic material to be phase-changed into the gas phase cryogenic material and the solid phase cryogenic material through cold heat of the cold heat circulation unit, wherein the gas phase cryogenic material of the phase change unit moves to an upper side from an inside of the phase change unit, and the cold heat circulation unit includes a second heat exchanger provided inside the phase change unit and transferring the cold heat of the cold heat circulation unit to the liquid phase cryogenic material inside the phase change unit, the gas phase cryogenic material moved to the upper side from the inside of the phase change unit is phase-changed again by the cold heat of the cold heat supply medium supplied through the second heat exchanger, and in a process in which the gas phase cryogenic material moved to the upper side form the inside of the phase change unit is phase-changed by the cold heat of the cold heat supply medium supplied through the second heat exchanger, an upper pressure inside the phase change unit is decreased, thereby forming a vacuum at the upper side inside the phase change unit.ADVANTAGEOUS EFFECTS

[0011] According to embodiments of the present invention, there are effects capable of efficiently producing a slush cryogenic material without a loss of a total mass of the cryogenic material, storing the cryogenic material in a large amount at a higher storage density than before, and stably storing the cryogenic material for a long period of time.BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG. 1 is a block diagram showing a slush production system for a cryogenic material according to an embodiment of the present invention. FIG. 2 is a process diagram briefly showing the slush production system for the cryogenic material of FIG. 1. FIG. 3 is a process diagram specifically showing the slush production system for the cryogenic material of FIG. 1. FIG. 4 is a configuration diagram showing a phase change unit of the slush production system for the cryogenic material of FIG. 1. FIG. 5 is a graph for describing a phase change of a liquid phase cryogenic material of the phase change unit of the slush production system using the cryogenic material of FIG. 1. MODE FOR INVENTION

[0013] Hereinafter, specific embodiments for implementing the idea of the present invention will be described in detail with reference to the drawings.

[0014] In addition, when describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

[0015] Additionally, when it is said that a component is 'coupled' or 'connected' to another component, it should be understood that while it may be directly coupled or connected to another component, there may also be other components therebetween.

[0016] The terms used herein are only to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0017] In addition, it is to be noted in advance that the expressions such as one side, the other side, upper side, lower side, etc. in this specification are described based on the diagram shown in the drawing, and may be expressed differently if the direction of the object is changed. For the same reason, some components in the attached drawings are exaggerated, omitted, or schematically illustrated, and the size of each component does not entirely reflect the actual size.

[0018] Additionally, terms that include 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 for the purpose of distinguishing one component from the other.

[0019] The term "include" used in the specification is used to specify specific characteristics, a region, an integer, a step, an operation, a component and / or a composition, and does not exclude any of presence or addition of other specific characteristics, regions, integers, steps, operations, components, composition and / or groups.

[0020] Hereinafter, a specific configuration of a slush production system for a cryogenic material according to an embodiment of the present invention will be described with reference to the drawings.

[0021] Referring to FIGS. 1 to 4, a slush production system 1 for the cryogenic material according to an embodiment of the present invention relates to a slush production system based on Brayton cycle that uses helium (Saturated helium) capable of supplying cold heat as a working fluid and may include a liquid phase cryogenic material supply unit 10, a phase change unit 20, a cold heat circulation unit 30, a pressure adjusting unit 40, and a power supply unit 50.

[0022] The liquid phase cryogenic material supply unit 10 may 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 may include a liquid phase cryogenic material storage container 11.

[0023] The liquid phase cryogenic material storage container 11 may have a storage space in which the liquid phase cryogenic material may be stored. In this case, the liquid phase cryogenic material stored in the liquid phase cryogenic material storage container 11 may include at least one of liquid nitrogen, liquid oxygen, and natural gas, as an example.

[0024] The liquid phase cryogenic material stored in the liquid phase cryogenic material storage container 11 may be transferred to an inner side chamber 21 of the phase change unit 20 described later. To this end, a supply line 211 may be connected between the liquid phase cryogenic material storage container 11 and the inner side chamber 21 of the phase change unit 20 described later. One end portion of the supply line 211 may be connected to the liquid phase cryogenic material storage container 11, and the other end portion of the supply line 211 may be connected to the inner side chamber 21 of the phase change unit 20 described later.

[0025] The phase change unit 20 may be supplied with the liquid phase cryogenic material from the liquid phase cryogenic material supply unit 10. In this case, the liquid phase cryogenic material supplied to the phase change unit 20 may be phase-changed to a gas phase cryogenic material and a solid phase cryogenic material in 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. To this end, the phase change unit 20 may include the inner side chamber 21 and an outer side chamber 22.

[0026] The inner side chamber 21 is a portion where the phase change of the liquid phase cryogenic material supplied from the liquid phase cryogenic material supply unit 10 is substantially performed, and such an inner side chamber 21 may be provided with a material having high tensile strength, low density, and low reactivity with the cryogenic material such as austenitic steel, copper, or aluminum alloy, as an example.

[0027] Meanwhile, a pressure of an inside of the inner side chamber 21 where the phase change of the liquid phase cryogenic material is performed may be adjusted by the pressure adjusting unit 40. For example, when the inside of the inner side chamber 21 is depressurized by the pressure adjusting unit 40 and becomes a vacuum state, the pressure of the liquid phase cryogenic material accommodated inside the inner side chamber 21 may decrease, and the temperature of the liquid phase cryogenic material may decrease. By such a change in pressure and temperature of the liquid phase cryogenic material, the phase change of the liquid phase cryogenic material may be induced. This will be described later.

[0028] The outer side chamber 22 is a chamber provided outside of the inner side chamber 21, and the inner side chamber 21 may be provided inside of the outer side chamber 22. In this case, the outer side chamber 22 may be formed to a size capable of accommodating the inner side chamber 21 therein. Accordingly, an inner side surface of the outer side chamber 22 and an outer side surface of the inner side chamber 21 may be disposed to be spaced apart from each other. Accordingly, heat applied to the outer side chamber 22 may be prevented from being conducted and transferred to the inner side chamber 21, and impact may be prevented from being directly applied to the inner side chamber 21. Such an outer side chamber 22 may be provided with substantially the same material as the inner side chamber 21 as an example.

[0029] Meanwhile, a vacuum line (not shown) may be connected to the outer side chamber 22 so that a separated space between the inner side surface of the outer side chamber 22 and the outer side surface of the inner side chamber 21 become a vacuum state. Thus, when the separated space between the inner side surface of the outer side chamber 22 and the outer side surface of the inner side chamber 21 becomes a vacuum state, vacuum insulation is achieved. Accordingly, the heat applied to the outer side chamber 22 may be prevented from being transferred to the inner side chamber 21 by convection. A vacuum insulation member (not shown) may be provided in the separated space between the inner side surface of the outer side chamber 22 and the outer side surface of the inner side chamber 21. The heat applied to the outer side chamber 22 may be prevented from being transferred to the inner side chamber 21 by such a vacuum insulation member. For example, the vacuum insulation member may be provided as a double shielding material of aerogel or aluminum and glass fiber materials.

[0030] The cold heat circulation unit 30 may continuously supply cold heat to the liquid phase cryogenic material supplied to the phase change unit 20. Thus, the cold heat supplied from the cold heat circulation unit 30 to the phase change unit 20 induces the phase change of the liquid phase cryogenic material of the phase change unit 20 so that the slush cryogenic material in which the liquid phase cryogenic material and the solid phase cryogenic material are mixed may be produced in the phase change unit 20.

[0031] In addition, the cold heat supplied from the cold heat circulation unit 30 to the phase change unit 20 may phase change the gas phase cryogenic material which has been phase-changed from liquid phase cryogenic material again to form a vacuum in the phase change unit 20. In summary, the cold heat provided by the cold heat circulation unit 30 may be utilized not only to supercool the liquid phase cryogenic material and induce slushification of the liquid phase cryogenic material, but also to depressurize an inside of the phase change unit 20 and form a vacuum inside the phase change unit 20.

[0032] To this end, 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 heat 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.

[0033] The compressor 31 may receive the cold heat supply medium and compress the same. The cold heat supply medium compressed in the compressor 31 may be discharged from the compressor 31 and transferred to the first heat exchanger 32 through a first transfer line 321. The compressor 31 may be connected to a fuel cell 51 of a power supply unit 50 described later through a power line 512 and may be driven by being supplied with power from the fuel cell 51. In addition, when a liquid cryogenic fluid supplied to the phase change unit 20 is hydrogen or natural gas as an example, a gas discharged to the fuel cell 51 of the power supply unit 50 described later may bear a part of the power required by the compressor 31.

[0034] The first heat exchanger 32 receives the cold heat supply medium compressed in the compressor 31, and may recover compression heat generated during the process of compressing the cold heat supply medium from the compressor 31.

[0035] The first heat exchanger 32 may heat-exchange the cold heat supply medium discharged from the compressor 31 through the first transfer line 321 and the cold heat supply medium recovered from the second heat exchanger 34 through a recovery line 342. The cold heat supply medium recovered from the second heat exchanger 34 through the recovery line 342 may be heat-exchanged with the cold heat supply medium discharged from the compressor 31 through the first transfer line 321, and then may be supplied to the compressor 31 again to be compressed.

[0036] The turbine 33 may receive the cold heat supply medium from which the compression heat has been recovered at the first heat exchanger 32 and expand and cool the same. The cold heat supply medium supplied from the first heat exchanger 32 to the turbine 33 may have been heat-exchanged with the cold heat supply medium recovered from the second heat exchanger 34 through the recovery line 342. The cold heat supply medium discharged from the turbine 33 may be supplied to the second heat exchanger 34 by the Self Pressure Build Up (Self PBU) method using a heater as an example.

[0037] The cold heat supply medium from which the compression heat has been recovered at the first heat exchanger 32 may be supplied to the turbine 33 through a second transfer line 331 to provide a 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 which has gone through the expansion process in the turbine 33 may be supplied to the second heat exchanger 34 through a third transfer line 341.

[0038] The second heat exchanger 34 may transfer the cold heat of the cold heat supply medium cooled in the turbine 33 to the liquid phase cryogenic material of the phase change unit 20. To this end, the second heat exchanger 34 may be provided inside the phase change unit 20 and as an example, may be provided as a heat exchanger with a spiral tube shape. In addition, the second heat exchanger 34 may be connected to the turbine 33 via the third transfer line 341.

[0039] When the cold heat of the cold heat supply medium is transferred to the liquid phase cryogenic material of the phase change unit 20 through the second heat exchanger 34, the gas phase cryogenic material on an upper portion of the phase change unit 20 may be cooled. When the gas phase cryogenic material is cooled in the upper portion of the phase change unit 20, an average distance between gas molecules increases due to a difference in density caused by a decrease in volume. Accordingly, a pressure of the upper portion of the phase change unit 20 may be decreased, and a vacuum may be formed at the upper portion of the phase change unit 20.

[0040] The cold heat supply medium which has completed heat exchange with the liquid phase cryogenic material inside the phase change unit 20 at the second heat exchanger 34 may be discharged through the recovery line 342 and supplied to the first heat exchanger 32 again. The cold heat supply medium recovered to the first heat exchanger 32 may be heat-exchanged again with the cold heat supply medium discharged to the first heat exchanger 32 from the compressor 31.

[0041] Meanwhile, as the cold heat circulation unit 30 is provided in a closed state and the cold heat supply medium continuously circulates the compressor 31, the first heat exchanger 32, the turbine 33, and the second heat exchanger 34, the cold heat of the cold heat supply medium may be continuously and sufficiently supplied to the phase change unit 20. Accordingly, the gas phase cryogenic material at the upper portion of the phase change unit 20 may be cooled to a temperature below a boiling point by the cold heat of the cold heat supply medium.

[0042] As such, when the gas phase cryogenic material at the upper portion of the phase change unit 20 is sufficiently cooled to a temperature below the boiling point, the vacuum pump 42 of the pressure adjusting unit 40 described later may be driven to prevent the liquid phase cryogenic material inside the phase change unit 20 from rapidly evaporating in the process of depressurizing the phase change unit 20. Furthermore, a loss of a total mass of the slush cryogenic material generated in the phase change unit 20 may be prevented.

[0043] As the pressure adjusting unit 40 may selectively and additionally adjust the pressure of the phase change unit 20 in response to the liquid phase cryogenic material supplied to the phase change unit 20, additional vacuum may be formed in the phase change unit 20. For example, when an amount of heat supplied to the phase change unit 20 according to the liquid phase cryogenic material is insufficient, the pressure adjusting unit 40 may be driven so that the inside of the phase change unit 20 is depressurized.

[0044] As such, when the inside of the phase change unit 20 is depressurized 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, so that a slush cryogenic material in which the liquid phase cryogenic material and the solid phase cryogenic material are mixed in the phase change unit 20 may be produced. To this end, the pressure adjusting unit 40 may be connected to the phase change unit 20 and may include a vacuum buffer tank 41 and the vacuum pump 42.

[0045] The vacuum buffer tank 41 may be provided as a buffer tank in which a medium vacuum is formed as an example. Such a vacuum buffer tank 41 may be connected to the inner side chamber 21 via a first vacuum line 411 and may be connected to the vacuum pump 42 via a second vacuum line 412.

[0046] The vacuum pump 42 may be connected to the inner side chamber 21. The vacuum pump 42 may decrease the pressure of the liquid phase cryogenic material accommodated in the inner side chamber 21 by depressurizing the inside of the inner side chamber 21 and decrease the temperature of the liquid phase cryogenic material.

[0047] When the pressure inside the inner side chamber 21 is decreased by the vacuum pump 42 and a vacuum is formed inside the inner side chamber 21, the liquid phase cryogenic material accommodated inside the inner side chamber 21 may be evaporated. In this case, as the temperature of the liquid phase cryogenic material decreases due to the generated latent heat of evaporation, the liquid phase cryogenic material may be solidified.

[0048] In this case, the vacuum pump 42 may be connected to the fuel cell 51 of the power supply unit 50 described later through a power line 511. Accordingly, the vacuum pump 42 may be supplied with power from the fuel cell 51 of the power supply unit 50 described later. This will be described later.

[0049] The power supply unit 50 may selectively supply power to at least one of the cold heat circulation unit 30 and the pressure adjusting unit 40. In other words, the power supply unit 50 may produce electricity required to drive at least one of the cold heat circulation unit 30 and the pressure adjusting unit 40.

[0050] To this end, the power supply unit 50 may be provided with 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. Accordingly, the electricity produced in the fuel cell 51 may be used as a driving source for the vacuum pump 42 or as a driving source for the compressor 31.

[0051] Hereinafter, with reference to FIG. 5, a graph is shown to describe the phase change of the liquid phase cryogenic material of the phase change unit 20.

[0052] Referring to FIG. 5, since a liquid-gas coexistence line is a lower left-upper right curve, the pressure of the liquid phase cryogenic material decreases and the temperature also decreases as it goes from a first point A on the liquid-gas coexistence line, that is, from a point having a first temperature T1 and a first pressure P1 to a second point B, that is, through a point having a second temperature T2 and a second pressure P2 and to a third point C, that is, to a point having a third temperature T3 and a third pressure P3.

[0053] In particular, when the liquid phase cryogenic material reaches the third point C, that is, a triple point, the liquid phase cryogenic material may be phase-changed to the solid phase cryogenic material. In other words, even when the liquid phase cryogenic material supplied from the liquid phase cryogenic material supply unit 10 to the phase change unit 20 is evaporated, the liquid phase cryogenic material may not deviate from the liquid-gas coexistence line. Therefore, even when the pressure of the inner side chamber 21 accommodating the liquid phase cryogenic material is decreased by the supply of the cold heat supply medium and / or the driving of the vacuum pump 42 and the temperature of the liquid phase cryogenic material is decreased, the liquid phase cryogenic material and the gas phase cryogenic material coexist inside the inner side chamber 21 until all of liquid phase cryogenic material accommodated in the inner side chamber 21 are changed to the gas phase cryogenic material. In such a state, when the temperature T3 of the liquid phase cryogenic material reaches the triple point, as the liquid phase cryogenic material changes to the solid phase cryogenic material, the slush cryogenic material in which the liquid phase cryogenic material and the solid phase cryogenic material are mixed may be generated inside the inner side chamber 21.

[0054] The slush production system 1 for the cryogenic material having the above-described configuration continuously supplies the cold heat of the helium to the phase change unit 20 on the basis of the Brayton cycle using helium as a working fluid to liquefy the gas phase cryogenic material into the cold heat of the helium in the phase change unit 20, thereby decreasing the internal pressure of the phase change unit 20 and forming a vacuum inside the phase change unit 20. Accordingly, a phenomenon of rapid evaporation of the gas phase cryogenic material is prevented, thereby having an effect of being able to more efficiently produce the slush cryogenic material without the loss of the total mass of the cryogenic material than before.

[0055] In addition, since the slushed cryogenic material may be densified by solid particles, there is an effect that the cryogenic material may be stored in a large amount at a higher storage density than before.

[0056] Further, when the slushed cryogenic material is transported through a separate pipe, as heat infiltrating from the outside is absorbed as heat of fusion of the solid particles, the temperature increase of the liquid phase cryogenic material is reduced, thereby reducing generation of evaporation gas and stably storing the cryogenic material for a long time than before.

[0057] Although the embodiments of the present invention have been described as specific embodiments, it is merely an example, and the present invention is not limited thereto and it should be interpreted to have the broadest scope in accordance with the basic idea disclosed in this specification. Those skilled in the art may combine / substitute the disclosed embodiments to implement patterns of shapes not specified, but this also does not depart from the scope of the present invention. In addition, those skilled in the art may easily change or modify the disclosed embodiments based on this specification, and it is clear that such changes or modifications also fall within the scope of the present invention.

Claims

1. A slush production system for a cryogenic material comprising: a liquid phase cryogenic material supply unit for storing and supplying a liquid phase cryogenic material; a phase change unit connected to the liquid phase cryogenic material supply unit to receive the liquid phase cryogenic material from the liquid phase cryogenic material supply unit and generating a slush cryogenic material in which the liquid phase cryogenic material and a solid phase cryogenic material are mixed as the liquid phase cryogenic material is phase-changed into a gas phase cryogenic material and the solid phase cryogenic material; and a cold heat circulation unit connected to the phase change unit to supply a cold heat supply medium to the phase change unit and inducing the liquid phase cryogenic material to be phase-changed into the gas phase cryogenic material and the solid phase cryogenic material through cold heat of the cold heat circulation unit; wherein the gas phase cryogenic material of the phase change unit moves to an upper side from an inside of the phase change unit, the cold heat circulation unit includes a second heat exchanger provided inside the phase change unit and transferring the cold heat of the cold heat circulation unit to the liquid phase cryogenic material inside the phase change unit, the gas phase cryogenic material moved to the upper side from the inside of the phase change unit is phase-changed again by the cold heat of the cold heat supply medium supplied through the second heat exchanger, and in a process in which the gas phase cryogenic material moved to the upper side from the inside of the phase change unit is phase-changed by the cold heat of the cold heat supply medium supplied through the second heat exchanger, an upper pressure inside the phase change unit is decreased, thereby forming a vacuum at the upper side inside the phase change unit.

2. The slush production system for a cryogenic material of claim 1, wherein the cold heat circulation unit further includes a compressor that receives the cold heat supply medium and compresses the same, a first heat exchanger that receives the cold heat supply medium compressed in the compressor and recovers compression heat generated during a process of compressing the cold heat supply medium, and a turbine that receives the cold heat supply medium from which the compression heat has been recovered from the first heat exchanger and expands and cools the same, wherein the heat exchanger is connected to the turbine and receives the cold heat of the cold heat supply medium that is cooled in the turbine.

3. The slush production system for a cryogenic material of claim 2, wherein the cold heat circulation unit further includes a recovery line connected between the first heat exchanger and the second heat exchanger, and the cold heat supply medium that has completed a cold heat transfer to the liquid phase cryogenic material at the second heat exchanger is transferred to the first heat exchanger through the recovery line.

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

5. The slush production system for a cryogenic material of claim 4, further comprising a power supply unit that selectively supplies power to at least one of the cold heat circulation unit and the pressure adjusting unit.

6. A slush production system for a cryogenic material comprising: a liquid phase cryogenic material supply unit for storing and supplying a liquid phase cryogenic material; a phase change unit connected to the liquid phase cryogenic material supply unit to receive the liquid phase cryogenic material from the liquid phase cryogenic material supply unit and generating a slush cryogenic material in which the liquid phase cryogenic material and a solid phase cryogenic material are mixed as the liquid phase cryogenic material is phase-changed into a gas phase cryogenic material and the solid phase cryogenic material; and a cold heat circulation unit connected to the phase change unit to supply a cold heat supply medium to the phase change unit and inducing the liquid phase cryogenic material to be phase-changed into the gas phase cryogenic material and the solid phase cryogenic material through cold heat of the cold heat supply medium; wherein the gas phase cryogenic material of the phase change unit is phase-changed again by the cool heat of the cold heat supply medium, and in a process in which the gas phase cryogenic material is phase-changed by the cool heat of the cold heat supply medium, an inside of the phase change unit is depressurized, wherein the cold heat circulation unit includes: a compressor that receives the cold heat supply medium and compresses the same; a first heat exchanger that receives the cold heat supply medium compressed in the compressor and recovers compression heat generated during a process of compressing the cold heat supply medium; a turbine that receives the cold heat supply medium from which the compression heat has been recovered at the first heat exchanger and expands and cools the same; and a second heat exchanger provided at the phase change unit and transferring the cold heat of the cold heat supply medium cooled by the turbine to the liquid phase cryogenic material inside the phase change unit, the cold heat circulation unit further includes a recovery line connected between the first heat exchanger and the second heat exchanger, and the cold heat supply medium that has completed a cold heat transfer to the liquid phase cryogenic material at the second heat exchanger is transferred to the first heat exchanger through the recovery line, wherein the slush production system for a cryogenic material further comprising a power supply unit that selectively supplies power to at least one of the cold heat circulation unit and the pressure adjusting unit, wherein the phase change unit includes an inner side chamber providing a space in which the liquid phase cryogenic material is accommodated and a phase change of the liquid phase cryogenic material is performed and in which the second heat exchanger is disposed, and an outer side chamber provided outside of the inner side chamber and disposed to be spaced apart from the inner side chamber, wherein at least a part of the liquid phase cryogenic material to which cold heat of the cold heat supply medium cooled in the turbine is transferred is vaporized inside the inner side chamber by the second heat exchanger.

7. A slush production system for a cryogenic material comprising: a liquid phase cryogenic material supply unit for storing and supplying a liquid phase cryogenic material; a phase change unit connected to the liquid phase cryogenic material supply unit to receive the liquid phase cryogenic material from the liquid phase cryogenic material supply unit and generating a slush cryogenic material in which the liquid phase cryogenic material and a solid phase cryogenic material are mixed as the liquid phase cryogenic material is phase-changed into a gas phase cryogenic material and the solid phase cryogenic material; and a cold heat circulation unit connected to the phase change unit to supply a cold heat supply medium to the phase change unit and inducing the liquid phase cryogenic material to be phase-changed into the gas phase cryogenic material and the solid phase cryogenic material through cold heat of the cold heat supply medium; wherein the gas phase cryogenic material of the phase change unit is phase-changed again by the cool heat of the cold heat supply medium, and in a process in which the gas phase cryogenic material is phase-changed by the cool heat of the cold heat supply medium, an inside of the phase change unit is depressurized, wherein the cold heat circulation unit further includes: a compressor that receives the cold heat supply medium and compresses the same; a first heat exchanger that receives the cold heat supply medium compressed in the compressor and recovers compression heat generated during a process of compressing the cold heat supply medium; a turbine that receives the cold heat supply medium from which the compression heat has been recovered at the first heat exchanger and expands and cools the same; and a second heat exchanger provided at the phase change unit and transferring the cold heat of the cold heat supply medium cooled by the turbine to the liquid phase cryogenic material inside the phase change unit, wherein the slush production system for a cryogenic material further comprising a pressure adjusting unit connected to the phase change unit and selectively and additionally adjusting an internal pressure of the phase change unit in response to the liquid phase cryogenic material supplied to the phase change unit, and a power supply unit that selectively supplies power to at least one of the cold heat circulation unit and the pressure adjusting unit, wherein the phase change unit includes an inner side chamber providing a space in which the liquid phase cryogenic material is accommodated and a phase change of the liquid phase cryogenic material is performed and in which the second heat exchanger is disposed, and an outer side chamber provided outside of the inner side chamber and disposed to be spaced apart from the inner side chamber, wherein at least a part of the liquid phase cryogenic material to which cold heat of the cold heat supply medium cooled in the turbine is transferred is vaporized inside the inner side chamber by the second heat exchanger, wherein the pressure adjusting unit includes a vacuum buffer tank connected to the inner side chamber, and a vacuum pump connected to the vacuum buffer tank and connected to the power supply unit to be selectively supplied with power from the power supply unit.

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