JP6364296B2 - Hydrogen station and method of operating hydrogen station - Google Patents

Description

  The present invention relates to a hydrogen station and a method for operating the hydrogen station.

  As a conventional hydrogen station, for example, as described in Patent Document 1, a pressure accumulating unit that stores hydrogen at a high pressure, a pressure increasing unit that pressurizes hydrogen supplied from the outside and fills the pressure accumulating unit, and a pressure accumulating unit And a dispenser for filling the vehicle with hydrogen. In the hydrogen station described in Patent Document 1, various devices are appropriately arranged in a cabinet in order to improve safety and workability.

JP 2013-167288 A

  By the way, normally, in the hydrogen station as described above, after filling the hydrogen to be filled (hereinafter also simply referred to as “hydrogen filling”), it is necessary to depressurize the filling nozzle in order to remove the filling nozzle, for example. Therefore, at least a part of hydrogen in the system is released out of the system through a vent stack or the like. Therefore, there is a possibility that a loss of hydrogen (that is, out-of-system release loss) may occur due to out-of-system release.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the operating method of a hydrogen station and a hydrogen station which can reduce the out-of-system discharge loss.

  A hydrogen station according to the present invention includes a boosting unit that boosts hydrogen, a hydrogen supply line that supplies hydrogen to the boosting unit, a pressure accumulating unit that is connected to the boosting unit, stores hydrogen, and is connected to the pressure accumulating unit. A precooler that cools the hydrogen to be charged into the precooler, and a filling nozzle that is connected to the precooler and fills the filling target with hydrogen.On the hydrogen line between the shut-off valve on the outlet side of the precooler and the filling nozzle, A recovery line for recovering hydrogen to the hydrogen supply line after completion of hydrogen filling to the filling target is connected.

  The operation method of the hydrogen station according to the present invention includes a boosting unit that boosts hydrogen, a hydrogen supply line that supplies hydrogen to the boosting unit, a pressure accumulating unit that stores hydrogen, and is connected to the pressure accumulating unit. An operation method of a hydrogen station comprising: a precooler that cools hydrogen to be filled in a filling object; and a filling nozzle that is connected to the precooler and fills the filling object with hydrogen, after the filling of hydrogen into the filling object is completed And a hydrogen recovery step of recovering hydrogen to the hydrogen supply line from the hydrogen line between the shut-off valve on the outlet side of the precooler and the filling nozzle.

  In such a hydrogen station and the operation method of the hydrogen station, after filling the hydrogen to be filled, hydrogen in the system after the shut-off valve on the precooler outlet side is not discharged out of the system, but at a low pressure location in the hydrogen station. Can be recovered to the hydrogen supply line. Accordingly, it is possible to reduce hydrogen release loss.

  Further, as a configuration that preferably exhibits the above-described effects, specifically, a hydrogen supply line is provided with a hydrogen holder, and a recovery line is connected to the upstream side of the hydrogen holder in the hydrogen supply line Is mentioned.

  ADVANTAGE OF THE INVENTION According to this invention, the operating method of a hydrogen station and a hydrogen station which can reduce the out-of-system discharge loss of hydrogen can be provided.

It is a system configuration figure showing a hydrogen station concerning a 1st embodiment. It is a flowchart for demonstrating the operating method of the hydrogen station of FIG. It is a system block diagram which shows the hydrogen station which concerns on 2nd Embodiment. It is a flowchart for demonstrating the operating method of the hydrogen station of FIG. It is a system block diagram which shows the hydrogen station which concerns on 3rd Embodiment. It is a system block diagram which shows the hydrogen station which concerns on 4th Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted.

[First Embodiment]
FIG. 1 is a system configuration diagram showing a hydrogen station 100 according to a first embodiment which is a reference embodiment . As shown in FIG. 1, the hydrogen station 100 according to the present embodiment is a facility for supplying hydrogen to a filling target. The hydrogen station 100 can be used as hydrogen to be supplied to the object to be filled with hydrogen refined at another facility and carried by the trailer T and hydrogen produced by the hydrogen production apparatus S in the station. Examples of the filling target include a hydrogen fuel vehicle such as a fuel cell vehicle, a fuel cell forklift, and a fuel cell motorcycle. The hydrogen station 100 may use hydrogen from a hydrogen girdle container, an external hydrogen supply pipeline, or the like as hydrogen to be supplied to a filling target.

  The hydrogen station 100 includes a hydrogen holder 1 that receives and temporarily stores hydrogen, a first pressure increase unit 2 that increases pressure on the front side, a first pressure storage unit 3 that stores hydrogen on the front side, and a rear side. A second pressure-increasing unit 4 for boosting hydrogen, a second pressure accumulating unit 6 for storing hydrogen on the rear stage side, a precooler 10 for cooling the hydrogen to be filled in the filling target, and a dispenser 11 for filling the filling target with hydrogen And. In the present embodiment, the FCV 30 is exemplified as the filling target.

  The hydrogen holder 1 is connected to the hydrogen transport container bank of the trailer T via a line L21. Further, the hydrogen holder 1 is connected to the hydrogen production apparatus S via a line L22. The hydrogen holder 1 receives hydrogen from the hydrogen transport container bank and / or the hydrogen production apparatus S loaded on the trailer T and temporarily stores the hydrogen. In addition, the hydrogen holder 1 is connected to the suction side of the first pressure accumulating unit 3 via the line L <b> 23 and supplies hydrogen to the first pressure accumulating unit 3. Note that the maximum filling pressure of the hydrogen transport container bank of the trailer T is set to 45 MPa, for example. The upper limit of the pressure of the hydrogen holder 1 is, for example, 0.6 to 2 MPa, and is approximately 1 MPa here. The lines L21 to L23 are hydrogen passages through which hydrogen flows, and are formed by, for example, piping (the same applies to the following lines).

The 1st pressure | voltage rise part 2 is comprised by the compressor which compresses hydrogen. The first booster 2 here is constituted by a low-pressure compressor whose compression pressure is lower than that of the second booster 4. The compressor which comprises the 1st pressure | voltage rise part 2 can compress hydrogen, for example to 20-45 Mpa, and can pump hydrogen at 100-300 Nm < ³ > / hr. The first booster 2 is connected to the first accumulator 3 via a line L2.

  The first accumulator 3 stores the hydrogen boosted by the first booster 2. The first pressure accumulating unit 3 is composed of a plurality of pressure accumulators 8. The maximum filling pressure of the pressure accumulator 8 is set to 70 to 95 MPa. The pressure accumulator 8 is constituted by a plurality of or a single container. In FIG. 1, the first pressure accumulator 3 includes one pressure accumulator 8, but the number of the pressure accumulators 8 included in the first pressure accumulator 3 is not particularly limited. A line L3 is drawn from the pressure accumulator 8, and the line L3 is connected to the suction side of the second booster 4. The line L3 may be connected to the line L21 connected to the trailer T.

The 2nd pressure | voltage rise part 4 is comprised by the compressor which compresses hydrogen. Here, the second booster 4 is configured by a high-pressure compressor having a higher compression pressure than the first booster 2. The compressor which comprises the 2nd pressure | voltage rise part 4 can compress hydrogen, for example to 70-95 Mpa, and can pump 100-1200 Nm < ³ > / hr hydrogen.

  The second pressure accumulator 6 stores the hydrogen boosted by the second booster 4. The second pressure accumulator 6 is composed of a plurality of pressure accumulators 9. The maximum filling pressure of the pressure accumulator 9 is set to 70 to 95 MPa. The pressure accumulators 9 are each constituted by a plurality of or a single container. In FIG. 1, the second accumulator 6 includes three accumulators 9, but the number of the accumulators 9 is not particularly limited.

  A line L5 for distributing hydrogen to each pressure accumulator 9 is connected to the second booster 4. The line L5 branches to lines L6 to L8, and these lines L6 to L8 are connected to the inlet side (upstream side in the hydrogen flow direction) of each pressure accumulator 9, respectively. Further, lines L10 to L12 are drawn from each pressure accumulator 9, and these lines L10 to L12 are connected to a line L13. The line L13 is connected to the inlet side of the precooler 10.

  Of the three pressure accumulators 9 shown in FIG. 1, the pressure accumulator 9A functions as a pressure accumulator (hereinafter referred to as “high pressure bank 9A”) for charging hydrogen at a high pressure, and the pressure accumulator 9C It functions as a pressure accumulator (hereinafter referred to as “low pressure bank 9C”) for filling hydrogen at a pressure lower than that of the bank 9A. The pressure accumulator 9B is filled with hydrogen at a pressure between the high pressure bank 9A and the low pressure bank 9C. Functions as a pressure accumulator (hereinafter referred to as “intermediate pressure bank”).

  The precooler 10 is connected to each pressure accumulator 9 of the second pressure accumulator 6 through lines L10 to L13. The precooler 10 cools the hydrogen charged in the FCV 30 to, for example, about −40 ° C. by circulating a refrigerant, for example. The precooler 10 has a shut-off valve 14 on the outlet side (downstream side in the hydrogen flow direction). The shut-off valve 14 shuts off the hydrogen flow to the downstream side by closing the valve.

  The dispenser 11 is connected to the precooler 10 via the line L14. The dispenser 11 is provided with an emergency release coupler 15 and a filling nozzle 16 on the outlet side. The emergency detachment coupler 15 prevents high-pressure hydrogen from being ejected by separating and separating the coupling portion when a strong tensile force is applied to the filling hose 17 connected to the emergency detachment coupler 15. . The filling nozzle 16 is provided at the downstream end of the filling hose 17. The filling nozzle 16 is connected to a nozzle port (not shown) of the FCV 30 when filling the FCV 30 with hydrogen.

  With the above configuration, on the front stage side of the hydrogen station 100, for example, hydrogen from the hydrogen transport container bank of the trailer T and / or the hydrogen production apparatus S is received by the hydrogen holder 1 and temporarily stored. The hydrogen in the hydrogen holder 1 is boosted by the first booster 2, supplied to the first pressure accumulator 3, and stored. The hydrogen stored in the first pressure accumulator 3 is supplied to the second pressure booster 4 on the rear stage side of the hydrogen station 100 via the line L3. The hydrogen boosted by the first booster 2 may be supplied directly to the second booster 4 without being supplied to the first accumulator 3 or at the same time as the supply.

  On the rear stage side of the hydrogen station 100, the hydrogen supplied from the front stage side is stored in the second pressure accumulating section 6 via the second pressure increasing section 4. At this time, it is necessary to keep the residual pressure high in the order of the high pressure bank 9A, the intermediate pressure bank 9B, and the low pressure bank 9C. The supplied hydrogen is first supplied to the high pressure bank 9A and then the intermediate pressure bank 9A. 9B and finally to the low-pressure bank 9C.

  When hydrogen is charged into the FCV 30, the hydrogen stored in any of the pressure accumulators 9 of the second pressure accumulating unit 6 is cooled by the precooler 10 and charged into the FCV 30 via the dispenser 11. In the present embodiment, after the FCV 30 is filled with hydrogen in the low pressure bank 9C or the intermediate pressure bank 9B, the FCV 30 is filled with hydrogen in the high pressure bank 9A maintained at a high pressure as finish filling.

  Here, in the hydrogen station 100, a recovery line L0 is provided to recover the hydrogen in the system after filling the FCV 30 with hydrogen. One end on the upstream side in the recovery line L0 is connected to a hydrogen line between the downstream side of the shutoff valve 14 in the precooler 10 and the filling nozzle 16 in the dispenser 11. In the illustrated example, one end of the collection line L0 is connected to a line L14 between the precooler 10 and the dispenser 11. On the other hand, the other end on the downstream side of the recovery line L0 is connected to a line L22 for flowing hydrogen to the hydrogen holder 1.

  A check valve 21 is provided in the recovery line L0. The check valve 21 prevents the reverse flow of hydrogen flowing through the recovery line L0, that is, the flow from the hydrogen holder 1 side to the precooler 10 side. An automatic valve 22 is provided upstream of the check valve 21 in the recovery line L0. The automatic valve 22 permits or blocks the flow of hydrogen on the recovery line L0 by opening and closing. Note that the opening and closing (operation and stop) of the automatic valve 22 may be controlled by a control unit (not shown) connected to the automatic valve 22.

  Such a recovery line L0 is used for hydrogen in the system after the shutoff valve 14 at the outlet of the precooler 10 (emergency separation coupler 15, the filling nozzle 16 and the filling hose) when the pressure of the filling nozzle 16 is released after the hydrogen filling to the FCV 30 is completed. (Hydrogen in 17 etc.) is circulated back to the line L21 on the upstream side of the hydrogen holder 1. That is, the hydrogen on the downstream side of the precooler 13 is recovered upstream of the suction port of the first pressure increasing unit 2, which is one of the lowest pressure locations in the hydrogen station 100.

  The recovery line L0 is connected to a line L21 on the upstream side of the hydrogen holder 1 as a destination for recovering hydrogen. However, the configuration is not limited to this configuration. You may connect to line L23 (namely, suction piping of the 1st pressure | voltage rise part 2). In short, the recovery line L0 may be connected to a hydrogen supply line that is a hydrogen flow path for supplying hydrogen to the first booster 2. In the above, the lines L21 to L23 constitute a hydrogen supply line. Incidentally, the hydrogen supply line can be configured not only by piping but also by an apparatus or equipment as long as hydrogen is circulated toward the first pressure raising unit 2. Therefore, the other end of the recovery line L0 may be connected to the hydrogen holder 1 on the upstream side of the first booster 2.

  Next, an example of an operation method in the hydrogen station 100 described above will be described with reference to FIG. In the following description, the operation from the start to the end of the hydrogen station 100 will be described as an example.

  FIG. 2 is a flowchart for explaining a method of operating the hydrogen station 100 of FIG. As shown in FIG. 2, in the hydrogen station 100, first, for example, before the start of work every morning, the filling hose 17 is filled with hydrogen and a pressure holding test is performed (S1).

  In S1, when the outlet pressure of the dispenser 11 is maintained for a predetermined time (here, when the decrease of the outlet pressure in 5 minutes is smaller than 0.1 MPa), the filling hose 17 is depressurized with hydrogen as no abnormality ( S2). On the other hand, in S1, when the outlet pressure of the dispenser 11 is not maintained for a predetermined time, it is assumed that there is an abnormality, hydrogen leakage is confirmed, the filling hose 17 is depressurized with hydrogen, necessary measures are taken, and an airtight test is performed (S3). ). Thereafter, the process returns to S1 and the holding pressure test is performed again.

  During work, hydrogen filling by the dispenser 11 and hydrogen depressurization after the hydrogen filling are repeated for the number of FCVs 30 that have arrived. That is, the filling nozzle 16 is connected to the incoming hydrogen filling port of the FCV 30 to start filling with hydrogen (S4). When the hydrogen filling rate in the FCV 30 becomes larger than a certain value (for example, 95%) and reaches a preset target filling pressure, the filling is stopped (S5). Then, the filling nozzle 16 is depressurized with hydrogen, and the filling nozzle 16 is removed from the FCV 30 (S6).

  At the time of hydrogen depressurization in S6, the shutoff valve 14 of the precooler 10 is "closed" and the automatic valve 22 is "opened", so that the system after the shutoff valve 14 at the outlet of the precooler 10 is provided in the recovery line L0. The hydrogen inside is circulated to the line L22 on the upstream side of the hydrogen holder 1 and recovered (hydrogen recovery step). As a result, the filling nozzle 16 is rapidly dehydrogenated. The hydrogen station 100 has a capacity capable of filling six FCVs 30 per hour.

  Prior to the end of work, pre-work equipment inspection is performed (S7). If there is no abnormality as a result of the equipment inspection before the end of work, the dispenser 11 is depressurized with hydrogen (S8). Then, the hydrogen station 100 is closed (S9).

  By the way, normally, with the depressurization of the filling nozzle 16 after filling the FCV 30 with hydrogen, it is necessary to release, for example, about 140 to 700 N liters of hydrogen per day. In a general hydrogen station, the hydrogen is released to the outside of the system as it is via a vent stack or the like (for example, it is released into the atmosphere above 5 m), so that an out-of-system release loss of hydrogen occurs due to the out-of-system release, Energy loss is large and a large amount of hydrogen is released into the atmosphere.

  On the other hand, in the present embodiment, as described above, when hydrogen is depressurized after the completion of hydrogen filling to the FCV 30, hydrogen in the system after the shutoff valve 14 at the outlet of the precooler 13 is not discharged out of the system. It can be recovered by returning it to the line L22 which is the lowest pressure part of the station 100. Therefore, it is possible to reduce the loss of hydrogen released from the system, reduce the energy loss, and suppress the release of a large amount of hydrogen into the atmosphere.

[Second Embodiment]
Next, a hydrogen station according to the second embodiment will be described. In the description here, differences from the first embodiment will be described, and overlapping descriptions will be omitted.

  FIG. 3 is a system configuration diagram showing a hydrogen station according to the second embodiment. FIG. 4 is a flowchart for explaining a method of operating the hydrogen station of FIG. As shown in FIG. 3, the hydrogen station 200 of this embodiment senses the pressure of the hydrogen holder 1 and controls the flow rate of hydrogen recovered in the recovery line L0 during hydrogen depressurization based on the pressure.

  The hydrogen station 200 is different from the hydrogen station 100 in that it includes a flow rate adjustment valve 23 instead of the automatic valve 22 (see FIG. 1), and further includes a pressure gauge 25 and a control unit 27. The flow rate control valve 23 is provided on the upstream side of the check valve 21 in the recovery line L0. The pressure gauge 25 detects the pressure of the hydrogen holder 1. The control unit 27 controls opening and closing of the flow rate adjusting valve 23 based on the pressure of the hydrogen holder 1 detected by the pressure gauge 25 (details will be described later).

  A vent line L4 is connected between the check valve 21 and the flow rate adjustment valve 23 in the recovery line L0. The vent line L4 discharges hydrogen to the outside (vent discharge) in order to remove the residual pressure in the system after hydrogen recovery by the recovery line L0. The vent line L4 is provided with a shut-off valve 28 and an orifice 29 from the upstream side.

  In the hydrogen station 200 of the present embodiment, the following processing is performed when the filling nozzle 16 is depressurized after completion of the hydrogen filling of the FCV 30 that has arrived. That is, as shown in FIG. 4, first, the shutoff valve 14 of the precooler 10 is closed (S11). Subsequently, the flow control valve 23 is operated by the control unit 27 to be “open”, whereby the hydrogen in the system after the shut-off valve 14 at the outlet of the precooler 10 is transferred to the upstream side of the hydrogen holder 1 by the recovery line L0. It is made to distribute | circulate to the line L22 and collect | recover. At this time, the control unit 27 monitors the pressure of the hydrogen holder 1 detected by the pressure gauge 25 and opens the flow rate adjustment valve 23 so that the pressure of the hydrogen holder 1 does not exceed the upper limit of pressure (here, 1 MPa). The flow rate of hydrogen to be recovered is controlled by adjusting the degree (S12).

  Subsequently, the control unit 27 determines whether or not the pressure of the hydrogen holder 1 is in an equilibrium state (S13). When the pressure of the hydrogen holder 1 is in an equilibrium state, the control unit 27 sets the flow rate adjustment valve 23 to “closed”, thereby stopping the recovery of hydrogen through the recovery line L0 (S14).

  Subsequently, after the hydrogen recovery by the recovery line L0, there may be a residual pressure of about 1 MPa (10 atm) in the system after the shut-off valve 14, the vent line shut-off valve 25 is set to “open”, Hydrogen in the system after the shutoff valve 14 is vented through the vent line L4 (S15). Subsequently, for example, after 10 seconds are counted by a timer (not shown), the shutoff valve 25 of the vent line is set to “closed”, and vent discharge is stopped (S16, S17). And it will be in a standby state until hydrogen filling to FCV30 which comes next.

  As described above, in the hydrogen station 200 and the operation method thereof according to the present embodiment, as in the above-described embodiment, the hydrogen release loss can be reduced, the energy loss can be reduced, and a large amount of hydrogen can be released into the atmosphere. The effect of suppressing is exhibited.

  In the present embodiment, the flow rate of hydrogen (depressurized gas) recovered by the recovery line L0 can be controlled by the flow rate control valve 23 so that the pressure of the hydrogen holder 1 does not exceed the pressure upper limit. Therefore, this embodiment is particularly effective when the flow rate of hydrogen to be recovered is large or when the capacity of the hydrogen holder 1 is small. Incidentally, when the flow rate of hydrogen to be recovered is not large, or when the hydrogen holder 1 has a sufficient capacity, this embodiment can be applied to the first embodiment as well as the first embodiment. is there.

[Third Embodiment]
Next, a hydrogen station according to the third embodiment will be described. In the description here, differences from the second embodiment will be described, and overlapping descriptions will be omitted.

  FIG. 5 is a system configuration diagram showing a hydrogen station according to the third embodiment. As shown in FIG. 5, the hydrogen station 300 of the present embodiment is different from the hydrogen station 200 (see FIG. 3) in that the precooler 10 includes a dispenser 51 incorporated therein.

  In the dispenser 51, on the upstream side of the precooler 10, a shutoff valve 52 that shuts off the flow of hydrogen, a flow rate adjustment valve 53 that adjusts the flow rate of hydrogen that flows, a flow meter 54 that measures the flow rate of hydrogen that flows, and a flow of hydrogen A shut-off valve 55 is provided in this order from the upstream side to the downstream side. The flow rate adjustment valve 53 can be opened and closed according to the hydrogen flow rate measured by the flow meter 54. In addition, the above-described recovery line L0 is connected to the downstream side of the shutoff valve 14 on the outlet side of the precooler 10 in the dispenser 51.

  The inlet side of the dispenser 51 is connected to the lines L10 to L12 via the line L53. An emergency release coupler 15, a filling hose 17 and a filling nozzle 16 are connected to the outlet side of the dispenser 51.

  As described above, in the hydrogen station 300 and the operation method thereof according to the present embodiment, similarly to the above-described embodiment, the hydrogen loss outside the system can be reduced, energy loss can be reduced, and a large amount of hydrogen can be released into the atmosphere. The effect of suppressing is exhibited.

[Fourth Embodiment]
Next, a hydrogen station according to the fourth embodiment will be described. In the description here, differences from the first embodiment will be described, and overlapping descriptions will be omitted.

  FIG. 6 is a system configuration diagram showing a hydrogen station according to the fourth embodiment. As shown in FIG. 6, the hydrogen station 400 of this embodiment differs from the said hydrogen station 100 (refer FIG. 1) by the point provided with the dispenser 61 in which the precooler 10 was integrated.

  The dispenser 61 is configured in the same manner as the dispenser 51 (see FIG. 5) in the third embodiment. That is, in the dispenser 61, on the upstream side of the precooler 10, a cutoff valve 52, a flow rate adjustment valve 53, a flow meter 54, and a cutoff valve 55 are provided in this order from the upstream side to the downstream side. The above-described recovery line L0 is connected to the downstream side of the shutoff valve 14 on the outlet side of the precooler 10 in the dispenser 61. The inlet side of the dispenser 61 is connected to the lines L <b> 10 to L <b> 12 via the line L <b> 53, while the emergency release coupler 15, the filling hose 17, and the filling nozzle 16 are connected to the outlet side of the dispenser 51.

  As described above, in the hydrogen station 400 and the operation method thereof according to the present embodiment, similarly to the above-described embodiment, the hydrogen release loss can be reduced, the energy loss can be reduced, and a large amount of hydrogen can be released into the atmosphere. The effect of suppressing is exhibited.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments. The present invention is modified without departing from the scope described in the claims or applied to others. It may be.

  For example, in the embodiment described above, various elements such as valves and sensors may be arranged on each line as necessary in addition to the configuration shown in FIG. The said embodiment is comprised by dividing into the front | former stage and a back | latter stage, and while being provided with the 1st pressure | voltage rise part 2 and the 2nd pressure | voltage rise part 4, the 1st pressure accumulation part 3 and the 2nd pressure accumulation part 6 are comprised. However, the configuration of the hydrogen station 100 is not particularly limited. For example, the hydrogen station 100 is not divided into a front stage and a rear stage, and includes one pressure boosting unit connected to the trailer T and / or the hydrogen production apparatus S, and one pressure accumulating unit connected to the pressure boosting unit. You may have. In the first and second embodiments, the dispenser 11 is disposed on the downstream side of the precooler 10, but the dispenser 11 may be disposed on the upstream side of the precooler 10.

  In the said embodiment, the 1st pressure | voltage rise part 2 respond | corresponds to the pressure | voltage rise part in a claim, and the 1st pressure accumulation part 3 respond | corresponds to the pressure accumulation part in a claim.

  DESCRIPTION OF SYMBOLS 1 ... Hydrogen holder, 2 ... 1st pressure | voltage rise part (pressure | voltage rise part), 3 ... 1st pressure accumulation part (pressure accumulation part), 10 ... Precooler, 14 ... Shut-off valve, 16 ... Filling nozzle, 30 ... FCV (filling object) , 100 ... hydrogen station, L0 ... recovery line, L14 ... line (hydrogen line), L21, L22, L23 ... line (hydrogen supply line).

Claims (2)

A booster for boosting hydrogen;
A hydrogen supply line provided with a hydrogen holder for supplying hydrogen to the boosting unit;
A pressure accumulating unit connected to the pressure increasing unit and storing hydrogen;
A precooler that is connected to the pressure accumulator and cools the hydrogen to be filled , and is provided downstream of a shutoff valve that shuts off the hydrogen flow ;
A filling nozzle connected to the precooler for filling the filling object with hydrogen,
Wherein the on hydrogen line between the shut-off valve at the outlet side to said filling nozzle in the precooler, is the flow rate control valve is provided, and the hydrogen after hydrogen charging completion to the filling target, the hydrogen in the hydrogen supply line A recovery line is connected to the upstream side of the holder to recover the hydrogen holder by adjusting the valve opening of the flow rate control valve so that the pressure does not exceed the upper limit of pressure ,
The recovery line, the hydrogen in the system after the shut-off valve at the outlet side is recovered in the precooler,
Connected to the recovery line is a vent line for venting and releasing hydrogen after recovering hydrogen when the pressure of the hydrogen holder is in an equilibrium state by the recovery line,
A hydrogen station that vents and discharges hydrogen from the vent line for a predetermined time after recovering hydrogen when the pressure of the hydrogen holder is in an equilibrium state by the recovery line . A booster for boosting hydrogen;
A hydrogen supply line provided with a hydrogen holder for supplying hydrogen to the boosting unit;
A pressure accumulating unit connected to the pressure increasing unit and storing hydrogen;
A precooler that is connected to the pressure accumulator and cools the hydrogen to be filled , and is provided downstream of a shutoff valve that shuts off the hydrogen flow ;
A hydrogen nozzle connected to the precooler and having a filling nozzle for filling the filling object with hydrogen,
A hydrogen recovery step of recovering hydrogen to the hydrogen supply line from the hydrogen line between the shut-off valve on the outlet side of the precooler and the filling nozzle after completion of hydrogen filling to the filling object;
In the hydrogen recovery step, the hydrogen in the system after the shut-off valve on the outlet side in the precooler is recovered ,
In the hydrogen recovery step, hydrogen is supplied to the upstream side of the hydrogen holder in the hydrogen supply line via a recovery line provided with a flow rate control valve so that the pressure of the hydrogen holder does not exceed the upper pressure limit. Adjust and collect the valve opening of the control valve,
A method of operating a hydrogen station, wherein hydrogen is vented for a predetermined time from a vent line connected to the recovery line after recovering hydrogen in which the pressure of the hydrogen holder is in an equilibrium state by the hydrogen recovery step .

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