JP4808937B2 - Fuel cell system, fuel cell system control method and building with improved safety in emergency - Google Patents

Description

  The present invention relates to a fuel cell system, a fuel cell system control method, and a building that improve safety in an emergency. In particular, the present invention relates to a fuel cell system, a fuel cell system control method, and a building that releases hydrogen remaining therein in an emergency.

  In a distributed power source using a fuel cell, a fuel reforming type fuel cell system is known. A fuel reforming fuel cell system includes a reformer that generates hydrogen by reforming city gas, propane gas, or the like, and supplies the hydrogen generated by the reformer to the fuel cell (for example, Patent Document 1). reference.).

In such a system, hydrogen generated by the reformer is supplied to the fuel cell via a pipe. Further, exhaust gas containing hydrogen discharged from the fuel cell is supplied to the reformer via a pipe and burned in the reformer.
Japanese Patent No. 2972261

  In the conventional system, when the fuel cell is brought to an emergency stop, hydrogen remains in a pipe for supplying hydrogen from the reformer to the fuel cell. For this reason, when the reformer is stopped, if air flows from the reformer that is open to the atmosphere into the piping that supplies the exhaust gas of the fuel cell to the reformer, there is a risk that it will react with hydrogen and explode. It was.

  In addition, in a system in which the remaining hydrogen gas is burned by the reformer when the operation of the fuel cell is stopped, the hydrogen gas cannot be burned by the reformer if the reformer is damaged in an emergency such as an earthquake. There is. Thus, when a system failure or the like occurs, it is difficult to continuously consume hydrogen gas without performing complicated control.

  Therefore, when the fuel cell is used as a residential power source, it is desirable to safely discharge hydrogen gas to the outside without performing complicated control in an emergency such as an earthquake.

  In order to solve such a problem, the fuel cell system according to the first embodiment of the present invention includes a reformer that generates hydrogen, a plurality of fuel cells that generate electric power using the hydrogen generated by the reformer, A pipe for supplying hydrogen from the reformer to the plurality of fuel cells and a hydrogen discharge section for releasing hydrogen remaining in the pipe in an emergency are provided. For this reason, the safety in an emergency improves.

  The fuel cell is provided on each of a plurality of floors of the building. The hydrogen releasing part is provided at a position higher than any of the plurality of floors. For this reason, hydrogen inside the piping of any floor can be released without using power for releasing hydrogen. Furthermore, it is possible to prevent the released hydrogen from entering the building. In addition, even when the hydrogen releasing portion burns, damage to each floor due to combustion of the hydrogen releasing portion can be reduced.

  The fuel cell system according to the present embodiment further includes a seismic intensity detector that detects the seismic intensity of the building, and a control unit that releases hydrogen using the hydrogen releasing unit when the seismic intensity detector detects a seismic intensity greater than or equal to a predetermined level. It was. For this reason, even when the fuel cell stops due to the shaking of the building and the fuel cell does not consume hydrogen inside the pipe, it is possible to prevent hydrogen from remaining inside the pipe.

  Moreover, the seismic intensity detector is provided in each of several floors. A control part discharge | releases hydrogen using a hydrogen discharge | release part, when one of the seismic intensity detectors detects the seismic intensity more than predetermined. For this reason, even when the fuel cell on any floor stops due to the shaking of the building and the hydrogen in the piping is not consumed, it is possible to prevent hydrogen from remaining in the piping.

  A fuel cell system control method according to another aspect of the present invention includes a step of generating hydrogen using a reformer, a step of supplying hydrogen from a reformer to a plurality of fuel cells using piping, and a fuel cell. And a step of generating electric power with hydrogen generated by the reformer, and a step of discharging hydrogen remaining in the pipe using a hydrogen discharge portion in an emergency.

  A building according to another embodiment of the present invention includes a building having a plurality of floors, a reformer that generates hydrogen, a plurality of fuel cells that generate electric power using hydrogen generated by the reformer, and a plurality of reformers. A hydrogen supply section for supplying hydrogen to the fuel cell and a hydrogen discharge section for releasing hydrogen remaining in the pipe in an emergency, and the hydrogen discharge section is provided at a position higher than any of the plurality of floors. Yes.

  Moreover, the fuel cell is provided on each of a plurality of floors of the building.

  The building in this embodiment further includes a seismic intensity detector that detects the seismic intensity of the building, and a control unit that releases hydrogen using the hydrogen releasing unit when the seismic intensity detector detects a seismic intensity equal to or higher than a predetermined level. Seismic intensity detectors are provided on each of a plurality of floors. A control part discharge | releases hydrogen using a hydrogen discharge | release part, when one of the seismic intensity detectors detects the seismic intensity more than predetermined.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  According to the present invention, the hydrogen releasing part releases the hydrogen remaining in the pipe in an emergency. For this reason, the safety in an emergency improves.

  The present invention will be described below through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the development means of the invention.

  FIG. 1 is a diagram illustrating an example of a configuration of a building 52 including a fuel cell system 30 according to an embodiment of the present invention. An object of the present embodiment is to provide a fuel cell system that improves safety in an emergency.

  The fuel cell system 30 supplies power to a building 52 having, for example, a plurality of floors (10a to 10c, hereinafter collectively referred to as 10). In the building 52, the floor 10a is the lowest floor and 10c is the top floor. The fuel cell system 30 includes a plurality of fuel cell subsystems 32 included in each floor 10 of the building 52. The fuel cell system 30 further includes an external pipe 45, a fan 64, a hydrogen release unit 46, a control unit 50, and a plurality of flow rate control valves 62.

  Each fuel cell subsystem 32 of each floor 10 of the building 52 includes a reformer 40, a plurality of fuel cells 42, a plurality of loads 54, a pipe 44 connecting each of the fuel cells 42 and the reformer 40, and A seismic intensity detector 48 is provided.

  The reformer 40 produces hydrogen. For example, the reformer 40 generates hydrogen by reforming city gas, propane gas, or the like. The hydrogen generated by the reformer 40 is supplied to the fuel cell 42 via the pipe 44. The fuel cell 42 generates electric power using the hydrogen generated by the reformer 40 and supplies the electric power to loads 54 connected to each of the fuel cells 42. The fuel cell 42 is, for example, a polymer electrolyte fuel cell (PEFC). For example, the fuel cell 42 and the load 54 are provided for each room of the building 52, and each load 54 consumes electric power supplied from the fuel cell 42 provided in the room including the load 54.

  The seismic intensity detector 48 detects the seismic intensity at the floor 10 where each seismic intensity detector 48 is provided. As a result, even if an earthquake or the like causes a shake that has a different seismic intensity depending on the floor 10 of the building 52, the seismic intensity can be appropriately determined.

  The pipes 44 included in the respective fuel cell subsystems 32 are connected to each other by an external pipe 45 outside the fuel cell subsystem 32. Therefore, the hydrogen generated by the reformer 40 can be supplied to the fuel cell 42 included in the fuel cell subsystem 32 provided on any floor 10. The flow control valve 62 is provided in the external pipe 45 and controls the connection and disconnection of the pipes 44 included in each of the fuel cell subsystems 32 on each floor 10.

  The hydrogen release unit 46 is connected to the external pipe 45 and discharges hydrogen remaining in the pipe 44 in an emergency. Further, the hydrogen releasing part 46 is provided at a position higher than any of the plurality of floors 10. The hydrogen releasing unit 46 releases the hydrogen inside the pipe 44 to the outside of the building 52 by opening the upper part to the outside of the building 52, for example.

  The control unit 50 controls the reformer 40, the fuel cell 42, the hydrogen release unit 46, the flow control valve 62, and the fan 64 based on the seismic intensity detected by the seismic intensity detector 48 included in each fuel cell subsystem 32. To do. For example, when the seismic intensity detector 48 detects a seismic intensity greater than or equal to a predetermined level, the control unit 50 controls the flow control valve 62 so that the reformer 40 and the fuel cell 42 are coupled to the hydrogen release unit 46 through the fluid passage. Then, hydrogen inside the pipe 44 is released using the hydrogen releasing portion 46. At this time, the control unit 50 stops the reformer 40 and operates the fuel cell 42 to consume hydrogen in the pipe 44. In some cases, the control unit 50 may operate the fan 64 to increase the amount of hydrogen discharged from the hydrogen release unit 46 per hour.

  Further, the controller 50 selects the fuel cell subsystem 32 on the floor 10 where hydrogen needs to be released in an emergency, and the reformer 40 and the fuel cell 42 included in the fuel cell subsystem 32 are connected to the hydrogen release unit. The flow control valve 62 may be controlled to be coupled to the fluid passage 46. In addition, when the reformer 40 abnormally stops, the control unit 50 may cause the hydrogen inside the pipe 44 of the fuel cell system 30 having the reformer 40 to be released using the hydrogen release unit 46. .

  According to the building 52 provided with the fuel cell system 30 in the present embodiment, the hydrogen release part 46 releases the hydrogen remaining in the pipe 44 in an emergency, so the safety in an emergency is improved. In addition, since the hydrogen release portion 46 is provided at a position higher than any of the plurality of floors 10, the hydrogen inside the pipes 44 of any floor 10 can be removed without using power for releasing hydrogen. Can also be released. Further, the released hydrogen can be prevented from entering the building 52. Further, even when the hydrogen releasing part 46 burns, damage to each floor 10 due to combustion of the hydrogen releasing part 46 can be reduced.

  In addition, since the seismic intensity detector 48 is provided on each of the plurality of floors 10, the seismic intensity can be appropriately determined even when the seismic intensity varies depending on the floor 10 of the building 52. Further, when the seismic intensity detector 48 detects a seismic intensity greater than or equal to a predetermined value, the control unit 50 releases hydrogen using the hydrogen releasing unit 46, so that the fuel cell 42 stops due to the shaking of the building 52, and the fuel cell Even when 42 does not consume hydrogen in the pipe 44, it is possible to prevent hydrogen from remaining in the pipe 44. In addition, since the fuel cell 42 is provided on each of the plurality of floors 10 of the building 52, even if the fuel cell 42 on any one of the floors 10 stops supplying power in an emergency, another floor 10 The ten fuel cells 42 can supply power to the load 54.

  FIG. 2 is a diagram illustrating an example of a flowchart showing details of the operation of the control unit 50. The control unit 50 determines whether or not the seismic intensity detected by the plurality of seismic intensity detectors 48 exceeds a predetermined reference seismic intensity (S302).

  In S302, if any seismic intensity detected by any seismic intensity detector 48 does not exceed a predetermined reference seismic intensity, the determination in S302 is repeated.

  In S302, when the seismic intensity detected by any seismic intensity detector 48 exceeds a predetermined reference seismic intensity, the control unit 50 stops the operation of the reformer 40 (S304), and the hydrogen releasing unit 46 is opened (S306). Further, the control unit 50 controls the flow rate control valve 62 so that the reformer 40 and the fuel cell 42 are coupled to the hydrogen release unit 46 through a fluid passage (S308).

  Further, the control unit 50 determines whether or not hydrogen inside the pipe 44 has been released (S310). In S310, the control unit 50 may determine whether or not hydrogen inside the pipe 44 has been released based on the hydrogen concentrations inside the pipe 44 and the external pipe 45. In this case, the control unit 50 releases the hydrogen inside the pipe 44 based on the hydrogen concentration at least in the vicinity of the hydrogen release unit 46, the flow control valve 62, the reformer 40, and the fuel cell 42. It is desirable to determine whether or not it has been done.

  If it is determined in S310 that the hydrogen inside the pipe 44 has been released, the hydrogen release unit 46 is closed (S312), and the process is terminated. If it is determined in S310 that the hydrogen inside the pipe 44 has not been released, the process proceeds to S310, and the determination in S310 is repeated until hydrogen inside the pipe 44 is released.

  When the seismic intensity is determined in S302, the control unit 50 is given a reference seismic intensity corresponding to each seismic intensity detector 48 in advance, and the seismic intensity detected by each seismic intensity detector 48 is greater than the corresponding standard seismic intensity. In addition, the process may be advanced to S304.

  Further, when the control unit 50 stops the reformer 40 in S304, the reformer 40 of the fuel cell subsystem 32 included in the floor 10 or higher where the seismic intensity detector 48 that detects the seismic intensity exceeding the reference seismic intensity is installed. You may control to stop. In this case, in S308, the control unit 50 controls the flow control valve 62 so that the reformer 40 and the fuel cell 42 of the fuel cell subsystem 32 are coupled to the hydrogen release unit 46 through a fluid passage.

  In S304, the control unit 50 operates the fuel cell 42 to which hydrogen is supplied from the reformer 40 that has stopped operating for a predetermined period of time after the reformer 40 stops operating, and performs the reforming. Hydrogen remaining in the pipe 44 between the container 40 and the fuel cell 42 may be consumed. For this purpose, the control unit 50 supplies the amount of hydrogen generated by the reformer 40 to each reformer 40 after the reformer 40 starts supplying hydrogen until the hydrogen supply is stopped. Furthermore, the amount of hydrogen consumed by the fuel cell 42 is managed in association with the fuel cell 42 after the reformer 40 starts supplying hydrogen and stops supplying hydrogen. To do. Then, when the reformer 40 stops supplying hydrogen, the control unit 50 calculates the amount of hydrogen remaining in the pipe 44 and uses the hydrogen remaining in the pipe 44 as a fuel cell. The fuel cell 42 may be operated for a period required for the consumption of 42. The fuel cell 42 preferably discharges the excessively generated power at this time, for example, to the ground potential.

  In addition, when there is a fuel cell 42 that has not stopped power generation, the control unit 50 preferably causes the fuel cell 42 that stopped power generation to supply power to a load 54 to which power is to be supplied. For example, during normal times, each fuel cell 42 supplies power to a load 54 included in a room including the fuel cell 42. When one of the fuel cells 42 is stopped in an emergency, the control unit 50 connects the fuel cell 42 that has not been stopped to the load 54, and the load 54 to which power is to be supplied from the fuel cell 42 that has not been stopped. Supply power.

  In addition, priorities are set in advance for the plurality of loads 54, and when the power generation of any one of the fuel cells 42 is stopped, the control unit 50 generates the total generated power of the fuel cells 42 that have not stopped power generation. Based on the priority of the load 54, the load 54 to which power is to be supplied may be selected and supplied.

  Further, the control unit 50 may control whether to connect to the fuel cell 42 that is not stopped based on the priority of each load 54 for each fuel cell subsystem 32. For example, even when one of the fuel cells 42 is stopped at the time of an earthquake, the control unit 50 distributes predetermined power to each fuel cell subsystem 32, and the priority of each fuel cell subsystem 32 is determined. The high load 54 is connected to the fuel cell 42 that is not stopped.

  With the operation described above, the control unit 50 releases hydrogen using the hydrogen release unit 46 when any seismic intensity detector 48 detects a seismic intensity greater than or equal to a predetermined level. Even when the fuel cell 42 of the floor 10 stops and the hydrogen inside the pipe 44 is not consumed, it is possible to prevent hydrogen from remaining inside the pipe 44.

  In this embodiment, the reformer 40 is installed on each floor 10 of the building 52. However, as another method, the reformer 40 is provided in the building 52 and the reformer 40 is provided in the external pipe 45. May be connected to supply all the fuel cells 42 with hydrogen. In this case, it is desirable to install the reformer 40 on the lowest floor 10a of the building 52. In an emergency, the reformer 40 is stopped and the flow rate control valve 62 is controlled to release the hydrogen in the pipe 44 from the hydrogen release unit 46. In an emergency, when hydrogen is supplied only to the fuel cell 42 of the fuel cell subsystem 32 of the floor 10 below the certain floor 10, the operation of the reformer 40 is continued, and the fuel cell subsystem 32 The flow control valve 62 is controlled to supply hydrogen to the fuel cell 42. Further, the fuel cell 42 other than the fuel cell subsystem 32 controls the flow rate control valve 62 so as to be coupled to the hydrogen release portion 46 through the fluid passage, and releases hydrogen from the hydrogen release portion 46.

  FIG. 3 is a diagram illustrating an example of the configuration of the computer 500 included in the control unit 50. In this example, the computer 500 stores a program that causes the fuel cell system to function as the fuel cell system 30 described in FIGS. 1 and 2.

  The computer 500 includes a CPU 700, a ROM 702, a RAM 704, a communication interface 706, a hard disk drive 710, a flexible disk drive 712, and a CD-ROM drive 714. The CPU 700 operates based on programs stored in the ROM 702, the RAM 704, the hard disk drive 710, the flexible disk 720, and / or the CD-ROM 722.

  For example, the program that causes the fuel cell system 30 to function causes the computer 500 to function as the control unit 50 described with reference to FIGS. 1 and 2 to cause the fuel cell system to function.

  The communication interface 706 communicates with, for example, the reformer 40, the fuel cell 42, the seismic intensity detector 48, the hydrogen release unit 46, the flow control valve 62, and the fan 64, receives information regarding the respective states, etc. A control signal to be controlled is transmitted. The hard disk drive 710, the ROM 702, or the RAM 704 as an example of a storage device stores setting information, a program for operating the CPU 700, and the like. The program may be stored in a recording medium such as the flexible disk 720 and the CD-ROM 722.

  When the flexible disk 720 stores a program, the flexible disk drive 712 reads the program from the flexible disk 720 and provides it to the CPU 700. When the CD-ROM 722 stores a program, the CD-ROM drive 714 reads the program from the CD-ROM 722 and provides it to the CPU 700.

  Further, the program may be read directly from the recording medium into the RAM and executed, or once installed in the hard disk drive 710, the program may be read into the RAM 704 and executed. Further, the program may be stored in a single recording medium or a plurality of recording media. The program stored in the recording medium may provide each function in cooperation with the operating system. For example, the program may request the operating system to perform a part or all of the function and provide the function based on a response from the operating system.

  As a recording medium for storing a program, in addition to a flexible disk and a CD-ROM, an optical recording medium such as a DVD and a PD, a magneto-optical recording medium such as an MD, a tape medium, a magnetic recording medium, an IC card, a miniature card, etc. A semiconductor memory or the like can be used. A storage device such as a hard disk or a RAM provided in a server system connected to a dedicated communication network or the Internet may be used as a recording medium.

  As is clear from the above description, according to the present embodiment, the hydrogen releasing part 46 releases the hydrogen remaining in the pipe 44 in an emergency, so that the safety in an emergency is improved.

  In addition, since the hydrogen release portion 46 is provided at a position higher than any of the plurality of floors 10, the hydrogen inside the pipe 44 of any floor 10 can be stored without using power for releasing hydrogen. Can be released. Further, the released hydrogen can be prevented from entering the building 52. Further, even when the hydrogen releasing part 46 burns, damage to each floor 10 due to combustion of the hydrogen releasing part 46 can be reduced.

  When the seismic intensity detector 48 detects a seismic intensity greater than or equal to a predetermined level, the control unit 50 releases hydrogen using the hydrogen releasing unit 46. Therefore, the fuel cell 42 stops due to the shaking of the building 52, and the fuel cell 42 Even when the hydrogen inside the pipe 44 is not consumed, it is possible to prevent hydrogen from remaining inside the pipe 44.

  Since the seismic intensity detector 48 is provided on each of the plurality of floors 10, the seismic intensity can be appropriately determined even when a shaking whose seismic intensity differs depending on the floor 10 of the building 52 occurs. In addition, when any seismic intensity detector 48 detects a seismic intensity equal to or higher than a predetermined level, the control unit 50 releases hydrogen using the hydrogen releasing unit 46, so that the fuel cell of any floor 10 is caused by the shaking of the building 52. Even when 42 stops and the hydrogen in the pipe 44 is not consumed, it is possible to prevent hydrogen from remaining in the pipe 44.

  In addition, since the fuel cell 42 is provided on each of the plurality of floors 10 of the building 52, even if the fuel cell 42 on any one of the floors 10 stops supplying power in an emergency, another floor 10 The fuel cell 42 can supply power.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements are also included in the technical scope of the present invention.

An example of the structure of the building 52 provided with the fuel cell system 30 which concerns on embodiment of this invention is shown. An example of the flowchart which shows the detail of operation | movement of the control part 50 is shown. An example of a configuration of a computer 500 included in the control unit 50 is shown.

Explanation of symbols

  10 ... Floor, 30 ... Fuel cell system, 32 ... Fuel cell subsystem, 40 ... Reformer, 42 ... Fuel cell, 44 ... Piping, 45 ... External piping , 46 ... Hydrogen release part, 48 ... Seismic intensity detector, 50 ... Control part, 52 ... Building, 54 ... Load, 62 ... Flow control valve, 64 ... Fan, 500 ... Computer, 700 ... CPU, 702 ... ROM, 704 ... RAM, 706 ... Communication interface, 710 ... Hard disk drive, 712 ... Flexible disk drive, 714 ... CD-ROM drive, 720 ... flexible disk, 722 ... CD-ROM

Claims (11)

A reformer that produces hydrogen;
A plurality of fuel cells , each of which is provided on each of a plurality of floors of a building ;
A pipe for supplying hydrogen to the plurality of fuel cells from the reformer,
A hydrogen release portion provided at a position higher than any of the plurality of floors ;
A control unit that discharges hydrogen remaining inside the pipe to the outside of the building using the hydrogen discharge unit ;
The piping is
A plurality of first pipes that are provided on each of the plurality of floors and connect each of the plurality of fuel cells provided on the respective floors to supply hydrogen;
A second pipe interconnecting the plurality of first pipes;
A plurality of flow control valves provided in the second pipe corresponding to the plurality of floors, respectively, for controlling connection and disconnection of the plurality of first pipes;
Have
The hydrogen release part is connected to a position higher than any of the plurality of floors of the second pipe,
The control unit controls the plurality of flow rate control valves so that hydrogen in the first pipe provided on the floor where the hydrogen needs to be discharged among the plurality of first pipes is transferred to the hydrogen release unit. A fuel cell system that discharges to the outside of the building . Seismic intensity detector for detecting seismic intensity of the building
Further comprising
Wherein, when the seismic intensity detector detects a seismic intensity of more than a predetermined, from the plurality of flow control valve wherein the hydrogen release unit controls the according to claim 1, releasing hydrogen outside the building Fuel cell system.   The seismic intensity detector is provided on each of the plurality of floors,
  The control unit is configured so that the plurality of fuel cells provided on the floor above the floor on which the seismic intensity detector that detects the seismic intensity equal to or higher than the predetermined level is coupled to the hydrogen discharge unit through a fluid passage. Control the flow control valve
The fuel cell system according to claim 2.   The reformer is provided on each of the plurality of floors,
  The plurality of first pipes connect the plurality of fuel cells provided on each floor and the reformer,
  The control unit stops the operation of the reformer provided on the floor above the floor provided with the seismic intensity detector that has detected the seismic intensity greater than or equal to the predetermined level.
The fuel cell system according to claim 3.   The reformer is provided on each of the plurality of floors,
  The plurality of first pipes connect the plurality of fuel cells provided on each floor and the reformer.
The fuel cell system according to any one of claims 1 to 3.   The reformer is provided on the lowest floor of the building,
  The control unit is configured to supply the hydrogen generated by the reformer to the plurality of fuel cells provided on a floor below the floor provided with the seismic intensity detector that detects the seismic intensity equal to or greater than the predetermined value. Controlling the plurality of flow control valves to supply through
The fuel cell system according to claim 3. The seismic intensity detector is provided on each of the plurality of floors,
Wherein the control unit, according to claim 2 one of the seismic detector which releases hydrogen when it detects a predetermined or more seismic intensity, from the hydrogen release unit controls the plurality of flow control valves to the outside of the building The fuel cell system described in 1.   A building having a plurality of floors,
  The fuel cell system according to any one of claims 1 to 7.
Building with. Generating hydrogen using a reformer;
Supplying hydrogen from the reformer to a plurality of fuel cells provided on each of a plurality of floors of a building using piping;
Using the plurality of fuel cells to generate electric power from hydrogen generated by the reformer;
A control step of releasing hydrogen remaining in the pipe to the outside of the building using a hydrogen discharge portion provided at a position higher than any of the plurality of floors ;
The piping is
A plurality of first pipes that are provided on each of the plurality of floors and connect each of the plurality of fuel cells provided on the respective floors to supply hydrogen;
A second pipe interconnecting the plurality of first pipes;
A plurality of flow control valves provided in the second pipe corresponding to the plurality of floors, respectively, for controlling connection and disconnection of the plurality of first pipes;
Have
The hydrogen release part is connected to a position higher than any of the plurality of floors of the second pipe,
In the control step, by controlling the plurality of flow rate control valves, the hydrogen inside the first pipe provided on the floor where the hydrogen needs to be released among the plurality of first pipes is transferred to the hydrogen release unit. A fuel cell system control method for discharging from a building to the outside of the building . Detecting the seismic intensity of the building with a seismic intensity detector
Further comprising
The control step controls the plurality of flow rate control valves to release hydrogen from the hydrogen discharge portion to the outside of the building when the seismic intensity detector detects a seismic intensity equal to or higher than a predetermined level. 10. The fuel cell system control method according to 9 . The seismic detector is provided to each of the plurality of floors,
In the control step, the plurality of fuel cells provided on floors higher than the floor provided with the seismic intensity detector that detects the seismic intensity greater than or equal to the predetermined value are coupled to the hydrogen discharge portion through a fluid passage. The fuel cell system control method according to claim 10 , wherein the flow rate control valve is controlled .

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