KR102558636B1 - Liquid hydrogen vaporization system using heat pump with bypass pipe - Google Patents

Abstract

The present invention is a heat pump having a compressor device, a condenser, an expansion device, and an evaporator; A hydrogen pipe for vaporizing liquefied hydrogen while exchanging heat with the condenser; a second condenser installed between the condenser and the expansion device; and a second evaporator installed between the expansion device and the evaporator, one end of which is connected to the inlet side of the condenser and extends to divide into a first other end and a second other end, wherein the first bypass pipe is connected between the condenser and the second condenser, and the second other end is connected to the outlet side of the second condenser; first bypass valves installed on one end side and the other first and second end sides of the first bypass pipe to control flow rates; A second bypass pipe having one end connected to the inlet side of the second evaporator and extending to be divided into a first other end and a second other end, the first other end being connected between the evaporator and the second evaporator, and the second other end being connected to the outlet side of the evaporator; And characterized in that it further comprises a second bypass valve installed on one end side and the first and second other end sides of the second bypass pipe to control the flow rate, respectively,
There is an effect that the user can use it more efficiently while using it for multiple purposes according to the need.

Description

Liquid hydrogen vaporization system using a heat pump with a bypass pipe introduced {LIQUID HYDROGEN VAPORIZATION SYSTEM USING HEAT PUMP WITH BYPASS PIPE}

The present invention relates to a liquefied hydrogen vaporization system using a heat pump, and more particularly, to a liquefied hydrogen vaporization system using a heat pump in which two condensers and two evaporators are configured in a ratio of 2:2, a bypass method is applied so that one or two of the two condensers are selectively used, and one or two of the two evaporators are selectively used. .

In general, in order for a fuel cell to have a basic system configuration, a fuel container, a reformer that reforms the fuel stored in the fuel container to generate hydrogen gas (hereinafter referred to as 'vaporized gas') and supplies the vaporized hydrogen to the stack, and a fuel cell body called a stack that generates electricity are required.

A reformer, one of the system configurations of the fuel cell related to the above, is a device that converts fuel and water including hydrogen into vaporized hydrogen necessary for generating electricity in the stack by a reforming reaction, but the design for reforming the fuel is complicated and there is a problem in that additional cost is incurred to generate vaporized hydrogen.

In order to solve these problems, liquefied hydrogen, which has a higher energy density than vaporized hydrogen, is used, and at the same time, a system capable of generating electricity by supplying vaporized hydrogen to the fuel cell body while excluding a reformer that is complicated in design and incurs additional costs in the system configuration of the fuel cell is being researched.

FIG. 1 is a block diagram of a liquefied hydrogen vaporization system using such a heat pump. As shown in FIG. 1 , the heat pump 50 supplies gaseous hydrogen to the fuel cell 20 .

Here, the heat pump 50 operates by the refrigerant cycle 90, and the refrigerant cycle 90 consists of a closed circuit in which a compressor 51, a condenser 52, an expander 53, and an evaporator 54 are connected in succession.

On the other hand, the liquefied hydrogen stored in the liquefied hydrogen tank 10 is heated while passing through the condenser 52 by the hydrogen pipe 100 and vaporized to become gaseous hydrogen.

In order to increase the output of the fuel cell in the above-described conventional liquefied hydrogen vaporizer using a heat pump, the amount of vaporized hydrogen had to be increased, and as a result, the capacity of each component constituting the refrigerant cycle had to be designed to be large.

This may cause technical limitations that appear as uneconomical factors such as an increase in the external appearance of the heat pump, an expansion of an installation space, and an increase in manufacturing cost, and there is a disadvantage in that usable uses are also limited.

Therefore, there is a demand for a technology related to a liquefied hydrogen vaporization system using a heat pump that can more efficiently increase the output of a fuel cell and can be utilized for multiple purposes.

Republic of Korea Patent Registration No. 10-1345840 (title of invention: heat pump with double heat exchanger) Republic of Korea Utility Model Registration No. 20-0365161 (Title of Invention: Accumulator for carbon dioxide refrigerant integrated with internal heat exchanger)

Accordingly, the present invention configures two condensers and two evaporators so that they are provided in a 2:2 ratio, and by applying a bypass method so that one or two of the two condensers are selectively used, and at the same time, one or two of the two evaporators are selectively used. An object of the present invention is to provide a liquefied hydrogen vaporization system using a heat pump with a bypass pipe that can be used more efficiently while being used for multiple purposes as needed by the user.

However, the technical problem to be achieved in the present invention is not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly understood by those skilled in the art from the description below.

A liquefied hydrogen vaporization system using a heat pump introduced with a bypass pipe according to an embodiment of the present invention, which is a technical means for achieving the above object, includes a heat pump having a compressor, a condenser, an expansion device, and an evaporator; A hydrogen pipe for vaporizing liquefied hydrogen while exchanging heat with the condenser; a second condenser installed between the condenser and the expansion device; and a second evaporator installed between the expansion device and the evaporator, one end of which is connected to the inlet side of the condenser and extends to divide into a first other end and a second other end, wherein the first bypass pipe is connected between the condenser and the second condenser, and the second other end is connected to the outlet side of the second condenser; first bypass valves installed on one end side and the other first and second end sides of the first bypass pipe to control flow rates; A second bypass pipe having one end connected to the inlet side of the second evaporator and extending to be divided into a first other end and a second other end, the first other end being connected between the evaporator and the second evaporator, and the second other end being connected to the outlet side of the evaporator; And it may further include a second bypass valve installed on one end side and the first and second other end sides of the second bypass pipe to correspond to each other to control the flow rate.

The heat pump may further include a refrigerant pipe providing a refrigerant passage while continuously connecting the compressor, condenser, expansion device, and evaporator, the first and second bypass pipes may be connected to the refrigerant pipe, and the refrigerant selectively passes through one or both of the condenser and the second condenser through at least one of the refrigerant pipe and the first and second bypass pipes according to a selective opening and closing operation of the first and second bypass valves, respectively. While doing so, it can move in a path selectively passing through one or both of the evaporator and the second evaporator.

In addition, when the first bypass valves at one end side and the first other end side of the first bypass pipe are opened and the first bypass valve at the second other end side of the first bypass pipe is closed, the path bypasses the condenser and does not pass through the second condenser A first path; a second path passing through the condenser and bypassing the second condenser when the first bypass valve at one end of the first bypass pipe is closed and the first bypass valve at the other ends of the first and second bypass pipes is opened; a third path passing through both the condenser and the second condenser when the first bypass valves at one end of the first bypass pipe and at the other ends of the first and second pipes are closed; When the second bypass valves at one end side and the other first end side of the second bypass pipe are opened and the second bypass valve at the second other end side of the second bypass pipe is closed, a fourth path bypassing the second evaporator and passing through the evaporator while not passing through the second bypass pipe; a fifth path bypassing the evaporator while passing through the second evaporator when the second bypass valve at one end of the second bypass pipe is closed and the second bypass valve at the other ends of the first and second bypass pipes is opened; and a sixth path passing through both the evaporator and the second evaporator when all of the second bypass valves at one end side of the second bypass pipe and at the other ends of the first and second bypass pipes are closed.

In addition, an air pipe for exchanging heat in the evaporator via the fuel cell; And it may further include an air fan installed on the air pipe.

In addition, a second air pipe for exchanging heat in the second condenser; And it may further include a second air fan installed on the second air pipe.

In addition, a third air pipe for heat exchange in the second evaporator; and a third air fan installed on the third air pipe.

In addition, the hydrogen pipe may further include a pressure control valve for controlling the pressure of the vaporized hydrogen to be constant.

In addition, gaseous hydrogen discharged at a constant pressure by the pressure control valve may be supplied to the fuel cell.

The liquefied hydrogen vaporization system using a heat pump to which a bypass pipe according to the present invention is introduced is composed of two condensers and two evaporators so that they are provided in a 2:2 ratio, and one or two of the two condensers are selectively used by applying a bypass method. At the same time, one or two of the two evaporators are selectively used, so that the user can use them for multiple purposes and more efficiently as needed.

However, the effects obtainable in the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a block diagram of a liquefied hydrogen vaporization system using a conventional heat pump.
2 is a block diagram of a liquefied hydrogen vaporization system using a heat pump to which a bypass pipe is introduced according to an embodiment of the present invention.
FIG. 3 is a configuration diagram showing a movement path of refrigerant according to control of first and second bypass valves in a liquefied hydrogen vaporization system using a heat pump into which the bypass pipe is introduced.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, since the description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiment can be changed in various ways and can have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, the scope of the present invention should not be construed as being limited thereto.

The meaning of terms described in the present invention should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from another, and the scope of rights should not be limited by these terms. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element. It should be understood that when an element is referred to as being “connected” to another element, it may be directly connected to the other element, but other elements may exist in the middle. On the other hand, when an element is referred to as being “directly connected” to another element, it should be understood that no intervening elements exist. Meanwhile, other expressions describing the relationship between components, such as “between” and “immediately between” or “adjacent to” and “directly adjacent to” should be interpreted similarly.

Singular expressions should be understood to include plural expressions unless the context clearly dictates otherwise, and terms such as "comprise" or "have" are intended to designate that the described features, numbers, steps, operations, components, parts, or combinations thereof exist, and it should be understood that the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof is not precluded.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Terms defined in commonly used dictionaries should be interpreted as consistent with meanings in the context of related art, and cannot be interpreted as having ideal or excessively formal meanings unless explicitly defined in the present invention.

Hereinafter, the configuration of a preferred embodiment will be described in detail with reference to the accompanying drawings.

2 is a configuration diagram of a liquefied hydrogen vaporization system using a heat pump to which a bypass pipe is introduced according to an embodiment of the present invention, and FIG. 3 is a configuration diagram showing a refrigerant movement path under control of first and second bypass valves in a liquefied hydrogen vaporization system using a heat pump to which the bypass pipe is introduced.

As shown in FIG. 2, the liquefied hydrogen vaporization system using the heat pump to which the bypass pipe of the preferred embodiment of the present invention is introduced may include a liquefied hydrogen tank 10, a heat pump 50, a pressure control valve 30, a fuel cell 20, and a fuel recovery device 60 in series, an air fan 40, an air pipe 45, first and second bypass valves 61 and 62, and first and second bypass pipes 7 1, 81), the second condenser 70, the second evaporator 80, the second and third air fans 72 and 82, the second and third air pipes 73 and 83, and the hydrogen pipe 100 It may be configured to further include.

The liquefied hydrogen tank 10 stores liquefied hydrogen to be vaporized as vaporized hydrogen used as fuel of the fuel cell 20 . At this time, it is preferable that the internal temperature of the liquefied hydrogen tank 10 is maintained at -253 ° C. so that hydrogen becomes liquefied in order to store liquefied hydrogen in a cryogenic state (eg, 20K to 40K), and the liquefied hydrogen has a high energy density compared to vaporized hydrogen.

The hydrogen pipe 100 is connected between the liquefied hydrogen tank 10 and the fuel cell 20, is configured to exchange heat while passing through the condenser 52, and maintains the pressure of vaporized gaseous hydrogen. A pressure control valve 30 (eg, a regulator) is installed. The pressure control valve 30 may be replaced with at least one of a relief valve, a sequence valve, a counterbalance valve, and a pressure switch.

Gaseous hydrogen discharged at a constant pressure by the pressure control valve 30 may be supplied to the fuel cell 20 .

The fuel cell 20 is a device that generates electricity by converting chemical energy generated by an electrochemical reaction between gaseous hydrogen and oxygen supplied through a hydrogen pipe 100 into electrical energy. The fuel cell 20 of the present invention may be a hydrogen fuel cell applied to railway vehicles (trains, trains, subways, etc.).

The fuel cell 20 may be at least one of an alkali fuel cell (AFC), a molten carbonate fuel cell (MCFC), a phosphoric acid fuel cell (PAFC), a solid oxide fuel cell (SOFC), a polymer electrolyte fuel cell (PEMFC, PEFC), and a direct methanol fuel cell (DMFC).

In this way, fuel cells that can be implemented as the fuel cell 20 should be equipped with a reformer that generates hydrogen (vaporized hydrogen) from fossil fuel to produce electric energy, but in the liquefied hydrogen vaporization system of the present invention, as vaporized hydrogen is generated through the heat pump 50, the reformer may be omitted from the configuration.

Accordingly, the fuel cell 20 of the present invention is preferably a fuel cell main body, which is a stack that generates electricity in the fuel cell system configuration.

In addition, the fuel cell 20 communicates with the air pipe 45 to discharge waste heat (e.g., 61 ° C. to 120 ° C.) generated during the reaction of vaporized hydrogen and oxygen as well as to produce electrical energy, and is connected to the fuel recovery unit 60 for recovery of used fuel.

In this case, the waste heat generated from the fuel cell 20 may be medium-temperature oxygen or oxygen having a relatively higher temperature than the medium-temperature oxygen.

In addition, the fuel recovery device 60 recovers the fuel generated through the reaction of the fuel cell 20 and discharged. Here, the fuel recovered from the fuel recovery unit 60 means fuel (eg, hydrogen, etc.) not used in the reaction of the fuel cell 20 .

The heat pump 50 includes a refrigerant cycle 90, and the refrigerant cycle 90 consists of a closed circuit in which a compressor unit 51, a condenser 52, an expansion unit 53, and an evaporator 54 are continuously connected through a refrigerant pipe 55.

The refrigerant pipe 55 serves to provide a refrigerant passage.

The compressor unit 51 is installed between the evaporator 54 and the condenser 52, and compresses a medium-temperature (eg, 0 ° C. to 40 ° C.) low-pressure (eg, 15 bar or less) refrigerant into a high-temperature (eg, 40 ° C. to 100 ° C.) high-pressure (eg, 25 bar or more) refrigerant. The compressor device 51 may include a liquid separator, an oil separator, and the like, if necessary.

The condenser 52 is installed between the compressor device 51 and the expansion device 53, and generates medium-temperature and high-pressure liquid refrigerant through condensation of the high-temperature and high-pressure refrigerant. At this time, the high heat of the refrigerant in the condenser 52 is transferred to the hydrogen pipe 100 and used for vaporization of liquefied hydrogen.

The condenser 52 may be at least one of a water-cooled condenser that uses cooling water to perform the condensation process, an air-cooled condenser that dissipates heat using air, and an evaporative condenser that uses heat absorbed while water evaporates.

The expansion device 53 is installed between the condenser 52 and the evaporator 54, and expands the medium-temperature and high-pressure refrigerant condensed in the condenser 52 to generate a low-temperature (eg -40 ° C to 10 ° C) low-pressure refrigerant. An expansion valve may be applied to the expansion device 53.

The evaporator 54 is installed between the expansion device 53 and the compressor device 51, and the refrigerant cycle 90 passes through one channel, and the high-temperature air pipe 45 passes through the other channel to perform heat exchange. The evaporator 54 changes the low-temperature and low-pressure refrigerant into a medium-temperature and low-pressure refrigerant through such heat exchange.

Here, the evaporator 54 may be at least one of a dry expansion evaporator, a flooded evaporator, a semi-flooded evaporator, and a liquid recirculation type evaporator.

In addition, the air pipe 45 is configured to pass through the fuel cell 20 and the evaporator 54, and receives high-temperature heat from the fuel cell 20 to heat the refrigerant in the evaporator 54. An air fan 40 for forcibly flowing air may be configured on the air pipe 45 .

On the other hand, according to the present invention, in the liquefied hydrogen vaporization system using the hitting pump introduced, the second condenser 70, the second evapacus 80, the first and second bypass valves 61, 62, the first and second bypass valves 61, 62, second and third air plumbing in the refrigerant cycle 90 83) and the second and third air fans 72 and 82 are connected.

The second condenser 70 is installed between the condenser 52 and the expansion device 53. The second air pipe 73 extends from the outside and passes through the second condenser 70 to exchange heat with the refrigerant. The second air fan 72 is installed on the second air pipe 73 to forcibly flow air.

Due to the second condenser 70, the refrigerant can be additionally cooled, and thus, while discharging heat to the outside through the second air pipe 73, the configuration on the side of the second condenser 70 can be used as a known 'radiator'.

The second evaporator 80 is installed between the expansion device 53 and the evaporator 54 . The third air pipe 83 extends from the outside and passes through the second evaporator 80 to exchange heat with the refrigerant. The third air fan 82 is installed on the third air pipe 83 to forcibly flow air.

Due to the second evaporator 80, the refrigerant can be additionally warmed, and accordingly, the air for the heat absorbed to the second evaporator 80 side is discharged to the outside through the third air pipe 83. The configuration on the side of the second evaporator 80 can be used in addition to the fuel cell 20, for electronic equipment and cabins (rooms) requiring more cooling.

That is, the second condenser 70 and the second evaporator 80 of the present invention are configured identically to the condenser 52 and the evaporator 54 and can perform their functions secondarily.

The first bypass pipe 71 is a pipe that is connected to the refrigerant pipe 55 and extends in another direction. More specifically, one end is connected to the inlet side of the condenser 52 and is divided into a first other end and a second other end while extending. The first other end is connected between the condenser 52 and the second condenser 70, and the second other end is connected to the outlet side of the second condenser 70.

The first bypass valve 61 is installed on one end side and the first and second other end sides of the first bypass pipe 71 to correspond to each other, and controls the flow rate of the refrigerant passing through the first bypass pipe 71.

The second bypass pipe 81 is a pipe connected to the refrigerant pipe 55 and extending in the other direction. More specifically, one end is connected to the inlet side of the second evaporator 80 and extends, and is divided into a first other end and a second other end. The first other end is connected between the evaporator 54 and the second evaporator 80, and the second other end is connected to the outlet side of the evaporator 54.

The second bypass valve 62 is installed on one end side and the first and second other end sides of the second bypass pipe 81 to correspond to each other and controls the flow rate of the refrigerant passing through the second bypass pipe 81.

The first and second bypass valves 61 and 62 in the present invention may be automatically controlled by an algorithm program loaded in a control unit (not shown) or implemented by a computer.

According to the present invention, the refrigerant selectively passes through one or both of the condenser 52 and the second condenser 70 through at least one of the refrigerant pipe 55 and the first and second bypass pipes 71 and 81 according to the selective opening and closing operation of the first and second bypass valves 61 and 62 described above, while selectively passing through one or both of the evaporator 54 and the second evaporator 80. It is desirable to move

As shown in FIG. 3, the path R may be implemented as six paths R1, R2, R3, R4, R5, and R6.

The first path R1 is a path that bypasses the condenser 52 and passes through the second condenser 70 when the first bypass valve 61c at the second other end of the first bypass pipe 71 is closed while the first bypass valves 61a and 61b at one end and the first other end of the first bypass pipe 71 are opened.

The second path R2 is a path that bypasses the second condenser 70 while passing through the condenser 52 when the first bypass valve 61a at one end of the first bypass pipe 71 is closed and the first bypass valves 61b and 61c at the first and second other ends of the first bypass pipe 71 are opened.

The third path R3 is a path that passes through both the condenser 52 and the second condenser 70 when all of the first bypass valves 61a, 61b, and 61c at one end side and the first and second other ends of the first bypass pipe 71 are closed.

The fourth path R4 is a path that bypasses the second evaporator 80 and passes through the evaporator 54 when the second bypass valve 62c at the second other end of the second bypass pipe 81 is closed while the second bypass valves 62a and 62b at one end and the first other end of the second bypass pipe 81 are opened.

The fifth path R5 is a path that bypasses the evaporator 54 while passing through the second evaporator 80 when the second bypass valve 62a at one end of the second bypass pipe 81 is closed and the second bypass valves 62b and 62c at the first and second other ends of the second bypass pipe 81 are opened.

The sixth path R6 is a path that passes through both the evaporator 54 and the second evaporator 80 when the second bypass valves 62a, 62b, and 62c at one end side and the first and second other ends of the second bypass pipe 81 are all closed.

Detailed descriptions of the preferred embodiments of the present invention disclosed as described above are provided to enable those skilled in the art to implement and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the scope of the present invention. For example, those skilled in the art can use each configuration described in the above-described embodiments in a manner of combining with each other. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as limiting in all respects and should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention. The invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that do not have an explicit citation relationship in the claims may be combined to form an embodiment or may be included as new claims by amendment after filing.

10: liquefied hydrogen tank 20: fuel cell
30: pressure control valve 40: air fan
45: air pipe 50: heat pump
51: compressor 52: condenser
53: expansion device 54: evaporator
55: refrigerant pipe 60: fuel recovery machine
61: first bypass valve 61a: first a valve
61b: first b valve 61c: first c valve
62: second bypass valve 62a: 2a valve
62b: 2b valve 62c: 2c valve
70: second condenser 71: first bypass pipe
72: second air fan 73: second air pipe
80: second evaporator 81: second bypass pipe
82: 3rd air fan 83: 3rd air pipe
90: refrigerant cycle 100: hydrogen pipe
R: path small arrow: direction of refrigerant flow
Large arrow: direction of heat flow from high temperature to low temperature

Claims (8)

a heat pump having a compressor unit, a condenser, an expansion unit, and an evaporator;
A hydrogen pipe for vaporizing liquefied hydrogen while exchanging heat with the condenser;
a second condenser installed between the condenser and the expansion device; and
Including a second evaporator installed between the expansion device and the evaporator,
A first bypass pipe having one end connected to the inlet side of the condenser and extending to be divided into a first other end and a second other end, the first other end being connected between the condenser and the second condenser, and the second other end being connected to the outlet side of the second condenser;
first bypass valves installed on one end side and the other first and second end sides of the first bypass pipe to control flow rates;
A second bypass pipe having one end connected to the inlet side of the second evaporator and extending to be divided into a first other end and a second other end, the first other end being connected between the evaporator and the second evaporator, and the second other end being connected to the outlet side of the evaporator; and
A liquefied hydrogen vaporization system using a heat pump with a bypass pipe, characterized in that it further comprises a second bypass valve installed on one end side and the first and second other end sides of the second bypass pipe to control the flow rate, respectively.
According to claim 1,
The heat pump,
It is characterized in that it further comprises a refrigerant pipe for providing a refrigerant movement passage while continuously connecting the compressor device, the condenser, the expansion device and the evaporator,
The first and second bypass pipes,
Characterized in that it is connected to the refrigerant pipe,
The refrigerant is
Liquefied hydrogen vaporization system using a heat pump with a bypass pipe, characterized in that the refrigerant moves in a path selectively passing through one or both of the evaporator and the second evaporator while selectively passing through one or both of the condenser and the second condenser through at least one of the refrigerant pipe and the first and second bypass pipes according to the selective opening and closing operation of each of the first and second bypass valves.
According to claim 2,
The path is
When the first bypass valves at one end side and the first other end side of the first bypass pipe are opened and the first bypass valve at the second other end side of the first bypass pipe is closed, a first path bypassing the condenser and passing through the second condenser while not passing through the condenser;
a second path passing through the condenser and bypassing the second condenser when the first bypass valve at one end of the first bypass pipe is closed and the first bypass valve at the other ends of the first and second bypass pipes is opened;
a third path passing through both the condenser and the second condenser when the first bypass valves at one end of the first bypass pipe and at the other ends of the first and second pipes are closed;
When the second bypass valves at one end side and the other first end side of the second bypass pipe are opened and the second bypass valve at the second other end side of the second bypass pipe is closed, a fourth path bypassing the second evaporator and passing through the evaporator while not passing through the second bypass pipe;
a fifth path bypassing the evaporator while passing through the second evaporator when the second bypass valve at one end of the second bypass pipe is closed and the second bypass valve at the other ends of the second bypass pipe 1 and 2 is opened; and
When the second bypass valves at one end side of the second bypass pipe and at the other ends of the first and second ends are both closed, a sixth path passing through both the evaporator and the second evaporator is provided. Liquefied hydrogen vaporization system using a heat pump.
According to claim 1,
an air pipe for exchanging heat in the evaporator via a fuel cell; and
A liquefied hydrogen vaporization system using a heat pump introduced with a bypass pipe, characterized in that it further comprises an air fan installed on the air pipe.
According to claim 1,
a second air pipe for exchanging heat in the second condenser; and
A liquefied hydrogen vaporization system using a heat pump introduced with a bypass pipe, further comprising a second air fan installed on the second air pipe.
According to claim 1,
a third air pipe for exchanging heat in the second evaporator; and
A liquefied hydrogen vaporization system using a heat pump introduced with a bypass pipe, further comprising a third air fan installed on the third air pipe.
According to claim 1,
The hydrogen pipe,
A liquefied hydrogen vaporization system using a heat pump introduced with a bypass pipe, further comprising a pressure control valve for controlling the pressure of the vaporized hydrogen to be constant.
According to claim 7,
Gaseous hydrogen discharged at a constant pressure by the pressure control valve,
A liquid hydrogen vaporization system using a heat pump introduced with a bypass pipe, characterized in that supplied to a fuel cell.