KR102476799B1 - System and method for regulating pressure in liquid hydrogen fuel tank - Google Patents

Abstract

A liquid hydrogen fuel tank pressure control system according to an embodiment according to the technical idea of the present invention includes a liquid hydrogen fuel tank including an inner tank and an outer tank surrounding the inner tank with a vacuum section at a predetermined interval; a gaseous hydrogen outlet for discharging gaseous hydrogen from the inner tank containing liquid hydrogen and gaseous hydrogen to the outside of the outer tank; and a heat conducting member configured to connect an inner surface of the outer shell and an 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 to produce gaseous hydrogen. It can be discharged from the inner tank to the outside of the outer tank.

Description

Liquid hydrogen fuel tank pressure regulating system and method {System and method for regulating pressure in liquid hydrogen fuel tank}

The present invention relates to a liquid hydrogen fuel tank pressure control system and method, and more particularly, to a liquid hydrogen 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 gaseous hydrogen. A liquid hydrogen fuel tank pressure control 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.

Although the concept of the existing cryogenic fuel supply system can be introduced to fuel propulsion using liquid hydrogen, when the PBU system is introduced to boost the pressure, an electric heater and a small pressure vessel line must be additionally configured in addition to the fuel tank, so this It acts as a big disadvantage in small fuel supply devices where volumetric efficiency is important.

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

The technical problem to be achieved by the liquid hydrogen fuel tank pressure control system and method according to the technical idea of the present invention is not limited to the above-mentioned problem, and another problem not mentioned is clearly understood by those skilled in the art from the description below. It could be.

A liquid hydrogen fuel tank pressure control system according to an embodiment according to the technical idea of the present invention includes a liquid hydrogen fuel tank including an inner tank and an outer tank surrounding the inner tank with a vacuum section at a predetermined interval; a gaseous hydrogen outlet for discharging gaseous hydrogen from the inner tank containing liquid hydrogen and gaseous hydrogen to the outside of the outer tank; and a heat conducting member configured to connect an inner surface of the outer shell and an 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 to produce gaseous hydrogen. It can 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 to heat gaseous hydrogen 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 liquid hydrogen accommodated in the inner tank, and the control unit considers the required pressure value and time of the inner tank. , It is possible to control the operation of the first heat conducting member and the second heat conducting member.

The heat conducting member includes a first electromagnet member connected to an outer surface of the inner tub by a first length-variable member; a second electromagnet member connected to the inner surface of the outer shell by a second variable-length member; and an electromagnet control unit supplying current to the first electromagnet member and the second electromagnet member to generate polarity, wherein the electromagnet control unit is disposed on opposite surfaces of the first electromagnet member and the second electromagnet member when heat is not supplied to the inner tub. The same polarity is formed to separate the first electromagnet member and the second electromagnet member, and when heat is supplied to the inner tank, opposite polarities are formed on the facing surfaces of the first electromagnet member and the second electromagnet member, so that the first electromagnet member and the second electromagnet member The second electromagnet member can be brought into contact.

The first length-variable member and the second length-variable member may be coil springs.

The heat conducting member includes a first electromagnet member guide that is connected to the outer surface of the inner tub and is a tubular member surrounding the first electromagnet member; and a second electromagnet member guide that is connected to the inner surface of the outer tub and is a tubular member surrounding the second electromagnet member.

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

The liquid hydrogen fuel tank pressure control system may further include 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.

According to one embodiment of the technical idea of the present invention, a method for regulating the pressure of a liquid hydrogen fuel tank includes the steps of 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 with 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 an embodiment according to the technical idea of the present invention, the computer readable medium recording the program for adjusting the pressure of the liquid hydrogen fuel tank is located on the inner surface of the outer tank and conducts heat in a state of being spaced apart from the outer surface of the inner tank. connecting the member to 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 liquid hydrogen fuel tank pressure control system and method according to embodiments according to the technical concept of the present invention controls the temperature of a liquid hydrogen fuel tank composed of an inner tank and an outer tank by using a variable-length conductor located between the inner tank and the outer tank. Gaseous hydrogen can be released by regulating the pressure in the inner tank.

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

The liquid hydrogen 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, the effects that can be achieved by the liquid hydrogen 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 are those skilled in the art from the description below. will be clearly understandable.

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

The liquid hydrogen fuel tank pressure control system according to an embodiment of the present invention may include a liquid hydrogen fuel tank 10, a gaseous hydrogen discharge unit 120, a heat conduction member 130, and a heater 150.

The liquid hydrogen 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 It has a structure surrounding (20). Due to this vacuum section 22, an insulating effect is generated between the inner tub 20 and the outer tub 30.

Liquid hydrogen and gaseous hydrogen may be accommodated in the inner tank 20 , and gaseous hydrogen may be produced by vaporizing liquid hydrogen. Since gaseous hydrogen is used as the fuel of the power unit in the liquid hydrogen fuel tank pressure control system, gaseous hydrogen in the inner tank 20 is discharged through the gaseous hydrogen outlet 120 .

The gaseous hydrogen discharge unit 120 is in the form of a tube communicating the upper space 23 of the inner tub 20 and the outside of the outer circumference 30 in order to discharge gaseous hydrogen vaporized in the inner tub 20 to the outside of the outer tub 30. may contain the structure of The gaseous hydrogen discharge unit 120 is formed at the top, so that liquid hydrogen is prevented from being discharged, and only gaseous hydrogen can be discharged.

In order to discharge gaseous hydrogen, the internal pressure is increased by raising the temperature of the fluid in the inner tank, and gaseous hydrogen may be discharged through the gaseous hydrogen outlet 120 by the increased pressure. To this end, a means for heating the inner tub 20 is required.

The heat conducting member 130 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 130 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 130 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 130 is spaced apart. ) can be controlled to contact the heat conducting member 130 .

The heater 150 is located on the outer surface of the outer tub 30 and heats the heat conducting member 130, and the heat generated by the heater 150 is conducted to the inner tub 20 through the heat conducting member 130. . 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 130 , ice may be formed on the outer surface of the outer tub 30 , which loses heat to the inner tub 20 . To prevent this, the heater 150 may indirectly heat the heat conducting member 130 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 130. have. 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 130 is installed.

The heat transferred from the outer shell 30 raises the temperature of the inner shell 20, thereby increasing the pressure of the inner shell 20 to expand gaseous hydrogen or vaporize liquid hydrogen. ) It can be discharged to the outside of the outer tub (30).

The heat conduction member 130 may include at least one first heat conduction member provided in the vacuum section 22 at the upper part in the vertical direction of the fuel tank to heat gaseous hydrogen accommodated inside the inner tank 20 . The method of adjusting the internal pressure of the inner tub 20 by heating the gaseous hydrogen 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 130 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 liquid hydrogen contained in the inner tank 20. The method of adjusting the internal pressure of the inner tank 20 by heating the liquid hydrogen 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 130 shown in FIG. 1 , a heat conduction controller (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.

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 130 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 130 is separated from the inner tub 20, the transfer of heat generated by the heater 150 to the inner tub 20 is blocked, and the T-shaped heat conducting member 130 is separated from the inner tub 20. Upon contact, heat generated by the heater 150 is transferred to the inner tub 20 .

A plurality of heat conducting members 130 may be arranged along the inner tub 20 , and more heat conducting members 130 may be arranged under the inner tub 20 where the liquid hydrogen is located. Through this, vaporization of liquid hydrogen can be effectively achieved.

Another structure of the heat conducting member 130 is shown in FIGS. 2 and 3 . The heat conducting member 130 includes a first electromagnet member 131, a first length variable member 132, a second electromagnet member 133, a second length variable member 134, a first electromagnet member guide 141, 2 may include an electromagnet member guide 142 and an electromagnet controller (not shown).

The first electromagnet member 131 is connected to the outer surface 21 of the inner tub 20 through a first variable length member 132 . Here, the first electromagnet member 131 may be in various column shapes such as a cylinder, a square column, or a triangular column, and the first length-variable member 132 may be a coil spring.

The second electromagnet member 133 is connected to the inner surface 31 of the outer tub 30 and the second variable length member 134 . Here, the second electromagnet member 133 may be in various column shapes such as a cylinder, a square column, or a triangular column, and the second length-variable member 134 may be a coil spring.

The first electromagnet member 131 and the second electromagnet member 133 have polarities at both ends as current is applied, and an anode and a cathode are determined according to the direction of the current. The current applied to the first electromagnet member 131 and the second electromagnet member 133 may be transmitted through the first electromagnet member guide 141 and the second electromagnet member guide 142 .

The first electromagnet member guide 141 is a tubular member connected to the outer surface 21 of the inner tub 20 and surrounding the first electromagnet member 131, and may be made of a metal material. The inner surface of the first electromagnet member guide 141 remains in contact with the outer surface of the first electromagnet member 131, and thus the first electromagnet member guide 141 transmits heat and current to the first electromagnet member 131. can be conveyed

The second electromagnet member guide 142 is a tubular member connected to the inner surface 31 of the outer tub 30 and surrounding the second electromagnet member 133, and may be made of a metal material. The inner surface of the second electromagnet member guide 142 remains in contact with the outer surface of the second electromagnet member 133, and thus the second electromagnet member guide 142 transmits heat and current to the second electromagnet member 133. can be conveyed

As shown in FIG. 3, the first electromagnet member 131 and the second electromagnet member 133 may be cylindrical members, and the first protruding guide parts 136 protruding at predetermined intervals along the outer circumferential surface, and Second protruding guide parts 137 may be included. Here, the first protruding guide part 136 and the second protruding guide part 137 may be rail-like members extending in the cylindrical length direction of the first electromagnet member 131 and the second electromagnet member 133 .

The first electromagnet member guide 141 and the second electromagnet member guide 142 respectively corresponding to the first electromagnet member 131 and the second electromagnet member 133 may be cylindrical members, and the first electromagnet member guide 141 ) And the second electromagnet member guide 142 includes first concave guide parts 146 and second concave guide parts into which the first protruding guide parts 136 and the second protruding guide parts 137 are inserted on the inner circumferential surface ( 147) may be included. Here, the first concave guide part 146 and the second concave guide part 147 may be groove-shaped members extending in the cylindrical length direction of the first electromagnet member guide 141 and the second electromagnet member guide 142 .

The first protruding guide part 136 and the second protruding guide part 137 may slide along the first concave guide part 146 and the second concave guide part 147 , respectively. Accordingly, as shown in FIG. 2, the first electromagnet member 131 and the second electromagnet member 133 maintain a horizontal state and can perform linear motion with each other, and when they come into contact with each other, they contact each other without lifting. It can be.

The electromagnet control unit may generate polarity by supplying current to the first electromagnet member 131 and the second electromagnet member 133 through the first electromagnet member guide 141 and the second electromagnet member guide 142 .

When supplying heat to the inner tub 20, the electromagnet control unit applies opposite polarities (for example, positive electrode and negative electrode, or negative electrode and positive electrode) to opposite surfaces of the first electromagnet member 131 and the second electromagnet member 133. By forming, the first electromagnet member 131 and the second electromagnet member 133 are attracted to each other so that the first electromagnet member 131 and the second electromagnet member 133 come into contact with each other.

The heat generated by the heater 150 is transferred to the second electromagnet member 133 through the second electromagnet member guide 142 and the second length-variable member 134, and then through the first electromagnet member 131. It is transferred to the inner tub 20 through the first electromagnet member guide 141 and the first length-variable member 132 .

When heat is not supplied to the inner tub 20, the electromagnet controller has the same polarity (eg, positive electrode and positive electrode, or negative electrode and negative electrode) on opposite surfaces of the first electromagnet member 131 and the second electromagnet member 133. ), the first electromagnet member 131 and the second electromagnet member 133 may push each other to create a spaced state.

When the same polarity is formed on the facing surfaces of the first electromagnet member 131 and the second electromagnet member 133, the first length-variable member 132 and the second length-variable member 134, which are coil springs, respectively have a first Pulling the electromagnet member 131 and the second electromagnet member 133 helps to separate the first electromagnet member 131 and the second electromagnet member 133. In addition, when current is not applied to the first electromagnet member 131 and the second electromagnet member 133, the first electromagnet member 131 and the second electromagnet member 133 are pulled by elastic force, so that the first electromagnet member 131 ) and the second electromagnet member 133 may be prevented from contacting each other due to their own weight. In addition, the first length-variable member 132 and the second length-variable member 134 also serve as a medium for conducting heat transfer.

A method for adjusting the pressure of a liquid hydrogen 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 130 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.

Next, a step of transferring heat to the heat conducting member 130 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 shell 30 raises the temperature of the inner shell 20, thereby increasing the pressure of the inner shell 20 to expand gaseous hydrogen or vaporize liquid hydrogen. ) It can be discharged to the outside of the outer tub (30).

A computer-readable medium recording a program according to an embodiment of the technology disclosed herein is a computer-readable medium recording a program for adjusting the pressure of a liquid hydrogen fuel tank, (a) an outer tank (30) connecting the heat conducting member 130 located on the inner surface 31 of the inner tub 20 and spaced apart from the outer surface 21 of the inner tub 20; and (b) transferring heat to the heat conducting member 130 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 computer programs (also known as programs, software, software applications, scripts, or code) written in any form of programming language, including compiled or interpreted languages or a priori or procedural languages. can be written and deployed in any form, including stand-alone programs, modules, components, subroutines, or other units suitable for use in a computer environment.

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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).

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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: liquid hydrogen fuel tank
20: housekeeper
30: Outlaw
120: gaseous hydrogen outlet
130: heat conduction member
131: first electromagnet member
132: first length-variable member
133: second electromagnet member
134: second length variable member
141: first electromagnet member guide
142: second electromagnet member guide
150: heater

Claims (11)

delete In the liquid hydrogen fuel tank pressure control system,
a liquid hydrogen fuel tank including an inner tank and an outer tank surrounding the inner tank with a vacuum section spaced apart therebetween;
a gaseous hydrogen outlet for discharging gaseous hydrogen from the inner tank containing liquid hydrogen and gaseous hydrogen 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 by means of a conductor,
Heat transferred from the outer shell is configured to increase the pressure of the inner shell by increasing the temperature of the inner shell to discharge gaseous hydrogen from the inner shell to the outside of the outer shell,
The heat conducting member,
It includes a conductor that is a coil spring member with a variable length in the vertical direction, and is provided to be spaced apart from the inner surface of the outer shell or the outer surface of the inner shell, respectively opposed to at least one selected from the outer surface of the inner shell or the inner surface of the outer shell,
The liquid hydrogen fuel tank pressure control system further comprising a control unit controlling the contact surface of the heat conducting member to come into close contact with the inner surface of the outer tank or the outer surface of the inner tank, respectively, in order to increase the pressure of the inner tank.
According to claim 2,
The heat conducting member,
The liquid hydrogen fuel tank pressure control system comprising a first heat conduction member provided at the upper part in the vertical direction of the fuel tank to heat gaseous hydrogen accommodated inside 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 liquid hydrogen contained in the inner tank;
The liquid hydrogen 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 liquid hydrogen fuel tank pressure control system,
a liquid hydrogen fuel tank including an inner tank and an outer tank surrounding the inner tank with a vacuum section spaced apart therebetween;
a gaseous hydrogen outlet for discharging gaseous hydrogen from the inner tank containing liquid hydrogen and gaseous hydrogen 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,
Heat transferred from the outer shell is configured to increase the pressure of the inner shell by increasing the temperature of the inner shell to discharge gaseous hydrogen from the inner shell to the outside of the outer shell,
Heat conduction member
a first electromagnet member connected to an outer surface of the inner tub by a first variable-length member;
a second electromagnet member connected to the inner surface of the outer shell by a second variable-length member; and
Including an electromagnet control unit for generating polarity by supplying current to the first electromagnet member and the second electromagnet member,
electromagnet control unit
When heat is not supplied to the inner tank, the same polarity is formed on the facing surfaces of the first electromagnet member and the second electromagnet member to separate the first electromagnet member and the second electromagnet member,
When heat is supplied to the inner tank, opposite polarities are formed on the facing surfaces of the first electromagnet member and the second electromagnet member to bring the first electromagnet member and the second electromagnet member into contact.
According to claim 5,
The liquid hydrogen fuel tank pressure control system, characterized in that the first length-variable member and the second length-variable member are coil springs.
According to claim 5,
Heat conduction member
a first electromagnet member guide connected to the outer surface of the inner tub and being a tubular member surrounding the first electromagnet member; and
The liquid hydrogen fuel tank pressure control system further comprising a second electromagnet member guide connected to the inner surface of the outer tank and being a tubular member surrounding the second electromagnet member.
According to claim 7,
The first electromagnet member and the second electromagnet member are cylindrical members, and include a first protruding guide part and a second protruding guide part protruding at predetermined intervals along the outer circumferential surface, wherein the first protruding guide part and the second protruding guide part are cylindrical. A rail-like member extending in the longitudinal direction,
The first electromagnet member guide and the second electromagnet member guide are cylindrical members,
The first electromagnet member guide and the second electromagnet member guide include a first concave guide part and a second concave guide part into which the first protruding guide part and the second protruding guide part are inserted on the inner circumferential surface, the first concave guide part and the second concave guide part. The guide portion is a groove-shaped member extending in the longitudinal direction of the cylinder,
The liquid hydrogen fuel tank pressure control system, characterized in that the first protruding guide portion and the second protruding guide portion slide along the first concave guide portion and the second concave guide portion, respectively.
3. The liquid hydrogen fuel tank pressure regulating system of claim 2,
The liquid hydrogen fuel tank pressure control system, characterized in that it is located on the outer surface of the outer shell, further comprising a heater for heating the outside of the outer shell or the heat conductive member provided with the heat conducting member.

A method for regulating the pressure of a liquid hydrogen fuel tank,
connecting the contact surface of the heat conduction member located on the inner surface of the outer shell and spaced apart from the outer surface of the inner shell to the outer surface of the inner shell by a conductor that is a variable-length coil spring member in a vertical direction so as to be in close contact with the outer surface of the inner shell; and
A method for regulating the pressure of a liquid hydrogen fuel tank, characterized by comprising transferring heat to a heat conducting member connecting an inner surface of an outer shell and an outer surface of an inner shell by a conductor.
A computer-readable storage medium recording a program for regulating the pressure of a liquid hydrogen fuel tank,
connecting the contact surface of the heat conduction member located on the inner surface of the outer shell and spaced apart from the outer surface of the inner shell to the outer surface of the inner shell by a conductor that is a variable-length coil spring member in a vertical direction so as to be in close contact with the outer surface of the inner shell; and
A computer-readable storage medium recording a program for executing a step of transferring heat to a heat conducting member connecting an inner surface of an outer shell and an outer surface of an inner shell by a conductor.

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