JP2005259586A - Fuel cell system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stabilize supply of reform water without stopping a system even in the case supply malfunction of the reform water occurs. <P>SOLUTION: The fuel cell system is provided with a stack 1 that is supplied with a reformed gas and an oxidizer gas to generate electricity, a reformer 2 that is supplied with the raw material gas and a reform water to generate a reformed gas, a water pump 11 that force-feeds the reform water to the reformer 2 through the reform water line 5, a flow rate sensor 13 that detects a malfunction of the reform water supply in the reform water line 5, and a controller 20 that makes to increase the power output of the water pump 11 temporarily in the case when the supply malfunction of the reform water is detected. As the power output of the water pump 11 is temporarily increased when the supply malfunction of the reform water is detected, the force-feeding power of the reform water is temporarily increased, and the mixed air or mixed foreign materials in the reform water line 5 are extruded. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fuel cell system including a reformer that generates reformed gas supplied to a fuel cell by receiving supply of raw material gas and reformed water.

  Conventionally, there is a fuel cell system including a reformer for generating reformed gas supplied to the fuel cell. A reformer produces | generates the reformed gas which has hydrogen as a main component by using a hydrocarbon fuel and reformed water as a raw material. In this fuel cell system, it is an important condition to stably supply reforming water to the reformer. Here, if air is mixed into the piping for supplying reforming water to the reformer, or if foreign matter such as dust is mixed in, the fuel cell will continue to generate power. May become difficult, or various parts of the reformer may become abnormally hot, leading to a situation where the operation of the fuel cell system must be stopped. If the reforming water is not stably supplied to the reformer, the reformer will not be able to generate enough hydrogen for power generation in the fuel cell due to the shortage of reforming water used as a raw material, and the catalyst used in the reaction will deteriorate. There is a risk of causing. Further, if the supply of reforming water to the reformer is stopped, eventually the reformer will not be able to generate hydrogen, and power generation in the fuel cell cannot be continued. Furthermore, heat exchange inside the reformer is not performed as designed, temperature balance cannot be maintained, and various portions of the reformer become hot. For this reason, when the reformer rises beyond the heat resistance temperature, the reformer may be mechanically damaged.

  Here, Patent Document 1 below describes that it is important to keep the reforming water supply flow rate to the reformer stable in order to sufficiently bring out the fuel cell performance in the fuel cell generator. In order to keep the reforming water supply flow rate to the reformer stable, this fuel cell generator is provided with a throttle mechanism in the middle of a pipe for transferring the reforming water discharged from the water pump to the reformer. It is done.

JP 2003-132920 A (page 2-3, FIG. 1)

  However, in the fuel cell generator described in Patent Document 1 described above, there is a problem of instability of the reforming water supply flow rate caused by the pressure difference fluctuation between the water introduction part of the reformer and the outlet part of the water pump. It is only becoming. For this reason, nothing is described about a countermeasure for a temporary supply failure of the reforming water, for example, a case where the supply is stopped due to air or foreign matter mixed in the pipe. And when air and foreign matter are mixed in the piping and the supply of reforming water is stopped, it is generally difficult to continue the operation of the fuel cell system. It was necessary to restart the system after confirming the cause of the difficulty in continuing operation and taking necessary measures.

  In particular, a stationary fuel cell system that supplies a relatively small amount of reformed water is a low-pressure system. Therefore, when air enters a pipe including a water purifier, the supply device is operated at a desired output. However, the reforming water may not be sent to the reformer. On the other hand, in the case of a high-pressure system, it may be possible to forcibly feed air mixed in the reforming water piping with a supply device. However, there was no effective solution in the low pressure system.

  The present invention has been made in view of the above circumstances, and an object thereof is to stabilize the supply of reforming water without stopping the system even when a failure occurs in the supply of reforming water. An object of the present invention is to provide a fuel cell system.

  In order to achieve the above object, the invention described in claim 1 is directed to a fuel cell that generates power upon receiving a reformed gas containing hydrogen and an oxidant gas containing oxygen, and a feed of raw material gas and reformed water. In the fuel cell system including the reformer that generates the reformed gas upon receiving the pressure and the pressure feeding means for feeding the reformed water to the reformer through the pipe, the supply failure of the reformed water in the pipe is detected. It is intended to include a supply failure detection means for controlling and a control means for temporarily increasing the output of the pumping means when a supply failure is detected.

  According to the configuration of the invention, the reformer receives the supply of the reforming water and the raw material gas that are pumped through the pipe by the pumping means, and generates the reformed gas. The generated reformed gas is supplied to the fuel cell. The fuel cell generates power upon receiving the supply of the reformed gas and the oxidant gas. Here, when the supply failure of the reforming water is detected by the supply failure detection means in the pipe through which the reforming water flows, the control means temporarily increases the output of the pressure feeding means. As a result, the pumping force of the reforming water temporarily increases, and mixed air and mixed foreign matters in the piping that cause supply failure are pushed out.

  In order to achieve the above object, a second aspect of the present invention is directed to a fuel cell that generates power upon receiving a reformed gas containing hydrogen and an oxidant gas containing oxygen, and a supply of raw material gas and reformed water. In the fuel cell system including the reformer that generates the reformed gas upon receiving the pressure and the pressure feeding means for feeding the reformed water to the reformer through the pipe, the supply failure of the reformed water in the pipe is detected. Supply failure detection means for opening and closing, opening and closing means for opening and closing the piping, and control means for temporarily closing the opening and closing means from the open state while operating the pressure feeding means when a supply failure is detected The purpose.

  According to the configuration of the above invention, unlike the invention according to claim 1, when the supply failure detection means detects the supply failure of the reforming water in the piping through which the reforming water flows, the control means activates the pressure feeding means. The opening / closing means is temporarily closed. As a result, the supply pressure of the reforming water temporarily rises before and after the opening / closing means closes and opens, and the mixed air and mixed foreign matter in the pipe causing the supply failure are pushed out at once.

  In order to achieve the above object, a third aspect of the present invention provides a fuel cell that generates power by receiving a reformed gas containing hydrogen and an oxidant gas containing oxygen, and a supply of raw material gas and reformed water. In the fuel cell system including the reformer that generates the reformed gas upon receiving the pressure and the pressure feeding means for feeding the reformed water to the reformer through the pipe, the supply failure of the reformed water in the pipe is detected. Supply failure detecting means for opening and closing, opening and closing means for opening and closing the pipe, first control means for temporarily increasing the output of the pressure feeding means when a supply failure is detected, and output of the pressure feeding means temporarily It is intended to include a second control means for temporarily closing the opening / closing means from the open state while operating the pressure feeding means when a supply failure is detected even after the increase.

  According to the configuration of the above invention, unlike the invention according to claim 1 or 2, when the supply failure detecting means detects the supply failure of the reforming water in the piping through which the reforming water flows, the control means is the pumping means. Temporarily increase the output of. As a result, the pumping force of the reforming water temporarily increases, and mixed air and mixed foreign matters in the piping that cause supply failure are pushed out. If the supply failure of the reforming water is still detected, the control means temporarily closes the opening / closing means while operating the pressure feeding means. As a result, the pressure of the reforming water temporarily rises before and after the opening / closing means closes and opens, and the mixed air and mixed foreign matter in the piping causing the supply failure are pushed out at once.

  In order to achieve the above object, a fourth aspect of the present invention provides a fuel cell that generates power by receiving a reformed gas containing hydrogen and an oxidant gas containing oxygen, and a supply of raw material gas and reformed water. In the fuel cell system including the reformer that generates the reformed gas upon receiving the pressure and the pressure feeding means for feeding the reformed water to the reformer through the pipe, the supply failure of the reformed water in the pipe is detected. Supply failure detecting means for opening and closing, opening and closing means for opening and closing the piping, and control means for temporarily increasing the output of the pressure feeding means and temporarily closing the opening and closing means from the open state when a supply failure is detected This is intended to be provided.

  According to the configuration of the above invention, unlike the inventions according to claims 1 to 3, when the supply failure detecting means detects the supply failure of the reforming water in the piping through which the reforming water flows, the control means is the pressure feeding means. Is temporarily increased and the opening / closing means is temporarily closed from the open state. As a result, the pumping force of the reforming water temporarily increases, and the supply pressure of the reforming water temporarily rises before and after the opening / closing means closes and opens, and the mixed air in the piping causing the supply failure Or foreign materials are pushed out at once.

  According to the first to fourth aspects of the present invention, even when a failure occurs in the reforming water supply, the failure can be solved without stopping the fuel cell system, and the reforming water supply is stabilized. be able to.

[First Embodiment]
Hereinafter, a first embodiment of the fuel cell system according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a schematic configuration diagram of a fuel cell system. This fuel cell system includes a fuel cell (stack) 1, a reformed gas line 3 for supplying a reformed gas containing hydrogen from a reformer 2 to the stack 1, and an oxidant gas (cathode) containing oxygen in the stack 1. A cathode air line 4 for supplying air), a reforming water line 5 for supplying reforming water to the reformer 2, and a source gas line 6 for supplying reforming raw material (raw material gas) to the reformer 2. Prepare. The cathode air that has passed through the stack 1 is discharged as exhaust. The reformed gas line 3 branches into a first reformed gas line 3 a that passes through the stack 1 and a second reformed gas line 3 b that does not pass through the stack 1.

  The stack 1 includes a polymer electrolyte membrane that selectively transports hydrogen ions, and an anode and a cathode that are a pair of electrodes provided on both surfaces of the electrolyte membrane. The stack 1 is supplied with the reformed gas and the cathode air, and generates and generates heat by causing these gases to react electrochemically.

  The reformer 2 receives the supply of the raw material gas and the reformed water, generates a reformed gas, and guides the gas to the reformed gas line 3. The reformer 2 includes a combustion part 7 for warm-up. The combustion section 7 is supplied with combustion raw materials (natural gas or the like) and reformed gas via the first and second reformed gas lines 3a and 3b as fuel gas. In addition, combustion air is supplied to the combustion unit 7.

  A reforming water line 5 as a pipe of the present invention is provided with a water tank 10, a water pump 11, a water purifier 12, a flow sensor 13, a shut valve 14 and an evaporation unit 15 in that order from the upstream side. The water tank 10 stores reformed water. The water pump 11 pumps the reformed water to the reformer 2 through the reformed water line 5. The water pump 11 uses a motor as a drive source, and adjusts the pumping output of the reforming water by changing the rotation speed of the motor. The water pump 11 corresponds to the pumping means of the present invention. The water purifier 12 filters the reformed water, and includes a filter and a pure water device. The flow sensor 13 detects the reforming water flow rate in the reforming water line 5. The flow rate sensor 13 corresponds to the supply failure detection means of the present invention for detecting the supply failure of the reforming water in the reforming water line 5. Here, the supply failure of reforming water means that, for example, foreign substances such as air and dust are mixed in the reforming water line 5 so that the reforming water to be supplied to the reformer 2 is temporarily insufficient. Assume a case. In addition, it refers to a state in which air or foreign matter is mixed into the reforming water line 5 and the flow of reforming water is obstructed, so that the flow rate of reforming water decreases or the supply pressure of reforming water decreases. In addition, when the flow rate or supply pressure of the reforming water becomes unstable, it is cited as a supply failure of the reforming water. This “unstable” means that the vibration of the flow rate of reforming water per unit time or the supply pressure of reforming water becomes larger than that in the normal state. The shut valve 14 is composed of an electromagnetic valve, and opens and closes the reforming water line 5 and corresponds to the opening / closing means of the present invention. The evaporation unit 15 evaporates the reforming water supplied to the reformer 2. The evaporation unit 15 is heated by flowing the exhaust discharged from the combustion unit 7 of the reformer 2 through the exhaust line 16. The raw material gas line 6 merges with the reforming water line 5 on the downstream side of the evaporation unit 15. Due to this merging, the reformed steam and the raw material gas are mixed and supplied to the reformer 2 as a raw material for generating the reformed gas.

  The water pump 11, the flow sensor 13 and the shut valve 14 described above are electrically connected to the controller 20. The controller 20 controls the water pump 11 and the shut valve 14 based on the detected value related to the reforming water flow rate detected by the flow sensor 13. In this embodiment, the controller 20 controls the water pump 11 based on the detection value of the flow sensor 13 in order to stably supply the reforming water to the reformer 2. In addition, when a temporary supply failure occurs in the reformed water supplied to the reformer 2, the controller 20 controls the water pump 11 based on the detection value of the flow sensor 13 in order to deal with it.

  Next, a control program executed by the controller 20 in order to cope with the supply failure of the reforming water is shown in the flowchart of FIG.

  When the fuel cell system is activated, the controller 20 drives the water pump 11 with a normal output in step 100 and opens the shut valve 14 in step 110.

  Next, the controller 20 reads the detection value of the flow sensor 13 in step 120, and determines in step 130 whether or not there is a supply failure of reforming water based on the read detection value. For example, when the flow rate of the reforming water is less than a predetermined value, the controller 20 determines that there is a supply failure. If this determination result is negative, the controller 20 returns to the process of step 100. On the other hand, if the determination result is affirmative, the controller 20 proceeds to step 140.

  In step 140, the controller 20 increases the output of the water pump 11. Subsequently, in step 150, the controller 20 reads the detection value of the flow sensor 13 again.

  In step 160, the controller 20 determines whether the supply failure of the reforming water has been solved. If this determination result is negative, the controller 20 returns to the process of step 140. On the other hand, if the determination result is affirmative, the controller 20 returns to the process of step 100.

  Here, an example of the execution result of the above control is shown in a time chart in FIG. When the operation of the fuel cell system is started at time t0, the water pump 11 is started at a predetermined normal output at time t1, the shut valve 14 is opened, and the supply of reforming water starts.

  Thereafter, normal supply of the reforming water continues for a while, and when the supply failure of the reforming water occurs and the flow rate of the reforming water decreases at time t2, the supply failure is detected. At time t3, the water pump is detected. 11 output increases.

  When the supply of reforming water is resolved at time t4, the output of the water pump 11 returns to the normal output at time t5.

  According to the fuel cell system of this embodiment described above, the water pump 11 pumps the reformed water to the reformer 2 through the reformed water line 5. The reformer 2 receives the supply of the reforming water and the raw material gas and generates a reformed gas. The generated reformed gas is supplied to the stack 1 through the reformed gas line 3. The stack 1 generates power upon receiving the supply of the reformed gas and the cathode air.

  Here, when a supply failure of reforming water occurs in the reforming water line 5 and is detected by the flow sensor 13, the controller 20 temporarily increases the output of the water pump 11. As a result, the pumping force of the reforming water temporarily increases, and the mixed air and foreign matter in the reforming water line 5 causing the supply failure are pushed out. For this reason, even if the supply failure of reforming water occurs, the failure can be solved without stopping the operation of the fuel cell system, and the supply of reforming water can be stabilized again. That is, even if reforming water supply failure occurs, it is possible to quickly resolve the reforming water supply failure while operating the fuel cell system. The configuration of the fuel cell system as described above is particularly effective for a low-pressure system. Moreover, in the system in which the water purifier 12 is provided as in this embodiment, it is necessary to replace the filter of the water purifier 12 as appropriate, but the air inevitably mixed into the reforming water line 5 when the filter is replaced. Therefore, the configuration of the fuel cell system is effective.

[Second Embodiment]
Next, a second embodiment that embodies the fuel cell system of the present invention will be described in detail with reference to the drawings.

  In each embodiment described below, the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted, and different points will be mainly described below.

  This embodiment is different from the first embodiment in terms of a control program for coping with a problem of supplying reforming water. FIG. 4 is a flowchart showing the control program.

  When the fuel cell system is activated, the controller 20 drives the water pump 11 with a normal output in Step 200 and opens the shut valve 14 in Step 210.

  Next, the controller 20 reads the detection value of the flow sensor 13 in step 220, and determines in step 230 whether or not there is a supply failure of reforming water based on the read detection value. If this determination result is negative, the controller 20 returns to the process of step 200. On the other hand, if the determination result is affirmative, the controller 20 proceeds to step 240.

  In step 240, the controller 20 drives the water pump 11 with a normal output. Subsequently, in step 250, the controller 20 closes the shut valve 14 for a predetermined time, and then returns to the process of step 200.

  Here, an example of the execution result of the above control is shown in a time chart in FIG. When the operation of the fuel cell system is started at time t0, the water pump 11 is started at a predetermined normal output at time t1, the shut valve 14 is opened, and the supply of reforming water starts.

  Thereafter, normal supply continues for a while, and when a supply failure of reforming water occurs and the flow rate of reforming water decreases at time t2, the supply failure is detected, and the shut valve 14 is closed at time t3. At this time, the water pump 11 is in a state of being driven at a normal output. When the shut valve 14 is opened at time t4, the supply failure of the reforming water is solved, and the reforming water returns to normal supply at time t5.

  Therefore, according to the fuel cell system of this embodiment, when a reforming water supply failure occurs in the reforming water line 5 and is detected by the flow rate sensor 13, the controller 20 causes the water pump 11 to output at a normal output. The shut valve 14 is temporarily closed while being driven. Thereby, the supply pressure of the reforming water temporarily increases before and after the shut valve 14 closes and opens, and the mixed air and foreign matter in the reforming water line 5 causing the supply failure are pushed out at a stretch. As a result, even if reforming water supply failure occurs, the failure can be solved without stopping the operation of the fuel cell system, and the supply of reforming water can be stabilized.

[Third Embodiment]
Next, a third embodiment in which the fuel cell system of the present invention is embodied will be described in detail with reference to the drawings.

  This embodiment is different from the first embodiment in terms of a control program for coping with a problem of supplying reforming water. FIG. 6 is a flowchart showing the control program.

  When the fuel cell system is activated, the controller 20 drives the water pump 11 with a normal output in Step 300 and opens the shut valve 14 in Step 310.

  Next, the controller 20 reads the detection value of the flow sensor 13 in step 320, and determines in step 330 whether or not there is a supply failure of reforming water based on the read detection value. If this determination result is negative, the controller 20 returns to the process of step 300. On the other hand, if the determination result is affirmative, the controller 20 proceeds to step 340. In step 340, the controller 20 increases the output of the water pump 11.

  Subsequently, the controller 20 reads the detection value of the flow sensor 13 in step 350, and determines in step 360 whether or not the supply failure of the reforming water has been solved based on the read detection value. If this determination result is negative, the controller 20 returns to the process of step 300. On the other hand, if the determination result is affirmative, the controller 20 proceeds to step 370.

  In step 370, the controller 20 drives the water pump 11 with a normal output. Subsequently, in Step 380, the controller 20 closes the shut valve 14 for a predetermined time, and then returns to Step 300.

  Here, an example of the execution result of the above control is shown in a time chart in FIG. When the operation of the fuel cell system is started at time t0, the water pump 11 is started at a predetermined normal output at time t1, the shut valve 14 is opened, and the supply of reforming water starts.

  After that, normal supply continues for a while. When a reforming water supply failure occurs and the flow rate of the reforming water decreases at time t2, the supply failure is detected. At time t3, the output of the water pump 11 is output. Increase.

  If the supply failure of the reforming water is not resolved, at time t4, the output of the water pump 11 returns to the normal output and the shut valve 14 is closed. When the shut valve 14 is opened at time t5, the supply failure of the reforming water is solved, and the reforming water returns to normal supply at time t6.

Therefore, according to the fuel cell system of this embodiment, when a supply failure of reforming water occurs in the reforming water line 5 and is detected by the flow sensor 13, the controller 20 temporarily outputs the output of the water pump 11. Increase it. Thereby, the pumping force of the reforming water temporarily increases, and mixed air and mixed foreign matters in the piping that cause the supply failure are pushed. If the problem of supplying reforming water still cannot be solved, the controller 20 temporarily closes the shut valve 14 while driving the water pump 11 with the normal output. As a result, the supply pressure of the reforming water temporarily rises before and after the shut valve 14 closes and opens, and the mixed air and foreign matter in the reforming water line 5 causing the supply failure are pushed out at a stretch. As a result, even if reforming water supply failure occurs, the failure can be solved without stopping the operation of the fuel cell system, and the supply of reforming water can be stabilized.
Instead of the control described above, the control for closing the shut valve 14 may be performed first, and if the supply failure is still not solved, the control may be performed in the order of increasing the output of the water pump 11.

[Fourth Embodiment]
Next, a fourth embodiment that embodies the fuel cell system of the present invention will be described in detail with reference to the drawings.

  This embodiment is different from the first embodiment in terms of a control program for coping with a problem of supplying reforming water. FIG. 8 is a flowchart showing the control program.

  When the fuel cell system is activated, the controller 20 drives the water pump 11 with a normal output in Step 400 and opens the shut valve 14 in Step 410.

  Next, the controller 20 reads the detection value of the flow sensor 13 in step 420, and determines in step 430 whether or not there is a supply failure of reforming water based on the read detection value. If this determination result is negative, the controller 20 returns to the process of step 400. On the other hand, if the determination result is affirmative, the controller 20 proceeds to step 440.

  In step 440, the controller 20 increases the output of the water pump 11 for a predetermined time. In step 450, the controller 20 closes the shut valve 14 for a predetermined time, and then returns to the processing in step 400.

  Here, an example of the execution result of the above control is shown in a time chart in FIG. When the operation of the fuel cell system is started at time t0, the water pump 11 is started at a predetermined normal output at time t1, the shut valve 14 is opened, and the supply of reforming water starts.

  After that, normal supply continues for a while. When a reforming water supply failure occurs and the flow rate of the reforming water decreases at time t2, the supply failure is detected. At time t3, the output of the water pump 11 is output. Increases and shut valve 14 closes.

  Thereafter, when the water pump 11 returns to the normal output at time t4 and the shut valve 14 is opened, the supply failure of the reforming water is resolved, and the reforming water returns to normal supply at the time t5.

  Therefore, according to the fuel cell system of this embodiment, when a supply failure of reforming water occurs in the reforming water line 5 and is detected by the flow sensor 13, the controller 20 temporarily outputs the output of the water pump 11. The shut valve 14 is temporarily closed from the open state. As a result, the pumping force of the reforming water temporarily increases, and the supply pressure of the reforming water temporarily increases before and after the shut valve 14 is closed and opened, and the mixed air in the piping causing the supply failure Or foreign materials are pushed out at once. As a result, even if reforming water supply failure occurs, the failure can be solved without stopping the operation of the fuel cell system, and the supply of reforming water can be stabilized.

  The present invention is not limited to the above-described embodiments, and can be carried out as follows without departing from the spirit of the invention.

  In each of the above-described embodiments, the flow rate sensor 13 that detects a change in the flow rate of the reforming water is used as the supply failure detection means. However, a pressure sensor that detects a change in the pressure of the reforming water is used, You may use the optical fiber sensor which detects the presence or absence of reforming water. The pressure sensor described above may be provided so as to detect a pressure change near the inlet of the reformer.

1 is a schematic configuration diagram illustrating a fuel cell system according to a first embodiment. The flowchart which shows a control program. The time chart which shows an example of a control execution result. The flowchart which concerns on 2nd Embodiment and shows a control program. The time chart which shows an example of a control execution result. The flowchart which concerns on 3rd Embodiment and shows a control program. The time chart which shows an example of a control execution result. The flowchart which concerns on 4th Embodiment and shows a control program. The time chart which shows an example of a control execution result.

Explanation of symbols

1 stack (fuel cell)
2 Reformer 5 Reformed water line (pipe)
11 Water pump (pressure feeding means)
13 Flow rate sensor (supply failure detection means)
14 Shut valve (open / close means)
20 controller (control means, first control means, second control means)

Claims (4)

A fuel cell that generates power by receiving a reformed gas containing hydrogen and an oxidant gas containing oxygen;
A reformer that receives the supply of raw material gas and reforming water and generates the reformed gas;
In a fuel cell system comprising a pumping means for pumping the reformed water to the reformer through a pipe,
Supply failure detection means for detecting supply failure of the reforming water in the piping;
A fuel cell system comprising: control means for temporarily increasing the output of the pressure feeding means when the supply failure is detected. A fuel cell that generates power by receiving a reformed gas containing hydrogen and an oxidant gas containing oxygen;
A reformer that receives the supply of raw material gas and reforming water and generates the reformed gas;
In a fuel cell system comprising a pumping means for pumping the reformed water to the reformer through a pipe,
Supply failure detection means for detecting supply failure of the reforming water in the piping;
Opening and closing means for opening and closing the pipe;
A fuel cell system comprising: control means for temporarily closing the opening / closing means from an open state while operating the pressure feeding means when the supply failure is detected. A fuel cell that generates power by receiving a reformed gas containing hydrogen and an oxidant gas containing oxygen;
A reformer that receives the supply of raw material gas and reforming water and generates the reformed gas;
In a fuel cell system comprising a pumping means for pumping the reformed water to the reformer through a pipe,
Supply failure detection means for detecting supply failure of the reforming water in the piping;
Opening and closing means for opening and closing the pipe;
First control means for temporarily increasing the output of the pressure feeding means when the supply failure is detected;
A second control means for temporarily closing the opening / closing means from an open state while operating the pressure feeding means when the supply failure is detected even after the output of the pressure feeding means is temporarily increased. A fuel cell system. A fuel cell that generates power by receiving a reformed gas containing hydrogen and an oxidant gas containing oxygen;
A reformer that receives the supply of raw material gas and reforming water and generates the reformed gas;
In a fuel cell system comprising a pumping means for pumping the reformed water to the reformer through a pipe,
Supply failure detection means for detecting supply failure of the reforming water in the piping;
Opening and closing means for opening and closing the pipe;
A fuel cell system comprising: control means for temporarily increasing the output of the pressure feeding means and temporarily closing the opening / closing means from an open state when the supply failure is detected.

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