KR102379133B1 - Liquid hydrogen station - Google Patents

Abstract

The present invention relates to a liquid hydrogen filling station, wherein the liquid hydrogen filling station according to the present invention is a liquid hydrogen filling station that vaporizes stored liquid hydrogen into high-pressure gaseous hydrogen and supplies it, a liquid hydrogen storage tank for storing liquid hydrogen, the liquid hydrogen A liquid hydrogen high-pressure pump for pressurizing and discharging liquid hydrogen stored in a storage tank, a liquid hydrogen vaporizer for vaporizing high-pressure liquid hydrogen discharged from the liquid hydrogen high-pressure pump, and cooling heat of vaporized gaseous hydrogen disposed behind the vaporizer and a first heat exchanger configured to heat the gaseous hydrogen by exchanging the air with the supplied air.

Description

Liquid hydrogen filling station {LIQUID HYDROGEN STATION}

The present invention relates to a liquid hydrogen filling station, and more particularly, a liquid hydrogen filling station supplying gaseous hydrogen to a hydrogen vehicle driving hydrogen as fuel by vaporizing liquid hydrogen stored in a liquid state, a fuel cell generator, or a vehicle carrying hydrogen is about

Liquid hydrogen charging stations store hydrogen in a liquid state at -253°C and, when supplying it to customers (hydrogen vehicles driven by hydrogen as fuel, fuel cell generators, vehicles carrying hydrogen, etc.), liquid hydrogen is converted into gaseous hydrogen at room temperature and high pressure It is a charging station that converts and supplies

Since liquid hydrogen filling stations can store and supply a large amount of hydrogen compared to gaseous hydrogen filling stations, it is expected to replace existing gaseous hydrogen filling stations when the hydrogen economy is activated.

1 is a diagram showing the configuration of a conventional liquid hydrogen filling station.

Liquefied liquid hydrogen is stored in the liquid hydrogen storage tank 10 , and the liquid hydrogen stored in the liquid hydrogen storage tank 10 is pressurized to a high pressure by the liquid hydrogen high-pressure pump 20 and discharged, and the discharged liquid hydrogen is liquid It is vaporized in the hydrogen vaporizer 30 and is supplied to the consumer as gaseous hydrogen at room temperature and high pressure. On the other hand, the boil-off gas vaporized in the liquid hydrogen storage tank 10 by external heat inflow is heated by the boil-off gas heater 40 outside the liquid hydrogen storage tank 10, and the boil-off gas high pressure It can be compressed by the compressor 50 and supplied to the consumer at room temperature and high pressure.

In the above-described conventional liquid hydrogen filling station, when liquid hydrogen is converted into gaseous hydrogen at room temperature, energy consumption by the liquid hydrogen vaporizer 30 and the boil-off gas heater is large and the cooling heat of liquid hydrogen is discarded.

Republic of Korea Patent Publication No. 2018-0138214

Accordingly, an object of the present invention is to solve the conventional problems, minimize the energy used to convert liquid hydrogen into gaseous hydrogen at room temperature and high pressure in the liquid hydrogen filling station, and liquid hydrogen that can utilize the cooling heat in the conversion process To provide a charging station.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The above object, according to the present invention, in the liquid hydrogen filling station for supplying by vaporizing the stored liquid hydrogen into high-pressure gaseous hydrogen, a liquid hydrogen storage tank for storing liquid hydrogen; a liquid hydrogen high-pressure pump for pressurizing and discharging liquid hydrogen stored in the liquid hydrogen storage tank; a liquid hydrogen vaporizer for vaporizing the high-pressure liquid hydrogen discharged from the liquid hydrogen high-pressure pump; And disposed at the rear of the vaporizer can be achieved by a liquid hydrogen filling station comprising a first heat exchanger for exchanging the cold heat of vaporized gaseous hydrogen and supplied air to increase the temperature of the gaseous hydrogen.

Here, the liquid hydrogen vaporizer may heat the vaporized hydrogen gas to a temperature required to liquefy the air, and the air supplied to the first heat exchanger may be liquefied by heat exchange with the gaseous hydrogen.

Here, a liquid air storage tank for storing the liquefied liquid air; And the liquid air stored in the liquid air storage tank may further include an air turbine for generating electricity by the vaporized air.

Here, a liquid air high-pressure pump for pressurizing and discharging the liquid air stored in the liquid air storage tank; and a second heat exchanger disposed between the liquid air high-pressure pump and the air turbine to exchange heat between cooling heat of liquid air and air discharged through the air turbine.

Here, the air discharged from the air turbine and cooled in the second heat exchanger may be supplied to a facility for refrigeration, freezing or air conditioning and reused.

Here, a liquid air high-pressure pump for pressurizing and discharging the liquid air stored in the liquid air storage tank; a cooling and heat storage device disposed between the liquid air high-pressure pump and the air turbine to store cooling heat of liquid air discharged from the liquid air high-pressure pump, and to use the stored cooling heat to cool the compressed air supplied by an air compressor; and an expansion valve for supplying liquid air to the liquid air storage tank by expanding the air cooled in the cooling and heat storage device to generate liquid air.

Here, further comprising a gas-liquid separator formed between the liquid air storage tank and the expansion valve, the liquid air separated from the gas-liquid separator is supplied to the liquid air storage tank, and the gaseous air separated in the gas-liquid separator is the It may be re-introduced to the air compressor through the cold-heat storage device.

Here, the compressed air supplied from the air compressor may be branched and supplied to the first heat exchanger or the cold heat storage device.

Here, the air discharged from the air turbine may be supplied to a facility for air conditioning and reused.

Here, the method further includes a boil-off gas heater for receiving and heating boil-off gas generated in the liquid hydrogen storage tank by external heat inflow, wherein the boil-off gas heated in the boil-off gas heater flows into the first heat exchanger and flows into the first heat exchanger. 1 It is possible to perform heat exchange with the air supplied to the heat exchanger.

Here, the BOG heater may heat the BOG to a temperature required to liquefy the air, and the air supplied to the first heat exchanger may be liquefied by heat exchange with the BOG.

Here, it may further include a boil-off gas high-pressure compressor for compressing the boil-off gas heated in the first heat exchanger to a high pressure.

According to the liquid hydrogen filling station of the present invention as described above, since gaseous hydrogen can be heated to room temperature by heat exchange with the air supplied to the heat exchanger, the amount of energy supplied to the liquid hydrogen vaporizer and the boil-off gas heater can be minimized.

In addition, there is an advantage that liquid air can be generated by using the cooling heat of liquid hydrogen discarded during the hydrogen filling process of the liquid hydrogen filling station and used for power generation.

In addition, there is an advantage that low-temperature, clean air can be used for refrigeration or freezing of food, cooling and air conditioning of downtown commercial districts and large-scale public facilities through the cooling and heat recovery process after power generation using liquid air.

In addition, by storing the cooling heat of liquid air generated in the process of generating electricity by vaporizing liquid air in a cooling/heating storage device, and using the stored cooling heat to generate liquid air, even when the cooling heat by hydrogen charging cannot be utilized, liquid air There is also the advantage of being able to create

1 is a diagram showing the configuration of a conventional liquid hydrogen filling station.
2 is a block diagram of a liquid hydrogen filling station according to an embodiment of the present invention.
FIG. 3 is a view for explaining the liquid hydrogen filling operation in FIG. 2 .
FIG. 4 is a view for explaining a power generation operation using liquid air in FIG. 2 .
5 is a configuration diagram of a liquid hydrogen filling station according to another embodiment of the present invention.
6 is a view for explaining the liquid hydrogen filling operation in FIG. 5 .
7 is a view for explaining a power generation operation using liquid air in FIG. 5 .
FIG. 8 is a view for explaining an operation of generating liquid air using the cooling and heat storage device in FIG. 5 .

The specific details of the embodiments are included in the detailed description and drawings.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout

Hereinafter, the present invention will be described with reference to the drawings for explaining the liquid hydrogen filling station according to embodiments of the present invention.

2 is a block diagram of a liquid hydrogen filling station according to an embodiment of the present invention, FIG. 3 is a diagram for explaining the liquid hydrogen filling operation in FIG. 2, and FIG. 4 is a power generation operation using liquid air in FIG. 2 is a drawing that

In the present invention, the liquid hydrogen charging station vaporizes liquid hydrogen stored in a liquid state to supply hydrogen to customers such as hydrogen vehicles that drive hydrogen as fuel in the form of gaseous hydrogen, fuel cell generators, and vehicles that transport hydrogen. charging station for

The liquid hydrogen filling station according to an embodiment of the present invention may include a liquid hydrogen storage tank 110 , a liquid hydrogen high pressure pump 120 , a liquid hydrogen vaporizer 130 , and a first heat exchanger 160 . In addition, the liquid air storage tank 210 and the liquid air storage tank 210 may further include a power generation facility using the liquid air stored in the energy source.

The liquid hydrogen storage tank 110 stores liquid hydrogen liquefied at a cryogenic temperature (-253° C.). The liquid hydrogen storage tank 110 may be formed as a storage tank insulated so that liquid hydrogen can maintain a liquid state.

The liquid hydrogen high pressure pump 120 pressurizes the liquid hydrogen stored in the liquid hydrogen storage tank 110 to a pressure of about 350 to 700 bar and discharges it.

The liquid hydrogen vaporizer 130 vaporizes the liquid hydrogen discharged by being pressurized to a high pressure from the liquid hydrogen high pressure pump 120 to generate gaseous hydrogen. At this time, in the liquid hydrogen vaporizer 130, it is preferable to heat the gaseous hydrogen to a temperature suitable for cooling heat utilization in the first heat exchanger 160 located at the rear. As will be described later, the first heat exchanger 160 liquefies the air flowing into the first heat exchanger 160 by utilizing the cooling heat of gaseous hydrogen passing through the first heat exchanger 160 to generate liquid air. Therefore, in the liquid hydrogen vaporizer 130, it is preferable to heat the gaseous hydrogen to a temperature required for air liquefaction (-193° C.) in the first heat exchanger 160 to raise the temperature.

In the first heat exchanger 160 , heat exchange is performed between gaseous hydrogen flowing in from the liquid hydrogen vaporizer 130 and air flowing in from the blower 170 . The gaseous hydrogen introduced into the first heat exchanger 160 through heat exchange is heated to room temperature and high-pressure hydrogen gas supplied to the demand side, and the air introduced into the first heat exchanger 160 is liquefied by the cooling heat of the gaseous hydrogen to be liquid air. can be phase-changed to

In addition, in spite of the insulation treatment, there is a boil-off gas (Boil-Off Gas) inside the liquid hydrogen storage tank 110 due to the heat introduced from the outside (the vaporized gas is also gaseous hydrogen, but gaseous hydrogen vaporized in the liquid hydrogen vaporizer 130) and (called boil-off gas) may be generated. This is a factor for increasing the internal pressure of the liquid hydrogen storage tank 110 and must be discharged to the outside of the liquid hydrogen storage tank 110 to be processed. The boil-off gas heater 140 receives the boil-off gas evaporated in the liquid hydrogen storage tank 110 and heats it. At this time, it is preferable to heat the boil-off gas to a temperature suitable for cooling and heat utilization in the first heat exchanger 160 located at the rear of the boil-off gas heater 140 as well. That is, it is preferable to heat the first heat exchanger 160 to a temperature required for air liquefaction.

The boil-off gas heated by the boil-off gas heater 140 also flows into the first heat exchanger 160 and is heated by heat exchange with air flowing into the first heat exchanger 160, and the cooling heat of the boil-off gas is transferred to the first heat exchanger. It can be used to liquefy the air entering 160.

The boil-off gas high-pressure compressor 150 compresses the boil-off gas heated in the first heat exchanger 160 to a high pressure (pressure of about 350 to 700 bar). BOG compressed at a high pressure in the BOG high pressure compressor 150 may be vaporized in the liquid hydrogen vaporizer 130 and supplied together with gaseous hydrogen treated thereto.

As described above, in the present invention, since gaseous hydrogen can be heated by heat exchange with air flowing into the first heat exchanger 160 , the amount of energy supplied to the liquid hydrogen vaporizer 130 and the boil-off gas heater 140 is minimized. can do

Liquid air generated by heat exchange in the first heat exchanger 160 may be stored in the liquid air storage tank 210 and used as an energy source for power generation. Since particles, moisture, carbon dioxide, etc. must be removed from the air used when generating power using liquid air, the air supplied from the blower 170 is supplied by a separate pre-processing device (not shown) to remove particles, moisture, carbon dioxide, etc. This can be removed.

Power generation using liquid air liquefies air, stores it in the form of low-temperature energy, and when necessary, vaporizes liquid air into gaseous air to run an air turbine. Power generation using liquid air uses high-density liquid air at atmospheric pressure as an energy storage medium, so it is eco-friendly, safe, and capable of storing large amounts of energy.

However, since a lot of energy is used to liquefy the air, there is a problem in that the charging/discharging efficiency of the energy storage facility using liquid air is low. Therefore, it is necessary to lower the energy cost for air liquefaction. In the present invention, as described above, liquid air can be generated by utilizing the cooling heat of gaseous hydrogen or boil-off gas in the first heat exchanger 160 .

The liquid air storage tank 210 stores liquid air liquefied by heat exchange with the cold heat of gaseous hydrogen or boil-off gas in the first heat exchanger 160 . The liquid air storage tank 210 may be formed as a storage tank insulated so that the liquid air can maintain a liquid state.

The liquid air high pressure pump 220 pressurizes the liquid air stored in the liquid air storage tank 210 to a high pressure and discharges it. The discharged liquid air is heated and vaporized by the air heater 240 , and the vaporized gas air is supplied to the air turbine 250 to generate electricity.

At this time, in the present invention, the second heat exchanger 230 may be disposed behind the liquid air high pressure pump 220 . In the second heat exchanger 230 , the high pressure liquid air discharged from the liquid air high pressure pump 220 is The cold heat that has been passed through the air turbine 250 is recovered by heat exchange. Accordingly, the cold clean air recovered from the cold heat in the second heat exchanger 230 may be reused as cold heat for freezing or refrigeration of food, and air conditioning in downtown commercial districts or large public facilities.

In FIG. 3, the liquid hydrogen filling operation is shown by a thick arrow. The liquid hydrogen stored in the liquid hydrogen storage tank 110 is discharged by being pressurized to a high pressure by the liquid hydrogen high pressure pump 120 and heated by the liquid hydrogen vaporizer 130 to form a gaseous hydrogen state in the first heat exchanger 160 . is supplied to

In addition, the BOG evaporated in the liquid hydrogen storage tank 110 due to external heat inflow is heated by the BOG heater 140 and supplied to the first heat exchanger 160 .

At this time, it is preferable to raise the temperature of the gaseous hydrogen and boil-off gas heated by the liquid hydrogen vaporizer 130 and the boil-off gas heater 140 to a temperature required to liquefy the air flowing into the first heat exchanger 160 .

The gaseous hydrogen that has passed through the first heat exchanger 160 may be supplied to a consumer as gaseous hydrogen at room temperature and high pressure. On the other hand, the boil-off gas may be pressurized by the boil-off gas high-pressure compressor 150 behind the first heat exchanger 160 and supplied to a demanding place.

The air flowing into the first heat exchanger 160 is liquefied by the cooling heat of gaseous hydrogen and boil-off gas to be converted into liquid air, and the liquid air may be stored in the liquid air storage tank 210 . In this way, the amount of heat energy supplied to the liquid hydrogen vaporizer 130 and the boil-off gas heater 140 is minimized by applying heat energy to gaseous hydrogen and boil-off gas by heat exchange with air in the first heat exchanger 160 . can do In addition, since liquid air, which is an energy storage medium for power generation, can be generated through heat exchange in the first heat exchanger 160, the cooling heat generated in the process of changing liquid hydrogen into gaseous hydrogen can be utilized.

In Figure 4, the operation of power generation using liquid air is shown by a thick arrow.

The liquid air high pressure pump 220 pressurizes the liquid air in the liquid air storage tank 210 to a high pressure and discharges it. The discharged liquid air is heated and vaporized by the air heater 240 , and the vaporized air rotates the air turbine 250 to generate electricity.

On the other hand, the second heat exchanger 230 may be disposed behind the liquid air high pressure pump 220 , and the liquid air discharged from the liquid air high pressure pump 220 and introduced into the second heat exchanger 230 and the air turbine ( 250), the air undergoes heat exchange. Accordingly, the liquid air discharged from the liquid air air pump 220 by the heat exchange can be vaporized, and the air that has passed through the air turbine 250 recovers and cools the cold heat, thereby refrigeration or refrigeration of food, downtown commercial districts or large-scale commercial districts. It can be reused as cooling heat for air conditioning in public facilities.

Hereinafter, a liquid hydrogen filling station according to another embodiment of the present invention will be described with reference to FIGS. 5 to 8 .

5 is a block diagram of a liquid hydrogen filling station according to another embodiment of the present invention, FIG. 6 is a diagram for explaining the liquid hydrogen filling operation in FIG. 5, and FIG. 7 is a power generation operation using liquid air in FIG. FIG. 8 is a view for explaining an operation of generating liquid air using the cooling and heat storage device in FIG. 5 .

In the following description, the difference from the above-described embodiment will be mainly described with reference to FIGS. 2 to 4 .

In this embodiment, the liquid hydrogen storage tank 110 , the liquid hydrogen high pressure pump 120 , the liquid hydrogen vaporizer 130 , the boil-off gas heater 140 , the first heat exchanger 160 and the boil-off gas high-pressure compressor 150 are provided. A configuration in which liquid hydrogen is converted into gaseous hydrogen using gaseous hydrogen to supply gaseous hydrogen to a consumer, and the air flowing into the first heat exchanger 160 is supplied to the first heat exchanger 160 by the cooling heat of gaseous hydrogen and boil-off gas. The cooling and liquefying configuration is the same as in the above-described embodiment.

The cooling and heat storage device 260 stores the cooling heat of the liquid air when the liquid air discharged at high pressure through the liquid air high-pressure pump 220 passes during the power generation operation using liquid air. Liquid air may be vaporized by the cold heat storage device 260 and the air heater 240 at the rear of the cold heat storage device 260 , and the air vaporized at high pressure turns the air turbine 250 to generate electricity.

At this time, in the present embodiment, clean air at room temperature or slightly lower than room temperature passing through the air turbine 250 may be reused for air conditioning in commercial districts or large public facilities in the city center.

The cold heat stored in the cold heat storage device 260 may be reused when filling liquid air. In this embodiment, even when the filling process of liquid hydrogen is stopped or liquid hydrogen cannot be generated through the first heat exchanger 160 because liquid hydrogen is exhausted, liquid air is heated using the cold heat stored in the cold heat storage device 260 . can create

Air compressed at high pressure from the air compressor 175 is introduced into the cooling and heat storage device 260 . At this time, the compressed air from the air compressor 175 may be branched and supplied to the first heat exchanger 160 or the cold-heat storage device 260 . Each of the connecting pipes is provided with valves 292 and 294 to convert liquid hydrogen stored in the liquid hydrogen storage tank 110 into gaseous hydrogen and supply compressed air to the first heat exchanger 160 when supplying it to a consumer. When the valves 292 and 294 are controlled so that liquid air is generated using the cold heat storage device 260 separately from the operation of the first heat exchanger 160, compressed air is supplied to the cold heat storage device 260. The valves 292 and 294 can be controlled so that the

The air compressed to a high pressure by the air compressor 175 is introduced into the cold-heat storage device 260, and can be cooled using the cold heat of the cold-heat storage device 260 stored in advance in the process of power generation using liquid air.

The air cooled in the cooling and heat storage device 260 is liquefied through the expansion valve 270 to generate liquid air, and the generated liquid air may be stored in the liquid air storage tank 210 .

Meanwhile, a gas-liquid separator 280 may be disposed between the liquid air storage tank 210 and the cold-heat storage device 260 . The high-pressure gas air that has not been liquefied through the expansion valve 270 is separated through the gas-liquid separator 280 , passes through the cooling and heat storage device 260 again, and re-introduced into the air compressor 175 to attempt liquefaction again.

In addition, as illustrated, the liquid air introduced through the first heat exchanger 160 also passes through the gas-liquid separator 280 , so that the air that is not liquefied can be re-introduced into the air compressor 175 .

In FIG. 6 , the liquid hydrogen filling operation is shown by thick arrows in relation to the present embodiment.

The operation of generating liquid air in the first heat exchanger 160 by utilizing cold heat in the process of converting liquid hydrogen stored in the liquid hydrogen storage tank 110 into gaseous hydrogen is the same as described above with reference to FIG. 3 .

During the filling process of liquid hydrogen, the compressed air pressurized by the air compressor 175 is supplied to the first heat exchanger 160 , and the liquid air generated in the first heat exchanger 160 is stored in the liquid air storage tank 210 . Therefore, the valves 292 and 296 disposed between the air compressor 175 and the first heat exchanger 160 and between the first heat exchanger 160 and the liquid air storage tank 210 are opened, and the air compressor 175 is opened. and the valve 294 disposed between the cooling and heat storage device 260 is closed.

The liquid air generated in the first heat exchanger 160 passes through the gas-liquid separator 280 , and the gas air that is not liquefied in the first heat exchanger 160 is separated in the gas-liquid separator 280 and a cold-heat storage device 260 . ), it may be re-introduced into the first heat exchanger 160 through the air compressor 175 .

On the other hand, the liquid air separated in the gas-liquid separator 280 is stored in the liquid air storage tank (210).

In FIG. 7, a power generation operation using liquid air is shown by a thick arrow.

The liquid air high pressure pump 220 pressurizes the liquid air in the liquid air storage tank 210 to a high pressure and discharges it. The discharged liquid air passes through the cooling and heat storage device 260 and the cooling heat of the liquid air is stored in the cooling and heat storage device 260 .

The air that has passed through the cooling and heat storage device 260 is further heated by the air heater 240 , and the heated gas air rotates the air turbine 250 to generate power.

Clean air at room temperature or slightly lower than room temperature discharged through the air turbine 250 may be reused for air conditioning in downtown commercial districts or large public facilities.

In FIG. 8 , an operation of generating liquid air using the cooling and heat storage device 260 is shown by a thick arrow.

In this embodiment, even when the filling process of liquid hydrogen is stopped or liquid hydrogen cannot be generated through the first heat exchanger 160 because liquid hydrogen is exhausted, liquid air is heated using the cold heat stored in the cold heat storage device 260 . can be created

At this time, as opposed to FIG. 6 , the valves 292 and 296 disposed between the air compressor 175 and the first heat exchanger 160 and between the first heat exchanger 160 and the liquid air storage tank 210 are closed, and the air The valve 294 disposed between the compressor 175 and the cold storage device 260 is opened.

The air pressurized and compressed in the air compressor 175 is cooled using the cold heat stored in advance in the cold heat storage device 260 in the process of power generation using liquid air. Air cooled in the cold storage device 260 may be expanded under reduced pressure through the expansion valve 270 to be liquefied.

The gas-liquid separator 280 separates liquefied liquid air and partially non-liquefied gas air through the expansion valve 270 , and the separated liquid air is stored in the liquid air storage tank 210 . On the other hand, the gas air separated in the gas-liquid separator 280 passes through the cooling and heat storage device 260 again and re-introduced into the air compressor 175 to attempt liquefaction again.

Meanwhile, although not shown, in the liquid hydrogen filling process, liquid air generation in the first heat exchanger 160 and liquid air generation using the cooling heat storage device 260 may be simultaneously performed.

The scope of the present invention is not limited to the above-described embodiments, but may be implemented in various types of embodiments within the scope of the appended claims. Without departing from the gist of the present invention claimed in the claims, it is considered to be within the scope of the description of the claims of the present invention to various extents that can be modified by any person skilled in the art to which the invention pertains.

110: liquid hydrogen storage tank
120: liquid hydrogen high pressure pump
130: liquid hydrogen vaporizer
140: boil-off gas heater
150: boil-off gas high pressure compressor
160: first heat exchanger
170: blower
175: air compressor
210: liquid air storage tank
220: liquid air high pressure pump
230: second heat exchanger
240: air heater
250: air turbine
260: cold storage device
270: expansion valve
280: gas-liquid separator
292, 294, 296: valve

Claims (12)

In the liquid hydrogen filling station for supplying the stored liquid hydrogen by vaporizing it into gaseous hydrogen at high pressure,
Liquid hydrogen storage tank for storing liquid hydrogen;
a liquid hydrogen high-pressure pump for pressurizing and discharging liquid hydrogen stored in the liquid hydrogen storage tank;
a liquid hydrogen vaporizer for vaporizing the high-pressure liquid hydrogen discharged from the liquid hydrogen high-pressure pump;
a first heat exchanger disposed at the rear of the liquid hydrogen vaporizer to heat-exchange the cold heat of vaporized gaseous hydrogen and supplied air to increase the temperature of the gaseous hydrogen;
a liquid air storage tank for storing the liquefied liquid air;
an air turbine in which the liquid air stored in the liquid air storage tank generates electricity by vaporized air;
a liquid air high-pressure pump for pressurizing and discharging the liquid air stored in the liquid air storage tank;
a cooling and heat storage device disposed between the liquid air high-pressure pump and the air turbine to store cooling heat of liquid air discharged from the liquid air high-pressure pump, and to use the stored cooling heat to cool the compressed air supplied by an air compressor; and
and an expansion valve for supplying liquid air to the liquid air storage tank by expanding the air cooled in the cooling and heat storage device to generate liquid air,
The liquid hydrogen vaporizer heats vaporized gaseous hydrogen to a temperature required to liquefy the air, and the air supplied to the first heat exchanger is liquefied by heat exchange with the gaseous hydrogen. delete delete The method of claim 1,
a liquid air high-pressure pump for pressurizing and discharging the liquid air stored in the liquid air storage tank; and
The liquid hydrogen filling station further comprising a second heat exchanger disposed between the liquid air high-pressure pump and the air turbine to exchange heat between cooling heat of liquid air and air discharged through the air turbine. 5. The method of claim 4,
Liquid hydrogen filling station where the air discharged from the air turbine and cooled in the second heat exchanger is supplied to a facility for refrigeration, freezing or air conditioning and reused. delete The method of claim 1,
Further comprising a gas-liquid separator formed between the liquid air storage tank and the expansion valve,
The liquid air separated in the gas-liquid separator is supplied to the liquid air storage tank, and the gas air separated in the gas-liquid separator passes through the cooling and heat storage device and re-introduced into the air compressor. The method of claim 1,
The air compressed and supplied from the air compressor is branched and supplied to the first heat exchanger or the cold-heat storage device. The method of claim 1,
Liquid hydrogen filling station where the air discharged from the air turbine is supplied to a facility for air conditioning and reused. The method of claim 1,
Further comprising a boil-off gas heater for heating by receiving the boil-off gas generated in the liquid hydrogen storage tank by the inflow of external heat,
The boil-off gas heated in the boil-off gas heater flows into the first heat exchanger to perform heat exchange with the air supplied to the first heat exchanger. 11. The method of claim 10,
The boil-off gas heater heats the boil-off gas to a temperature required to liquefy the air, and the air supplied to the first heat exchanger is liquefied by heat exchange with the boil-off gas. 11. The method of claim 10,
Liquid hydrogen filling station further comprising a boil-off gas high pressure compressor for compressing the boil-off gas heated in the first heat exchanger to a high pressure.

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