JP5606165B2 - Cell stack device, fuel cell module and fuel cell device - Google Patents

Description

  The present invention relates to a cell stack device, a fuel cell module, and a fuel cell device including a reformer for generating fuel gas supplied to a fuel cell.

  In recent years, as a next generation energy, a fuel cell (hydrogen-containing gas) and air (oxygen-containing gas) are used, and a cell stack in which a plurality of fuel cells that can obtain electric power are arranged and supplied to the cell stack Various cell stack devices including a reformer for generating fuel gas to be produced and fuel cell modules in which the cell stack devices are housed in a housing container have been proposed (for example, see Patent Document 1). .

  In Patent Document 1, a reformer having a vaporization section for vaporizing raw fuel and a reforming section for reforming raw fuel gas sent from the vaporization section is disposed above the cell stack. Has been. The reformer shown in Patent Document 1 has a structure in which the vaporization section and the reforming section are juxtaposed in contact with each other.

JP 2007-59377 A

  However, in the above-described cell stack device of Patent Document 1, since the vaporization section and the reforming section are juxtaposed with each other, raw fuel having a low temperature is supplied to the vaporization section, and the temperature of the vaporization section decreases. In this case, due to the endothermic reaction generated in the vaporization section, the temperature of the reforming section is lowered, the reforming reaction cannot be performed efficiently, and the possibility that the reforming efficiency is lowered increases. In addition, this increases the possibility that the power generation efficiency of the cell stack device is reduced.

The cell stack device of the present invention includes a cell stack in which a plurality of fuel cells that generate power using fuel gas and oxygen-containing gas are arranged, and raw fuel supplied from the outside into raw fuel gas whose temperature has been increased. And a reformer for reforming the raw fuel gas supplied from the vaporizer into the fuel gas. The evaporator and the reformer, the extending respectively along the arrangement direction of the fuel cell, the raw fuel inlet is provided in which the raw fuel at one end is supplied in the arrangement direction of the fuel cell of the vaporizer And the vaporizer is disposed at a distance from the reformer and the cell stack, and is a position facing the raw fuel inlet of the vaporizer and the arrangement direction of the fuel cells, A fuel gas delivery port for supplying the fuel gas to the fuel cells constituting the cell stack is provided at the other end of the reformer in the arrangement direction of the fuel cells, and the reformer comprises the It arrange | positions so that it may be located between a vaporizer and the said cell stack.

  The fuel cell module of the present invention stores the cell stack device described above in a storage container.

  In the fuel cell device of the present invention, the fuel cell module described above and an auxiliary device for operating the cell stack device are housed in an outer case.

According to the cell stack device of the present invention, a reduction in reforming efficiency can be reduced and a cell stack device with improved power generation efficiency can be obtained. Further, the fuel cell module of the present invention can improve the power generation efficiency because the cell stack device is housed in the housing container. Further, the fuel cell device of the present invention can improve the power generation efficiency because the fuel cell module and the auxiliary device for operating the cell stack device are housed in the outer case.

It is a perspective view which shows one Embodiment of the cell stack apparatus of this invention. It is a perspective view which shows the cell stack apparatus of other embodiment of this invention. It is a perspective view which shows the cell stack apparatus of further another embodiment of this invention. It is a perspective view which shows the cell stack apparatus of further another embodiment of this invention. It is an external appearance perspective view which decomposes | disassembles and shows one Embodiment of the fuel cell module of this invention. It is a disassembled perspective view which shows one Embodiment of the fuel cell apparatus of this invention.

  The cell stack device 1 shown in FIG. 1 has a current collecting member (not shown) disposed between a plurality of fuel cells 2 each having a fuel gas flow path (not shown). The cell stack 3 is electrically connected in series, and one end of the fuel cell 2 constituting the cell stack 3 is fixed to the manifold 4 for supplying fuel gas to the fuel cell 2 with an insulating adhesive. The first reformer 6a and the second reformer 6b are juxtaposed on the other end side of the fuel battery cell 2 apart from the other end of the fuel battery cell 2, and the first reformer 6a and the second reformer 6a are arranged side by side. 2 A vaporizer 7 is arranged above the reformer 6b.

  The fuel gas feed of the second reformer 6b is fed to a fuel gas inlet 17 provided at an end portion along the arrangement direction of the fuel cells 2 of the manifold 4 (hereinafter sometimes abbreviated as the cell arrangement direction). A fuel gas supply pipe 8 connected to the outlet 14 is provided. Here, the end of the manifold 4 along the arrangement direction of the fuel cells 2 refers to the space from the end of the cell stack 3 to the end of the manifold 4 and the arrangement of the fuel cells 2 in the side surface of the manifold 4. It means the side that intersects the direction. At both ends of the cell stack 3, conductive members 5a having current extraction portions 5b for collecting the current generated by the power generation of the fuel cell 2 and drawing it to the outside are arranged.

  A raw fuel inlet 16 to which raw fuel is supplied is provided at one end of the carburetor 7 in the cell arrangement direction, and the raw fuel supply pipe 9 is connected to the raw fuel inlet 16. The other end of the vaporizer 7 in the cell arrangement direction is connected to the first reformer 6a disposed between the vaporizer 7 and the cell stack 3 via the connecting pipe 10, and the first reformer 6a. And the second reformer 6b are connected to each other through the connecting pipe 10. In addition, although the example which connected the vaporizer | carburetor 7, the 1st reformer 6a, and the 2nd reformer 6b with the prismatic connection pipe 10 was shown, these are connected so that raw fuel or raw fuel gas may not leak. What is necessary is just to connect by the cylindrical connection pipe 10.

  Here, the fuel battery cell 2 has a hollow flat plate shape having a fuel gas flow path through which fuel gas (hydrogen-containing gas) flows from one end to the other end in the longitudinal direction of the fuel battery cell 2. A solid oxide fuel cell 2 in which a fuel-side electrode layer, a solid electrolyte layer, and an oxygen-side electrode layer 2a are provided in this order is illustrated. Although not shown in the figure, it is sufficient that there is at least one fuel gas channel, and a plurality of fuel gas channels may be provided. In addition, the code | symbol 2a in FIGS. 1-4 shows the oxygen side electrode layer 2a.

The cell stack device 1 has a configuration in which the fuel cell 2 burns fuel gas that has not been used for power generation of the fuel cell 2 at the other end (hereinafter may be abbreviated as surplus fuel gas). Has been. Thereby, the temperature of the reformer 6 (the first reformer 6a and the second reformer 6b) described later can be increased efficiently. Hereinafter, unless otherwise indicated, the description will be made using the cell stack 3 including the fuel battery cell 2 configured to burn excess fuel gas at the other end of the fuel battery cell 2.

  In the cell stack apparatus 1, raw fuel is supplied from the raw fuel supply pipe 9 via the raw fuel inlet 16 and is heated in the carburetor 7 while flowing in the carburetor 7 along the cell arrangement direction ( The raw fuel gas is vaporized) and supplied to the raw fuel gas inlet 13 provided at one end of the first reformer 6a through the connecting pipe 10 from the raw fuel gas outlet 12. The raw fuel gas flows to the other end of the first reformer 6a while being reformed into fuel gas by a reforming catalyst (not shown) provided inside. The fuel gas that has flowed through the first reformer 6a or the raw fuel gas that has not been reformed flows into one end of the second reformer 6b via the connecting pipe 10, and is provided inside the second reformer 6b. The reformed catalyst is reformed into fuel gas. The fuel gas that has flowed through the second reformer 6b flows from the fuel gas delivery port 14 provided at the other end of the second reformer 6b through the fuel gas supply pipe 8, and the fuel gas flow provided in the manifold 4 It is supplied to the manifold 4 through the inlet 17 and supplied to each fuel cell 2 constituting the cell stack 3.

  Examples of the raw fuel include hydrocarbon gas such as city gas and liquid fuel such as kerosene. When gaseous fuel such as hydrocarbon gas is used as raw fuel, the raw fuel gas means hydrocarbon gas, and the hydrocarbon gas supplied as raw fuel is warmed in the vaporizer 7. Then, the hydrocarbon-based gas whose temperature has risen is supplied to the reformer 6 (first reformer 6a) as raw fuel gas.

  The carburetor 7 is formed of a cylindrical tubular body, and is disposed on the other end side (above the cell stack 3) of the fuel cell 2 along the cell arrangement direction. A raw fuel gas outlet 12 is provided at the end. And it heats with the combustion heat (henceforth abbreviated combustion heat) which burned the excess fuel gas. In addition, by filling the inside of the carburetor 7 with ceramic balls or the like, the contact area between the raw fuel and the carburetor 7 can be increased, and the temperature of the raw fuel can be efficiently increased while flowing through the carburetor 7. Raised raw fuel gas can be used. Therefore, the raw fuel gas whose temperature has risen is supplied to the reformer 6 (first reformer 6a), and the reformer 6 can perform an efficient reforming reaction. In addition, by mixing ceramic balls or the like, mixing of raw fuel (raw fuel gas) with water vapor or the like can be promoted.

  The first reformer 6a and the second reformer 6b are arranged along the cell arrangement direction so as to be positioned between the vaporizer 7 and the cell stack 3, and raw fuel is provided at one end of the first reformer 6a. A gas inlet 13 is provided, and a fuel gas outlet 14 is provided at the other end of the second reformer 6b. The first reformer 6a and the second reformer 6b are heated by the combustion heat, and the reforming reaction can be performed efficiently.

  Even when the fuel cell 2 is configured not to burn surplus fuel gas, the power generation reaction of the solid oxide fuel cell device is an exothermic reaction, so the reforming is performed by the reaction heat of the solid oxide fuel cell. The heater 6 (first reformer 6a, second reformer 6b) and the vaporizer 7 can be warmed. Further, since the power generation temperature range of the solid oxide fuel cell device is as high as 600 ° C. to 1000 ° C., this embodiment can be used effectively. In addition, what is necessary is just to produce an exothermic reaction at the time of operation of a fuel cell device, and it can use for a molten carbonate fuel cell and a phosphoric acid fuel cell besides a solid oxide fuel cell.

As a method of reforming raw fuel gas to generate fuel gas (hydrogen-containing gas), a steam reforming method that reforms with steam and raw fuel, a partial oxidation reforming method that reforms with air and raw fuel, A combined reforming method combining these two (autothermal reforming method) can be mentioned. As a characteristic of these reforming methods, steam reforming includes reacting raw fuel gas and steam at 400 ° C. to 800 ° C., and that the reforming reaction is an endothermic reaction. Hereinafter, unless otherwise specified, reforming means that water is supplied to the vaporizing chamber 7 and the raw fuel is reformed into fuel gas by the steam reforming method. In this case, the raw fuel supply pipe 9 may be a double pipe as shown in FIG. 1 and water may be supplied to the vaporizer 7.

  Here, in the reformer 6 that performs steam reforming, since the vaporization of water is a large endothermic reaction, the temperature of the vaporizer 7 for vaporizing water may decrease. Furthermore, when the carburetor 7 is disposed immediately above the cell stack 3, the temperature of the fuel cell 2 located below the carburetor 7 may be lowered, and the possibility that the power generation efficiency may be reduced may increase.

  In the cell stack apparatus 1, since the vaporizer 7 is disposed at a distance from the cell stack 3 and the reformer 6 is disposed between the vaporizer 7 and the cell stack 3, A reformer will be arrange | positioned under the vaporizer 7, and it can reduce that the temperature of the fuel cell 2 arrange | positioned under the vaporizer 7 falls.

  Further, in the cell stack device 1, the vaporizer 7 and the reformer 6 (the first reformer 6a and the second reformer 6b) are arranged with a space therebetween. Therefore, the reformer 6 (the first reformer 6a, the second reformer) which is separate from the vaporizer 7, even when the raw fuel having a low temperature is supplied to the vaporizer 7 or when water is supplied. The temperature drop of the mass device 6b) can be reduced, and the reforming reaction can be performed efficiently.

  Further, since the vaporizer 7 and the reformer 6 (the first reformer 6a and the second reformer 6b) are configured as separate bodies, the vaporizer 7, the first reformer 6a, and the first reformer The respective surface areas of the two reformers 6b can be increased, and the vaporizer 7 and the reformer 6 (the first reformer 6a and the second reformer 6b) can be efficiently warmed by the combustion heat. it can.

  In the cell stack 1 shown in FIG. 1, a vaporizer 7, a first reformer 6a, and a second reformer 6b are provided along the cell arrangement direction. The reformers 6 (the first reformer 6a and the second reformer 6b) are arranged so as to be juxtaposed in plan view so as to cover the upper surface of the cell stack 3, and above the fuel cell 2 A vaporizer 7 is disposed at the center in the width direction. As a result, the combustion gas (exhaust gas) generated by the combustion of the surplus fuel gas flows efficiently without staying in the vicinity of the first reformer 6a and the second reformer 6b, so that the power generation efficiency of the cell stack device 1 is improved. Can be made.

  In the cell stack device 1, the raw fuel, the raw fuel gas, and the fuel gas that flow through the vaporizer 7 and the reformer 6 (the first reformer 6 a and the second reformer 6 b) It flows while folding the end side (above the cell stack 3) along the cell arrangement direction. Thereby, combustion heat is efficiently supplied to the raw fuel, the raw fuel gas, and the fuel gas, efficient vaporization and reforming reaction can be performed, and the cell stack device 1 with improved power generation efficiency can be obtained.

  Further, the reformer 6 (first reformer 6a, second reformer 6b) is located between the cell stack 3 and the vaporizer 7, and is disposed so as to cover the upper surface of the cell stack 3. Therefore, the distance between the vaporizer 7 having a low temperature and the cell stack 3 can be sufficiently secured, and a decrease in the temperature of the fuel cell 2 disposed below the vaporizer 7 can be reduced.

  Furthermore, the power generation efficiency of the cell stack device 1 can be improved by utilizing the combustion heat generated by the combustion of the surplus fuel gas in a reforming reaction that mainly requires a heat quantity.

  Further, since the first reformer 6a and the second reformer 6b are juxtaposed, the cell stack device 1 can be reduced in size, and a compact fuel cell device can be obtained. Note that juxtaposition means that the first reformer 6a and the second reformer 6b are located at the same height when viewed from the cell arrangement direction.

  Further, by disposing the vaporizer 7 above the juxtaposed first reformer 6a and the second reformer 6b, the exhaust gas generated by the combustion is converted into the first reformer 6a and the second reformer. It is possible to efficiently conduct the combustion heat to the vaporizer 7 by flowing between it and the evaporator 6b.

  Further, since the vaporizer 7, the first reformer 6a, and the second reformer 6b have a cylindrical shape, the mechanical strength and the strength against thermal stress can be improved, and the vaporizer 7 has a temperature. Even when raw fuel or water with a low level is supplied, the possibility of the vaporizer 7 being damaged can be reduced. The same applies to the reformer 6 (first reformer 6a, second reformer 6b).

  Further, since the raw fuel inlet 16 is provided at one end of the carburetor 7 in the cell arrangement direction, the raw fuel flows along the cell arrangement direction and is then supplied to the reformer 6 as raw fuel gas. As a result, the supply of raw fuel to the reformer 6 can be reduced.

  As the reforming catalyst 15 provided inside the reformer 6 (first reformer 6a, second reformer 6b), it is preferable to use a reforming catalyst excellent in reforming efficiency and durability, For example, a reforming catalyst in which a noble metal such as Ru or Pt or a base metal such as Ni or Fe is supported on a porous carrier such as γ-alumina, α-alumina or cordierite can be used.

  Moreover, although the example provided with the 1st reformer 6a and the 2nd reformer 6b was shown in the cell stack apparatus 1, you may provide only the 1st reformer 6a. Even in that case, since the vaporizer 7 and the reformer 6 are provided as separate bodies, even when the raw fuel having a low temperature is supplied to the vaporizer 7, the temperature of the reformer is reduced. The power generation performance of the cell stack device 1 can be improved.

  Although the example in which the vaporizer 7 and the reformer 6 (the first reformer 6a and the second reformer 6b) are provided above the cell stack 3 is shown, they may be provided on the side of the cell stack. . Even in such a case, the reforming can be performed efficiently by the radiant heat from the cell stack 3 in which the fuel cells 2 that serve as heating elements during power generation are arranged.

  Next, a cell stack apparatus 11 according to another embodiment of the present invention will be described with reference to FIG. In the following drawings, the same members as those of the cell stack device 1 according to the embodiment of the present invention are denoted by the same reference numerals.

  In the cell stack device 11, the vaporizer 7, the first reformer 6a and the second reformer 6b are prismatic, and the first reformer 6a is disposed above the second reformer 6b. However, unlike the cell stack device 1, the other points are the same as those of the cell stack device 1.

  As shown in FIG. 2, the vaporizer 7, the first reformer 6a, and the second reformer 6b have a prismatic shape. Therefore, the internal capacities of the vaporizer 7 and the reformer 6 (the first reformer 6a and the second reformer 6b) can be increased.

  Here, when the raw fuel is supplied, the raw fuel gas whose temperature has been increased in the carburetor 7 is supplied to the first reformer 6a, but the temperature of the raw fuel gas flowing through the carburetor 7 is low. There is a possibility that the temperature of the fuel battery cell 2 disposed below the raw fuel gas inlet 13 may be lowered.

  In the cell stack apparatus 11, since the first reformer 6a is located closer to the cell stack 3 than the vaporizer 7 and above the second reformer, the raw fuel gas having a low temperature is changed to the first reformer. Even if it is a case where it supplies to the mass device 6a, the fall of the temperature of the fuel cell 2 arrange | positioned under the raw fuel gas inflow port 13 can be reduced.

  Furthermore, even when the reforming is not sufficiently performed in the first reforming unit 6a, the second reformer 6b is disposed on the cell stack 3 side with respect to the first reformer 6a. The raw fuel gas that has not been reformed by the reformer 6a can be efficiently reformed into fuel gas. As a result, a sufficient amount of fuel gas can be supplied to the manifold 4, a sufficient amount of fuel gas can be supplied to the fuel cells 2 constituting the cell stack, and the power generation efficiency is improved. 11 can be used.

  In addition, since the first reformer 6a is disposed closer to the cell stack 3 than the vaporizer 7, the first reformer can be used even when raw fuel or water having a low temperature is supplied to the vaporizer 7. A decrease in temperature of the vessel 6a can be reduced.

  In the cell stack device 11, both the first reformer 6a and the second reformer 6b have a prismatic shape. For example, the cell stack device 11 is disposed closer to the cell stack 3 than the first reformer 6a and has the highest temperature. Only the second reformer 6b may be cylindrical, and the vaporizer 7 and the second reformer 6b may be prismatic.

  Next, a cell stack device 17 which is still another embodiment of the present invention will be described with reference to FIG.

  In the cell stack device 17 shown in FIG. 3, the vaporizer 7 has a flat plate shape and is provided so as to cover the upper surface of the cell stack 3. The manifold 4 is provided with two cell stacks 3a and 3b arranged side by side. The other points are the same as those of the cell stack device 1.

  The cell stack device 17 has two cell stacks 3a and 3b arranged in parallel, and one end portion of the fuel cell 2 constituting each cell stack 3a and 3b is fixed to the manifold 4 with an insulating adhesive. As illustrated, the cell stack 3a and the cell stack 3b are arranged in opposite directions, and one end of each of the cell stacks 3a and 3b (in FIG. 3, the raw fuel gas delivery port 12 side) is connected to a connecting member (see FIG. 3). The other ends of the cell stacks 3a and 3b (in FIG. 3, the raw fuel inlet 16 side) are electrically connected to the cell stacks 3a and 3b by the conductive members 5a1 and 5a2. Current is drawn to the outside.

  In the cell stack device 17, since the vaporizer 7 has a flat plate shape and is provided so as to cover the upper surface of the cell stack 3, combustion heat can be efficiently supplied (given) to the vaporizer 7. Even when there is a distance between the container 7 and the cell stack 3, the raw fuel can be efficiently converted into the raw fuel gas whose temperature has risen.

  In addition, in the cell stack apparatus 17, although the vaporizer 7 showed the example which is flat plate shape, the vaporizer 7 may not be flat plate shape, for example, may be elliptical column shape. Moreover, in order to supply combustion heat efficiently, unevenness etc. may be provided in the surface and the surface area of the vaporizer | carburetor 7 may be increased.

  Next, a cell stack device 18 which is still another embodiment of the present invention will be described with reference to FIG.

The cell stack apparatus 18 shown in FIG. 4 is connected to a water supply pipe 19 and is connected to a water vaporizer 20 for vaporizing (heating) water into steam and a raw fuel supply pipe 9 to increase the temperature of the raw fuel. The vaporizer 7, the first reformer 6a, and the second reformer for obtaining the raw fuel gas are joined by the connecting pipe 10 in this order. The reformer 6 is disposed on the other end side of the fuel battery cell 2, and the water vaporizer 20 is disposed on the opposite side of the reformer 6 from the cell stack 3 side and spaced apart from the reformer 6. The configuration is the same as that of the cell stack apparatus 1. In the description of FIG. 4, the first reformer 6 a and the second reformer 6 b will be described as the reformer 6.

  A cell stack device 18 shown in FIG. 4 supplies water to the water vaporizer 20 via the water supply pipe 19 and supplies raw fuel to the vaporizer 7 via the raw fuel supply pipe 9. The raw fuel is reformed into fuel gas.

  Since the cell stack device 18 includes the water vaporizer 20, the water supplied from the water supply pipe 19 can be sufficiently vaporized into water vapor and supplied to the reformer 6, thereby improving the reforming efficiency. Can do.

  Here, when a hydrocarbon liquid fuel (kerosene or the like) is used as the raw fuel, vaporization occurs when the raw fuel supply pipe 9 and the water supply pipe 19 are double pipes or when the raw fuel is supplied to the vaporizer 7 at the same time. There was a possibility that the temperature of the vessel 7 was lowered, water and liquid fuel as raw fuel could not be sufficiently vaporized, and the reforming catalyst (not shown) provided in the reformer 6 was deteriorated. Further, due to the deterioration of the reforming catalyst, the raw fuel gas that has not been reformed by the reformer 6 may be supplied to the fuel cell 2 and the fuel cell 2 may deteriorate.

  A cell stack device 19 shown in FIG. 4 is provided separately from a water vaporizer 20 that vaporizes water and a vaporizer 7 that vaporizes raw fuel, thereby allowing the reformer 6 to sufficiently vaporize water vapor and raw fuel gas. The reforming efficiency of the reformer 6 can be improved.

  Further, since the water vapor evaporated in the water vaporizer 20 further flows through the vaporizer 7 and is supplied to the reformer 6, the warmed water vapor can be supplied to the reformer 6, and further reforming is performed. Efficiency can be improved.

  Since the vaporizer 7 sufficiently mixes the water vapor and the raw fuel gas generated by vaporizing the raw fuel, the reformer 6 can perform a sufficient reforming reaction.

Moreover, although the example which connected the water vaporizer 20 by the raw fuel supply pipe 9 side of the vaporizer 7 was shown, it does not need to connect by the raw fuel supply pipe 9 side of the water vaporizer 20 and the vaporizer 7. FIG. In addition, although the example which connected the raw fuel supply pipe | tube 9 to the edge part of the vaporizer 7, and connected the water supply pipe | tube 19 to the edge part of the water vaporizer 20 was shown, the edge part of the vaporizer | carburetor 7 and the water vaporizer 19 is shown. The temperature distribution of the cell stack device 19 may be set as appropriate so that the temperature distribution of the cell stack device 19 is constant.

  Next, a fuel cell module 25 according to an embodiment of the present invention in which the cell stack device 1 according to an embodiment of the present invention is accommodated in a storage container 26 will be described with reference to FIG.

  Air introducing plates for supplying oxygen-containing gas to the fuel battery cell 2 are provided on both side surfaces inside the storage container 26, and the oxygen-containing gas heated in the storage container 26 is supplied to the fuel battery cell 2. Can be supplied.

  FIG. 5 shows a state in which a part (front and rear surfaces) of the storage container 26 is removed and the cell stack device 1 stored inside is taken out rearward. Here, in the fuel cell module 25 shown in FIG. 5, the cell stack device 1 can be slid and stored in the storage container 26.

  In such a fuel cell module 25, as described above, the fuel cell module 25 with improved power generation efficiency is configured by storing the cell stack device 1 with improved power generation efficiency in the storage container 26. Can do.

  Next, a fuel cell device according to an embodiment of the present invention, in which a fuel cell module 25 according to an embodiment of the present invention and an auxiliary machine (not shown) for operating the fuel cell module 25 are accommodated. 30 will be described with reference to FIG.

  The fuel cell device 30 shown in FIG. 6 divides the inside of an exterior case made up of a column 31 and an exterior plate 32 into upper and lower portions by a partition plate 33, and a module storage chamber 34 for storing the above-described fuel cell module 25 on the upper side. The lower side is configured as an auxiliary equipment storage chamber 35 for storing auxiliary equipment for operating the fuel cell module 25. In addition, the auxiliary machine accommodated in the auxiliary machine storage chamber 35 is abbreviate | omitted and shown.

  Further, the partition plate 33 is provided with an air circulation port 36 for flowing the air in the auxiliary machine storage chamber 35 toward the module storage chamber 34, and a part of the exterior plate 33 constituting the module storage chamber 34 An exhaust port 37 for exhausting the air in the module storage chamber 34 is provided.

  In such a fuel cell device 30, as described above, the fuel cell module 25 with improved power generation efficiency is stored in the module storage chamber 34, and an auxiliary machine for operating the fuel cell module 25 is an auxiliary device storage chamber 33. By being housed and configured, the fuel cell device 30 with improved power generation efficiency can be obtained.

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

  For example, an example in which the first reformer 6a and the second reformer 6b are juxtaposed is shown, but the second reformer 6b, the first reformer 6a, and the vaporizer 7 are arranged in this order above the cell stack. You may arrange in. Even in this case, the second reformer 6b, the first reformer 6a, and the vaporizer 7 are connected separately by the connecting pipe 10, so that the raw fuel having a low temperature is supplied to the vaporizer 7. Even in such a case, the reforming reaction can be performed efficiently, and a cell stack device with improved power generation efficiency can be obtained.

  Moreover, although the example which the 1st reformer 6a and the 2nd reformer 6b are the same magnitude | sizes was shown, the 1st reformer 6a may be larger than the 2nd reformer 6b, and small May be. What is necessary is just to set the magnitude | size of each member suitably according to the structure of a cell stack apparatus.

1, 11, 17, 18: cell stack device 2: fuel cell 3: cell stack 4: manifold 6: reformer 6a: first reformer 6b: second reformer 7: vaporizer 16: raw fuel Inlet 20: Water vaporizer 25: Fuel cell module 30: Fuel cell device

Claims (8)

A cell stack in which a plurality of fuel cells that generate power with fuel gas and oxygen-containing gas are arranged;
A vaporizer for converting the raw fuel supplied from the outside into a raw fuel gas with an increased temperature;
A reformer for reforming the raw fuel gas supplied from the vaporizer into the fuel gas,
The evaporator and the reformer, respectively extend along the arrangement direction of the fuel cells,
Arrangement wherein with raw fuel inlet is provided to the raw fuel at one end in the arrangement direction of the fuel cell of the carburetor is supplied, the carburetor is opened the reformer and the cell stack and spacing Has been
The fuel gas constitutes the cell stack at the other end of the reformer in the arrangement direction of the fuel cells, which is a position facing the raw fuel inlet of the vaporizer and the arrangement direction of the fuel cells. A fuel gas outlet for supplying the fuel cell is provided;
The cell stack apparatus, wherein the reformer is disposed so as to be positioned between the vaporizer and the cell stack.   The reformer has a first reformer connected to the vaporizer and a second reformer for reforming the raw fuel gas that has not been reformed by the first reformer into the fuel gas. The cell stack device according to claim 1, further comprising:   The first reformer and the second reformer are provided along the arrangement direction of the fuel cells, and the first reformer and the second reformer are juxtaposed. The cell stack device according to claim 2.   The cell stack device according to claim 2 or 3, wherein the first reformer and the second reformer have a cylindrical shape.   The fuel cell has a fuel gas flow path through which the fuel gas flows from one end to the other end, and burns excess fuel gas that has not been used for power generation at the other end. 5. The cell stack device according to claim 1, wherein the reformer is disposed on the other end side of the fuel cell. 6. A water vaporizer for vaporizing water supplied from the outside into water vapor, the water vaporizer connected to the raw fuel supply side of the vaporizer, and the cell stack side of the reformer; The cell stack device according to claim 5, wherein the cell stack device is disposed on the opposite side to be separated from the reformer.   A fuel cell module comprising the cell stack device according to claim 1 stored in a storage container.   8. A fuel cell device comprising: the fuel cell module according to claim 7; and an auxiliary machine for operating the cell stack device, housed in an outer case.

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