KR102476792B1 - System and method for regulating pressure in cryogenic fuel tank - Google Patents

Abstract

A cryogenic fuel tank pressure control system according to an embodiment according to the technical idea of the present invention includes a cryogenic fuel tank including an inner tank and an outer tank surrounding the inner tank with a vacuum section spaced apart therebetween; Cryogenic liquid fuel discharge unit for discharging the cryogenic liquid fuel from the inner tank to the outside of the outer tank; and a heat conducting member configured to connect the inner surface of the outer shell and the outer surface of the inner shell to transfer heat from the outer shell to the inner shell, wherein the heat transferred from the outer shell raises the temperature of the inner shell, thereby increasing the pressure of the inner shell, thereby increasing the cryogenic liquid fuel. may be discharged from the inner tank to the outside of the outer tank.

Description

System and method for regulating pressure in cryogenic fuel tank}

The present invention relates to a cryogenic fuel tank pressure control system and method, and more particularly, to a cryogenic fuel tank composed of an inner tank and an outer tank by adjusting the temperature of the inner tank to adjust the pressure of the inner tank to discharge the cryogenic liquid fuel. A fuel tank pressure regulating system and method.

In the case of a conventional cryogenic fuel supply system (eg, LNG fuel supply system), fuel is supplied by boosting the pressure of liquid droplets in a fuel tank through a cryogenic pump or a pressure build-up unit (PBU).

The cryogenic pump has a simple configuration, but due to low reliability, high repair cost, repair time and price of the cryogenic pump, the PBU system has been introduced for small-capacity fuel supply devices.

The PBU system draws out a small amount of liquid droplets, heats them, boosts them, and supplies them to the fuel tank again to boost the pressure in the tank to the delivery pressure. To this end, since a small pressure vessel including an electric heater is required in addition to the fuel tank, additional power is consumed and volumetric efficiency is lowered.

Accordingly, inventors have made many studies to solve these problems, but satisfactory results have not yet been produced.

A cryogenic fuel tank pressure control system and method according to the technical idea of the present invention controls the temperature of an inner tank of a cryogenic fuel tank composed of an inner tank and an outer tank using a variable-length conductor located between the inner tank and the outer tank, thereby controlling the pressure of the inner tank to achieve a cryogenic temperature. It is to provide a cryogenic fuel tank pressure control system and method for discharging liquid fuel.

Technical tasks to be achieved by the cryogenic fuel tank pressure control system and method according to the technical idea of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

A cryogenic fuel tank pressure control system according to an embodiment according to the technical idea of the present invention includes a cryogenic fuel tank including an inner tank and an outer tank surrounding the inner tank with a vacuum section spaced apart therebetween; Cryogenic liquid fuel discharge unit for discharging the cryogenic liquid fuel from the inner tank to the outside of the outer tank; and a heat conducting member configured to connect the inner surface of the outer shell and the outer surface of the inner shell to transfer heat from the outer shell to the inner shell, wherein the heat transferred from the outer shell raises the temperature of the inner shell, thereby increasing the pressure of the inner shell, thereby increasing the cryogenic liquid fuel. may be discharged from the inner tank to the outside of the outer tank.

The heat conducting member is provided so as to be spaced apart from the inner surface of the outer shell or the outer surface of the inner shell that is opposed to at least one selected from the outer surface of the inner shell or the inner surface of the outer shell, and to increase the pressure of the inner shell, the heat conductive member is It may further include a control unit for controlling the contact with the inner surface of the outer tub or the outer surface of the inner tub, which are opposed to each other.

The heat conduction member may include a first heat conduction member provided at an upper portion of the fuel tank in a vertical direction and heating the cryogenic gas fuel accommodated in the inner tank.

The heat conduction member further includes a second heat conduction member provided at a lower portion of the fuel tank in a vertical direction to heat the cryogenic liquid fuel accommodated in the inner tank, and the control unit considers a required pressure value and time of the inner tank. Thus, operations of the first heat conducting member and the second heat conducting member may be controlled.

The heat conducting member includes a first electromagnet member connected to an outer surface of the inner tub; a second electromagnet member positioned to be in contact with or spaced apart from the first electromagnet member; a second electromagnet member guide connected to the outer surface of the inner tub and being a tubular member surrounding the first electromagnet member and the second electromagnet member; a third electromagnet member connected to the inner surface of the outer shell; a fourth electromagnet member positioned to be in contact with or spaced apart from the third electromagnet member; a fourth electromagnet member guide connected to the inner surface of the outer tub and being a tubular member surrounding the third electromagnet member and the fourth electromagnet member; and an electromagnet control unit supplying current to the first electromagnet member, the second electromagnet member, the third electromagnet member, and the fourth electromagnet member to generate polarity, wherein the second electromagnet member moves vertically along the second electromagnet member guide. The fourth electromagnet member moves up and down along the fourth electromagnet member guide, and the electromagnet controller forms opposite polarities on opposite surfaces of the first electromagnet member and the second electromagnet member when heat is not supplied to the inner tank, Opposite polarities are formed on the facing surfaces of the third electromagnet member and the fourth electromagnet member, and the same polarity is formed on the facing surfaces of the second electromagnet member and the fourth electromagnet member, thereby forming the second electromagnet member and the fourth electromagnet member. When heat is supplied to the inner tank, the same polarity is formed on the facing surfaces of the first electromagnet member and the second electromagnet member, and the same polarity is formed on the facing surfaces of the third electromagnet member and the fourth electromagnet member. The second electromagnet member and the fourth electromagnet member may be brought into contact by forming opposite polarities on opposite surfaces of the second electromagnet member and the fourth electromagnet member.

The electromagnet controller may supply current to the second electromagnet member through the second electromagnet member guide and supply current to the fourth electromagnet member through the fourth electromagnet member guide.

The first electromagnet member may be spaced apart from the second electromagnet member guide, and the third electromagnet member may be spaced apart from the fourth electromagnet member guide.

The second electromagnet member and the fourth electromagnet member are cylindrical members, and include a second protruding guide part and a fourth protruding guide part protruding at predetermined intervals along the outer circumferential surface, wherein the second protruding guide part and the fourth protruding guide part are cylindrical. It is a rail-like member extending in the longitudinal direction, the second electromagnet member guide and the fourth electromagnet member guide are cylindrical members, and the second electromagnet member guide and the fourth electromagnet member guide have second protruding guide parts and fourth protruding guides on inner circumferential surfaces. A second concave guide part and a fourth concave guide part are inserted, the second concave guide part and the fourth concave guide part are groove-shaped members extending in the lengthwise direction of the cylinder, and the second protruding guide part and the second protruding guide part are respectively It can slide along the second concave guide part and the fourth concave guide part.

The cryogenic fuel tank pressure control system may further include a heater disposed on an outer surface of the outer shell and heating the outer shell of the outer shell equipped with the heat conducting member or the heat conducting member.

A method for regulating the pressure of a cryogenic fuel tank according to an embodiment according to the technical idea of the present invention includes connecting a heat conducting member located on an inner surface of an outer tank and spaced apart from the outer surface of the inner tank to the outer surface of the inner tank; and transferring heat to a heat conducting member connecting an inner surface of the outer shell and an outer surface of the inner shell.

According to one embodiment according to the technical idea of the present invention, a computer readable medium recording a program for regulating the pressure of a cryogenic fuel tank is located on an inner surface of an outer tank and is spaced apart from the outer surface of the inner tank. connecting the outer surface of the inner tub; and a computer readable medium recording a program for executing a step of transferring heat to a heat conducting member connecting the inner surface of the outer shell and the outer surface of the inner shell.

A cryogenic fuel tank pressure control system and method according to embodiments according to the technical concept of the present invention controls the temperature of an inner tank of a cryogenic fuel tank composed of an inner tank and an outer tank using a variable-length conductor positioned between the inner tank and the outer tank, thereby reducing the temperature of the inner tank. The cryogenic liquid fuel can be discharged by adjusting the pressure.

The cryogenic fuel tank pressure control system and method according to embodiments according to the technical concept of the present invention can boost and deliver cryogenic fuel without a cryogenic pump or an external PBU system, significantly reducing initial investment costs and operating costs, Compared to the PBU system, the volumetric efficiency can be greatly improved.

The cryogenic fuel tank pressure control system and method according to embodiments according to the technical idea of the present invention can maximize space utilization by reducing the number of parts and secure price competitiveness.

However, effects that can be achieved by the cryogenic fuel tank pressure control system and method according to an embodiment of the present invention are not limited to those mentioned above, and other effects not mentioned will be disclosed to those skilled in the art from the description below. will be clearly understood.

In order to more fully understand the drawings cited herein, a brief description of each drawing is provided.
1 is a schematic diagram of a cryogenic fuel tank pressure regulating system according to one embodiment of the present invention.
2 is a cross-sectional view of a heat conduction member used in a cryogenic fuel tank according to an embodiment of the present invention.
3 is a plan view of a heat conduction member used in a cryogenic fuel tank according to an embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail through detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that the present invention includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, numbers (eg, 1st, 2nd, etc.) used in the description process of this specification are only identifiers for distinguishing one component from another component.

In addition, in this specification, when one component is referred to as “connected” or “connected” to another component, the one component may be directly connected or directly connected to the other component, but in particular Unless otherwise described, it should be understood that they may be connected or connected via another component in the middle.

In addition, in the present specification, components expressed as '~ part' may be two or more components combined into one component, or one component may be differentiated into two or more for each more subdivided function. In addition, each of the components to be described below may additionally perform some or all of the functions of other components in addition to its own main function, and some of the main functions of each component may be different from other components. Of course, it may be performed exclusively by a component.

Hereinafter, embodiments according to the technical idea of the present invention will be described in detail in turn.

1 is a schematic diagram of a cryogenic fuel tank pressure regulating system according to one embodiment of the present invention. 2 is a cross-sectional view of a heat conduction member used in a cryogenic fuel tank according to an embodiment of the present invention. 3 is a plan view of a heat conduction member used in a cryogenic fuel tank according to an embodiment of the present invention.

The cryogenic fuel tank pressure control system according to an embodiment of the present invention may include a cryogenic fuel tank 10 , a hydrogen gas outlet 120 , a heat conduction member 230 , and a heater 150 .

The cryogenic fuel tank 10 is composed of an inner tank 20 and an outer tank 30, a vacuum section 22 is formed at a predetermined interval between the inner tank 20 and the outer tank 30, and the outer tank 30 is the inner tank ( 20) has a structure surrounding it. Due to this vacuum section 22, an insulating effect is generated between the inner tub 20 and the outer tub 30.

Cryogenic liquid fuel and cryogenic gas fuel may be accommodated in the inner tank 20 , and the cryogenic gas fuel may be generated by vaporizing the cryogenic liquid fuel. Since the cryogenic liquid fuel is used as the fuel of the power unit in the cryogenic fuel tank pressure control system, the cryogenic liquid fuel in the inner tank 20 is discharged through the cryogenic liquid fuel discharge unit 120 .

The cryogenic liquid fuel discharge unit 120 includes a tubular structure that communicates the lower portion of the inner tub 20 and the outside of the outer circumference 30 in order to discharge the cryogenic liquid fuel from the inner tub 20 to the outside of the outer tub 30. can do. Cryogenic liquid fuel discharge unit 120 is formed at the bottom, the discharge of the cryogenic gaseous fuel is prevented, only the cryogenic liquid fuel can be discharged.

In order to discharge the cryogenic liquid fuel, the temperature of the fluid in the inner tank is raised to increase the internal pressure, and by this increased pressure, the cryogenic gas fuel pushes the cryogenic liquid fuel to the cryogenic liquid fuel discharge unit 120, so that the cryogenic liquid fuel It can be discharged to the outside of the outer tub (30). To this end, a means for heating the inner tub 20 is required.

The heat conducting member 230 is configured to connect the inner surface 31 of the outer tub 30 and the outer surface 21 of the inner tub 20 to transfer heat from the outer tub 30 to the inner tub 20 . At least one heat conducting member 230 is provided on the outer surface 21 of the inner tub 20, and is provided to be spaced apart from the inner surface 31 of the outer tub 30 facing the outer tub 30, or on the inner surface 31 of the outer tub 30. It is provided, but may be provided to be spaced apart from the outer surface 21 of the opposing inner tub 20 . In addition, two or more heat conducting members 230 are provided on the outer surface 21 of the inner tub 20 and the inner surface 31 of the outer tub 30, and the outer surface 21 of the inner tub 20 and the inner surface of the outer tub 30 ( 31) may be provided to be spaced apart from the inner surface 31 of the outer tub 30 and the outer surface 21 of the inner tub 20, respectively.

In order to increase the pressure of the inner tub 20, the control unit (not shown) controls the inner surface 31 of the outer tub 30 and/or the outer surface 21 of the inner tub 20 facing each other, where the heat conducting member 230 is spaced apart. ) can be controlled so that the heat conducting member 230 is in contact with.

The heater 150 is located on the outer surface of the outer tub 30 and heats the heat conducting member 230, and the heat generated by the heater 150 is conducted to the inner tub 20 through the heat conducting member 230. . As the heater, various known means capable of generating heat and conducting heat transfer may be used. For example, a configuration in which heat is generated by supplying current to a resistor may be used.

Meanwhile, when conduction heat is transferred to the inner tub 20 through the heat conducting member 230 , ice may be formed on the outer surface of the outer tub 30 , which loses heat to the inner tub 20 . In order to prevent this, the heater 150 may indirectly heat the heat conducting member 230 attached to the inner surface 31 of the outer tub 30 by heating the outside of the outer tub 30 equipped with the heat conducting member 230. there is. By this heating method, it is possible to prevent ice from being formed on the outer surface of the outer tub 30 in which the heat conducting member 230 is installed.

The heat transferred from the outer tank 30 raises the temperature of the inner tank 20, thereby increasing the pressure of the inner tank 20 to expand the cryogenic gaseous fuel or vaporize the cryogenic liquid fuel, and the vaporized and expanded cryogenic gaseous fuel The cryogenic liquid fuel may be pushed from the inner tub 20 to the outside of the outer tub 30 .

The heat conducting member 230 may include at least one first heat conducting member provided in the vacuum section 22 of the upper part in the vertical direction of the fuel tank to heat the cryogenic gaseous fuel accommodated in the inner tank 20. The method of adjusting the internal pressure of the inner tank 20 by heating the cryogenic gas fuel region by the first heat conducting member has high thermal efficiency and enables precise control of temperature and pressure.

In addition, the heat conducting member 230 may include at least one second heat conducting member provided in the vacuum section 22 of the lower part in the vertical direction of the fuel tank to heat the cryogenic liquid fuel accommodated in the inner tank 20. . The method of adjusting the internal pressure of the inner tank 20 by heating the cryogenic liquid fuel region by the second heat conducting member can shorten the pressure rising time by rapidly increasing the boil off gas (BOG).

Here, the controller may control the operation of the first heat conducting member and/or the second heat conducting member in consideration of the required pressure value and time of the inner tub 20 .

As an example of the heat conduction member 230 shown in FIG. 1 , a heat conduction control unit (not shown) performs linear motion in the vacuum section 22 between the inner tub 20 and the outer tub 30 or has a variable length. Thus, contact between the inner tub 20 and the outer tub 30 can be turned on/off. A plurality of heat conducting members 230 may be arranged along the inner tub 20 .

When fuel consumption is small or nonexistent, the off mode is entered. In this case, the heat conduction member 230 is separated from the inner tub 20 and heat conduction through the heat conduction member 230 may be blocked. In addition, when fuel consumption increases (normal driving), one or more heat conduction members 230 may contact the inner tub 20 to induce heat inflow from the outside for heat conduction. Heat input can be controlled according to the pressure inside the fuel tank and the required fuel delivery rate. That is, as the pressure inside the fuel tank increases, stable fuel supply can be achieved.

For example, the T-shaped heat conducting member 230 of FIG. 1 may move in the direction of an arrow to come into contact with or be separated from the inner tub 20 . When the T-shaped heat conducting member 230 is separated from the inner tub 20, the heat generated by the heater 150 is blocked from being transferred to the inner tub 20, and the T-shaped heat conducting member 230 connects to the inner tub 20. Upon contact, heat generated by the heater 150 is transferred to the inner tub 20 .

Another structure of the heat conducting member 230 is shown in FIGS. 2 and 3 . The heat conducting member 230 includes a first electromagnet member 231, a second electromagnet member 232, a second electromagnet member guide 241, a third electromagnet member 233, a fourth electromagnet member 234, and a fourth electromagnet. It may include a member guide 242 and an electromagnet controller (not shown).

The first electromagnet member 231 is connected to the outer surface 21 of the inner tub 20 , and the second electromagnet member 232 may be in contact with or spaced apart from the first electromagnet member 231 . Here, the first electromagnet member 231 and the second electromagnet member 232 may have various pillar shapes such as a cylinder, a square pillar, and a triangular pillar.

The third electromagnet member 233 is connected to the inner surface 31 of the outer tub 30, and the fourth electromagnet member 234 may be placed in contact with or spaced apart from the third electromagnet member 233. Here, the third electromagnet member 233 and the fourth electromagnet member 234 may have various pillar shapes such as a cylinder, a square pillar, and a triangular pillar.

The first electromagnet member 231, the second electromagnet member 232, the third electromagnet member 233, and the fourth electromagnet member 234 have polarities at both ends as current is applied, and have positive poles according to the direction of the current. The current applied to the second electromagnet member 232 and the fourth electromagnet member 234 may be transmitted through the second electromagnet member guide 241 and the fourth electromagnet member guide 242 .

The first electromagnet member 231 is spaced apart from the second electromagnet member guide 241, and the third electromagnet member 233 is spaced apart from the fourth electromagnet member guide 242. Currents applied to the first electromagnet member 231 and the third electromagnet member 233 are formed on the inner tub 20 and the outer tub 30, respectively, and the second electromagnet member guide 241 and the fourth electromagnet member guide ( 242) and can be delivered in a separate path.

The second electromagnet member guide 241 is a tubular member connected to the outer surface 21 of the inner tub 20 and surrounding the second electromagnet member 232, and the second electromagnet member 232 is the second electromagnet member guide 241 ), and may be made of a metal material. The inner surface of the second electromagnet member guide 241 remains in contact with the outer surface of the second electromagnet member 232, and thus the second electromagnet member guide 241 transmits heat and current to the second electromagnet member 232. can be conveyed

The fourth electromagnet member guide 242 is a tubular member connected to the inner surface 31 of the outer shell 30 and surrounding the fourth electromagnet member 234, and the fourth electromagnet member 234 is the fourth electromagnet member guide 242 ), and may be made of a metal material. The inner surface of the fourth electromagnet member guide 242 remains in contact with the outer surface of the fourth electromagnet member 234, and thus the fourth electromagnet member guide 242 transmits heat and current to the fourth electromagnet member 234. can be conveyed

As shown in FIG. 3, the second electromagnet member 232 and the fourth electromagnet member 234 may be cylindrical members, and second protruding guide parts 236 protruding at predetermined intervals along the outer circumferential surface, and It may include fourth protruding guide parts 237 . Here, the second protruding guide part 236 and the fourth protruding guide part 237 may be rail-like members extending in the lengthwise direction of the cylinder of the second electromagnet member 232 and the fourth electromagnet member 234 .

The second electromagnet member guide 241 and the fourth electromagnet member guide 242 respectively corresponding to the second electromagnet member 232 and the fourth electromagnet member 234 may be cylindrical members, and the second electromagnet member guide 241 ) And the fourth electromagnet member guide 242 includes second concave guide parts 246 and fourth concave guide parts 246 into which the second protruding guide parts 236 and the fourth protruding guide parts 237 are inserted on the inner circumferential surface ( 247) may be included. Here, the second concave guide part 246 and the fourth concave guide part 247 may be groove-shaped members extending in the cylindrical length direction of the second electromagnet member guide 241 and the fourth electromagnet member guide 242 .

The second protruding guide part 236 and the fourth protruding guide part 237 may slide along the second concave guide part 246 and the fourth concave guide part 247 , respectively. Accordingly, as shown in FIG. 2 , the second electromagnet member 232 and the fourth electromagnet member 234 maintain a horizontal state and can perform linear motion with each other, and when in contact with each other, face-to-face contact without lifting. It can be.

The electromagnet controller may generate polarity by supplying current to the second electromagnet member 232 and the fourth electromagnet member 234 through the second electromagnet member guide 241 and the fourth electromagnet member guide 242 . In addition, polarity may be generated by supplying current to the first electromagnet member 231 and the third electromagnet member 233.

When heat is supplied to the inner tub 20, the electromagnet controller forms the same polarity on the facing surfaces of the first electromagnet member 231 and the second electromagnet member 232, and the third electromagnet member 233 and the fourth electromagnet The same polarity is formed on the facing surfaces of the member 234, and opposite polarities are formed on the facing surfaces of the second electromagnet member 232 and the fourth electromagnet member 234, so that the second electromagnet member 232 and the second electromagnet member 232 have the same polarity. 4. The second electromagnet member 232 and the fourth electromagnet member 234 are brought into contact with each other by attracting the electromagnet members 234 to each other.

The heat generated by the heater 150 is transferred to the fourth electromagnet member 234 through the fourth electromagnet member guide 242, and then passes through the second electromagnet member 232 to the second electromagnet member guide 241. delivered to the inner tub 20 through

When heat is not supplied to the inner tub 20, the electromagnet controller forms opposite polarities on the facing surfaces of the first electromagnet member 231 and the second electromagnet member 232, and the third electromagnet member 233 and the second electromagnet member 233 Opposite polarities are formed on the facing surfaces of the 4 electromagnet members 234, and the same polarity is formed on the facing surfaces of the second electromagnet member 232 and the fourth electromagnet member 234, so that the second electromagnet member 232 And the fourth electromagnet member 234 can be pushed to each other to create a spaced state.

A method for adjusting the pressure of a cryogenic fuel tank according to an embodiment of the present invention may be performed in the following steps.

A step of connecting the heat conducting member 230 located on the inner surface 31 of the outer tub 30 and spaced apart from the outer surface 21 of the inner tub 20 with the outer surface 21 of the inner tub 20 may be performed. there is.

Subsequently, a step of transferring heat to the heat conducting member 230 connecting the inner surface 31 of the outer tub 30 and the outer surface 21 of the inner tub 20 may be performed.

The heat transferred from the outer tank 30 raises the temperature of the inner tank 20, thereby increasing the pressure of the inner tank 20 to expand the cryogenic gaseous fuel or vaporize the cryogenic liquid fuel, and the vaporized and expanded cryogenic gaseous fuel The cryogenic liquid fuel may be pushed from the inner tub 20 to the outside of the outer tub 30 .

A computer-readable medium recording a program according to an embodiment of the technology disclosed in this specification is a computer-readable medium recording a program for controlling the pressure of a cryogenic fuel tank, and (a) connecting the heat conducting member 230 located on the inner surface 31 and spaced apart from the outer surface 21 of the inner tub 20 to the outer surface 21 of the inner tub 20; and (b) transferring heat to the heat conducting member 230 connecting the inner surface 31 of the outer shell 30 and the outer surface 21 of the inner shell 20. A computer-readable medium recording a program for executing the step. can be

The functional operations described in this specification and the embodiments related to the present subject matter can be implemented in digital electronic circuits, computer software, firmware, or hardware, including the structures disclosed in this specification and their structural equivalents, or in a combination of one or more of them. Do.

Embodiments of the subject matter described herein are directed to one or more computer program products, namely one or more modules of computer program instructions encoded on a tangible program medium for execution by or controlling the operation of a data processing device. can be implemented A tangible program medium may be a computer readable medium. The computer-readable medium may be a machine-readable storage device, a machine-readable storage substrate, or a memory device.

A computer program (also known as a program, software, software application, script or code) may be written in any form of programming language, including compiled or interpreted language, a priori or procedural language, and may be a stand-alone program or module; It may be deployed in any form including components, subroutines, or other units suitable for use in a computer environment.

A computer program does not necessarily correspond to a file in a file system. A program may be in a single file provided to the requested program, or in multiple interacting files (e.g., one or more modules, subprograms, or files that store portions of code), or parts of files that hold other programs or data. (eg, one or more scripts stored within a markup language document).

delete

The processes and logic flows described herein can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output.

Processors suitable for the execution of computer programs include, for example, both general and special purpose microprocessors and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from either read-only memory or random access memory or both.

The core elements of a computer are one or more memory devices for storing instructions and data and a processor for executing instructions.

The present description presents the best mode of the invention and provides examples to illustrate the invention and to enable those skilled in the art to make and use the invention. The specification thus prepared does not limit the invention to the specific terms presented.

Therefore, although the present invention has been described in detail with reference to the above-described examples, those skilled in the art may make alterations, changes, and modifications to the present examples without departing from the scope of the present invention.

10: cryogenic fuel tank
20: housekeeper
30: Outlaw
120: cryogenic liquid fuel discharge unit
230: heat conduction member
131: first electromagnet member
132: second electromagnet member
133: third electromagnet member
134: fourth electromagnet member
241: second electromagnet member guide
242: fourth electromagnet member guide
150: heater

Claims (11)

delete In the cryogenic fuel tank pressure control system,
a cryogenic fuel tank including an inner tank and an outer tank surrounding the inner tank with a vacuum section spaced apart therebetween;
A cryogenic liquid fuel discharge unit formed at the bottom of the inner tub to discharge the cryogenic liquid fuel to the outside of the outer tub; and
A heat conducting member configured to connect the inner surface of the outer shell and the outer surface of the inner shell to transfer heat from the outer shell to the inner shell,
The heat transferred from the outer tank raises the temperature of the inner tank, thereby increasing the pressure of the inner tank so that the cryogenic liquid fuel is discharged from the inner tank to the outside of the outer tank.
The heat conducting member,
It includes a length-variable conductor that moves in a straight line, and is provided to be spaced apart from the inner surface of the outer shell or the outer surface of the inner shell, which are opposed to at least one selected from the outer surface of the inner shell or the inner surface of the outer shell,
In order to increase the pressure of the inner tub, the controller further comprises a control unit for transferring heat from the outer tub to the inner tub by controlling the length-variable conductor to come into contact with the inner surface of the outer tub or the outer surface of the inner tub, respectively, opposed to each other without lifting. Cryogenic fuel tank pressure regulation system.
According to claim 2,
The heat conducting member,
The cryogenic fuel tank pressure control system of claim 1 , further comprising a first heat conduction member provided at an upper portion of the fuel tank in a vertical direction and heating the cryogenic gas fuel accommodated in the inner tank.
According to claim 3,
The heat conducting member,
A second heat conduction member provided at a lower part in the vertical direction of the fuel tank to heat the cryogenic liquid fuel accommodated in the inner tank,
The cryogenic fuel tank pressure control system, characterized in that the control unit controls the operation of the first heat conduction member and the second heat conduction member in consideration of the required pressure value and time of the inner tank.
In the cryogenic fuel tank pressure control system,
a cryogenic fuel tank including an inner tank and an outer tank surrounding the inner tank with a vacuum section spaced apart therebetween;
Cryogenic liquid fuel discharge unit for discharging the cryogenic liquid fuel from the inner tank to the outside of the outer tank; and
A heat conducting member configured to connect the inner surface of the outer shell and the outer surface of the inner shell to transfer heat from the outer shell to the inner shell,
The heat transferred from the outer tank raises the temperature of the inner tank, thereby increasing the pressure of the inner tank so that the cryogenic liquid fuel is discharged from the inner tank to the outside of the outer tank.
Heat conduction member
a first electromagnet member connected to an outer surface of the inner tub;
a second electromagnet member positioned to be in contact with or spaced apart from the first electromagnet member;
a second electromagnet member guide connected to the outer surface of the inner tub and being a tubular member surrounding the first electromagnet member and the second electromagnet member;
a third electromagnet member connected to the inner surface of the outer shell;
a fourth electromagnet member positioned to be in contact with or spaced apart from the third electromagnet member;
a fourth electromagnet member guide connected to the inner surface of the outer tub and being a tubular member surrounding the third electromagnet member and the fourth electromagnet member; and
Including an electromagnet control unit for generating polarity by supplying current to the first electromagnet member, the second electromagnet member, the third electromagnet member, and the fourth electromagnet member,
The second electromagnet member moves up and down along the second electromagnet member guide,
The fourth electromagnet member moves up and down along the fourth electromagnet member guide,
electromagnet control unit
When heat is not supplied to the inner tank, opposite polarities are formed on the facing surfaces of the first electromagnet member and the second electromagnet member, and opposite polarities are formed on the facing surfaces of the third electromagnet member and the fourth electromagnet member. Forming the same polarity on the facing surfaces of the electromagnet member and the fourth electromagnet member to space the second electromagnet member and the fourth electromagnet member apart;
When supplying heat to the
The same polarity is formed on the facing surfaces of the first electromagnet member and the second electromagnet member, the same polarity is formed on the facing surfaces of the third electromagnet member and the fourth electromagnet member, and the second electromagnet member and the fourth electromagnet member have the same polarity. A cryogenic fuel tank pressure control system, characterized in that the second electromagnet member and the fourth electromagnet member are brought into contact by forming opposite polarities on the facing surfaces.
According to claim 5,
electromagnet control unit
Supplying current to the second electromagnet member through the second electromagnet member guide;
A cryogenic fuel tank pressure control system, characterized in that for supplying current to the fourth electromagnet member through the fourth electromagnet member guide.
According to claim 6,
The first electromagnet member is spaced apart from the second electromagnet member guide,
The cryogenic fuel tank pressure control system, characterized in that the third electromagnet member is spaced apart from the fourth electromagnet member guide.
According to claim 7,
The second electromagnet member and the fourth electromagnet member are cylindrical members, and include a second protruding guide part and a fourth protruding guide part protruding at predetermined intervals along the outer circumferential surface, wherein the second protruding guide part and the fourth protruding guide part are cylindrical. A rail-like member extending in the longitudinal direction,
The second electromagnet member guide and the fourth electromagnet member guide are cylindrical members,
The second electromagnet member guide and the fourth electromagnet member guide include a second concave guide portion and a fourth concave guide portion into which the second protruding guide portion and the fourth protruding guide portion are inserted on the inner circumferential surface, the second concave guide portion and the fourth concave guide portion. The guide portion is a groove-shaped member extending in the longitudinal direction of the cylinder,
The cryogenic fuel tank pressure control system, characterized in that the second protruding guide portion and the second protruding guide portion slide along the second concave guide portion and the fourth concave guide portion, respectively.
3. The system of claim 2, wherein the cryogenic fuel tank pressure regulation system
The cryogenic fuel tank pressure control system further comprises a heater positioned on an outer surface of the outer shell and heating the outer shell of the outer shell equipped with the heat conducting member or the heat conducting member.
A method for regulating the pressure of a cryogenic fuel tank,
A step of linearly moving a length-variable conductor located on an inner surface of an outer shell and spaced apart from an outer surface of an opposing inner shell to bring it into contact with the outer surface of the inner shell without lifting; and
The method of regulating the pressure of a cryogenic fuel tank, characterized in that it comprises the step of transferring heat from the outer shell to the inner shell by means of the variable length conductor.
A computer-readable storage medium recording a program for regulating the pressure of a cryogenic fuel tank,
A step of linearly moving a length-variable conductor located on an inner surface of an outer shell and spaced apart from an outer surface of an opposing inner shell to bring it into contact with the outer surface of the inner shell without lifting; and
A computer-readable storage medium recording a program for executing the step of transferring heat from the outer tub to the inner tub by the variable-length conductor.

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