Hydrogen circulation system and hydrogen station

Abstract

To realize a sustainable hydrogen society in an area or space that lacks water.SOLUTION: A hydrogen circulation system 100 comprises: a fuel cell vehicle 10 which includes a fuel cell 11 using hydrogen as fuel and stores water generated in the power generation of the fuel cell 11; a hydrogen supply unit 20 which supplies hydrogen to the fuel cell vehicle 10; and a hydrogen generation unit 30 which recovers water stored in the fuel cell vehicle 10, generates hydrogen by using the recovered water and supplies the generated hydrogen to the hydrogen supply unit 20 as hydrogen for fuel cell vehicle supply.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a hydrogen circulation system for a fuel cell, in particular, a hydrogen circulation system for a fuel cell mounted on a fuel cell vehicle, and the configuration of a hydrogen station that fills a fuel cell vehicle with hydrogen. [Background technology]

[0002] Electricity and hydrogen supply systems that can supply electric vehicles and fuel cell vehicles with electricity and hydrogen stably and autonomously by using renewable energy have been proposed.

[0003] For example, Patent Document 1 discloses a hydrogen power supply system that uses renewable energy to electrolyze water to produce hydrogen and supplies it to a fuel cell vehicle, or generates electricity using a hydrogen power generation device that drives a generator with a fuel cell that uses hydrogen as fuel or a hydrogen engine, and supplies the electricity to an electric vehicle. This hydrogen power supply system discloses that renewable energy is used to electrolyze water produced in a fuel cell or hydrogen engine to produce hydrogen, and the produced hydrogen is reused in the fuel cell or hydrogen engine. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-122399 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, water shortages are a concern as the population increases. Water is always in short supply in dry areas such as deserts. Furthermore, if humans advance into outer space, such as the surface of the moon, in the future, water will be in extreme short supply.

[0006] However, the system described in Patent Document 1 only supplies hydrogen to the fuel cell vehicle and does not recover water generated in the fuel cell vehicle, leaving room for improvement in order to realize a sustainable hydrogen society in areas or spaces where water is scarce.

[0007] Therefore, an object of the present invention is to realize a sustainable hydrogen society in areas or spaces where water is scarce. [Means for solving the problem]

[0008] The hydrogen circulation system disclosed herein includes a fuel cell vehicle equipped with a fuel cell that uses hydrogen as fuel and stores water produced during power generation by the fuel cell, a hydrogen supply unit that supplies hydrogen to the fuel cell vehicle, and a water recovery unit that recovers the water stored in the fuel cell vehicle. The collected water is then stored in a recovered water tank. a hydrogen generation unit that generates hydrogen using water and supplies the generated hydrogen to the hydrogen supply unit as hydrogen to be supplied to a fuel cell vehicle; a hydrogen station in which the hydrogen supply unit is installed and which fills the fuel cell vehicle with hydrogen, the hydrogen generation unit being installed in the hydrogen station, the hydrogen supply unit including a dispenser which fills the fuel cell vehicle with hydrogen and recovers water from the fuel cell vehicle, a composite pipe which integrates a hydrogen filling pipe which fills the fuel cell vehicle with hydrogen and a water recovery pipe which recovers water stored in the fuel cell vehicle, and a suction pump which is connected to the water recovery pipe and sucks out the water recovered from the fuel cell and transfers it to the recovered water tank, the hydrogen generation unit recovers water stored in the fuel cell vehicle via the dispenser, the water recovery pipe, and the suction pump, and stores it in the recovered water tank. The present invention is characterized by the following.

[0009] In this way, water produced during power generation by the fuel cell vehicle is recovered to produce hydrogen, which is then reused in the fuel cell vehicle, thereby making it possible to realize a sustainable hydrogen society in areas or spaces where water is scarce. Furthermore, by providing a hydrogen generation unit and a hydrogen supply unit together in a hydrogen station, water can be collected from the fuel cell vehicle when the fuel cell vehicle is filled with hydrogen, and water generated in the fuel cell mounted on the fuel cell vehicle can be efficiently collected. This also allows water stored in the fuel cell vehicle to be collected in a simple manner.

[0014] The hydrogen circulation system of the present disclosure includes a fuel cell vehicle equipped with a fuel cell that uses hydrogen as fuel and stores water produced during power generation by the fuel cell; Water received from outside and water recovered from the fuel cell vehicle a hydrogen generation and supply unit that generates hydrogen using water and supplies the generated hydrogen to the fuel cell vehicle; and a hydrogen generation and supply unit that recovers water stored in the fuel cell vehicle. The collected water is stored in a recovered water tank. a water recovery unit that supplies water to the hydrogen generation and supply unit; a hydrogen station in which the hydrogen generation and supply unit is installed and which fills the fuel cell vehicle with hydrogen, the water recovery unit being installed within the hydrogen station, the hydrogen generation and supply unit comprising a pure water tank for storing pure water delivered from an external source, a water electrolysis device for generating hydrogen and oxygen by electrolyzing the pure water stored in the pure water tank using power supplied from an external source, a compressor for compressing the hydrogen generated by the water electrolysis device, a high-pressure hydrogen tank filled with high-pressure hydrogen compressed by the compressor, and a dispenser that fills the fuel cell vehicle with hydrogen and recovers water from the fuel cell vehicle, a composite pipe that integrates a hydrogen filling pipe that fills the fuel cell vehicle with hydrogen and a water recovery pipe that recovers water stored in the fuel cell vehicle, and a suction pump that is connected to the water recovery pipe and sucks out the water recovered from the fuel cell and transfers it to the recovered water tank, wherein the water recovery unit recovers water stored in the fuel cell vehicle via the dispenser, the water recovery pipe, and the suction pump and stores it in the recovered water tank, and transfers the water stored in the recovered water tank to the pure water tank, It is characterized by:

[0015] In this way, water produced during power generation by the fuel cell vehicle is recovered to produce hydrogen, which is then reused in the fuel cell vehicle, thereby making it possible to realize a sustainable hydrogen society in areas or spaces where water is scarce. In addition, by providing a hydrogen generation and supply unit and a water recovery unit together in a hydrogen station, water can be recovered from the fuel cell vehicle when the fuel cell vehicle is filled with hydrogen, and water generated in the fuel cell mounted on the fuel cell vehicle can be efficiently recovered. This also allows water stored in the fuel cell vehicle to be recovered in a simple manner.

[0020] The hydrogen circulation system of the present disclosure includes a fuel cell vehicle equipped with a fuel cell that uses hydrogen as fuel and stores water produced during power generation by the fuel cell; Water received from outside and water recovered from the fuel cell vehicle Water and 、 and a hydrogen generation and supply unit that generates hydrogen using the hydrogen and supplies the generated hydrogen to the fuel cell vehicle. A hydrogen circulation system comprising: The hydrogen generation and supply unit comprises: A pure water tank for storing pure water delivered from an external source, a water electrolysis device for generating hydrogen and oxygen by electrolyzing the pure water stored in the pure water tank using power supplied from an external source, a compressor for compressing the hydrogen generated by the water electrolysis device, a high-pressure hydrogen tank filled with high-pressure hydrogen compressed by the compressor, and A dispenser for filling the fuel cell vehicle with hydrogen and recovering water from the fuel cell vehicle. a composite pipe integrating a hydrogen filling pipe for filling the fuel cell vehicle with hydrogen and a water recovery pipe for recovering water stored in the fuel cell vehicle, and a suction pump connected to the water recovery pipe for sucking out the water recovered from the fuel cell and transferring it to the pure water tank; The present invention is characterized by comprising:

[0021] In this way, water recovered from the fuel cell vehicle is supplied to the hydrogen generation and supply unit, which generates hydrogen to be supplied to the fuel cell vehicle, for use in hydrogen generation. This makes it possible to recover water generated during power generation by the fuel cell vehicle and generate hydrogen with a simple configuration. This also makes it possible to recover water stored in the fuel cell vehicle in a simple manner. .

[0024] The hydrogen station disclosed herein is The vehicle is equipped with a hydrogen fuel cell and stores water generated during power generation by the fuel cell. A hydrogen station that fills fuel cell vehicles with hydrogen. a hydrogen supply unit which supplies hydrogen to the fuel cell vehicle; and a hydrogen generation unit which recovers water from the fuel cell vehicle and stores it in a recovered water tank, generates hydrogen using the water stored in the recovered water tank, and supplies the generated hydrogen to the hydrogen supply unit, wherein the hydrogen supply unit includes a dispenser which fills the fuel cell vehicle with hydrogen and recovers water from the fuel cell vehicle, a composite pipe which integrates a hydrogen filling pipe which fills the fuel cell vehicle with hydrogen and a water recovery pipe which recovers the water stored in the fuel cell vehicle, and a suction pump which is connected to the water recovery pipe and sucks out the water recovered from the fuel cell and transfers it to the recovered water tank, and the hydrogen generation unit recovers water stored in the fuel cell vehicle via the dispenser, the water recovery pipe, and the suction pump, and stores it in the recovered water tank, It is characterized by:

[0025] Hydrogen station of the present disclosure is a hydrogen station which fills hydrogen into a fuel cell vehicle which is equipped with a fuel cell that uses hydrogen as fuel and which stores water produced during power generation by the fuel cell, the station comprising: a hydrogen generation and supply unit which generates hydrogen using water received from outside and water recovered from the fuel cell vehicle and supplies the generated hydrogen to the fuel cell vehicle; and a water recovery unit which recovers water from the fuel cell vehicle and stores it in a recovered water tank and supplies the water stored in the recovered water tank to the hydrogen generation and supply unit, the hydrogen generation and supply unit comprising a pure water tank which stores pure water delivered from outside, a water electrolysis device which electrolyzes the pure water stored in the pure water tank using power supplied from outside to generate hydrogen and oxygen, and a compressor which compresses the hydrogen generated by the water electrolysis device. the fuel cell vehicle includes a compressor, a high-pressure hydrogen tank filled with high-pressure hydrogen compressed by the compressor, a dispenser that fills the fuel cell vehicle with high-pressure hydrogen stored in the high-pressure hydrogen tank and recovers water from the fuel cell vehicle, a composite pipe that integrates a hydrogen filling pipe that fills the fuel cell vehicle with hydrogen and a water recovery pipe that recovers water stored in the fuel cell vehicle, and a suction pump that is connected to the water recovery pipe and sucks out the water recovered from the fuel cell and transfers it to the recovered water tank, wherein the water recovery unit recovers water stored in the fuel cell vehicle via the dispenser, the water recovery pipe, and the suction pump, and stores it in the recovered water tank, and transfers the water stored in the recovered water tank to the pure water tank.

[0026] Hydrogen station of the present disclosure a hydrogen station that fills hydrogen into a fuel cell vehicle that is equipped with a fuel cell that uses hydrogen as fuel and that stores water produced during power generation by the fuel cell, and that includes a hydrogen generation and supply unit that generates hydrogen using water received from outside and water recovered from the fuel cell vehicle and supplies the generated hydrogen to the fuel cell vehicle, the hydrogen generation and supply unit including a pure water tank that stores pure water transported from outside, a water electrolysis device that electrolyzes the pure water stored in the pure water tank using power supplied from outside to generate hydrogen and oxygen, a compressor that compresses the hydrogen generated by the water electrolysis device, a high-pressure hydrogen tank that is filled with high-pressure hydrogen compressed by the compressor, a dispenser that fills the fuel cell vehicle with high-pressure hydrogen stored in the high-pressure hydrogen tank and recovers water from the fuel cell vehicle, a composite pipe that integrates a hydrogen filling pipe that fills the fuel cell vehicle with hydrogen and a water recovery pipe that recovers water stored in the fuel cell vehicle, and a suction pump that is connected to the water recovery pipe and draws out the water recovered from the fuel cell and transfers it to the pure water tank. Effect of the Invention

[0031] The present invention can realize a sustainable hydrogen society in areas or spaces where water is scarce. [Brief description of the drawings]

[0032] [Figure 1] 1 is a system diagram showing a configuration of a hydrogen circulation system according to a first embodiment. [Diagram 2] FIG. 5 is a system diagram showing the configuration of a hydrogen circulation system according to a second embodiment. [Diagram 3] FIG. 11 is a system diagram showing the configuration of a hydrogen circulation system according to a third embodiment. [Figure 4] FIG. 11 is a system diagram showing the configuration of a hydrogen circulation system according to a fourth embodiment. [Diagram 5] FIG. 13 is a system diagram showing the configuration of a hydrogen circulation system according to a fifth embodiment. [Figure 6] FIG. 13 is a system diagram showing the configuration of a hydrogen circulation system according to a sixth embodiment. [Figure 7] FIG. 13 is a system diagram showing the configuration of a hydrogen circulation system according to a seventh embodiment. [Figure 8] FIG. 13 is a system diagram showing the configuration of a hydrogen circulation system according to an eighth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] Hereinafter, hydrogen circulation systems 100, 200, 300, 400, 500, 600, 700, and 800 of first to eighth embodiments will be described with reference to the drawings. First, the hydrogen circulation system 100 of the first embodiment will be described with reference to FIG.

[0034] 1, the hydrogen circulation system 100 is composed of a fuel cell vehicle 10, a hydrogen supply unit 20, and a hydrogen generation unit 30. The hydrogen supply unit 20 and the hydrogen generation unit 30 are installed in a hydrogen station 40. The hydrogen station 40 is a place where various facilities are provided for filling the fuel cell vehicle 10 with hydrogen.

[0035] The fuel cell vehicle 10 is a vehicle that runs by driving a motor 16 with electricity generated by a fuel cell 11 that uses hydrogen as fuel. The fuel cell vehicle 10 is equipped with the fuel cell 11, a hydrogen tank 12, a water tank 14, a battery 17, and the motor 16.

[0036] The fuel cell 11 generates electricity by reacting hydrogen gas, which is the fuel stored in a hydrogen tank 12, with oxygen in the air. The fuel cell 11 produces water when generating electricity. The water produced by the fuel cell 11 when generating electricity is stored in a water tank 14. The electric power generated by the fuel cell 11 charges a battery 17 and is also supplied to a motor 16. The motor 16 is driven by the electric power supplied from the battery 17 or the fuel cell 11 to run the fuel cell vehicle 10.

[0037] The fuel cell vehicle 10 is fitted with a filling port 13 connected to a hydrogen tank 12 for filling hydrogen into the hydrogen tank 12, and a water outlet 15 connected to a water tank 14 for allowing water stored in the water tank 14 to flow out.

[0038] The hydrogen supply unit 20 is composed of a hydrogen receiving facility 21, a compressor 22, a high-pressure hydrogen tank 23, and a dispenser 24.

[0039] The hydrogen receiving facility 21 is a facility for receiving and storing hydrogen transported from a hydrogen production facility (not shown) installed at a location separate from the hydrogen station 40. The hydrogen receiving facility 21 may be, for example, a facility for storing cartridges of hydrogen cylinders.

[0040] The compressor 22 increases the pressure of the hydrogen gas stored in the hydrogen receiving equipment 21 to a pressure at which the hydrogen gas can be filled into the hydrogen tank 12 of the fuel cell vehicle 10. The high-pressure hydrogen discharged from the compressor 22 is filled into the high-pressure hydrogen tank 23.

[0041] The dispenser 24 includes a dispenser body 24a connected to the high-pressure hydrogen tank 23, a hydrogen filling pipe 25 connected to the dispenser body 24a, and a filling nozzle 26 attached to the end of the hydrogen filling pipe 25. When filling the hydrogen tank 12 of the fuel cell vehicle 10 with hydrogen, the filling nozzle 26 is inserted and fixed into the filling port 13 of the fuel cell vehicle 10, and when the lever of the filling nozzle 26 is operated, high-pressure hydrogen from the dispenser body 24a is filled into the hydrogen tank 12 of the fuel cell vehicle 10 through the filling nozzle 26 and the filling port 13.

[0042] The hydrogen generation unit 30 is composed of a recovered water tank 31, a water electrolysis device 32, a hydrogen compressor 33, a high-pressure hydrogen tank , an oxygen compressor 35, and an oxygen tank .

[0043] The recovered water tank 31 is connected to a water recovery pipe 37 which is connected to the water outlet 15 of the fuel cell vehicle 10, and recovers and stores the water stored in the water tank 14 of the fuel cell vehicle 10. The recovered water tank 31 is buried underground in the hydrogen station 40 and may recover water from the water tank 14 of the fuel cell vehicle 10 by gravity, or may be placed above ground and configured to recover water sucked out from the water tank 14 of the fuel cell vehicle 10 by a suction pump (not shown) provided in the middle of the water recovery pipe 37. The capacity of the recovered water tank 31 can be freely determined, but may be, for example, a capacity sufficient to recover water from ten to several tens of fuel cell vehicles 10.

[0044] The water electrolysis device 32 is a device that is supplied with electricity generated by renewable energy such as wind power, and electrolyzes the water stored in the recovered water tank 31 to produce hydrogen and oxygen. The hydrogen produced in the water electrolysis device 32 is compressed by a hydrogen compressor 33 and filled into a high-pressure hydrogen tank 34. The oxygen produced in the water electrolysis device 32 is compressed by an oxygen compressor 35 and filled into an oxygen tank 36.

[0045] The high-pressure hydrogen tank 34 is connected to the dispenser body 24a, and supplies high-pressure hydrogen to the dispenser body 24a as hydrogen to be supplied to the fuel cell vehicle. When hydrogen is filled from the dispenser 24 into the hydrogen tank 12 of the fuel cell vehicle 10, the high-pressure hydrogen tank 34 supplies high-pressure hydrogen to the dispenser body 24a together with the high-pressure hydrogen tank 23 of the hydrogen supply unit 20. The supplied high-pressure hydrogen passes through the filling nozzle 26 and filling port 13 to fill the hydrogen tank 12 of the fuel cell vehicle 10.

[0046] The oxygen stored in the oxygen tank 36 is then loaded into oxygen cylinders and transported for use in industry, medical care, or other fields.

[0047] In this way, the hydrogen circulation system 100 stores in the water tank 14 the water generated when the fuel cell 11 of the fuel cell vehicle 10 uses hydrogen as fuel to generate electricity, and recovers the water stored in the water tank 14 in the recovered water tank 31 of the hydrogen generation unit 30 of the hydrogen station 40. The recovered water is then electrolyzed in the water electrolysis device 32 to generate hydrogen, and the generated hydrogen is compressed and filled into the hydrogen tank 12 of the fuel cell vehicle 10. This makes it possible to circulate hydrogen between the fuel cell vehicle 10, the hydrogen generation unit 30, and the hydrogen supply unit 20. Furthermore, because the water electrolysis device 32 is driven by electricity generated using renewable energy, it is possible to realize a sustainable hydrogen society in areas or spaces where water is in short supply.

[0048] Next, a hydrogen circulation system 200 according to a second embodiment will be described with reference to Fig. 2. The same components as those in the hydrogen circulation system 100 according to the first embodiment previously described with reference to Fig. 1 will be denoted by the same reference numerals and will not be described.

[0049] As shown in Fig. 2, the hydrogen circulation system 200 of the second embodiment has the high-pressure hydrogen tank 34 of the hydrogen generation unit 30 connected to the high-pressure hydrogen tank 23 of the hydrogen supply unit 20. The other configuration is the same as that of the hydrogen circulation system 100. The hydrogen circulation system 200 achieves the same effects as the hydrogen circulation system 100. The high-pressure hydrogen tank 34 of the hydrogen generation unit 30 may be connected to the hydrogen receiving equipment 21 of the hydrogen supply unit 20. In this case, the hydrogen compressor 33 of the hydrogen generation unit 30 can be configured as a simple one with a not very high discharge pressure.

[0050] Next, a hydrogen circulation system 300 according to a third embodiment will be described with reference to Fig. 3. The same components as those in the hydrogen circulation system 100 according to the first embodiment previously described with reference to Fig. 1 will be denoted by the same reference numerals, and the description thereof will be omitted.

[0051] The hydrogen circulation system 300 shown in Fig. 3 has the hydrogen generation unit 30 installed at a different location adjacent to the hydrogen station 45. The hydrogen circulation system 300 is the same as the hydrogen circulation system 100 described with reference to Fig. 1, except that the hydrogen generation unit 30 is not installed inside the hydrogen station 45. The hydrogen circulation system 300 is a system suitable for cases where, for example, there is no space to install the hydrogen generation unit 30 inside the hydrogen station 45.

[0052] Next, a hydrogen circulation system 400 according to a fourth embodiment will be described with reference to Fig. 4. The hydrogen circulation system 400 is composed of a fuel cell vehicle 10, a hydrogen generation and supply unit 50, and a water recovery unit 60. The hydrogen generation and supply unit 50 and the water recovery unit 60 are installed in a hydrogen station 70. Note that the same components as those in the hydrogen circulation system 100 previously described with reference to Fig. 1 are designated by the same reference numerals and will not be described again.

[0053] The hydrogen generation and supply unit 50 is composed of a pure water tank 51 , a water electrolysis device 52 , a hydrogen compressor 53 , a high-pressure hydrogen tank 23 , a dispenser 24 , an oxygen compressor 54 , and an oxygen tank 55 .

[0054] The pure water tank 51 is a tank for storing pure water delivered from the outside.

[0055] The water electrolysis device 52 is supplied with pure water stored in a pure water tank 51, and electrolyzes the supplied pure water using electricity generated by renewable energy such as wind power to produce hydrogen and oxygen.

[0056] The hydrogen compressor 53 is a device that compresses the hydrogen produced in the water electrolysis device 52 and fills it into the high-pressure hydrogen tank 23. The high-pressure hydrogen tank 23 is connected to the dispenser 24. In addition, the oxygen compressor 54 is a device that compresses the oxygen produced in the water electrolysis device 52 and fills it into the oxygen tank 55.

[0057] The water recovery unit 60 includes a recovered water tank 31 similar to that described above with reference to Fig. 1. A water recovery pipe 37, which is connected to the water outlet 15 of the fuel cell vehicle 10, is connected to the recovered water tank 31, and recovers and stores the water stored in the water tank 14 of the fuel cell vehicle 10. The recovered water tank 31 is connected to a pure water tank 51 of the hydrogen generation and supply unit 50, and the water stored in the recovered water tank 31 is transferred to the pure water tank 51 by a transfer pump (not shown) and used for generating hydrogen in the hydrogen generation and supply unit 50.

[0058] In the hydrogen circulation system 400 configured in this manner, water generated by the fuel cell 11 of the fuel cell vehicle 10 using hydrogen as fuel during power generation is stored in the water tank 14, and the water stored in the water tank 14 is recovered in the recovered water tank 31 of the water recovery unit 60 of the hydrogen station 70. The recovered water is then transferred to the pure water tank 51 of the hydrogen generation and supply unit 50, where it is electrolyzed in the water electrolysis device 52 to generate hydrogen, and the generated hydrogen is compressed and filled into the hydrogen tank 12 of the fuel cell vehicle 10. In other words, the water electrolysis device 52 generates hydrogen using water received from the outside and water recovered from the fuel cell vehicle 10. This allows hydrogen to be circulated between the fuel cell vehicle 10, the water recovery unit 60, and the hydrogen generation and supply unit 50. The water electrolysis device 52 is driven by electricity generated using renewable energy, making it possible to realize a sustainable hydrogen society in areas or spaces where water is in short supply.

[0059] Next, a hydrogen circulation system 500 according to a fifth embodiment will be described with reference to Fig. 5. The same components as those in the hydrogen circulation system 400 previously described with reference to Fig. 4 are designated by the same reference numerals and will not be described again.

[0060] 5 shows a hydrogen circulation system 500 in which a water recovery unit 60 is disposed outside a hydrogen station 75. The water stored in the recovered water tank 31 may be transferred to the pure water tank 51 of the hydrogen generation and supply unit 50 by a transfer pump or the like, or may be transported by a truck or the like.

[0061] The hydrogen circulation system 500 is a suitable system when, for example, there is no space to install the water recovery unit 60 in the hydrogen station 75. The hydrogen circulation system 500 has the same effects as the hydrogen circulation system 400.

[0062] Next, a hydrogen circulation system 600 according to a sixth embodiment will be described with reference to Fig. 6. The same components as those in the hydrogen circulation system 100 previously described with reference to Fig. 1 are designated by the same reference numerals, and description thereof will be omitted. The hydrogen circulation system 600 is configured such that the dispenser 124 of the hydrogen supply unit 20 fills the fuel cell vehicle 10 with hydrogen and recovers water from the fuel cell vehicle 10, and the hydrogen generation unit 30 recovers water stored in the fuel cell vehicle 10 via the dispenser 124.

[0063] 6, a composite pipe 27 integrating a hydrogen filling pipe 25 and a water recovery pipe 28 is attached to a dispenser body 124a of the hydrogen supply unit 20, and the dispenser body 124a and the recovered water tank 31 of the hydrogen generation unit 30 are connected by a water transfer pipe 38. In addition, a suction pump 29 is provided inside the dispenser body 124a, which is connected to the water recovery pipe 28 of the composite pipe 27 and sucks out water stored in the water tank 14 of the fuel cell vehicle 10.

[0064] In the hydrogen circulation system 600, when filling the fuel cell vehicle 10 with hydrogen, the filling nozzle 26 at the end of the hydrogen filling pipe 25 is connected to the filling port 13 of the fuel cell vehicle 10, and the end of the water recovery pipe 28 is connected to the water outlet 15 of the fuel cell vehicle 10. When filling with hydrogen, the suction pump 29 is driven to suck out water stored in the water tank 14 of the fuel cell vehicle 10 through the water recovery pipe 28, and the sucked water is transferred from the suction pump 29 through the water transfer pipe 38 to the recovered water tank 31 of the hydrogen generation unit 30.

[0065] The water transferred to the recovered water tank 31 of the hydrogen generation unit 30 is electrolyzed in the water electrolysis device 32 to produce hydrogen, as in the hydrogen circulation system 100. The produced hydrogen is supplied to the dispenser body 124a through the hydrogen compressor 33 and the high-pressure hydrogen tank 34, and then filled into the hydrogen tank 12 of the fuel cell vehicle 10 through the hydrogen filling pipe 25 in the composite pipe 27.

[0066] In this way, the hydrogen circulation system 600 can recover water when supplying hydrogen through the composite pipe 27 that integrates the hydrogen filling pipe 25 and the water recovery pipe 28, so that water stored in the fuel cell vehicle 10 can be recovered in a simple manner.

[0067] Next, a hydrogen circulation system 700 according to a seventh embodiment will be described with reference to Fig. 7. The same components as those in the hydrogen circulation systems 400 and 600 previously described with reference to Figs. 4 and 6 are designated by the same reference numerals and will not be described again.

[0068] A hydrogen circulation system 700 shown in Fig. 7 has the configuration of the dispenser 24 and the hydrogen filling pipe 25 of the hydrogen circulation system 400 described with reference to Fig. 4 replaced with the configuration of the dispenser 124, the composite pipe 27, the suction pump 29, and the water transfer pipe 38 of the hydrogen circulation system 600 described with reference to Fig. 6. The other configurations are the same as those of the hydrogen circulation system 400 described with reference to Fig. 4.

[0069] The hydrogen circulation system 700 provides the same functions and effects as the hydrogen circulation system 600 .

[0070] Next, a hydrogen circulation system 800 according to an eighth embodiment will be described with reference to Fig. 8. The same components as those in the hydrogen circulation systems 400 and 700 previously described with reference to Figs. 4 and 7 will be given the same reference numerals and will not be described again.

[0071] The hydrogen circulation system 800 shown in FIG. 8 is obtained by eliminating the recovered water tank 31 of the hydrogen circulation system 700 shown in FIG. 7, and by connecting the suction pump 29 of the dispenser body 124a and the pure water tank 51 of the hydrogen generation supply unit 50 with a water transfer pipe 56.

[0072] The hydrogen circulation system 800 has a simple configuration in which the hydrogen generation and supply unit 50 recovers water stored in the fuel cell vehicle 10 and generates hydrogen using the recovered water, thereby enabling the hydrogen in the fuel cell vehicle 10 to be circulated.

[0073] In the above explanation, the suction pump 29 provided in the dispenser body 124a is used to suck out the water stored in the water tank 14 of the fuel cell vehicle 10. However, this is not limited to the above. For example, the fuel cell vehicle 10 may be equipped with a water pump, and the water stored in the water tank 14 may be transported to the recovered water tank 31 by the water pump mounted on the fuel cell vehicle 10.

[0074] As described above, the hydrogen circulation systems 100, 200, 300, 400, 500, 600, 700, 800 can circulate hydrogen between the fuel cell vehicle 10, the hydrogen generation unit 30, and the hydrogen supply unit 20, or between the fuel cell vehicle 10, the water recovery unit 60, and the hydrogen generation and supply unit 50, or between the fuel cell vehicle 10 and the hydrogen generation and supply unit 50. Furthermore, because the water electrolysis devices 32, 52 are driven by electricity generated from renewable energy, it is possible to realize a sustainable hydrogen society in areas or spaces where water is in short supply. [Explanation of symbols]

[0075] 10 fuel cell vehicle, 11 fuel cell, 12 hydrogen tank, 13 filling port, 14 water tank, 15 water outlet, 16 motor, 17 battery, 20 hydrogen supply unit, 21 hydrogen receiving equipment, 22 compressor, 23, 34 high pressure hydrogen tank, 24, 124 dispenser, 24a, 124a dispenser body, 25 hydrogen filling pipe, 26 filling nozzle, 27 composite pipe, 28, 37 water recovery pipe, 29 suction pump, 30 hydrogen generation unit, 31 recovered water tank, 32, 52 water electrolysis device, 33, 53 hydrogen compressor, 35, 54 oxygen compressor, 36, 55 oxygen tank, 38, 56 water transfer pipe, 40, 45, 70, 75 hydrogen station, 50 hydrogen generation supply unit, 51 pure water tank, 60 Water recovery units, 100, 200, 300, 400, 500, 600, 700, 800 Hydrogen circulation systems.

Claims

1. a fuel cell vehicle equipped with a fuel cell that uses hydrogen as fuel and stores water generated when the fuel cell generates electricity; a hydrogen supply unit for supplying hydrogen to the fuel cell vehicle; a hydrogen generation unit that recovers water stored in the fuel cell vehicle and stores it in a recovered water tank, generates hydrogen using the water stored in the recovered water tank, and supplies the generated hydrogen to the hydrogen supply unit as hydrogen to be supplied to the fuel cell vehicle, a hydrogen station in which the hydrogen supply unit is installed and which fills the fuel cell vehicle with hydrogen; The hydrogen generation unit is installed in the hydrogen station, The hydrogen supply unit comprises: a dispenser for filling the fuel cell vehicle with hydrogen and recovering water from the fuel cell vehicle; a composite pipe that integrates a hydrogen filling pipe for filling the fuel cell vehicle with hydrogen and a water recovery pipe for recovering water stored in the fuel cell vehicle; a suction pump connected to the water recovery pipe for sucking out the water recovered from the fuel cell and transferring it to the recovered water tank, the hydrogen generation unit recovers water stored in the fuel cell vehicle via the dispenser, the water recovery pipe, and the suction pump, and stores the water in the recovered water tank; A hydrogen circulation system characterized by the above.

2. a fuel cell vehicle equipped with a fuel cell that uses hydrogen as fuel and stores water generated when the fuel cell generates electricity; a hydrogen generation and supply unit that generates hydrogen using water received from outside and water recovered from the fuel cell vehicle and supplies the generated hydrogen to the fuel cell vehicle; a water recovery unit that recovers water stored in the fuel cell vehicle and stores it in a recovered water tank, and supplies the water stored in the recovered water tank to the hydrogen generation and supply unit, a hydrogen station in which the hydrogen generation and supply unit is installed and which fills the fuel cell vehicle with hydrogen; The water recovery unit is installed in the hydrogen station, The hydrogen generation and supply unit comprises: a pure water tank for storing pure water delivered from the outside; a water electrolysis device that electrolyzes the pure water stored in the pure water tank using power supplied from an external source to generate hydrogen and oxygen; A compressor that compresses the hydrogen generated by the water electrolysis device; a high-pressure hydrogen tank filled with high-pressure hydrogen compressed by the compressor; a dispenser that fills the fuel cell vehicle with high-pressure hydrogen stored in the high-pressure hydrogen tank and collects water from the fuel cell vehicle; a composite pipe that integrates a hydrogen filling pipe for filling the fuel cell vehicle with hydrogen and a water recovery pipe for recovering water stored in the fuel cell vehicle; a suction pump connected to the water recovery pipe for sucking out the water recovered from the fuel cell and transferring it to the recovered water tank; Including, the water recovery unit recovers water stored in the fuel cell vehicle via the dispenser, the water recovery pipe, and the suction pump, and stores the water in the recovered water tank, and transfers the water stored in the recovered water tank to the pure water tank; A hydrogen circulation system characterized by the above.

3. a fuel cell vehicle equipped with a fuel cell that uses hydrogen as fuel and stores water generated when the fuel cell generates electricity; A hydrogen circulation system including: a hydrogen generation and supply unit that generates hydrogen using water received from an outside source and water recovered from the fuel cell vehicle, and supplies the generated hydrogen to the fuel cell vehicle, The hydrogen generation and supply unit comprises: a pure water tank for storing pure water delivered from the outside; a water electrolysis device that electrolyzes the pure water stored in the pure water tank using power supplied from an external source to generate hydrogen and oxygen; A compressor that compresses the hydrogen generated by the water electrolysis device; a high-pressure hydrogen tank filled with high-pressure hydrogen compressed by the compressor; a dispenser that fills the fuel cell vehicle with high-pressure hydrogen stored in the high-pressure hydrogen tank and collects water from the fuel cell vehicle; a composite pipe that integrates a hydrogen filling pipe for filling the fuel cell vehicle with hydrogen and a water recovery pipe for recovering water stored in the fuel cell vehicle; a suction pump connected to the water recovery pipe for sucking out the water recovered from the fuel cell and transferring it to the pure water tank; A hydrogen circulation system characterized by the above.

4. A hydrogen station that fills hydrogen into a fuel cell vehicle equipped with a fuel cell that uses hydrogen as fuel and stores water produced during power generation by the fuel cell, comprising: a hydrogen supply unit for supplying hydrogen to the fuel cell vehicle; a hydrogen generation unit that recovers water from the fuel cell vehicle and stores it in a recovered water tank, generates hydrogen using the water stored in the recovered water tank, and supplies the generated hydrogen to the hydrogen supply unit, The hydrogen supply unit comprises: a dispenser for filling the fuel cell vehicle with hydrogen and recovering water from the fuel cell vehicle; a composite pipe that integrates a hydrogen filling pipe for filling the fuel cell vehicle with hydrogen and a water recovery pipe for recovering water stored in the fuel cell vehicle; a suction pump connected to the water recovery pipe for sucking out the water recovered from the fuel cell and transferring it to the recovered water tank, the hydrogen generation unit recovers water stored in the fuel cell vehicle via the dispenser, the water recovery pipe, and the suction pump, and stores the water in the recovered water tank; A hydrogen station that features the following:

5. A hydrogen station that fills hydrogen into a fuel cell vehicle equipped with a fuel cell that uses hydrogen as fuel and stores water produced during power generation by the fuel cell, comprising: a hydrogen generation and supply unit that generates hydrogen using water received from outside and water recovered from the fuel cell vehicle and supplies the generated hydrogen to the fuel cell vehicle; a water recovery unit that recovers water from the fuel cell vehicle and stores it in a recovered water tank, and supplies the water stored in the recovered water tank to the hydrogen generation and supply unit, The hydrogen generation and supply unit comprises: a pure water tank for storing pure water delivered from the outside; a water electrolysis device that electrolyzes the pure water stored in the pure water tank using power supplied from an external source to generate hydrogen and oxygen; A compressor that compresses the hydrogen generated by the water electrolysis device; a high-pressure hydrogen tank filled with high-pressure hydrogen compressed by the compressor; a dispenser that fills the fuel cell vehicle with high-pressure hydrogen stored in the high-pressure hydrogen tank and collects water from the fuel cell vehicle; a composite pipe that integrates a hydrogen filling pipe for filling the fuel cell vehicle with hydrogen and a water recovery pipe for recovering water stored in the fuel cell vehicle; a suction pump connected to the water recovery pipe for sucking out the water recovered from the fuel cell and transferring it to the recovered water tank; the water recovery unit recovers water stored in the fuel cell vehicle via the dispenser, the water recovery pipe, and the suction pump, and stores the water in the recovered water tank, and transfers the water stored in the recovered water tank to the pure water tank; A hydrogen station that features the following:

6. A hydrogen station that fills hydrogen into a fuel cell vehicle equipped with a fuel cell that uses hydrogen as fuel and stores water produced during power generation by the fuel cell, comprising: a hydrogen generation and supply unit that generates hydrogen using water received from outside and water recovered from the fuel cell vehicle and supplies the generated hydrogen to the fuel cell vehicle; The hydrogen generation and supply unit comprises: a pure water tank for storing pure water delivered from the outside; a water electrolysis device that electrolyzes the pure water stored in the pure water tank using power supplied from an external source to generate hydrogen and oxygen; A compressor that compresses the hydrogen generated by the water electrolysis device; a high-pressure hydrogen tank filled with high-pressure hydrogen compressed by the compressor; a dispenser that fills the fuel cell vehicle with high-pressure hydrogen stored in the high-pressure hydrogen tank and collects water from the fuel cell vehicle; a composite pipe that integrates a hydrogen filling pipe for filling the fuel cell vehicle with hydrogen and a water recovery pipe for recovering water stored in the fuel cell vehicle; a suction pump connected to the water recovery pipe for sucking out the water recovered from the fuel cell and transferring it to the pure water tank; A hydrogen station that features the following:

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