JP2009231184A - Fuel battery system and operating method for fuel battery system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel battery system for aiming at deterioration prevention of a fuel battery and improvement on power generation efficiency by restraining influence of ambient weather. <P>SOLUTION: Feedback control of an air supply to a fuel battery is carried out on a fuel battery module FC on the basis of neighboring atmospheric pressure of fuel battery cell stacks 21a to 21c. Consequently, temperature variation of the fuel battery cell stacks 21a to 21c caused by variation of the atmospheric pressure is restrained, and the fuel battery cell stacks 21a to 21c are always operated at a suitable temperature range. There are problems that deterioration of the fuel battery is accelerated on the fuel battery system when temperature of the fuel battery is too high in its operation and power generation efficiency is reduced when the temperature of the fuel battery is too low. Consequently, deterioration prevention of the fuel battery module FC and improvement on power generation efficiency are attained by always operating the fuel battery cell stacks 21a to 21c at the suitable temperature range on the basis of the processing. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a solid oxide fuel cell system and an operation method thereof.

  Development of fuel cell systems that can directly convert chemical energy into electrical energy is underway. Among fuel cells, a solid oxide fuel cell (SOFC) system has attracted attention as a fuel cell with particularly high power generation efficiency.

As a technique for further improving the power generation efficiency of a solid oxide fuel cell, for example, in Patent Document 1, hydrogen in the fuel electrode off-gas is stored in a hydrogen storage container during full load operation, and hydrogen is stored during partial load operation. A fuel cell system that generates power using hydrogen in the storage container as fuel is disclosed. For example, Patent Document 2 discloses a fuel cell system including a heat utilization unit such as a heater or a heat accumulator between a fuel cell stack and a heat insulation heat insulation layer or in a heat insulation heat insulation layer.
JP 2004-071315 A JP 2005-1000082 A

  In the fuel cell system described above, there is a problem that when the temperature of the fuel cell becomes too high during operation, the deterioration of the fuel cell is promoted, and when the temperature becomes too low, the power generation efficiency is lowered. On the other hand, it is conceivable that the temperature of the fuel cell system is subject to fluctuations due to the influence of the surrounding weather conditions regardless of whether or not the operation is performed. Therefore, there is a need for a technique for operating the fuel cell system at an appropriate temperature in consideration of the surrounding environment.

  The present invention has been made to solve the above problems, and provides a fuel cell system capable of preventing deterioration of the fuel cell and improving power generation efficiency by suppressing the influence of the surrounding environment, and an operation method thereof. The purpose is to provide.

  In order to achieve the above object, a fuel cell system according to the present invention includes a fuel cell stack formed by connecting a plurality of fuel cells, a heat insulating member disposed around the fuel cell stack, and the operation of the fuel cell. A fuel cell system including a control unit that controls conditions, the fuel cell system including a detection unit that acquires a physical quantity related to a weather state at or near the installation location of the fuel cell stack, and the control unit is acquired by the detection unit It is characterized by feedback control of the operating conditions of the fuel cell based on the physical quantity.

  In addition, the operating method of the fuel cell system according to the present invention controls a fuel cell stack formed by connecting a plurality of fuel cells, a heat insulating member disposed around the fuel cell stack, and operating conditions of the fuel cell. A control method for operating a fuel cell system, the step of acquiring a physical quantity related to a weather condition at or near the installation location of the fuel cell stack, and the fuel cell based on the physical quantity acquired by the detection unit And a step of performing feedback control of the operating conditions.

  According to the present invention, it is possible to prevent deterioration of the fuel cell and improve power generation efficiency by suppressing the influence of the surrounding environment.

  Prior to describing the best mode for carrying out the present invention, the background leading to the present invention and the effects of the present invention will be described. In order to solve the problems of the present invention, the present inventors have studied the operation of the fuel cell system from various angles. First, the present inventors have found a phenomenon in which the temperature of the fuel cell module fluctuates even when no operation is performed when the fuel cell system is operated. Therefore, in Chigasaki City, Kanagawa Prefecture, the fuel cell module was operated without any operation from 1:00 on the first day in the end of November to 23:00 on the eighth day (hereinafter, experimental period) The relationship between atmospheric pressure change and module temperature was investigated. FIG. 1 shows changes in atmospheric pressure at the Yokohama Meteorological Observatory (Kanagawa Prefecture) during the experimental period. FIG. 2 shows a comparison of atmospheric pressure, its moving average (20 hours) change, and temperature change in the fuel cell module.

  The knowledge obtained from this study is as follows. The 20-section moving average of atmospheric pressure change and in particular the temperature change in the lower stage of the fuel cell are in a substantially symmetrical fluctuation state. For example, there is a tendency that the temperature in the lower stage of the fuel battery cell rises with a delay when the atmospheric pressure decreases. This is probably due to a delay in the effect of improving heat insulation due to a decrease in atmospheric pressure. Since the influence of heat generation of the air heater is large in the upper stage of the fuel cell and that of the fuel battery cell is great in the middle stage of the fuel battery cell, this influence is considered to be relatively small. In the lower part of the fuel cell, there are many parts surrounded by a heat insulating material, and the fuel gas flow rate is also small, so it is estimated that the influence is most significant. In addition, it seems that the fluctuation of the battery performance due to the atmospheric pressure also has an influence. When the atmospheric pressure decreases, the power generation performance decreases, and the amount of heat generation increases accordingly. As a result, it was found that even if the fuel cell system is not operated, there is a fluctuation of less than 10 ° C. even in the middle stage of the fuel cell that reaches the maximum temperature due to a change in atmospheric pressure. However, although this study examined the effect of atmospheric pressure fluctuations on the fuel cell module, it can be assumed that other meteorological factors may have some effect on the fuel cell module. It is thought that the meteorological element can be extended. Based on these findings, the present inventors have accomplished the present invention described below in order to solve the above problems by an operation incorporating changes in atmospheric pressure and other weather fluctuations.

  A fuel cell system according to the present invention includes a fuel cell stack formed by connecting a plurality of fuel cells, a heat insulating member disposed around the fuel cell stack, and a control unit that controls operating conditions of the fuel cell. The fuel cell system includes a detection unit that acquires a physical quantity related to a weather condition at or near the installation location of the fuel cell stack, and the control unit operates the fuel cell based on the physical quantity acquired by the detection unit. It is characterized by feedback control of conditions.

  In addition, the operating method of the fuel cell system according to the present invention controls a fuel cell stack formed by connecting a plurality of fuel cells, a heat insulating member disposed around the fuel cell stack, and operating conditions of the fuel cell. A fuel cell system comprising: a control unit that obtains a physical quantity related to a weather condition at or near a place where the fuel cell stack is installed, and operates the fuel cell based on the physical quantity obtained by the detection unit It is characterized by feedback control of conditions.

  The fuel cell system and the operation method according to the present invention feedback-controls the operation conditions of the fuel cell based on the physical quantity relating to the weather condition at or near the installation location of the fuel cell stack. Therefore, temperature fluctuations of the fuel cell stack due to weather conditions are suppressed, and the fuel cell stack can be operated in an appropriate temperature range. Thereby, deterioration of a fuel cell can be prevented and power generation efficiency can be improved.

  The physical quantity is preferably atmospheric pressure. Since the heat insulating member is disposed around the fuel cell stack, when the ambient atmospheric pressure varies, the temperature of the fuel cell stack tends to vary with time delay. Therefore, by controlling the operating conditions of the fuel cell stack based on the atmospheric pressure, the fuel cell stack can be operated in a more appropriate temperature range.

  The physical quantity is preferably a precipitation probability. As the probability of precipitation and atmospheric pressure have a certain relationship, as in the case described above, controlling the operating conditions of the fuel cell stack based on the probability of precipitation will keep the fuel cell stack under an appropriate temperature range. You can drive at.

  In addition, it is preferable that an air supply unit that supplies air toward the fuel cell stack is provided, and the control unit controls the amount of air supplied from the air supply unit based on a physical quantity. As a result, the fuel cell stack can be more reliably operated under an appropriate temperature range.

  Further, it is preferable that a fuel supply unit that supplies fuel gas toward the fuel cell stack is provided, and the control unit controls the amount of gas supplied from the fuel supply unit based on a physical quantity. As a result, the fuel cell stack can be more reliably operated under an appropriate temperature range.

  Moreover, it is preferable that a control part controls the electric power generation electric power or electric power generation in a fuel cell stack based on a physical quantity. As a result, the fuel cell stack can be more reliably operated under an appropriate temperature range.

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

  FIG. 3 is a schematic perspective view in which the fuel cell module FC according to this embodiment is partially broken. The fuel cell module FC is configured as a device for generating electric power by causing an electrochemical reaction between fuel gas and air (oxidant gas).

  The fuel cell module FC includes a fuel cell 2, current collecting members 3 and 4, a current collecting rod 5, an air header 6, an air supply pipe 7, a module container 8, an insulating heat insulating member 9, and a heat insulating member. 10.

The fuel battery cells 2 are configured as fuel battery cell stacks (not explicitly shown in FIG. 3) for every 12 of 2 × 6 rows, and are housed in the module container 8. Each fuel cell 2 has a bottomed cylindrical shape and is mainly made of a ceramic material, and forms a multilayer structure of an air electrode, a solid oxide electrolyte, and a fuel electrode from the inside to the outside of the cylinder. Air to the inner wall namely the air electrode of the fuel cell 2, the fuel gas contacts the outer wall That fuel electrode, a potential difference occurs between the air electrode and the fuel electrode, an electrochemical reaction O ^2- ions move in the electrolyte Occurs and power is generated. The electricity generated by the fuel cell 2 is collected by the current collecting members 3 and 4 and taken out by the current collecting rod 5.

  The air supplied to each fuel cell 2 is supplied by distributing the air supplied to the air header 6 through the air supply pipe 7. In the present embodiment, three air headers 6 are provided, and an air supply pipe 7 is connected to each air header 6. The upstream side of the air supply pipe 7 is connected to an air supply source.

  The air header 6 serves to temporarily store and raise the temperature of air supplied to each fuel battery cell 2 and also to distribute air to each fuel battery cell 2. The air header 6 is also for distributing the flow path of the air supplied to each fuel cell 2 to a plurality of systems according to the number of the fuel cells 2, so that the air header 6 corresponds to the number of the fuel cells 2. The placement quantity is increased or decreased.

  The fuel gas supplied to each fuel cell 2 is supplied from below each fuel cell 2 (details will be described later).

  The fuel cell 2, the current collecting members 3 and 4, and the air header 6 are accommodated in a rectangular parallelepiped module container 8. The module container 8 is made of a heat-resistant alloy material such as Inconel or stainless steel because it becomes hot during operation. Moreover, it has a sealed structure in order to prevent fuel gas and air from leaking outside. Inside the module container 8, an insulating heat insulating member 9 is provided to insulate the fuel cell 2 and the module container 8 and keep the inside of the module container 8 warm. The insulating heat insulating member 9 is made of alumina fiber or the like. Further, the module container 8 is entirely covered with a heat insulating member 10 made of a high-porosity material mainly composed of silica, alumina, silicon carbide, or the like in order to keep the operating temperature stable.

  Then, the arrangement | positioning aspect of the fuel cell 2 is demonstrated, referring FIG. 4 is a cross-sectional view in a direction in which the fuel cell 2 side is seen from the air header 6 side in FIG. The fuel cell assembly 21 includes a plurality of fuel cell stacks 21a, 21b, and 21c. Each fuel cell stack 21a, 21b, 21c has 12 fuel cells 2, and each fuel cell 2 is arranged in 2 rows (x direction in the figure) × 6 rows (y direction in the figure). Has been.

  Each fuel cell 2 has a bottomed cylindrical shape, and is arranged with its opening 2a facing the air header 6 side. Each fuel cell 2 is electrically connected in 2 parallel × 6 series via an inter-cell current collecting member 13 and a conductive cell connecting member 14. The number and arrangement of the fuel cells 2 are appropriately selected according to the power generation capacity and the like.

  The fuel cell stacks 21a, 21b, and 21c are arranged in three rows (in the x direction in the figure) at a predetermined interval, and constitute a fuel cell assembly 21 having 36 fuel cells 2. ing. Each of the fuel cell stacks 21a, 21b, and 21c is electrically connected in series via the current collecting member 3. The current collecting member 4 is connected to the ends of the fuel cell stacks 21a, 21c arranged at both ends of the fuel cell stacks 21a, 21b, 21c connected in series in this way. Since the current collecting member 4 is connected to the current collecting rod 5, electric power can be taken out through the current collecting rod 5.

  Each of the fuel cell stacks 21a, 21b, and 21c is provided with an insulating plate 16 so as to contact a pair of side surfaces in which the fuel cells 2 are arranged in six rows. Further, a heat conduction plate 15 is disposed between adjacent insulating plates 16. A heat conducting plate 15 is also disposed between the fuel cell stacks 21a and 21c and the insulating heat insulating member 9. An insulating rod 11 is disposed between the heat conducting plate 15 and the current collecting members 3 and 4.

  By arranging the heat conduction plate 15 in this way, even when the temperature of the fuel cell 2 is partially increased locally, heat easily moves from the high temperature portion to the low temperature portion via the heat conduction plate 15. Thus, the temperature distribution of the fuel cell 2 can be made uniform.

  Further, as described above, the insulating plate 16 and the insulating rod 11 are arranged, so that the electrical insulation between the heat conducting plate 15 and the fuel cell 2 and the heat conducting plate 15 and the current collecting members 3 and 4 Electrical insulation is ensured.

  Next, an arrangement mode of the fuel cells 2 and a supply mode of the fuel gas and air will be described with reference to FIG. FIG. 5 is a longitudinal sectional view of the fuel cell module FC, and shows the inside of the module container 8.

  As shown in FIG. 5, a fuel gas dispersion chamber 17 for uniformly dispersing the fuel gas introduced into the module container 8 is disposed below the module container 8. In the fuel gas dispersion chamber 17, a pre-dispersion plate 18 for pre-dispersing the fuel gas is disposed. A fuel gas ventilation hole 19 is formed in the preliminary dispersion plate 18. Further, a fuel gas dispersion material 20 made of, for example, Ni foam is disposed above the preliminary dispersion plate 18. A fuel gas supply pipe 22 is provided on the upstream side (lower side in the figure) of the fuel gas dispersion chamber 17, and the upstream side of the fuel gas supply pipe 22 is connected to a fuel gas supply source. Further, a fuel gas dispersion plate 23 is provided between the module container 8 and the fuel gas dispersion chamber 17 to allow the fuel gas to flow from the fuel gas dispersion chamber 17 to the module container 8. The fuel gas distribution plate 23 has a plurality of fuel gas supply holes 24 formed therein.

  In addition, a plurality of air introduction pipes 25 for introducing air into the air electrode of the fuel cell 2 are connected to the air header 6 disposed above the fuel cell assembly 21. The air introduction pipe 25 is inserted into the pipe of the fuel cell 2, and its lower end extends to the vicinity of the bottom surface of the fuel battery cell 2.

  In the module container 8, a rectangular partition plate 26 formed along the direction perpendicular to the longitudinal direction of the fuel cell 2 is provided. The partition plate 26 is formed by laminating alumina fibers into a blanket shape. In the module container 8, a combustion chamber 27 is formed on the upper side partitioned by the partition plate 26, and a power generation chamber 28 is formed on the lower side. Here, the combustion chamber 27 mixes and burns surplus fuel gas that has not contributed to the reaction in the power generation chamber 28 and surplus air that has not contributed to the reaction in the cylinder of each fuel cell 2. Space. The power generation chamber 28 is a space for bringing the fuel gas introduced from the fuel gas supply hole 24 into contact with each fuel cell 2 and generating an electrochemical reaction with the air flowing in the pipe of each fuel cell 2 to generate power. It is.

  Further, the partition plate 26 discharges the remaining fuel gas from the power generation chamber 28 to the combustion chamber 27.

  Next, the configuration of the fuel cell system FCS using the fuel cell module FC will be described with reference to FIG. FIG. 6 is a block diagram showing the configuration of the fuel cell system FCS. As shown in FIG. 6, the fuel cell system FCS includes a fuel cell module FC, a fuel supply unit FP, an air supply unit AP, a water supply unit WP, a power extraction unit EP, a detection unit 50, and a control unit. CS. The fuel supply unit FP, the air supply unit AP, the water supply unit WP, and the power extraction unit EP constitute an auxiliary device AD of the fuel cell system FCS.

  The fuel supply unit FP is a part that supplies fuel gas from a city gas pipe as a fuel supply source to the fuel cell module FC, and includes a fuel pump and an electromagnetic valve. The fuel gas supplied from the fuel supply unit FP is sent out to the fuel gas supply pipe 22.

  The air supply unit AP is a part that supplies air from the atmosphere as an air supply source to the fuel cell module FC, and includes an air blower and an electromagnetic valve. Air supplied from the air supply unit AP is sent out to the air supply pipe 7.

  The water supply unit WP is a part that supplies water from a water pipe as a water supply source to the fuel cell module FC, and includes a water pump and an electromagnetic valve. The water supplied from the water supply unit WP is supplied as steam outside the fuel cell module FC.

  The power extraction unit EP is a part that extracts electric power from the fuel cell module FC, and includes a power conversion device such as an inverter. The power extraction unit EP is connected to the current collecting rod 5 and is configured to send the converted power to a power supply destination.

  The detection part 50 is a part which acquires the physical quantity regarding the weather condition of the vicinity of the fuel cell stack 21a, 21b, 21c. More specifically, the detection unit 50 is an atmospheric pressure sensor. The detection unit 50 outputs, for example, atmospheric pressure data detected every hour to the control unit CS.

  The control unit CS is a unit for controlling each of the fuel supply unit FP, the air supply unit AP, the auxiliary device AD, and the power extraction unit EP, and includes a CPU and a ROM. The operation of the fuel cell module FC is executed based on an instruction signal from the control unit CS. The control unit CS feedback-controls the operating conditions of the fuel cell stacks 21a, 21b, and 21c based on the physical quantity acquired by the detection unit 50.

  The operation of the fuel cell system FCS configured as described above will be described.

  The power generation chamber 28 is heated to a temperature (700 to 1000 ° C.) at which an electrochemical reaction occurs. Air is supplied from the air supply unit AP into the air header 6 through the air supply pipe 7. The air in the air header flows downward through the plurality of air introduction pipes 25 and flows out into the cylinder of the fuel cell 2 from the lower end. The outflowed air flows upward in the cylinder of the fuel battery cell 2. At this time, the air is brought into contact with the air electrode and subjected to the reaction. The air not consumed by the reaction reaches the combustion chamber 27 from the opening 2 a of the fuel cell 2.

  Further, the fuel gas is supplied from the fuel supply unit FP to the fuel gas supply pipe 22 and supplied into the fuel gas dispersion chamber 17. The supplied fuel gas is introduced into the power generation chamber 28 from a plurality of fuel gas supply holes 24 formed in the fuel gas dispersion plate 23 and flows upward in the power generation chamber 28 while surrounding each fuel cell 2. At this time, the fuel gas is brought into contact with the fuel electrode for reaction. The fuel gas not consumed by the reaction reaches the combustion chamber 27 through the partition plate 26.

  The remaining fuel gas that has reached the combustion chamber 27 is mixed with the remaining air, and is naturally burned by using a predetermined ignition device or by an increase in temperature, and the exhaust gas is connected to the upper wall of the module container 8. It is discharged out of the combustion chamber 27 from the exhaust gas pipe. Since this exhaust gas becomes high temperature, it is also used as a heat source for heating the power generation chamber 28.

  Next, operation condition control of the fuel cell system FCS in the control unit CS will be described.

  FIG. 7 is a flowchart showing the operation condition control. As shown in FIG. 7, first, the detection unit 50 detects the atmospheric pressure in the vicinity of the fuel cell stacks 21a, 21b, and 21c (step S01). The detection of the atmospheric pressure is performed, for example, every hour, and the detected atmospheric pressure data is sequentially output to the control unit CS.

  The control unit CS performs, for example, a moving average process for every 20 data points on the atmospheric pressure data received from the detection unit 50 (step S02). Since the heat insulating member 10 and the like are arranged around the fuel cell stacks 21a, 21b, and 21c, the temperature change of the fuel cell stacks 21a, 21b, and 21c is delayed by about 20 hours with respect to the change in atmospheric pressure. Tend to occur. Therefore, by performing the above-mentioned moving average process, it is possible to make the atmospheric pressure fluctuations substantially coincide with the temperature fluctuations of the fuel cell stacks 21a, 21b, 21c.

  Next, the control unit CS adjusts the amount of air supplied from the air supply unit AP to the fuel cell stacks 21a, 21b, and 21c based on the atmospheric pressure data after the moving average process (step S03). FIG. 8 is a diagram illustrating an example of control of the air supply amount. In the example shown in FIG. 8, the air supply amount with respect to the air amount reference value is changed so as to be reversed with the change in the atmospheric pressure data with respect to the atmospheric pressure reference value. The fluctuation amount of the air supply amount is twice as sensitive as the fluctuation amount of the atmospheric pressure data. That is, when the atmospheric pressure data increases by 1% with respect to the reference value, the air supply amount is decreased by 2% with respect to the reference value.

  As described above, in the fuel cell module FC, the air supply amount of the fuel cell is feedback controlled based on the atmospheric pressure in the vicinity of the fuel cell stacks 21a, 21b, and 21c. Therefore, temperature fluctuations of the fuel cell stacks 21a, 21b, and 21c due to fluctuations in atmospheric pressure are suppressed, and the fuel cell stacks 21a, 21b, and 21c can always be operated in an appropriate temperature range. As a result, deterioration of the fuel cell system FCS can be prevented and power generation efficiency can be improved.

  Although a preferred embodiment of the present invention has been described in detail, the present invention is not limited to the above embodiment. For example, in the above embodiment, the atmospheric pressure sensor is exemplified as the detection unit 50 that acquires the physical quantity related to the weather condition, but the detection unit 50 may be a reception unit that acquires information related to the precipitation probability from an external server or the like. Since the precipitation probability and the atmospheric pressure have a certain relationship, the fuel cell stack 21a is controlled by controlling the operating conditions of the fuel cell stacks 21a, 21b, and 21c based on the precipitation probability, as in the above case. , 21b, 21c can be operated under an appropriate temperature range.

  Further, in the above embodiment, the air supply amount is controlled based on the fluctuation of the atmospheric pressure data. However, the control by the control unit CS may be performed for the fuel gas amount supplied from the fuel supply unit FP, for example. . Moreover, a predetermined resistance may be connected to the control unit CS to control the generated current or generated power in the fuel cell stacks 21a, 21b, and 21c.

It is a figure which shows atmospheric pressure fluctuation. It is a figure which shows atmospheric pressure fluctuation | variation and the temperature change of a fuel cell module. It is the schematic perspective view which fractured partially the fuel cell system concerning this embodiment. FIG. 2 is a cross-sectional view in a direction in which the fuel cell side is seen from the air header side in FIG. 1. It is a longitudinal cross-sectional view of a fuel cell system. It is a block diagram which shows the structure of a fuel cell. It is a flowchart which shows the operating condition control of the fuel cell in a control part. It is a figure which shows an example of control of the air supply amount.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Fuel cell, 2a ... Opening part, 3, 4 ... Current collection member, 5 ... Current collection rod, 6 ... Air header, 7 ... Air supply pipe, 8 ... Module container, 9 ... Insulation heat insulation member, 10 ... Heat insulation 11: Insulating rod, 13 ... Current collecting member between cells, 14 ... Cell connecting member, 15 ... Heat conduction plate, 16 ... Insulating plate, 17 ... Fuel gas dispersion chamber, 18 ... Preliminary dispersion plate, 19 ... Fuel gas flow Pore, 20 ... fuel gas dispersion material, 21 ... fuel cell assembly, 21a, 21b, 21c ... fuel cell stack, 22 ... fuel gas supply pipe, 23 ... fuel gas dispersion plate, 24 ... fuel gas supply hole, 25 DESCRIPTION OF SYMBOLS ... Air introduction pipe, 26 ... Partition plate, 27 ... Combustion chamber, 28 ... Power generation chamber, 50 ... Detection part, AD ... Auxiliary device, AP ... Air supply part, CS ... Control part, EP ... Electricity extraction part, FC ... Fuel Battery module, FCS ... Fuel cell system, FP ... Fuel supply unit, P ... water supply unit.

Claims (7)

A fuel cell system comprising a fuel cell stack formed by connecting a plurality of fuel cells, a heat insulating member disposed around the fuel cell stack, and a control unit for controlling operating conditions of the fuel cell. And
A detection unit for obtaining a physical quantity related to a weather condition in or near the installation location of the fuel cell stack;
The control unit feedback-controls the operating condition of the fuel cell based on the physical quantity acquired by the detection unit.   The fuel cell system according to claim 1, wherein the physical quantity is atmospheric pressure.   The fuel cell system according to claim 1, wherein the physical quantity is a precipitation probability. An air supply unit for supplying air toward the fuel cell stack;
The said control part controls the air quantity supplied from the said air supply part based on the said physical quantity, The fuel cell system as described in any one of Claims 1-3 characterized by the above-mentioned. A fuel supply unit for supplying fuel gas toward the fuel cell stack;
5. The fuel cell system according to claim 1, wherein the control unit controls an amount of gas supplied from the fuel supply unit based on the physical quantity.   The fuel cell system according to claim 1, wherein the control unit controls a generated current or generated power in the fuel cell stack based on the physical quantity. Operation of a fuel cell system comprising a fuel cell stack formed by connecting a plurality of fuel cells, a heat insulating member disposed around the fuel cell stack, and a control unit for controlling operating conditions of the fuel cell A method,
Obtaining a physical quantity related to the weather condition of the installation location of the fuel cell stack or the vicinity thereof,
An operation method of a fuel cell system, wherein the operation condition of the fuel cell is feedback controlled based on the physical quantity acquired by the detection unit.

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