JP6981867B2 - Fuel cell device - Google Patents

Description

The present invention relates to a fuel cell device.

As a configuration of the fuel cell, a fuel cell module having a cell stack in which a plurality of fuel cell cells capable of obtaining power by using fuel gas (hydrogen-containing gas) and air (oxygen-containing gas) are stacked in a storage container is provided. , And various fuel cell devices in which the fuel cell module and auxiliary equipment necessary for its operation are housed in a housing such as an outer case have been proposed.

In such a fuel cell device, excess fuel gas that has not been used for power generation is burned, and the exhaust gas after combustion is passed through a heat exchanger or the like to be cooled, and at the time of this heat exchange, the water vapor contained in the exhaust gas is contained. The condensed water generated by condensing is collected in a condensed water recovery device, purified with an ion exchange resin, stored in a water tank (reformed water tank), etc., and the stored treated water is stored in natural gas, etc. The so-called self-sustaining water operation is performed in which the raw material and fuel of the above are supplied as reforming water to a reformer that reforms steam.

Further, in the reformed water tank, an electric conductivity meter (also referred to as a conductivity meter or a conductivity meter) for measuring the conductivity of deionized water (reformed water and stored water) after purification treatment is provided. A water level sensor or the like for measuring the amount of the stored reformed water is provided (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2005-129237

By the way, as described above, in a fuel cell device that purifies condensed water generated in a heat exchanger and uses it as reforming water, tap water containing a large amount of impurities is used as a heat medium (refrigerator) of the heat exchanger. In some cases, water such as water leaks out due to corrosion of the pipe and is mixed in the condensed water or the flow path for collecting the condensed water.

However, when the electric conductivity meter is placed in the reformed water tank as in the conventional configuration, the water containing a large amount of impurities is diluted with the water contained in the reformed water tank, so that the water can be quickly. It may be difficult to detect leakage or contamination of a heat medium or the like mixed with a large amount of impurities.

Further, if water containing a large amount of impurities is mixed into the reformed water, the impurities or the like may reach the cell stack and cause damage to the fuel cell or the like operating at a high temperature. Therefore, it is desired that the fuel cell device has a mechanism capable of detecting leakage or mixing of a heat medium or the like containing a large amount of impurities as soon as possible, as described above.

An object of the present invention is to provide a fuel cell device capable of early detection of mixing of a heat medium leaking from a heat exchanger into reformed water.

The fuel cell apparatus of the present disclosure includes a fuel cell, a fuel cell module having a reformer for steam reforming raw fuel, and a fuel cell module.
A heat exchanger that exchanges heat between the exhaust gas discharged from the fuel cell module and the heat medium for cooling the exhaust gas.
A reformed water tank that stores condensed water in which the water in the exhaust gas is condensed, which is generated by cooling the exhaust gas, as reformed water for steam reforming.
A condensed water flow path that allows the condensed water generated by the heat exchanger to flow through the reformed water tank, and
The electric conductivity meter for measuring the conductivity of the condensed water is provided.
The electric conductivity meter is arranged between the heat exchanger and the reformed water tank in the condensed water flow path .
It has an ion exchange resin that purifies the condensed water, and the condensed water that has passed the ion exchange resin is stored in the reformed water tank.
The condensed water flow path is provided with a condensed water storage unit for storing the condensed water.
The ion exchange resin is disposed in the reformed water tank.
The condensed water storage portion is characterized in that it is disposed above the ion exchange resin in the reformed water tank.

The fuel cell device of the present disclosure can detect the mixing of the heat medium leaked from the heat exchanger into the reformed water at an early stage. In addition, this makes it possible to quickly detect abnormalities in heat exchangers, heat medium piping, etc., and prevent the occurrence of failures such as damage to fuel cell cells and emergency shutdown of equipment caused by these abnormalities. Can be prevented.

It is a schematic block diagram of the fuel cell apparatus of embodiment. It is a block diagram around the reforming water tank which shows the F part of FIG. 1 enlarged. It is an external perspective view of a fuel cell device. It is an exploded perspective view of the reforming water tank used for the fuel cell apparatus of embodiment. It is sectional drawing of the reforming water tank of FIG.

Hereinafter, the fuel cell apparatus of the embodiment will be described with reference to the drawings.
1 to 3 are diagrams illustrating a schematic configuration of the fuel cell device of the embodiment. Note that FIG. 2 is a schematic configuration around the reforming water tank, which is an enlarged view of the F portion of FIG.

The fuel cell device 100 of the embodiment includes power supply by operating a fuel cell module 1 (fuel cell) that generates power by using raw fuel such as natural gas and LP gas and air, a heat exchanger 3, and a radiator 4. , Hot water is supplied using an exhaust heat recovery system (heat cycle HS system in the figure) including a heat medium circulation pump P3 and a heat storage tank 5. It is also possible to use a so-called monogeneration system that does not supply hot water. Further, the radiator 4 may not be provided.

Further, the fuel cell device 100 includes a reforming water tank 6, a power conditioner 20, a control device 30, a storage device 40 and the like as auxiliary devices in addition to the fuel cell module 1 and the like described above. Further, the fuel cell device 100 includes a reforming water flow path R including a reforming water pump P1, a drainage flow path D including a drainage pump P2, electric conductivity meters WC ₁ and WC _2, and a water detector WL _1. , WL _{2 and the} like are provided with at least a water level sensor.

The fuel cell module 1 is housed in a storage container 10, and a cell stack 11 in which a plurality of fuel cell cells are laminated, and a reformer 12 that reforms the raw fuel with steam using steam. It is provided with an ignition heater (not shown) for igniting excess fuel gas, an exhaust gas catalyst filled in the catalyst container 2, and the like. Then, as shown in FIG. 3, the fuel cell module 1 is arranged in a case 50 including each frame 51 and an exterior panel (not shown).

Although not shown in FIG. 3, the case 50 contains oxygen such as gas pump B1 for supplying raw fuel such as natural gas to the reformer and air (outside air) as illustrated in FIG. An air blower B2 that supplies gas to the cell stack, a reforming water pump P1 that supplies the reforming water in the reforming water tank 5 to the reformer 12 as raw material water for steam reforming, and a reforming water tank 6 A drainage pump P2 for discharging the surplus water that has become surplus in the above-mentioned machine, a drainage flow path D for discharging the surplus water in the reformed water tank 6, and the like are arranged. Further, in the case 50, as described above, the power conditioner 20 linked to the system power supply, the control device 30 including the control board for controlling the entire device, the storage device 40, and the like, and the operation of the fuel cell are controlled. Various sensors used for this are also arranged.

In the fuel cell apparatus 100 having the above-described configuration, the exhaust gas discharged from the fuel cell module 1 and the water flowing in the heat exchanger 3 are the heat exchangers 3 arranged adjacent to the fuel cell module 1. Heat is exchanged with the heat medium (fuel filler) of the above, and the water contained in the exhaust gas condenses to generate condensed water. The generated condensed water is separated by a gas-liquid separator or the like, and is introduced into the reforming water tank 6 that collects and stores the condensed water via the condensed water flow path C.

The exhaust gas from which the water has been removed is exhausted to the outside of the fuel cell device via the exhaust gas flow path E. Further, the reformed water stored in the reformed water tank 6 is supplied to the reformer 12 in the fuel cell module 1 via the reformed water flow path R and the reformed water pump P1, and the reformed water is used. It is used for steam reforming of raw materials and fuels.

FIG. 2 is an enlarged view of a portion (inside the alternate long and short dash line F in FIG. 1) related to the water self-sustaining operation of the fuel cell and the reformed water used thereof in the configuration of the fuel cell device 100. ..

The reformed water tank 6 for purifying and storing condensed water is composed of a first reformed water tank 61 for purification treatment and a second reformed water tank 62 for storage. The first reforming water tank 61 and the second reforming water tank 62 are connected by a lower water pipe 65 and an upper ventilation pipe 66 and communicate with each other. The configuration of the reforming water tank 6 is not limited to the above configuration, and for example, the first reforming water tank 61 and the second reforming water tank 62 may be integrated.

A reforming water outlet 62a connected to a suction port of the reforming water pump P1 is provided at the lower part or the bottom of the second reforming water tank 62 for storing the generated reforming water. Further, on the upper side surface of the second reforming water tank 62, a surplus water outlet 62b connected to the suction port of the drainage pump P2 is provided. _{A water detector WL 2} for detecting that the water level (water surface) of the stored reformed water has reached the full water level, which is the upper limit water level, is arranged at a position above the surplus water outlet 62b. Has been done. The second reforming water tank 62 may be provided with a water detector for detecting the lower limit water level. The black circles of each sensor in the figure indicate the position where the sensor is arranged or the position where the tip of the probe or the like is detected (the same applies hereinafter).

The first reformed water tank 61 for collecting and purifying the condensed water to produce the reformed water is filled with an ion exchange resin for purifying the condensed water recovered from the heat exchanger 3. The ion exchange resin container 63 of No. 1 and the second ion exchange resin container 64 filled with an ion exchange resin for purifying tap water or the like (hereinafter referred to as replenishment water) replenished from the outside when the reforming water is insufficient. Is arranged. _{Further, at the lower part of the first reforming water tank 61, a water detector WL 1} for detecting that the water level (surface water surface) of the stored reforming water has reached the drought level, which is the lower limit water level, is arranged. ing.

Then, the first reforming water tank 61 is replenished from the outside with _{an electric conductivity meter WC 1} for measuring the conductivity (μS / cm) of the condensed water flowing into the reforming water tank 6, and is purified. _{An electric conductivity meter WC 2} for measuring the conductivity (μS / cm) of the replenished water after the condensation is provided.

In the fuel cell device 100 of the present embodiment, the above-mentioned electric conductivity meter WC ₁ is arranged in the condensed water flow path C between the heat exchanger 3 and the reforming water tank 6. That is, this electric conductivity meter WC ₁ does not measure the electric conductivity of the water stored in the reforming water tank 6 as in the conventionally known electric conductivity meter, but stores the water in the reforming water tank 6. It is arranged at a position where the conductivity can be measured at the time before it is made. Specifically, the electric conductivity meter WC ₁ may be arranged between the heat exchanger 3 in the condensed water flow path C and the outlet of the first ion exchange resin container 63.

With this configuration, in the fuel cell device 100 of the present embodiment, water such as tap water containing a large amount of impurities, which is used as a heat medium (refrigerator) of the heat exchanger 3, leaks due to corrosion of the pipe and condenses. even when mixed in water or condensate water channel C, the rise of the measured conductivity in the electric conductivity meter WC _1, leakage or contamination of the heat medium generated from the electric conductivity meter WC ₁ on the upstream side, immediately Can be detected.

_{The electric conductivity meter WC 2} on the side of the second ion exchange resin container 64 can be used to measure the conductivity (μS / cm) of the deionized water after passing through the ion exchange resin. It is arranged on the upper part of the second ion exchange resin container 64 that stays. Thereby, the replacement time of the second ion exchange resin container 64 can be easily determined. Further, when measuring the conductivity of the stored water in the first reforming water tank 61, a new electric conductivity meter different from these two electric conductivity meters is installed in the first reforming water tank 61. It may be provided in the water storage section of.

Further, the electric conductivity meter WC ₁ can be provided between the heat exchanger 3 in the condensed water flow path C and the inlet of the first ion exchange resin container 63. In this case, leakage or contamination of the heat medium can be detected immediately before the purification treatment in the first ion exchange resin container 63. Furthermore, the operation of the fuel cell device can be appropriately controlled based on the value measured by the electric conductivity meter WC _1. Along with this, it is possible to suppress the treatment of water such as tap water containing a large amount of impurities with the first ion exchange resin 63, so that deterioration of the ion exchange resin filled in the first ion exchange resin container 63 can be suppressed. can.

As a result, for example, when the conductivity _{measured by the electric conductivity meter WC 1} continues to exceed a predetermined value for a predetermined time, the control device 30 of the fuel cell device 100 changes the fuel cell module 1. It is possible to determine that there is a high possibility that a failure or damage will occur in the cell stack 11 or the like, and stop the power generation operation and operation thereof.

Next, a specific configuration example of the reforming water tank 6 will be described.
FIG. 4 is an exploded perspective view of the reformed water tank 6 used in the fuel cell device of the embodiment, and FIG. 5 is a sectional view thereof. In addition, in FIGS. 4 and 5, only the first reforming water tank 61 side for collecting and purifying the condensed water to prepare the reforming water is described, and the description of the second reforming water tank 62 is omitted. is doing.

As shown in the exploded perspective view of FIG. 4, the first reforming water tank 61 includes a tank-shaped water storage unit 71 which is a tank body, and the first ion exchange resin container 63 and the second ion described above. It includes an ion exchange resin cartridge 72 in which the exchange resin container 64 is integrally molded, and a lid portion 73 that covers the tank-shaped water storage portion 71. In FIG. 4, each ion exchange resin for treating condensed water and purifying external water (tap water) filled in the ion exchange resin cartridge 72 is not shown.

As shown in the exploded perspective view, the water storage unit 71 is a bottomed box-shaped container whose upper surface has a large opening as an opening 71a. The concave space inside is a box-shaped portion 71b for storing the reformed water after treatment and purification, and as shown in the cross-sectional view of FIG. 5, the ion exchange resin cartridge 72 is fitted and attached to the inside. In this case, the gap between the ion exchange resin cartridge 72 and the water storage unit 71 is a space in which the reformed water after the purification treatment can be stored.

The ion exchange resin cartridge 72 can be easily removed from the upper surface opening 71a with respect to the water storage portion 71 described above. That is, with this configuration, the fuel cell device of the present embodiment can easily attach / detach the ion exchange resin cartridge 72 filled with the ion exchange resin. Therefore, the fuel cell device of the present embodiment can be made excellent in maintainability.

Further, on the front side of the water storage unit 71, an external water receiving port 71c for receiving tap water or the like supplied from the water supply or the like into the container is provided. And, on the inner back side, there is an extension pipe 71d for communicating between the external water receiving port 71c and the external water introduction port 72b provided at the bottom of the second ion exchange resin container 64. It is arranged. In the figure, reference numeral 71e indicates an opening of the water pipe 65, and reference numeral 71f indicates an opening of the ventilation pipe 66.

In the present embodiment, the ion exchange resin cartridge 72 is divided into two blocks by a partition portion (partition wall) in the middle thereof. The relatively large and deep fraction on the left side of FIGS. 4 and 5 is the first ion exchange resin container 63, and the relatively small and shallow fraction on the right side of the drawing is the second ion exchange resin container 64. The ion exchange resin cartridge 72 is integrally molded using a resin or the like. Further, the container 63 and the container 64 may be separately detachable and detachable separately without integrating the ion exchange resin cartridge 72.

The first ion exchange resin container 63 on the left side of the drawing is a portion where the "condensed water" recovered from the heat exchanger 3 of the fuel cell module 100 mainly flows. The inside is filled with an ion exchange resin (21A, not shown in FIG. 4) for treating condensed water. The bottom (bottom surface) of the first ion exchange resin container 63 is provided with a treated water outlet 72a for flowing purified water (modified water) treated with the ion exchange resin 21A toward the water storage unit 71. Has been done.

Further, the second ion exchange resin container 64 on the right side of the drawing is for purifying external water such as tap water introduced from the external water introduction port 72b at the bottom, which was described above. The inside is filled with an ion exchange resin (21B, not shown in FIG. 4) for purifying external water. Further, in the second ion exchange resin container 64, tap water flowing in from below flows upward, and the treated purified water overflows from the purified water outlet 72c provided at the upper part. It is designed to flow down or drip toward the water storage unit 71.

The lid portion 73 of the first reforming water tank 61 is formed in a size that covers the entire surface of the upper surface opening 71a of the water storage portion 71 that has a large opening. In the lid portion 73, a condensed water introduction port 74 into which the condensed water recovered from the heat exchanger 3 flows, each perforation 73a used for screwing the lid portion 73, the above-mentioned electric conductivity meter WC 1 and the _{above-mentioned electric conductivity meter WC 1 and the above-mentioned electric conductivity meter WC 1.} Mounting holes 75A and 75B for mounting the electric conductivity meter WC _{2 are provided, respectively.} Since the lid portion 73 is fastened with screws or the like, it can be easily removed during maintenance.

Then, as shown in these figures, in the reforming water tank 6 of the fuel cell apparatus of the present embodiment, the condensed water collected inside the first ion exchange resin container 63 and recovered from the heat exchanger 3 is contained. The condensed water before purification treatment is received at the position between the flowing condensed water introduction port 74 and the ion exchange resin 21A for condensing water treatment (not shown in FIG. 4), that is, directly under the condensed water introduction port 74. A saucer-shaped condensed water storage unit 76 is arranged at a position where it can be used. As a result, the condensed water that has flowed into the first ion exchange resin container 63 can be temporarily stored before the purification treatment.

As shown in the cross-sectional view of FIG. 5, the above-mentioned electric conductivity meter WC ₁ can measure the conductivity of untreated condensed water in the condensed water storage portion 76 by the tip of the probe, which is the measurement site thereof. As such, it is immersed in the condensed water in the condensed water storage portion 76.

Further, on the side surface of the condensed water storage unit 76, a condensed water outlet 76a is provided so that the condensed water stored in the condensed water storage unit 76 overflows and flows down toward the ion exchange resin 21A below. There is. With this configuration, the condensed water once stored in the condensed water storage unit 76 before the purification treatment can be flowed down to the ion exchange resin 21A immediately after the measurement of the conductivity is completed, and the purification treatment can be performed.

Further, the saucer-shaped condensed water storage unit 76 is fitted above the first ion exchange resin container 63 through the opening 71a on the upper surface of the water storage unit 71, with respect to the first ion exchange resin container 63. It can be easily attached and detached. Further, the ease of attachment / detachment of the ion cartridge 72 filled with the ion exchange resin is not hindered.

Even with the above configuration, the increase in conductivity measured _{by the electric conductivity meter WC 1} arranged in the condensed water storage section 76 causes the upstream side of the condensed water flow from the _{electric conductivity meter WC 1, that is, the condensed water flow path.} Leakage or contamination of the heat medium generated on the C side or the heat exchanger 3 side can be immediately detected. Therefore, even when water such as tap water containing a large amount of impurities, which is used as the heat medium (refrigerant) of the heat exchanger 3, leaks due to corrosion of the piping or the like and is mixed in the condensed water or the condensed water flow path C. It will be possible to take measures quickly.

If the first reforming water tank 61 does not require external water, for example, it is not necessary to provide the second ion exchange resin container 64 inside the first reforming water tank 61, and the inside of the first reforming water tank 61 , The structure may include only the first ion exchange resin container 63. Further, even when external water is required, the second ion exchange resin container 64 may be provided outside the first reforming water tank 61.

Next, the operation control of the fuel cell device using the _{electric conductivity meter WC 1} capable of detecting the mixing of the heat medium leaked from the heat exchanger 3 into the reformed water will be described.

The fuel cell device 100 of the present embodiment includes a fuel cell module 1 and a control device including at least one processor in order to provide control and processing power for performing various functions as described in detail below. 30 is provided.

According to various embodiments, the at least one processor may be run as a single integrated circuit or as multiple communicable integrated and / or discrete circuits. At least one processor can be run according to a variety of known techniques.

In one embodiment, the processor comprises, for example, one or more circuits or units configured to perform one or more data calculation procedures or processes by performing instructions stored in the associated memory. In other embodiments, the processor may be firmware (eg, a discrete logic component) configured to perform one or more data calculation procedures or processes.

According to various embodiments, the processor is one or more processors, controllers, microprocessors, microcontrollers, application-specific integrated circuits, digital signal processors, programmable logic devices, field programmable gate arrays, or devices thereof or Any combination of configurations, or other known device and configuration combinations, may be included to perform the functions described below.

The control device 30 includes a storage device 40, a power conditioner 20, a fuel cell module 1, a raw fuel supply device (gas pump B1), an oxygen-containing gas supply device (air blower B2), and a water supply device (modified). Quality water pump P1), water replenishment device (water replenishment flow path including water stop valve), water level detector (water detector WL ₁ , WL ₂ ), water quality measurement device (electric conductivity meter WC ₁ , WC ₂₎ ), Etc., and controls and manages the entire fuel cell device 100, including each of these functional units.

Further, the control device 30 acquires a program stored in the storage device 40 and executes this program to realize various functions related to each part of the fuel cell device 100. When the control device 30 transmits a control signal or various information to another functional unit (device), the control device 30 and the other functional unit may be connected by wire or wirelessly.

The storage device 40 can store programs and data. The storage device 40 may also be used as a work area for temporarily storing the processing result. The storage device 40 includes a recording medium. The recording medium may include any non-transitory storage medium such as a semiconductor storage medium and a magnetic storage medium. Further, the storage device 40 may include a plurality of types of storage media. The storage device 40 may include a combination of a portable storage medium such as a memory card, an optical disk, or a magneto-optical disk, and a storage reading device. The storage device 40 may include a storage device used as a temporary storage area such as a RAM (Random Access Memory).

The fuel cell device 100 having the above configuration is programmed to constantly measure the conductivity of condensed water by the _{electric conductivity meter WC 1 during operation (power generation operation) and constantly monitor whether the value is abnormal or not.} ing.

Specifically, normally, during the operation (power generation operation) of the fuel cell device 100, when the condensed water generated in the heat exchanger 3 is collected in the reforming water tank 6 via the condensed water flow path C. Condensed water before purification treatment is temporarily stored in the condensed water storage unit 76 provided in the condensed water flow path C, and the electric conductivity meter WC ₁ arranged in the condensed water storage unit 76 is used to obtain the conductivity of the condensed water (condensed water storage unit 76). μS / cm) is measured.

At this time, if the conductivity of the condensed water does not exceed a predetermined value, the control device 30 determines that the fuel cell device 100 is in a normal operating state, and continues its power generation operation and operation. On the other hand, when it is continuously detected for a predetermined time that the conductivity exceeds a predetermined value, the control device 30 leaks the heat medium from the heat exchanger 3 or heats the condensed water in the condensed water flow path C. Judging that it is an abnormal state in which a medium is mixed, the power generation operation and operation are stopped.

By the way, at the first start-up after the production of the fuel cell device 100 is completed, impurities originally present in the fuel cell module 1 or the heat exchanger 3 flow out together with the "first reservoir" of the condensed water. In some cases, the conductivity may increase. Therefore, the control device 30 starts measuring the conductivity of the condensed water by the _{electric conductivity meter WC 1} after a predetermined first predetermined time has elapsed at the first start-up after the production of the fuel cell device 100 is completed. Perform control. Thereby, it is possible to avoid the measurement of the abnormal value of the conductivity due to the initial storage and to avoid the abnormal stop of the fuel cell device 100 due to the initial storage. Further, the fuel cell device 100 can reduce the number of times the fuel cell device is stopped due to an abnormal value of the conductivity of condensed water.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various changes and improvements can be made without departing from the gist of the present invention. be.

For example, the cell stack 11 is not limited to SOFC, but is a solid polymer fuel cell (PEFC), a phosphoric acid fuel cell (PAFC), and a molten carbonate fuel cell. It may be composed of a fuel cell such as a fuel cell [Molten Carbonate Fuel Cell (MCFC)].

Further, the control device and the storage device of the fuel cell device can be realized as a configuration provided outside the fuel cell device. Further, it can be realized as a control method including a characteristic control step in the control device according to the present disclosure, or as a control program for causing a computer to execute the above steps.

1 Fuel cell module 21A, 21B Ion exchange resin 30 Control device 6 Remodeling water tank 61 1st reforming water tank 62 2nd reforming water tank 63 1st ion exchange resin container 64 2nd ion exchange resin container 71 Water storage Part 76 Condensed water storage part 100 Fuel cell device C Condensed water flow path R Remodeling water flow path P1 Remodeling water pump WC _m Electric conductivity meter

Claims (6)

A fuel cell module having a fuel cell and a reformer for steam reforming raw fuel,
A heat exchanger that exchanges heat between the exhaust gas discharged from the fuel cell module and the heat medium for cooling the exhaust gas.
A reformed water tank that stores condensed water in which the water in the exhaust gas is condensed, which is generated by cooling the exhaust gas, as reformed water for steam reforming.
A condensed water flow path that allows the condensed water generated by the heat exchanger to flow through the reformed water tank, and
The electric conductivity meter for measuring the conductivity of the condensed water is provided.
The electric conductivity meter is arranged between the heat exchanger and the reformed water tank in the condensed water flow path .
It has an ion exchange resin that purifies the condensed water, and the condensed water that has passed the ion exchange resin is stored in the reformed water tank.
The condensed water flow path is provided with a condensed water storage unit for storing the condensed water.
The ion exchange resin is disposed in the reformed water tank.
The condensed water storage unit is a fuel cell device disposed above the ion exchange resin in the reformed water tank. Before Symbol electrical conductivity meter, said and the heat exchanger in the condenser water flow path is disposed between the ion-exchange resin, the fuel cell system according to claim 1. Before Symbol electrical conductivity meter is disposed in the condensed water reservoir, a fuel cell system according to claim 1 or 2. Before SL condensate reservoir includes a condensate discharging port to flow down toward the condensed water overflowed from the condensed water reservoir to the ion exchange resin, the fuel cell system according to claim 1. The reformed water tank includes an ion exchange resin container for accommodating the ion exchange resin and a reformed water storage container for storing the reformed water purified in the ion exchange resin container.
The reformed water storage container is a bottomed container having an open upper surface.
The ion exchange resin container is disposed inside the reformed water storage container so as to be removable from the opening on the upper surface of the reformed water storage container with a space between the modified water storage container and the reformed water storage container. Ori,
The condensed water reservoir from the opening of the upper surface of the reforming water reservoir, wherein fitted into the upper part of the ion-exchange resin container is detachable with respect to the ion exchange resin container according to claim 1 Fuel cell device. A fuel cell device including a control device for controlling the operation of the fuel cell module and its associated auxiliary equipment.
Any of claims 1 to 5, wherein the control device executes control for measuring the conductivity of condensed water by the electric conductivity meter after a predetermined first predetermined time has elapsed at the time of the first start-up. The fuel cell device according to one.

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