JP6114676B2 - Hydrogen station - Google Patents

Description

  The present invention relates to a hydrogen station for filling a hydrogen fuel tank such as a fuel cell vehicle (FCV) with hydrogen.

There are two types of hydrogen stations: an off-site type in which hydrogen produced elsewhere is transported, and an on-site type in which hydrogen is produced in situ. The off-site type hydrogen station does not need to be equipped with a hydrogen production facility and requires less capital investment than the on-site type hydrogen station. However, in order to efficiently transport the hydrogen from the hydrogen production site to the hydrogen station, it is necessary to compress the hydrogen to a high pressure or to cool it to a cryogenic temperature and to liquefy it, resulting in high transportation costs.
On the other hand, the on-site type hydrogen station requires a construction cost for providing a hydrogen production facility, but has an advantage that the transportation cost of raw materials for hydrogen production is lower than the transportation cost of hydrogen. As raw materials for producing hydrogen, city gas, liquefied petroleum gas (LPG), naphtha, kerosene, methanol, organic hydride (a liquid that easily generates hydrogen gas by dehydrogenation reaction, cyclohexane, methylcyclohexane, decalin and its derivatives, 2-propanol etc. are mentioned suitably). These raw materials are gas or liquid, and can be easily transported by pipelines, cylinders, lorries and the like. For this reason, it is considered that the number of installed off-site hydrogen stations and on-site hydrogen stations will increase in the future in order to promote the spread of fuel cell vehicles or with the spread of fuel cell vehicles.

  As a conventional hydrogen station, for example, one described in Patent Document 1 is disclosed. The hydrogen station includes a pressure accumulator unit having a plurality of pressure accumulator banks that store hydrogen of different pressure values, and sequentially switches from a low pressure value accumulator bank to a high pressure value accumulator bank. The hydrogen fuel tank is configured to be filled with hydrogen. Then, the maximum pressure value of the accumulator bank is set to a pressure value higher than the maximum use pressure (full tank) of the hydrogen fuel tank of the fuel cell vehicle so that the hydrogen fuel tank of the fuel cell vehicle can be filled with hydrogen to the full tank. Yes.

JP 2008-64160 A

However, in the conventional hydrogen station described in Patent Document 1, the pressure value in each accumulator bank decreases each time hydrogen is filled into the fuel cell vehicle. For this reason, for example, when there is no accumulator bank that maintains a residual pressure value higher than the residual pressure value of the hydrogen fuel tank of the fuel cell automobile when the fuel cell automobile comes to the store, each accumulator bank Has a problem that hydrogen cannot be filled into the hydrogen fuel tank of a fuel cell vehicle despite the fact that hydrogen remains.
On the other hand, in an on-site type hydrogen station, since it takes more than several hours to start producing hydrogen after starting up the hydrogen production facility, when many fuel cell vehicles come to the store in the short time, the above-mentioned Challenges arise. In addition, when starting and stopping hydrogen production facilities, raw materials, electric power, utilities, etc. are consumed in addition to the production of product hydrogen, so if you start and stop frequently depending on the frequency of fuel cell vehicle visits There is a problem that it is economically disadvantageous.

  Accordingly, the present invention provides a hydrogen station that can always secure a pressure accumulator having an internal pressure (residual pressure) that can be charged into a hydrogen fuel tank by interchanging residual hydrogen among a plurality of pressure accumulators. With the goal.

For this reason, the present invention includes a compressor for boosting hydrogen and a pressure accumulating unit having a plurality of pressure accumulators capable of storing the hydrogen boosted by the compressor, and the hydrogen stored in the pressure accumulating unit is converted into hydrogen fuel. a hydrogen station for filling the tank, the hydrogen residual pressure in the lowest accumulator of the plurality of pressure accumulator, and pressurized by the compressor is configured to transfer to another accumulator It is characterized by.

  According to the hydrogen station of the present invention, hydrogen in a part of the pressure accumulators of the plurality of pressure accumulators can be boosted by a compressor and transferred to other pressure accumulators. It becomes possible to prepare a high-pressure accumulator by increasing the pressure to another accumulator and transferring it. As a result, even if the residual pressure of all the pressure accumulators is less than the maximum operating pressure of the hydrogen fuel tank, hydrogen can be exchanged between the accumulators, so that the pressure value higher than the maximum operating pressure (full tank) of the hydrogen fuel tank can be obtained. A pressure accumulator can be prepared. For this reason, for example, even if a fuel cell vehicle arrives at the hydrogen station, the problem that the hydrogen fuel tank cannot be filled due to insufficient residual pressure even though hydrogen remains in the accumulator can be solved. Hydrogen can be used effectively.

It is a figure which shows the structure of the off-site type hydrogen station by 1st Embodiment of this invention. It is a flowchart which shows an example of the hydrogen transfer process between the pressure accumulators of the off-site type hydrogen station by the said 1st Embodiment. It is a flowchart which shows an example of the transfer process of the hydrogen from the container for hydrogen transport to the off-site type hydrogen station by the said 1st Embodiment. It is a flowchart which shows another example of the transfer process of the hydrogen from the container for hydrogen transport to the off-site type hydrogen station by the said 1st Embodiment. It is a figure which shows the structure of the off-site type | mold hydrogen station by 2nd Embodiment of this invention. It is a figure which shows the structure of the off-site type hydrogen station by the modification of 1st Embodiment. It is a figure which shows the structure of the off-site type | mold hydrogen station by 3rd Embodiment of this invention. It is a flowchart which shows an example of the hydrogen transfer process between the pressure accumulators of the off-site type hydrogen station by the said 3rd Embodiment. It is a figure which shows the structure of the off-site type | mold hydrogen station using liquid hydrogen by 4th Embodiment of this invention. It is a figure which shows the structure of the off-site type | mold hydrogen station using the liquid hydrogen by the modification of 4th Embodiment. It is a figure which shows the structure of the on-site type hydrogen station by 5th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows the configuration of an off-site hydrogen station according to the first embodiment of the present invention. As shown in FIG. 1, an off-site type hydrogen station (hereinafter simply referred to as “hydrogen station”) 1 of the present embodiment includes a compressor 2 that boosts hydrogen, and an accumulator that can store hydrogen boosted by the compressor 2. A unit 3, a dispenser 4 that fills hydrogen stored in the pressure accumulating unit 3 into, for example, a hydrogen fuel tank mounted on a fuel cell vehicle (FCV), and the control device 8 are provided.

The pressure accumulating unit 3 has an inlet part 3 a through which hydrogen flows into the pressure accumulating unit 3 and an outlet part 3 b through which hydrogen flows out from the pressure accumulating unit 3. One end of the connecting pipe 7 is connected to the inlet 3 a of the pressure accumulating unit 3. The other end of the connecting pipe 7 is configured to be detachable from the hydrogen transporting container 50, and the other end of the connecting pipe 7 is attached to the hydrogen transporting container 50, so The container 50 and the pressure accumulation unit 3 are connected. The connecting pipe 7 includes a straight pipe portion 71 in which the compressor 2 is interposed, and a branch pipe portion 72 that branches in the middle of the straight pipe portion 71 and bypasses the compressor 2. It has a function as a hydrogen transfer pipe for transferring the hydrogen inside to the hydrogen station 1. Here, a part of the straight pipe portion 71 in the connecting pipe 7 and the branch pipe portion 72 that bypasses the compressor 2 store the hydrogen in the hydrogen transport container 50 without the compressor 2, as will be described later. This corresponds to the “transfer line” of the present invention, which can be transferred to 311 with a differential pressure. The branch pipe portion 72 is provided with a check valve 60 that prevents hydrogen from flowing from the outlet side to the inlet side of the compressor 2.
One end of the connection pipe 9 is connected to the outlet 3 b of the pressure accumulating unit 3, and the other end of the connection pipe 9 is connected to the dispenser 4.

  The accumulator unit 3 includes a plurality (four in this case) of accumulator banks 31, and each accumulator bank 31 has a plurality (three in this case) of accumulators, for example, having different pressures (filling pressures) of hydrogen to be stored. The device 311 is configured. For example, each pressure accumulator bank 31 was set to store 40 MPa of hydrogen, a pressure accumulator set to store 70 MPa of hydrogen, and 82 MPa of hydrogen. It is composed of a pressure accumulator. In this embodiment, the set pressures of the pressure accumulators 311 in the pressure accumulator bank 31 are made different, but the set pressures of some or all of the pressure accumulators 311 may be set to be the same.

  A dedicated valve mechanism (for example, an electromagnetic valve) 313 and a pressure detection unit 101 are provided at an inlet / outlet portion serving as a hydrogen filling port and a discharge port of each pressure accumulator 311. Each pressure accumulator 311 is connected to the inlet portion 3a of the pressure accumulating unit 3 via a dedicated valve mechanism 313 provided at the inlet / outlet portion thereof, and a check valve 312 and a valve mechanism 314 provided for each of the pressure accumulator banks 31. ing. Each pressure accumulator 311 is connected to the outlet 3b of the pressure accumulating unit 3 via a dedicated valve mechanism 313 provided at the inlet / outlet portion, and a valve mechanism 315 and check valve 316 provided for each pressure accumulator bank 31. It is connected. The check valve 312 prevents hydrogen from flowing from the respective accumulator bank 31 side to the inlet portion 3a side, and the check valve 316 allows hydrogen to flow from the outlet portion 3b side to each accumulator bank 31 side. It is to prevent.

  As a result, in the pressure accumulating unit 3, when the valve mechanism 314 and the valve mechanism 313 are selectively opened in a state where the valve mechanism 315 is closed, the hydrogen boosted by the compressor 2 is stored in the predetermined pressure accumulator bank 31. When the valve mechanism 314 or the valve mechanism 313 that has been filled in the vessel 311 and opened is closed, the filling of hydrogen into the predetermined pressure accumulator 311 is stopped. Here, the valve mechanism 313 and the valve mechanism 314 constitute a first valve mechanism of the present invention. When the valve mechanism 315 and the valve mechanism 313 are selectively opened while the valve mechanism 314 is closed, hydrogen is released from the predetermined pressure accumulator 311 in the predetermined pressure accumulator bank 31, and the valve mechanism 315 opened or opened When the valve mechanism 313 is closed, the release of hydrogen from the predetermined pressure accumulator 311 is stopped. Here, the valve mechanism 313 and the valve mechanism 315 constitute a second valve mechanism of the present invention. Each of the valve mechanisms 313 to 315 includes, for example, an electromagnetic on-off valve and a flow rate adjustment valve.

  The dispenser 4 is a device that can fill the hydrogen fuel tank with hydrogen. Specifically, the dispenser 4 fills the hydrogen fuel tank with hydrogen released from the pressure accumulator 311. The dispenser 4 receives information (residual pressure, maximum working pressure, etc.) on the hydrogen fuel tank from the fuel cell vehicle (FCV) or the like. In the present embodiment, the hydrogen fuel tank is configured to be able to be filled with, for example, 70 MPa hydrogen.

  Further, the hydrogen station 1 is connected to a connecting pipe 5 that branches from a connecting pipe 9 that connects the outlet 3b of the pressure accumulating unit 3 and the dispenser 4 and connects the outlet 3b of the accumulating unit 3 to the inlet side of the compressor 2. And a valve mechanism (for example, an electromagnetic valve) 6 that opens and closes the pipe 5. The connecting pipe 5 has a function as a hydrogen transfer pipe for returning hydrogen released from each pressure accumulator 311 to the inlet side of the compressor 2 and corresponds to a “return line” of the present invention. In the present embodiment, the hydrogen transport container 50 is formed so as to be filled with, for example, 45 MPa hydrogen. Here, the hydrogen transport container 50 refers to a container that is mainly filled with hydrogen in another place and is transported by a transport vehicle such as a tractor or a truck, such as a hydrogen trailer, a hydrogen curdle, or a hydrogen tank. included.

  The control device 8 includes various information including internal pressure (residual pressure) of each accumulator 311 detected by the pressure detector 101 and information (residual pressure, maximum operating pressure, etc.) regarding the hydrogen fuel tank input to the dispenser 4. Is entered. And the control apparatus 8 controls the compressor 2 and each valve mechanism 6,313-315 grade | etc., Suitably based on the input various information, the operation command by an operator, etc. FIG. In the present embodiment, it is assumed that the valve mechanisms 6, 313, 315 are closed and the valve mechanism 314 is open in the default state.

Here, the process which the control apparatus 8 implements is demonstrated easily.
(1) Filling process into hydrogen fuel tank Before the hydrogen filling of the hydrogen fuel tank to be filled, the control device 8 includes information on the hydrogen fuel tank (residual pressure, maximum operating pressure, etc.) and each accumulated pressure. The internal pressure (residual pressure) of the vessel 311 is input. Then, the control device 8 selects an appropriate accumulator bank 31 among the plurality of accumulator banks 31 of the accumulator unit 3 based on the input information on the hydrogen fuel tank and the internal pressure (residual pressure) of each accumulator 311. select. Specifically, based on the residual pressure and the maximum operating pressure of the hydrogen fuel tank, and the residual pressure state of the pressure accumulator 311 constituting each pressure accumulator bank 31, the control device 8 sets the hydrogen fuel tank to be filled at that time. On the other hand, the accumulator bank 31 that can be filled with hydrogen most efficiently is selected. However, the present invention is not limited to this, and the control device 8 may be configured to select the accumulator bank 31 based on a selection command from the operator.

  Next, the control device 8 monitors the internal pressure (residual pressure) of each accumulator 311 of the selected accumulator bank 31 and the internal pressure (residual pressure) of the hydrogen fuel tank, while higher than the internal pressure of the hydrogen fuel tank. In addition, the valve mechanism 313 and the valve mechanism 315 are controlled so as to release hydrogen from the pressure accumulator 311 having a residual pressure closest to the internal pressure of the hydrogen fuel tank (that is, the corresponding valve mechanism 313 and valve mechanism 315 are opened). . Therefore, when the residual pressure of the pressure accumulator 311 that has released hydrogen becomes close to the internal pressure of the hydrogen fuel tank that has been increased by filling during the filling of hydrogen into the hydrogen fuel tank, the control device 8 Then, the valve mechanism 313 is controlled so as to release hydrogen from another pressure accumulator 311 having a residual pressure closest to the internal pressure of the hydrogen fuel tank whose residual pressure is higher than that of the pressure accumulator 311. That is, the pressure accumulator 311 that releases hydrogen is switched. By filling the hydrogen fuel tank with hydrogen in this way, it is possible to perform efficient hydrogen filling while suppressing loss of hydrogen pressure energy.

  Thereafter, when the internal pressure of the hydrogen fuel tank reaches a predetermined pressure set according to the maximum operating pressure, the control device 8 causes the valve mechanism 313 and the valve mechanism 315 to stop releasing hydrogen from the pressure accumulator 311. Control (that is, close the corresponding valve mechanism 313 and valve mechanism 315) ends the filling of hydrogen into the hydrogen fuel tank.

(2) Hydrogen transfer processing between the pressure accumulators 311 When hydrogen is filled in a plurality of hydrogen fuel tanks, the residual pressure of each pressure accumulator 311 becomes low, and any pressure accumulator bank 31 is selected. There is a possibility that the hydrogen fuel tank to be filled cannot be filled with sufficient hydrogen. Therefore, in order to eliminate such fears as much as possible, the hydrogen station 1 according to the present embodiment enables hydrogen transfer between the pressure accumulators 311. The transfer of hydrogen between the pressure accumulators 311 is performed by appropriately controlling the compressor 2 and the valve mechanisms 6, 313 to 315 by the control device 8.

  For example, the control device 8 transfers hydrogen between the pressure accumulators 311 so that the residual pressure of at least one pressure accumulator 311 maintains a state equal to or higher than a predetermined value (for example, 82 MPa which is the maximum set pressure). In this case, for example, when the residual pressures of all the pressure accumulators 311 are less than the predetermined value, the control device 8 selects one of the pressure accumulators 311 on the side having a higher residual pressure from one or more pressure accumulators 311. The compressor 2 and the valve mechanisms 6, 313 to 315 are controlled so that hydrogen is transferred to one or a plurality of pressure accumulators 311. Specifically, the control device 8 opens the valve mechanism 313 and the valve mechanism 315 corresponding to the valve mechanism 6 and the pressure accumulator 311 having the lowest residual pressure, and only the pressure accumulator 311 having the highest residual pressure is supplied to the compressor 2. The compressor 2 is operated after controlling the corresponding valve mechanism 313 and valve mechanism 314 to be connected. As a result, the hydrogen in the pressure accumulator 311 having the lowest residual pressure is discharged from the outlet 3b of the pressure accumulating unit 3 and led to the inlet side of the compressor 2 through the connecting pipe 5, and is boosted by the compressor 2. Then, it is introduced into the pressure accumulating unit 3 from the inlet 3a through the connecting pipe 7 and transferred to the pressure accumulator 311 having the highest residual pressure.

  Then, when the pressure in the pressure accumulator 311 having the highest residual pressure becomes equal to or higher than the predetermined value (the maximum set pressure is 82 MPa), the control device 8 ends the hydrogen transfer process between the pressure accumulators 311. In the case where the pressure in the pressure accumulator 311 having the highest residual pressure does not exceed the predetermined value with only the hydrogen in the pressure accumulator 311 having the lowest residual pressure, the pressure in the pressure accumulator 311 having the second lowest residual pressure is determined. Is transferred to the pressure accumulator 311 having the highest residual pressure.

  The controller 8 maintains the state in which the residual pressure of at least one of the pressure accumulators 311 is equal to or higher than a predetermined value (for example, 82 MPa, which is the maximum set pressure) by performing such a hydrogen transfer process between the pressure accumulators 311. To do. However, it is not restricted to this, The control apparatus 8 can perform the transfer process of the hydrogen between the pressure accumulators 311 in various aspects.

FIG. 2 is a flowchart illustrating an example of a hydrogen transfer process between the pressure accumulators 311 performed by the control device 8.
In step S <b> 1, the residual pressure (internal pressure) of each accumulator 311 is input from the pressure detection unit 101 to the control device 8.
In step S2, based on the residual pressure (internal pressure) of each pressure accumulator 311 input in step S1, whether or not the residual pressure of at least two pressure accumulators 311 is less than the predetermined value (82 MPa which is the maximum set pressure). If the residual pressure of at least two pressure accumulators 311 is less than the predetermined value, the process proceeds to step S3.

  In step S3, based on the residual pressure (internal pressure) of each accumulator 311 input in step S1, the transfer source accumulator bank 31 from which hydrogen is released and the transfer destination accumulator bank 31 to be filled with hydrogen are determined. For example, the hydrogen consumption in each accumulator bank 31 is estimated based on the residual pressure (internal pressure) of each accumulator 311, and hydrogen is transferred (released) to the accumulator bank 31 having the largest hydrogen consumption (low residual hydrogen). ) And the pressure accumulator bank 31 that consumes the least amount of hydrogen (the amount of residual hydrogen is large) is determined as the pressure accumulator bank 31 that is the transfer destination to be filled with hydrogen. At this time, if there is no accumulator 311 having a residual pressure equal to or higher than the predetermined value (the maximum set pressure of 82 MPa) in all the accumulator banks 31, hydrogen consumption is estimated for all the accumulator banks 31, When there is an accumulator bank 31 in which the accumulator 311 having a residual pressure equal to or greater than the predetermined value (82 MPa which is the maximum set pressure) is present, the other accumulator banks 31 other than the accumulator bank 31 (the residual pressure is The hydrogen consumption is estimated for a predetermined value (there is no pressure accumulator 311 having a maximum set pressure of 82 MPa) or more, and the source accumulator bank 31 and the destination accumulator bank 31 are determined. In addition, even if it is the accumulator bank 31 in which the accumulator 311 whose residual pressure is more than the said predetermined value (82MP which is the maximum setting pressure) exists, any one of the other accumulators 311 of the accumulator bank 31 may be sufficient. If the pressure is less than the set pressure, the hydrogen consumption may be estimated. In other words, when all the pressure accumulators 311 in the pressure accumulator bank 31 are equal to or higher than the respective set pressures, the pressure accumulator bank 31 may be excluded from the hydrogen consumption estimation target.

In step S4, the valve mechanisms 313 and 315 corresponding to the respective pressure accumulators 311 constituting the determined transfer source pressure accumulator bank 31 are opened. Specifically, first, the valve mechanism 315 corresponding to the transfer-source pressure accumulator bank 31 is opened, and the residual pressure is the lowest among a plurality (three in this embodiment) of the pressure-accumulator banks 31. The valve mechanism 313 corresponding to the pressure accumulator 311 is opened.
In step S <b> 5, the valve mechanism 6 that opens and closes the connection pipe 5 is opened, and the outlet portion 3 b of the pressure accumulating unit 3 and the inlet side of the compressor 2 are communicated with each other.
In step S6, the valve mechanism 314 is controlled to disconnect the compressor 2 from the other accumulator bank 31 other than the transfer destination accumulator bank 31.
In step S7, the compressor 2 is operated.

  By the processes of steps S1 to S7, the transfer source accumulator bank 31 for transferring hydrogen and the transfer destination accumulator bank 31 to be charged with hydrogen are determined, and each of the transfer source accumulator banks 31 constituting the transfer source accumulator bank 31 is determined. Hydrogen in the pressure accumulator 311 is transferred to each pressure accumulator 311 constituting the pressure accumulator bank 31 of the transfer destination.

  In step S8, it is determined whether or not hydrogen filling is completed based on the internal pressure value (residual pressure value) in each accumulator 311 constituting the determined accumulator bank 31 of the transfer destination. For example, not only the pressure accumulator 311 having a set pressure of 82 MPa (maximum set pressure) based on the pressure detected by each pressure accumulator 311 constituting the pressure accumulator bank 31 of the transfer destination by the pressure detector 101, but also other pressure accumulators The container 311 also determines that the hydrogen filling of the transfer destination accumulator bank 31 has been completed when the set pressures of 70 MPa and 40 MPa are reached. In this case, for example, when the internal pressure (residual pressure) of each of the pressure accumulators 311 constituting the pressure accumulator bank 31 of the transfer destination reaches each set value by filling with hydrogen, the valve mechanism 314 of the corresponding pressure accumulator bank 31 is obtained. Is disconnected from the compressor 2. When the filling of hydrogen into each pressure accumulator 311 constituting the transfer destination pressure accumulator bank 31 is completed, the process proceeds to step S10. On the other hand, when the filling of hydrogen is not completed even though the residual pressure of the pressure accumulator 311 having the lowest residual pressure corresponding to the valve mechanism 313 opened in step S4 is equal to or lower than a predetermined pressure (for example, approximately 0). The process proceeds to step S9.

  In step S9, the valve mechanism 313 corresponding to the next accumulator 311 in the transfer-source accumulator bank 31, that is, the second accumulator 311 having the second lowest residual pressure is opened to continue the hydrogen filling. In this way, hydrogen is sequentially released from the pressure accumulator 311 having a low residual pressure among the pressure accumulators 311 constituting the transfer source pressure accumulator bank 31, and each pressure accumulator 311 constituting the transfer destination pressure accumulator bank 31 has its own pressure. Filling is continued until the set pressure is reached (until the determination in step S8 is YES). In addition, when filling is not completed only with the pressure accumulator bank 31 determined as the transfer source first, there are other accumulator banks 31 in which the pressure accumulator 311 having a residual pressure less than the predetermined value (82 MPa which is the maximum set pressure) exists. If present, the pressure accumulator bank 31 having the second largest hydrogen consumption (low residual hydrogen) is used as the transfer source accumulator bank 31, and hydrogen is discharged in the same manner. The hydrogen filling is continued until the pressure accumulator 311 reaches the set value. Moreover, if there is no other accumulator bank 31 with the accumulator 311 having a residual pressure less than the predetermined value (82 MPa, which is the maximum set pressure), to each accumulator 311 constituting the accumulator bank 31 of the transfer destination. It is determined that the hydrogen filling process is completed, and the process proceeds to step S10. Note that it may be determined that the filling process is completed when the pressure accumulator 311 having the set pressure of 82 MPa at the transfer destination pressure accumulator bank 31 becomes equal to or higher than the set pressure.

In step S10, the valve mechanisms 313 and 315 opened in step S4 (or steps S4 and S9) and the valve mechanism 6 opened in step S5 are closed.
In step S11, the compressor 2 is stopped.
In step S12, the valve mechanism 314 is controlled, and the compressor 2 and the other accumulator bank 31 other than the transfer destination accumulator bank 31 are connected again.

  In the above-described inter-accumulator hydrogen transfer process, hydrogen is exchanged between the accumulator banks 31 as a unit. However, each accumulator 311 constituting the accumulator bank 31 is a unit. Hydrogen may be transferred between the accumulators 311 so that each accumulator 311 of at least one accumulator bank 31 is filled up to a set pressure. At this time, the pressure accumulator 311 serving as the transfer source is the respective pressure accumulator 311 in the accumulator bank 31 different from the pressure accumulator 311 as the transfer destination in the first embodiment, but is the same as in the embodiment of FIG. Each pressure accumulator 311 in the pressure accumulator bank 31 may be configured to be a transfer source.

  Next, the accumulator 311 constituting the accumulator bank 31 in which the residual pressure is lower than the pressure in the hydrogen transport container 50 (for example, 45 MPa) by the above-described transfer process of hydrogen between the accumulators 311 or the like. The hydrogen in the hydrogen transport container 50 arriving at the hydrogen station 1 is used as a storage container for storing the hydrogen, and the hydrogen in the hydrogen transport container 50 is transferred to the pressure accumulator 311 constituting the accumulator bank 31 and stored. The hydrogen transfer process will be described.

FIG. 3 is a flowchart illustrating an example of a process for transferring hydrogen to the hydrogen station 1.
In step S <b> 21, the connecting pipe 7 is attached to the hydrogen supply port of the hydrogen transport container 50 that has arrived at the hydrogen station 1. As a result, the hydrogen transport container 50 is connected to the compressor 2 via the straight pipe portion 71 of the connecting pipe 7 and also accumulates pressure via a part of the straight pipe portion 71 of the connecting pipe 7 and the branch pipe portion 72. It is connected to the inlet 3a of the unit 3. Here, the connecting pipe 7 is attached to the hydrogen supply port of the hydrogen transport container 50 mounted or connected to the transport vehicle.

  In step S22, a valve mechanism 313 corresponding to a predetermined pressure accumulator 311 that can be used as a hydrogen supply valve and a storage container of the hydrogen transport container 50 is opened. The hydrogen supply valve is provided at, for example, the hydrogen supply port or in the vicinity thereof, and opens the valve mechanism 313 corresponding to the hydrogen supply valve and the pressure accumulator 311 that can be used as a storage container. Hydrogen is transferred by differential pressure to a pressure accumulator 311 that can be used as a storage container. That is, the transfer of hydrogen to the hydrogen station 1 is started. Specifically, the hydrogen in the hydrogen transport container 50 is transferred from the transfer source in the hydrogen transfer process between the pressure accumulators 311 described above via a part of the straight pipe part 71 of the connecting pipe 7 and the branch pipe part 72. The accumulated pressure is transferred to each pressure accumulator 311 of the accumulator bank 31 by differential pressure and stored in each pressure accumulator 311.

  In step S23, it is determined whether or not the pressure change rate is equal to or less than a predetermined value based on the pressure value detected by the pressure detection unit 101 corresponding to the pressure accumulator 311 to which hydrogen is transferred by the differential pressure. If it becomes below, it will progress to step S24. The predetermined value of the rate of change in pressure is set as a value at which the pressure of the hydrogen transport container 50 and the pressure of the accumulator 311 at the transfer destination are approximately the same, and the hydrogen transfer rate is approximately zero.

  In step S <b> 24, the compressor 2 is operated by the control device 8. When the compressor 2 is operated, the hydrogen in the hydrogen transport container 50 is increased in pressure by the compressor 2 and transferred to the pressure accumulating unit 3. Specifically, the hydrogen in the hydrogen transport container 50 is guided to the compressor 2 through the straight pipe portion 71 of the connecting pipe 7, and is boosted by the compressor 2 without being stored to the pressure accumulating unit 3. Be transported.

  In step S25, it is determined whether or not a predetermined time has elapsed since the hydrogen transport container 50 arrived at the hydrogen station 1. When the predetermined time has elapsed, the process proceeds to step S26. This predetermined time is set in advance based on, for example, the time during which the hydrogen station 1 can stay the hydrogen transport container 50 (for example, 2 hours).

In step S26, the hydrogen supply valve is closed.
In step S27, the compressor 2 is stopped.
In step S <b> 28, the connecting pipe 7 is removed from the hydrogen supply port of the hydrogen transport container 50.
Thereby, the transfer (unloading) of hydrogen from the hydrogen transport container 50 to the hydrogen station 1 is completed. Further, the transport vehicle on which the hydrogen transport container 50 is mounted or connected can be moved from the hydrogen station 1. Therefore, for example, the hydrogen transport container 50 can be moved to another hydrogen station and hydrogen can be supplied to the other hydrogen station.

  In addition, in order to use the pressure accumulator 311 constituting the pressure accumulator bank 31 as a storage container, a hydrogen transfer process in which hydrogen is interchanged between the pressure accumulators, the residual pressure is set to a predetermined value (maximum setting) in all the pressure accumulator banks 31. Even when the pressure accumulator 311 having a pressure equal to or higher than 82 MPa is present, it may be performed before the hydrogen transport container 50 arrives at the hydrogen station 1. In this case, the transfer destination accumulator need not have the set pressure of the predetermined value (82 MPa), and may be an accumulator having a set pressure (40 MPa or 70 MPa) lower than the predetermined value. In addition, as a pressure accumulator bank used as a storage container, the hydrogen consumption or residual hydrogen of each accumulator bank 31 is estimated based on the residual pressure (internal pressure) of each accumulator 311, and the hydrogen consumption is the highest. The pressure accumulator bank 31 having the largest amount or the smallest residual hydrogen may be selected.

  According to the hydrogen station 1 having such a configuration, the hydrogen fuel tank mounted on the fuel cell vehicle is boosted and transferred from the accumulator bank 31 having a high hydrogen consumption to the accumulator bank 31 having a low hydrogen consumption. It is possible to always prepare the accumulator bank 31 including the accumulator 311 having a maximum set pressure (for example, 82 MPa) higher than the maximum operating pressure (for example, 70 MPa). Therefore, for example, when a fuel cell vehicle comes to the hydrogen station 1, it is possible to avoid the problem that hydrogen cannot be replenished to the fuel cell vehicle due to insufficient residual pressure even though hydrogen remains in the accumulator. It is possible to improve the hydrogen filling capacity of the hydrogen fuel tank by effectively using the hydrogen remaining in each pressure accumulator.

  Moreover, in addition to being able to effectively use the residual hydrogen by interchanging the residual hydrogen between the pressure accumulators, using a pressure accumulator having a low residual pressure generated by the hydrogen transfer process between the pressure accumulators as a storage container, Since the hydrogen in the hydrogen transport container can be transferred to the accumulator by a differential pressure and stored, the hydrogen can be unloaded from the hydrogen transport container to the off-site type station in a shorter time than before. As a result, it is not necessary to leave the hydrogen transport container in the off-site hydrogen station for a long time. For example, one hydrogen transport container can supply hydrogen to a plurality of off-site hydrogen stations. Therefore, the transportation cost of hydrogen can be greatly reduced compared to the conventional case. In addition, the burden on the facility of the off-site type hydrogen station can be reduced.

FIG. 4 is a flowchart showing another example of the process of transferring hydrogen to the hydrogen station 1.
This hydrogen transfer process is an example in which the transfer (unloading) of hydrogen to the hydrogen station 1 is performed only by the differential pressure and the compressor 2 is not used.

  That is, steps S31 to S33 are the same as steps 21 to 23 in FIG. 3, and the connecting pipe 7 is attached to the hydrogen supply port of the hydrogen transport container 50 that has arrived at the hydrogen station 1 in step S31. The hydrogen supply valve of the transport container 50 and the valve mechanism 313 corresponding to a predetermined pressure accumulator 311 that can be used as a storage container are opened to start the transfer of hydrogen to the hydrogen station 1 and detected by the pressure detection unit 101 in step S33. It is determined whether or not the pressure change rate is equal to or less than a predetermined value based on the pressure value. If it is determined in step S33 that the pressure change rate is equal to or less than the predetermined value, the process proceeds to step S34.

  In step S34, the connecting pipe 7 is removed from the hydrogen supply port of the hydrogen transport container 50, as in step S28 of FIG. Thereby, the transfer (unloading) of hydrogen from the hydrogen transport container 50 to the hydrogen station 1 is completed.

Next, a second embodiment of the present invention will be described.
FIG. 5 shows a configuration of the hydrogen station 10 according to the second embodiment. In the following description, elements common to the hydrogen station 1 according to the first embodiment are denoted by the same reference numerals and the functions thereof are also the same.
As shown in FIG. 5, the hydrogen station 10 according to the second embodiment has substantially the same configuration as the hydrogen station 1 according to the first embodiment shown in FIG. 1, but the hydrogen in the hydrogen transport container 50 is transferred to the hydrogen station 1. The connecting pipe 7 having the function of a hydrogen transfer pipe for transferring to the right side is only a straight pipe section, and the branch pipe section 72 that bypasses the compressor 2 is omitted. The connecting pipe 7 connects the hydrogen transport container 50 and the compressor 2 by being attached to the hydrogen transport container 50.

  In the hydrogen station 10 having such a configuration, the transfer process of hydrogen between the pressure accumulators 313 is the same as that of the first embodiment. Further, in the hydrogen transfer process from the hydrogen transport container 50 to the hydrogen station 10, not the pressure difference but the hydrogen pressure increased via the compressor 2 is transferred to each pressure accumulator 313.

  FIG. 6 shows a hydrogen station 20 according to a modification of the first embodiment. In the following description, elements common to the hydrogen station 1 according to the first embodiment are denoted by the same reference numerals and the functions thereof are also the same.

  The hydrogen station 20 according to the modification of the first embodiment of FIG. 6 uses a medium pressure vessel (medium pressure bank) in addition to the accumulator bank 31 as a storage vessel, and can store hydrogen in the hydrogen transport vessel 50. It is a thing. As shown in FIG. 6, the hydrogen station 20 according to the modification of the first embodiment includes two compressors 11 and 12 and an intermediate pressure vessel (intermediate pressure bank) disposed between the two compressors 11 and 12. ) 13 and the connecting pipe 14 that connects the intermediate position of the branch pipe portion 72 of the connecting pipe 7 and the inlet side of the intermediate pressure vessel 13, which is different from the hydrogen station 1 according to the first embodiment (others) Is the same as the hydrogen station 1 according to the first embodiment). The branch pipe portion 72 is provided with check valves 60A and 60B on the front side and the front side of the connecting portion of the connecting pipe 14, respectively. The check valves 60A and 60B are provided in the first embodiment. This corresponds to the check valve 60 in the embodiment.

  The compressors 11 and 12 correspond to the compressor 2 in the first embodiment. The intermediate pressure vessel 13 stores hydrogen that has been pressurized by the first compressor 11. The intermediate pressure vessel 13 stores, for example, 30 to 40 MPa of hydrogen. The second compressor 12 boosts the hydrogen in the intermediate pressure vessel 13 and supplies it to the pressure accumulating unit 3. In the hydrogen station 20, when the hydrogen in the accumulator bank 31 is reduced by filling the hydrogen fuel tank with hydrogen, the hydrogen in the intermediate pressure vessel 13 can be supplied to the accumulator bank 31.

  When hydrogen is supplied from the hydrogen transport container 50 to the hydrogen station 20 according to the above modification, the hydrogen supply valve on the hydrogen transport container 50 side and the pressure accumulator 311 that can be used as a storage container in step S22 of FIG. When the valve mechanism 313 is opened, the hydrogen in the hydrogen transport container 50 can be stored in the hydrogen transfer process between the accumulators through a part of the straight pipe portion 71 of the connecting pipe 7 and the branch pipe portion 72. While being transferred to each pressure accumulator 311 of the accumulator bank 31 by differential pressure, it is transferred to the intermediate pressure vessel 13 whose pressure has been lowered by hydrogen supply to the accumulator bank 31 via the connection pipe 14. The After that, when the first compressor 11 and the second compressor 12 are operated in step S24 of FIG. 3, the hydrogen in the intermediate pressure vessel 13 is boosted by the second compressor 12 and transferred to the pressure accumulating unit 3 to transfer hydrogen. Hydrogen in the container 50 is pressurized by the first compressor 11 and the second compressor 12 and transferred to the pressure accumulating unit 3.

  According to the hydrogen station 20 having such a configuration, in addition to the effective utilization of the residual hydrogen by interchanging the residual hydrogen between the pressure accumulators, the pressure accumulator having a low residual pressure generated by the hydrogen transfer process between the pressure accumulators. In addition, since the intermediate pressure vessel can be used as a storage vessel, more hydrogen can be transferred (unloaded) in a short time from the hydrogen transport vessel to the off-site type station.

Next, a third embodiment of the present invention will be described.
FIG. 7 shows the configuration of an off-site hydrogen station according to the third embodiment of the present invention. In the following description, elements common to the hydrogen station 1 according to the first embodiment are denoted by the same reference numerals and the functions thereof are also the same.
As shown in FIG. 7, the hydrogen station 30 according to the third embodiment is different from the hydrogen station 1 according to the first embodiment shown in FIG.

  In the accumulator unit 3A of the hydrogen station 30 according to the third embodiment, each accumulator 311A constituting the accumulator bank 31A has a separate inlet for filling hydrogen and an outlet for discharging hydrogen. A check valve 322 is provided on the inlet side (compressor 2 side) of each pressure accumulator 311A. In addition, on the outlet side (dispenser 4 side) of each pressure accumulator 311A, a valve mechanism 323 for allowing or stopping the release of hydrogen from each pressure accumulator 311A and a pressure detection unit 101 are provided. When 323 is opened, hydrogen is released from the corresponding pressure accumulator 311A through the connecting pipe. In the present embodiment, the valve mechanism 323 corresponds to the second valve mechanism of the present invention.

  Further, the pressure accumulating unit 3A includes a selection device 320 capable of selecting one or a plurality of pressure accumulators 311A connected to the compressor 2, and the selection device 320 and each pressure accumulator 311A in the pressure accumulator bank 31A are respectively The hydrogen boosted by the compressor 2 is supplied to the pressure accumulator 311A selected by the selection device 320 through each connection pipe. In the present embodiment, the selection device 320 corresponds to the first valve mechanism of the present invention.

  The control device 8A of the hydrogen station 30 according to the third embodiment includes the internal pressure (residual pressure) of each accumulator 311A detected by the pressure detection unit 101 and information (residual pressure, maximum pressure) input to the dispenser 4 The compressor 2, the valve mechanism 6, the valve mechanism 323, the selection device 320, and the like are appropriately controlled based on various types of information including operating pressure and the like, and an operation command by the operator. In the present embodiment, in the default state, the valve mechanism 6 and the valve mechanism 323 are closed, and the selection device 320 connects the compressor 2 and all the pressure accumulators 311A.

FIG. 8 is a flowchart showing an example of a hydrogen transfer process between the pressure accumulators 311A performed in the hydrogen station 30 according to the third embodiment.
The hydrogen transfer process between the pressure accumulators 311A performed in the hydrogen station 30 according to the third embodiment is substantially the same as the hydrogen transfer process between the pressure accumulators 311 of the hydrogen station 1 according to the first embodiment shown in FIG. The control device 320 and the valve mechanism 323 are controlled in place of the valve mechanisms 314 and 316.

In step S41, the residual pressure (internal pressure) of each accumulator 311A is input from the pressure detection unit 101 to the control device 8A.
In step S42, based on the residual pressure (internal pressure) of each pressure accumulator 311A input in step S41, whether or not the residual pressure of at least two pressure accumulators 311A is less than the predetermined value (82 MPa which is the maximum set pressure). If the residual pressure of at least two pressure accumulators 311A is less than the predetermined value, the process proceeds to step S43.

  In step S43, the source accumulator bank 31A and the destination accumulator bank that release hydrogen based on the residual pressure (internal pressure) of each accumulator 311A input in step S41 in the same manner as in step S3 of FIG. 31A is determined.

In step S44, the valve mechanism 323 corresponding to each pressure accumulator 311A that constitutes the determined transfer source pressure accumulator bank 31A is opened. Specifically, the valve mechanism 323 corresponding to the pressure accumulator 311A having the lowest residual pressure among a plurality of (three in the present embodiment) pressure accumulators 311A of the accumulator bank 31A is opened.
In step S45, the valve mechanism 6 is opened, and the outlet side of the pressure accumulating unit 3A and the inlet side of the compressor 2 are communicated.
In step S46, the selection device 320 is controlled to release the connection between the compressor 2 and the other accumulator bank 31A other than the destination accumulator bank 31A.
In step S47, the compressor 2 is operated.

  In step S48, it is determined whether or not hydrogen filling is completed as in step S8 of FIG. When it is determined that hydrogen filling is completed, the selection device 320 is controlled to disconnect the transfer destination pressure accumulator 311A from the compressor 2. When the filling of hydrogen into each of the pressure accumulators 311A constituting the destination pressure accumulator bank 31A is completed, the process proceeds to step S50. On the other hand, when the filling of hydrogen is not completed even though the residual pressure of the pressure accumulator 311A as the transfer source is equal to or lower than a predetermined pressure (for example, approximately 0), the process proceeds to step S49.

In step S49, hydrogen filling is continued in the same manner as in step S9 of FIG.
In step S50, the valve mechanism 323 opened in step S44 (or step S44 and step S49) and the valve mechanism 6 opened in step S45 are closed.
In step S51, the compressor 2 is stopped.
In step S52, the selection device 320 is controlled to reconnect the compressor 2 and the other accumulator bank 31A other than the transfer destination accumulator bank 31A.

  According to the hydrogen station 30 having such a configuration, the hydrogen fuel tank mounted on the fuel cell vehicle is boosted and transferred from the accumulator bank 31A having a high hydrogen consumption to the accumulator bank 31A having a low hydrogen consumption. It is possible to always prepare an accumulator bank 31A including an accumulator 311A having a maximum set pressure (for example, 82 MPa) higher than the maximum operating pressure (for example, 70 MPa). In addition, since hydrogen can be transferred between the respective accumulators 311A in the same accumulator bank 31A, the hydrogen remaining capacity in each accumulator can be effectively used to further improve the hydrogen filling capacity to the hydrogen fuel tank. It becomes possible to plan.

  Note that, in a configuration in which hydrogen can be transferred (unloaded) from the hydrogen transport container 50 by a differential pressure as in the hydrogen stations 1, 20, and 30, a low pressure dedicated to storage whose internal pressure is lower than the pressure in the hydrogen transport container 50. It is good also as a structure which can provide a container (low pressure bank) separately, and can transfer (unload) hydrogen to the low pressure container from the hydrogen transport container 50 by a differential pressure. In this case, more hydrogen can be transferred (unloaded) from the hydrogen transport container to the off-site station in a short time.

  You may apply the structure of the pressure accumulation unit of 3rd Embodiment to the modification of 2nd Embodiment shown in FIG. 5, and 1st Embodiment shown in FIG.

Up to this point, the method of transporting hydrogen with compressed hydrogen gas from the hydrogen production site to the hydrogen station has been described for the off-site type hydrogen station, but the same applies to the case of transporting with liquid hydrogen.
FIG. 9 shows the configuration of an off-site type hydrogen station using the method of transporting with liquid hydrogen according to the fourth embodiment of the present invention.
In FIG. 9, the hydrogen station 40 of this embodiment is different from the hydrogen station 1 of the first embodiment in that a liquid hydrogen storage container 51, a liquid hydrogen booster 52, and a vaporizer 53 are used instead of the hydrogen transport container 50. A hydrogen container 54, a pipe 55 connecting the vaporizer 53 and the inlet 3 a of the pressure accumulating unit 3, and a boil-off gas supply pipe 56 that supplies boil-off gas (hydrogen) generated from the liquid hydrogen storage container 51 to the hydrogen container 54. Is different. The hydrogen container 54 is connected to the straight pipe portion 71 of the connecting pipe 7. The configuration downstream of the connecting pipe 7 is the same as the configuration of the hydrogen station 1 of the first embodiment shown in FIG.

  Liquid hydrogen is supplied to the liquid hydrogen storage container 51 from the outside. The evaporated hydrogen gas is boiled off from the liquid hydrogen storage container 51 and stored in the hydrogen container 54 through the boiloff gas supply pipe 56. When the pressure of the hydrogen container 54 is higher than the pressure of the pressure accumulator 311, hydrogen can be transferred from the hydrogen container 54 to the pressure accumulator 311 via the branch pipe portion 72 with a differential pressure. The liquid hydrogen is sent from the liquid hydrogen storage container 51 to the liquid hydrogen booster 52 and boosted to a predetermined pressure, and then becomes hydrogen gas in the vaporizer 53 and sent to the pressure accumulator 311. The hydrogen transfer process between the pressure accumulators is the same as in the first embodiment, and a description thereof will be omitted.

  As a modification of FIG. 9, like the off-site type hydrogen station 40 ′ shown in FIG. 10, the liquid hydrogen booster 52 is omitted, and the pipe 55 is connected to the hydrogen container 54, and the hydrogen vaporized by the vaporizer 53. The gas may be stored in the hydrogen container 54. Other configurations are the same as the hydrogen station 40 of the fourth embodiment shown in FIG.

FIG. 11 shows a configuration of an on-site hydrogen station according to the fifth embodiment of the present invention.
In FIG. 11, this on-site type hydrogen station 60 differs from the hydrogen station 1 of the first embodiment in that a hydrogen production facility 61 and a hydrogen container 62 are provided instead of the hydrogen transport container 50. The container 62 is connected to the straight pipe portion 71 of the connecting pipe 7. The configuration downstream of the connecting pipe 7 is the same as the configuration of the hydrogen station 1 of the first embodiment shown in FIG.

  The hydrogen production facility 61 may be any hydrogen production facility, but city gas, liquefied petroleum gas (LPG), naphtha, kerosene, methanol, organic hydride (a liquid that easily generates hydrogen gas by dehydrogenation reaction) may be used as the hydrogen production raw material. And a hydrogen production facility using cyclohexane, methylcyclohexane, decalin and its derivatives, 2-propanol and the like. These raw materials are gas or liquid, and can be easily transported by pipelines, cylinders, lorries and the like.

  In general, the hydrogen production facility 61 is composed of a hydrogen production device and a hydrogen purification device. The hydrogen production device produces hydrogen from the above raw materials by a steam reforming reaction, a dehydrogenation reaction, etc., and the hydrogen purification device purifies the hydrogen to produce a product. Produce hydrogen. The produced product hydrogen is stored in the hydrogen container 62.

  In the on-site type hydrogen station 60 of the present embodiment, the pressure accumulation unit 3 is connected via a connecting pipe 7. When the pressure in the hydrogen container 62 is higher than the pressure in the pressure accumulator 311, hydrogen can be transferred from the hydrogen container 62 to the pressure accumulator 311 through the branch pipe portion 72 with a differential pressure. The hydrogen transfer process between the pressure accumulators is the same as in the first embodiment, and a description thereof will be omitted.

  The off-site type hydrogen station 10 according to the second embodiment of the present invention, the off-site type hydrogen station 30 according to the third embodiment, and the off-site type hydrogen station 20 according to the modification of the first embodiment are turned on. It can be replaced with a site-type hydrogen station. When the off-site type hydrogen station 30 of the third embodiment is replaced with an on-site type hydrogen station and the off-site type hydrogen station 20 according to the modification of the first embodiment is replaced with the on-site type hydrogen station of the present embodiment. However, when the pressure in the hydrogen container 62 is higher than the pressure in the accumulator 311, hydrogen can be transferred from the hydrogen container 62 to the accumulator 311 through the branch pipe portion 72 with a differential pressure.

  1,10,20,30,40,40 '... off-site type hydrogen station, 2,11,12 ... compressor, 3,3A ... accumulation unit, 4 ... dispenser, 5 ... connecting pipe (return line), 6 ... Valve mechanism, 7 ... Connecting pipe, 8, 8A ... Control device, 31, 31A ... Pressure accumulator bank, 50 ... Hydrogen transport container, 51 ... Liquid hydrogen storage container, 52 ... Liquid hydrogen booster, 53 ... Vaporizer, 54 62 ... Hydrogen container, 55 ... Piping, 56 ... Boil-off gas supply pipe, 60 ... On-site hydrogen station, 61 ... Hydrogen production equipment, 71 ... Straight pipe part, 72 ... Branch pipe part (transfer line), 311 and 311A ... pressure accumulator, 60, 60A, 60B, 312, 316, 322 ... check valve, 313-315, 323 ... valve mechanism, 320 ... selection device

Claims (7)

A hydrogen station comprising a compressor for boosting hydrogen and a pressure accumulating unit having a plurality of pressure accumulators capable of storing hydrogen boosted by the compressor, and filling a hydrogen fuel tank with hydrogen stored in the pressure accumulating unit. There,
A hydrogen station configured to boost hydrogen in a pressure accumulator having the lowest residual pressure among the plurality of pressure accumulators and transfer the hydrogen to another pressure accumulator. A first valve mechanism that allows or stops filling of each accumulator with hydrogen;
A second valve mechanism that allows or stops the release of hydrogen from each accumulator;
A return line for returning hydrogen released from each pressure accumulator to the inlet side of the compressor;
A pressure detector that detects the residual pressure of each accumulator;
The compressor boosts the hydrogen in the lowest accumulator residual pressure detected by the pressure detecting portion of the plurality of accumulator as cause feed transfer to other accumulator, the first valve mechanism And a control device for controlling the second valve mechanism;
The hydrogen station according to claim 1, comprising: Before SL controller if all residual pressure of the plurality of pressure accumulator is less than the predetermined value, residual pressure to the lowest accumulator in the highest pressure accumulator residual pressure boosts the hydrogen transfer The hydrogen station according to claim 2, wherein the compressor, the first valve mechanism, and the second valve mechanism are controlled so as to be sent. When the pressure in the pressure accumulator with the highest residual pressure does not exceed the predetermined value only with hydrogen in the pressure accumulator with the lowest residual pressure, the control device further has the second lowest residual pressure. 4. The hydrogen station according to claim 3, wherein the compressor, the first valve mechanism, and the second valve mechanism are controlled so as to transfer hydrogen therein to the pressure accumulator having the highest residual pressure. An off-site hydrogen station,
The hydrogen station according to any one of claims 1 to 4, wherein the pressure accumulator having the lowest residual pressure after hydrogen transfer is used as a storage container for storing hydrogen transferred from a hydrogen transport container . By attaching to the hydrogen transport container, the hydrogen transport container and the pressure accumulating unit are connected without interposing the compressor, and the hydrogen in the hydrogen transport container is connected to the storage container by a differential pressure. The hydrogen station according to claim 5 , further comprising a transfer line that can be transferred. The hydrogen station according to claim 5 or 6 , comprising a liquid hydrogen storage container for storing liquid hydrogen transported from the outside and a hydrogen container for storing hydrogen gasified from the liquid hydrogen, instead of the hydrogen transport container.