JP6474023B2 - Solid oxide fuel cell device - Google Patents

Description

  The present invention relates to a solid oxide fuel cell device having a heat exchange section.

  As a next-generation clean power generation device, development of fuel cells with high power generation efficiency has been activated. Examples of fuel cells include polymer electrolyte fuel cells (PEFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), solid oxide fuel cells (SOFC), alkaline electrolyte fuel cells ( AFC), direct fuel cell (DFC) and the like are known. In particular, a solid oxide fuel cell uses an oxide ion conductive solid electrolyte as an electrolyte, is provided with electrodes on both sides thereof, and supplies a fuel gas on one side and an oxygen-containing gas such as air or oxygen on the other side. Thus, it is a highly efficient fuel cell that operates at a high temperature of about 700 to 1000 ° C. For this reason, high total power generation efficiency can be realized by using a generator such as a gas turbine that utilizes high-temperature exhaust heat. It is also suitable for the construction of a home system that enables hot water supply using the recovered exhaust heat.

  In the solid oxide fuel cell device, the heat content of the exhaust gas in the high temperature state generated by power generation is recovered by the oxygen-containing gas supplied to the fuel cell for power generation, so that no heating means such as an external burner is used. Further, the heat utilization rate in the solid oxide fuel cell device is improved by effectively utilizing the amount of heat in the solid oxide fuel cell device. For this purpose, the solid oxide fuel cell device has a heat exchange part for exchanging heat between the exhaust gas and the oxygen-containing gas.

  For example, in Patent Document 1, combustion gas generated by burning the remaining fuel gas ejected from the upper end of a fuel cell stack composed of an array of a plurality of fuel cells is introduced into an upper heat exchanger, Heat exchange is performed with the oxygen-containing gas supplied to the fuel cell. The heat exchanger described in Patent Document 1 is a so-called tube fin type heat exchanger in which a plurality of tubes are arranged inside a casing of a heat exchanger, and the amount of heat of combustion gas flowing in the tube is transferred to the wall surface of the tube. It is made to conduct to the oxygen-containing gas meandering through the casing.

  Further, in Patent Document 2, in order to use the exhaust heat with high efficiency while making the fuel cell module compact, two plate-like flow paths are provided on the inner side wall of the fuel cell module container, and the exhaust gas, oxygen-containing gas, etc. Is allowed to function as a heat exchanger.

JP 2012-14921 A JP 2005-1000094 A2 JP 2004-44870 A

  However, the heat exchanger described in Patent Document 1 requires a plurality of tubes for circulating the exhaust gas, and further requires a guide plate for meandering the oxygen-containing gas inside the heat exchanger. For this reason, the structure of the heat exchanger becomes complicated, and not only simply increases the member cost as a heat exchanger, but also the manufacturing process and the manufacturing cost are remarkably increased because there are many welding points. The heat exchanger described in Patent Document 2 also has a flow path meandering with a partition wall in order to increase heat exchange efficiency. For this reason, when the structure becomes complicated, the member cost, the manufacturing time, and the manufacturing cost increase.

  Although it is preferable to improve the heat utilization rate by providing a heat exchanger in the fuel cell device, the complicated structure and unilateral increase in cost are not appropriate for the practical application of the fuel cell device. Therefore, in order not to complicate the internal structure of the heat exchanger arranged in the fuel cell device and at the same time not to increase the cost, a heat transfer plate (fin) is arranged inside the flow path of the heat exchanger. Can be considered.

  That is, if a heat transfer plate is placed inside the exhaust gas flow path and the oxygen-containing gas flow path of the heat exchanger of the solid oxide fuel cell device, the heat transfer plate acts as a flow path resistance, so it passes through the heat exchanger. The residence time of the fluid to be increased increases, thereby enabling heat exchange of a necessary amount of heat. Furthermore, the heat exchange efficiency can be further increased by using a material having high thermal conductivity such as metal for the heat transfer plate member. As such a heat transfer plate, for example, a corrugated fin obtained by folding a plate in a bellows shape, which is known in the field of heat exchange, can be considered. For example, Patent Document 3 discloses that a heat exchanger in which a corrugated fin and a tube are combined is used for a solid oxide fuel cell device.

  In this way, the heat exchange efficiency can be improved by simply arranging the heat transfer plate inside the heat exchange flow path, so that the internal structure of the heat exchanger becomes complicated and the number of welding points is increased and manufactured. An increase in cost can be avoided.

  However, on the other hand, in the known heat transfer plate (fin) structure such as a corrugated fin, although it is easy to attach to the heat exchanger, the manufacturing process of weaving the protrusion structure of the heat transfer plate itself is easy. However, since it cannot be said that it is cheap, it cannot be said that the above-mentioned problem has been solved.

  Furthermore, as shown in FIG. 16, in the known heat transfer plate (fin) represented by the corrugated fin, the fluid passing through the heat transfer plate travels substantially straight, so that the diffusion in the direction perpendicular to the traveling direction. Lack of sex. For this reason, the temperature distribution as a whole of the fluid passing through the heat transfer plate is not necessarily uniform. In particular, depending on the shape of the heat exchanger, the flow path configuration, and the surrounding environment of the heat exchanger, the temperature distribution in the flow path may vary depending on the location. Efficiency will decrease.

  Therefore, an object of the present invention is to provide a solid oxide fuel cell device having a heat exchanging portion that is easy to manufacture and achieves low cost while maintaining and improving the heat exchanging efficiency with a simple structure.

Therefore, one aspect of the configuration of the invention disclosed in this specification is a solid oxide fuel cell device including a fuel cell stack including a plurality of fuel cells that generate power using fuel gas and oxygen-containing gas. An oxygen-containing gas introduction path for introducing an oxygen-containing gas into the fuel cell stack, an exhaust gas discharge path for discharging exhaust gas generated by power generation to the outside of the fuel cell device, an oxygen-containing gas introduction path and exhaust gas discharge A heat exchange section in which heat exchange is performed between the oxygen-containing gas flowing through the oxygen-containing gas introduction path and the exhaust gas flowing through the exhaust gas discharge path. In at least one of the gas introduction path or the exhaust gas discharge path, when the oxygen-containing gas or exhaust gas goes straight, it always collides and changes the direction of flow and repeats this so that the convex portion is shifted. Heat transfer plate which is arranged is provided with a first region in which the convex portion is arrayed, in a solid oxide fuel cell device and the second region is provided which is not formed of the projections is there.

The heat transfer plate of the present invention has a plurality of protrusions so that the fluid flowing on the upper surface of the heat transfer plate always collides with the protrusions in the initial flow direction introduced into the heat transfer plate and is forced to change direction. They are staggered. Further, a first region where a plurality of convex portions are arranged and a second region where no convex portions are formed are provided. For this reason, since the fluid does not go straight through the heat transfer plate and always collides with the convex portion, the convex portion functions as a flow path resistance. Therefore, the flow rate of the fluid decreases as a whole, and as a result, heat exchange is promoted. Moreover, the fluid can flow over a long distance in the lateral direction. For this reason, since fluid can be diffused in a wide area, heat can be made uniform quickly.

  Here, since the fluid that collided with the convex portion is changed in the forward flow direction to the left-right direction, the change of the flow direction in the plural convex portions generates turbulent flow. As a result, the fluid can diffuse over a wide area on the heat transfer plate. Therefore, even if the amount of heat exchange differs depending on the location of the heat exchanging portion, the fluid subjected to the heat exchange diffuses in a wide area as a turbulent flow, so that the temperature of the fluid is quickly equalized.

  Thus, the convex portion not only functions as a flow path resistance but also increases the fluid diffusivity, so that the heat exchange efficiency of the heat exchange portion can be improved. At the same time, since the convex portion can be easily formed, it can be realized at low cost. Further, an oxygen-containing gas having a uniform temperature can be supplied to each fuel cell of the fuel cell stack.

  Here, in the present specification, the “heat exchanging portion” means that the fluids having different thermal energies held in each of the two or more flow paths are allowed to pass through, and these flow paths are thermally connected. A portion having a function of performing heat exchange by transferring heat energy from a high fluid to a low temperature fluid. The heat exchanging section is not limited to a dedicated heat exchanger as a separate body for heat exchange, but also includes a heat exchanging region in which a flow path is formed using a part of the container wall surface of the fuel cell device.

  In this specification, “exhaust gas” refers to the remaining gas that is not used for power generation among the fuel gas and oxygen-containing gas supplied for power generation by the fuel cell, and is the residual gas of the fuel gas. It may be the remaining gas of the oxygen-containing gas. Moreover, these mixed gas may be sufficient and the combustion gas produced | generated by burning the said mixed gas may be sufficient.

  One embodiment of the structure of the invention disclosed in this specification includes a first region in which a plurality of convex portions are arranged in a direction orthogonal to a direction in which the oxygen-containing gas or exhaust gas flows onto the heat transfer plate, and the convex portions A solid oxide fuel cell device in which a fluid can flow in a direction orthogonal to each other through the second region by being alternately and repeatedly provided with the second region that is not formed.

  With this configuration, the fluid whose direction of flow has been changed from the straight direction by passing through the region where the convex portion is provided (first region) can pass through the region where the convex portion is not provided (second region). Long distance flow is possible in the lateral direction through. For this reason, since fluid can be diffused in a wide area, heat can be made uniform quickly.

  In addition, according to one aspect of the configuration of the invention disclosed in this specification, the heat transfer plate has a plurality of convex portions and an oxygen-containing gas or exhaust gas can flow between the upper surface and the lower surface of the heat transfer plate. This is a solid oxide fuel cell device provided with a plurality of vent holes.

  Since the heat transfer plate has the convex portions and the vent holes, the fluid colliding with the convex portions can flow not only on the surface of the heat transfer plate but also on the lower surface. As a result, since the fluid can be diffused three-dimensionally using both surfaces of the heat transfer plate, the diffusibility is increased and the heat exchange efficiency can be improved.

  Further, one embodiment of the structure of the invention disclosed in this specification is a solid oxide characterized in that a convex portion and a vent hole formed on the heat transfer plate are a pair cut and raised from the heat transfer plate. This is a fuel cell device.

  Since the convex portions and the air holes can be formed in the same region, it is possible to form these structures with high density, thereby improving the heat exchange performance of the heat exchange portion. In addition, since the plurality of convex portions and the air holes can be formed by one cut and raised (punching), the manufacturing becomes very easy and the manufacturing cost can be reduced.

  Further, according to one aspect of the configuration of the invention disclosed in this specification, both surfaces of the heat transfer plate have a convex portion cut and raised from the heat transfer plate and a concave portion generated on the back surface by the cut and raised, and one surface The back surface of the first region corresponds to the second region, and the back surface of the second region corresponds to the solid oxide fuel cell device corresponding to the first region.

  The heat transfer plate in the present invention can form convex portions and concave portions on both surfaces by cutting and raising by one press working. As a result, a heat transfer plate that can flow three-dimensionally and has the same heat exchange performance on both surfaces of the heat transfer plate can be manufactured at low cost.

  Further, according to one aspect of the configuration of the invention disclosed in this specification, each of the plurality of convex portions has a long side and a short side in a top view, and is a solid oxide having a bridge shape having a girder portion and a leg portion. This is a physical fuel cell device.

  By making the convex part into a bridge shape, the leg part that obstructs the flow of fluid, the girder part that contacts the flow path wall surface and transfers heat, and the vent hole that enables the fluid to move to the lower surface are integrated. Can be formed. Further, the shape can be easily formed at low cost by cutting and raising by one press working.

  In addition, according to one aspect of the structure of the invention disclosed in this specification, the plurality of convex portions are oblique in the long side or the short side with respect to the direction in which the oxygen-containing gas or the exhaust gas flows onto the heat transfer plate in a top view. This is a solid oxide fuel cell device arranged as described above.

  By disposing a convex part on a rectangle having a long side and a short side in the top view obliquely in the flow direction, the flow of fluid that collides with the convex part can be changed in the left-right direction, thereby allowing the fluid to flow over a wide area. Can diffuse.

In addition, according to one embodiment of the structure of the invention disclosed in this specification, the plurality of convex portions in the first region are arranged so as to be inclined in the same direction and angle in a top view, and further between the second In the first regions adjacent to each other with respect to this region, the respective convex portions are solid oxide fuel cell devices arranged so as to be orthogonal to each other when viewed from above.

  By arranging the convex portions in the adjacent first regions so as to be orthogonal to each other, the fluid whose direction of flow has changed further collides with the convex portions, so that the diffusion performance can be improved.

  One embodiment of the configuration of the invention disclosed in this specification is that a solid oxide fuel cell device includes a fuel cell stack, and a fuel gas that is provided above the fuel cell stack and uses a source gas for power generation A reformer for steam reforming, and a combustion section above the fuel cell stack for heating the reformer by burning the fuel gas and oxygen-containing gas remaining in power generation, The oxygen-containing gas introduction path and the exhaust gas discharge path are arranged on at least a part of the upper surface or the side surface of the container so that the exhaust gas discharge path is on the inner side of the oxygen-containing gas introduction path. Is a solid oxide fuel cell device in which a heat transfer plate is provided so as to divide the flow path into two spaces.

  In a fuel cell device in which a heat exchange part is formed on a vessel wall surface, a heat transfer plate having a high thermal diffusibility is arranged in at least one of an oxygen-containing gas introduction path or an exhaust gas discharge path so that the flow path is divided into two. Thus, the fluid passing through the inside of each of the two spaces can be soaked, and the heat exchange performance is improved. For this reason, since a separate dedicated heat exchanger is not required, the fuel cell device can be reduced in size and cost.

  Further, according to one aspect of the configuration of the invention disclosed in this specification, the heat transfer plate has a plurality of convex portions and a plurality of the plurality of protrusions for flowing from one space into which the oxygen-containing gas or the exhaust gas is partitioned. This is a solid oxide fuel cell device having a vent hole.

  In particular, since the heat transfer plate is provided with a plurality of air holes that can flow between both surfaces, the fluid moves back and forth in two sections and diffuses over a wide area, so that the heat exchange performance of the heat exchange section can be improved. it can.

  Further, according to one aspect of the structure of the invention disclosed in this specification, the heat transfer plate provided in one of the oxygen-containing gas introduction path or the exhaust gas discharge path has an oxygen concentration through a plurality of convex portions. It is a solid oxide fuel cell fixed to the wall surface constituting the other of the contained gas introduction path or the exhaust gas discharge path.

  Heat exchange performance can be improved by the heat transfer plate provided in one flow path of the oxygen-containing gas introduction path or the exhaust gas discharge path being in direct contact with the other flow path.

  In order to improve the heat exchange rate of the heat exchange part, it is preferable that all of the plurality of convex parts provided on one surface of the heat transfer plate are in contact with the heat exchange surface where the two flow paths are in contact. However, it is not always necessary to fix all of them, and it is sufficient to select a score that allows the heat transfer plate to be securely fixed to the flow path.

  Further, one aspect of the configuration of the invention disclosed in this specification is a heat transfer plate provided on one of an oxygen-containing gas introduction path or an exhaust gas discharge path installed on the upper surface of the container, and a side surface of the container. The one heat transfer plate provided in the oxygen-containing gas introduction path or the exhaust gas discharge path constitutes the other of the oxygen-containing gas introduction path or the exhaust gas discharge path in the two divided spaces. It is a solid oxide fuel cell device arranged in combination so as to flow preferentially through a space in contact with the wall surface.

  Of the two divided spaces, the side that has the surface in contact with the other flow channel is a space that directly exchanges heat with the other flow channel, so by introducing the fluid preferentially to the space, the amount of heat that the fluid has can be reduced. It can be used effectively.

  Further, according to one aspect of the configuration of the invention disclosed in this specification, the heat transfer plate provided in at least one of the oxygen-containing gas introduction path and the exhaust gas discharge path disposed on the side surface of the container is a fuel cell stack. This is a solid oxide fuel cell device provided above the upper end.

  Since the heat transfer plate according to the present invention has a very high heat exchange performance, the heat exchange is maximized by performing heat exchange above the high-temperature stack (combustion part) in the power generation chamber, and the stack has a relatively low temperature. Since the arrangement of the heat transfer plate is not required in the flow path close to the region, the arrangement area of the heat transfer plate can be minimized and the cost can be reduced.

  Further, one embodiment of the configuration of the invention disclosed in this specification is to make the temperature of the oxygen-containing gas uniform inside the oxygen-containing gas introduction path and below the region where the heat transfer plate is provided. This is a solid oxide fuel cell device having a partition plate having a plurality of holes.

  By installing a partition plate having a plurality of holes below the region where the heat transfer plate is arranged inside the oxygen-containing gas introduction path, the partition plate functions as a flow path resistance. The contained gas is further diffused and soaked, and ejected from the plurality of holes to the lower end of the oxygen-containing gas introduction path.

  It is possible to provide a solid oxide fuel cell device having a heat exchanging part that maintains and improves the heat exchange efficiency with a simple structure and is easy to manufacture and at a low cost.

It is a perspective view which shows the fuel cell apparatus which installed the heat exchanger plate by one Embodiment of this invention. It is an enlarged view which shows the heat exchanger plate by one Embodiment of this invention. It is a three-plane figure which shows the heat exchanger plate by one Embodiment of this invention. They are the perspective view (a) which shows the flow of the fluid of the heat exchanger plate by one Embodiment of this invention, the enlarged view (b) of the convex part of a heat exchanger plate, and the enlarged view (c) of a recessed part. It is a top view which shows the flow of the fluid of the heat exchanger plate by one Embodiment of this invention. 1 is an overall configuration diagram showing a solid oxide fuel cell device according to an embodiment of the present invention. 1 is a front sectional view showing a fuel cell module of a solid oxide fuel cell device according to an embodiment of the present invention. It is sectional drawing along the III-III line of FIG. 1 is a perspective view showing a state where a heat insulating material and a housing are removed from a fuel cell module of a solid oxide fuel cell device according to an embodiment of the present invention. FIG. 10A is a perspective view of a reformer according to an embodiment of the present invention as viewed obliquely from above, and FIG. 10B is a cross-sectional view taken along line VB-VB in FIG. FIG. 10C is a cross-sectional view taken along the line VC-VC in FIG. 1 is a partial cross-sectional view showing a fuel cell unit of a solid oxide fuel cell according to an embodiment of the present invention. 1 is a perspective view showing a fuel cell stack of a solid oxide fuel cell according to an embodiment of the present invention. It is front sectional drawing which shows a fuel cell module for demonstrating the flow of the gas in the fuel cell module of the solid oxide fuel cell apparatus by one Embodiment of this invention. FIG. 8 is a cross-sectional view of the fuel cell module taken along line III-III in FIG. 7 for explaining a gas flow in the fuel cell module of the solid oxide fuel cell device according to the embodiment of the present invention. The solid oxide fuel cell apparatus by which the heat exchanger by one Embodiment of this invention was provided separately. It is a figure which shows the conventional heat exchanger plate.

  Hereinafter, embodiments of the invention disclosed in this specification will be described in detail with reference to the drawings. From the following description, many modifications and other embodiments of the present invention are apparent to persons skilled in the art. Accordingly, the following description is to be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the invention. Details of the structure and / or function may be substantially changed without departing from the spirit of the invention.

(Embodiment 1)
In the present embodiment, the mechanism of fluid diffusion in the heat transfer plate according to the present invention will be described in comparison with a conventional structure.

  In general, a heat transfer plate used for a heat exchanger increases the amount of heat exchange of a fluid passing through two thermally connected flow paths, and extends the flow path by meandering the flow path or functions as a flow path resistance. There have been devised measures such as increasing the heat exchange area and increasing the heat exchange time by installing members. For example, the above-described conventional corrugated fin is obtained by folding a heat transfer plate in a bellows shape, and the folded flow path functions as a flow path resistance against the fluid passing through the interior. Further, since the fluid passing through the inside moves in contact with the upper surface, the lower surface, and the side surface (wall surface) of the folded heat transfer plate, heat exchange with other flow paths is promoted through the heat transfer plate.

  However, in the conventional heat transfer plate (fin), the fluid is almost straightly discharged through each of the plurality of divided flow paths. For this reason, since the fluid does not flow in the direction orthogonal to the flow, the temperature diffusivity in the orthogonal direction is low, and it is difficult to make the heat quantity in the entire flow path uniform.

  In contrast, the heat transfer plate according to the present invention has a plurality of convex portions 4 arranged on the surface of the heat transfer plate 2 as shown in FIG. For this reason, when the fluid is introduced from one end of the heat transfer plate 2, the fluid flowing on the upper surface of the heat transfer plate 2 always collides with the convex portion 4 in the initial flow direction and is forced to change direction. For this reason, since the fluid does not go straight through the heat transfer plate 2 and always collides with the convex portion 4, the convex portion 4 functions as a flow path resistance. Therefore, the flow velocity of the fluid on the heat transfer plate 2 is reduced as a whole, and as a result, heat exchange is promoted.

  In the present specification, a high-temperature fluid and a low-temperature fluid that are heat exchange targets are collectively referred to as “fluid”. Here, the fluid is not limited to exhaust gas as a high-temperature fluid and oxygen-containing gas as a low-temperature fluid, which will be described in detail below, and includes various gases or liquids that can be used for fuel cell devices and can be subject to heat exchange. .

  Furthermore, the heat transfer plate 2 according to the present invention can diffuse long in a direction orthogonal to the direction in which the fluid flows into the heat transfer plate 2. FIG. 3 is a three-side view showing an example of the heat transfer plate according to the present invention, FIG. 3 (a) is a top view, FIG. 3 (b) is a front view (direction in which fluid flows), and FIG. ing. As shown in FIG. 3, a plurality of convex portions 4 are provided on the surface of the heat transfer plate 2, and a first region 5 a in which a plurality of convex portions 4 are arranged in a direction orthogonal to the fluid flow direction, The second regions 5b where the convex portions 4 are not provided are provided alternately. For this reason, when the fluid whose direction of flow is changed by the convex portion 4 enters the second region 5b, the convex portion 4 that is a collision target of the fluid is not provided, and the fluid can go straight. Spreads over a wide area without damage. For this reason, since the fluid can be diffused in a wide area, the heat can be made uniform.

  In the example shown in FIG. 5, the convex portions 4 are provided on both surfaces of the heat transfer plate 2, and the convex portions 4 indicated by dotted lines indicate the convex portions provided on the back surface (that is, the concave portions 6 viewed from the front surface). ing. In this case, a convex portion is provided on the back surface of the second region 5b where the convex portion 4 is not provided.

  Furthermore, since the heat transfer plate 2 according to the present invention can flow three-dimensionally while allowing the fluid flowing through the heat transfer plate 2 to reach both the upper and lower surfaces of the heat transfer plate 2, It is possible to improve the uniformity and improve the heat exchange rate of the heat exchange section.

  As described above, in the conventional heat transfer plate 2 shown in FIG. 16, the flow path is divided into a plurality of sections by the wall surface of the heat transfer plate folded in a bellows shape, so that the fluid can only go straight through the respective sections. . Alternatively, even if a vent is provided in the wall surface to allow the passage between the partitioned flow paths, the flow of the fluid is largely blocked by the wall surface of the adjacent partition. It is scarce, and it does not lead to soaking of the whole flow path.

  On the other hand, the heat transfer plate according to the present invention includes a vent hole on the upper surface of the heat transfer plate 2 that allows fluid to flow to the lower surface together with the convex portion 4. For this reason, the heat transfer plate 2 is provided with a plurality of vent holes so as to be able to flow between the upper surface and the lower surface of the heat transfer plate. The fluid colliding with the part 4 can flow not only to the upper surface of the heat transfer plate 2 but also to the lower surface. Accordingly, the fluid can be diffused over a wide area using both surfaces of the heat transfer plate 2, so that the heat exchange efficiency can be improved.

  Here, as shown in FIG. 2, the heat transfer plate 2 according to the present invention forms a convex portion 4 and a vent hole 4 c formed on the heat transfer plate 2 as a pair cut and raised from the heat transfer plate 2. It is possible. That is, since the convex part 4 and the vent hole 4c can be formed in the same area | region, it can form in high density and, thereby, heat exchange performance can be improved. Further, since the plurality of convex portions 4 and the vent holes 4c can be formed by cutting and raising once, the manufacturing is very easy and the manufacturing cost can be reduced.

  When forming the convex portion 4 and the concave portion 6 on the heat transfer plate 2, the heat transfer plate 2 may be cut and raised (pressed out) by pressing both sides of the heat transfer plate 2 with a pressing machine, or roller processing. May be performed. Further, the cut and raised may be formed by combining press working and roller working.

  Further, the heat transfer plate 2 of the present invention will be described with reference to FIGS. 3 and 4. As shown in FIG.3 (c), both surfaces of the heat exchanger plate 2 have the convex part 4 cut and raised from the heat exchanger plate 2, and the recessed part 6 which arose on the back surface by cut and raised, and the 1st in one surface The back surface of the first region 5a corresponds to the second region 5b, and the back surface of the second region corresponds to the first region. That is, the heat transfer plate 2 in the present invention can form the convex portions 4 and the concave portions 6 on both surfaces by cutting and raising by one press working. As a result, a heat transfer plate that can flow three-dimensionally and that has the same quality of heat exchange performance on both surfaces of the heat transfer plate can be manufactured at low cost.

  FIG. 4 shows an example of the fluid flow on the surface of the heat transfer plate 2. 4A is a perspective view of the heat transfer plate 2, FIG. 4B is an enlarged view of the convex portion 4, and FIG. 4C is an enlarged view of the concave portion 6. The arrows in the figure indicate the flow of the fluid, the solid arrow indicates the fluid flowing on the surface of the heat transfer plate 2, and the dotted arrow indicates an example of the fluid flowing on the back surface of the heat transfer plate 2. An example of the flow of fluid passing through the convex portion 4 will be described with reference to FIGS. 4 (a) and 4 (b). The fluid flowing into the convex portion 4 passes through the convex portion 4 in FIG. 4A and blows through the upper surface of the heat transfer plate 2 as it is, and passes through the vent hole 4c and passes through the lower surface of the heat transfer plate 2. Dispersed in the flow path (8b) that blows through, the flow path (8c) that collides with the leg 4a of the convex portion 4 and refracts and flows. Thereafter, the fluid that has passed through the convex portion 4 interferes with other convex portions and concave portions and diffuses, and such fluids influence each other, thereby presenting a complex and wide-area diffusion as a whole.

  Furthermore, an example of the flow of fluid flowing into the recess 6 will be shown with reference to FIGS. 4 (a) and 4 (c). The fluid flowing into the recess 6 flows straight through the recess 6 and flows to the other recess 6 (9a) and the recess 6 (the vent hole 4c on the lower surface of the heat transfer plate 2) and flows through the lower surface (9b). ), After passing through the concave portion 6, collides with the leg portion 4 a of the convex portion 4, refracts and flows through the flow path (9 c), flows into the concave portion 6, and the leg portion 4 a of the convex portion 4 corresponding to the concave portion 6 They are in contact with each other and are dispersed in a flow path (9d) that flows by being refracted on the lower surface of the heat transfer plate 2. Therefore, by passing through the recess 6, the fluid is three-dimensionally diffused and heat dispersibility is improved. In addition, although it showed as an example which simplified the flow of the fluid here, naturally the flow of the fluid is naturally complicated, In the heat transfer plate 2 concerning this invention, the fluid is the heat transfer plate 2. As long as it functions so as to diffuse three-dimensionally.

  Furthermore, in the present invention, the convex portion 4 has a long side and a short side in a top view and has a bridge shape having a girder portion 4b and a leg portion 4a. It is possible to integrally form the girder portion 4b that contacts the flow path wall surface and transfers heat and the vent hole 4c that allows the fluid to move to the lower surface. Further, the shape can be formed by a simple manufacturing process at low cost by cutting and raising by one press working.

  Further, as shown in FIG. 5, the plurality of convex portions 4 are arranged such that the long side or the short side is inclined with respect to the direction in which the fluid flows onto the heat transfer plate 2 in a top view. Therefore, by disposing the convex part 4 on the rectangle having the long side and the short side in the top view obliquely in the flow direction, the flow of the fluid colliding with the convex part can be changed in the left-right direction. Fluid can be diffused over a wide area.

  Further, according to one aspect of the configuration of the invention disclosed in this specification, as illustrated in FIGS. 3A and 5, the plurality of convex portions 4 in the first region have the same direction and angle in a top view. In the first regions 5a adjacent to each other with the first region 5a interposed therebetween, the convex portions are disposed so as to be orthogonal to each other when viewed from above. That is, by arranging the convex portions 4 in the adjacent first regions 5a so as to be orthogonal to each other, the fluid whose direction of flow has changed further collides with the convex portions 4, thereby improving the diffusion performance. it can.

  By configuring the heat transfer plate 2 as described above, the heat transfer plate 2 functions as a flow path resistance, and the residence time of the fluid passing through the inside of the heat exchanger is increased, thereby enabling heat exchange of a necessary amount of heat. Become. That is, by providing the heat transfer plate 2 in the solid oxide fuel cell device that uses exhaust heat, the heat exchange efficiency is maintained and improved with a simple structure, and the heat exchange part that is easy to manufacture and has a low cost is provided. A solid oxide fuel cell device can be provided.

(Embodiment 2)
Next, an embodiment of a solid oxide fuel cell device using a heat transfer plate according to the present invention will be described with reference to the drawings.

  FIG. 6 is an overall configuration diagram showing a solid oxide fuel cell device according to an embodiment of the present invention. As shown in FIG. 6, a solid oxide fuel cell device 101 according to an embodiment of the present invention includes a fuel cell module 102 and an auxiliary unit 104.

  The fuel cell module 102 includes a housing 106, and a metal module case 108 is built in the housing 106 via a heat insulating material 107. In the power generation chamber 110, which is the lower part of the module case 108, which is a sealed space, a fuel gas and an oxygen-containing gas (hereinafter referred to as “oxidant gas”, “power generation air” or “air” as appropriate). A fuel cell assembly 112 that performs a power generation reaction is disposed. The fuel cell assembly 112 includes nine fuel cell stacks 114 (see FIG. 7). The fuel cell stacks 114 are composed of 16 fuel cell units 116 each including a fuel cell. It is configured. In this example, the fuel cell assembly 112 has 144 fuel cell units 116. In the fuel cell assembly 112, all of the plurality of fuel cell units 116 are connected in series.

  A combustion chamber 118 as a combustion section is formed above the power generation chamber 110 of the module case 108 of the fuel cell module 102. In this combustion chamber 118, residual fuel gas and residual air that have not been used for the power generation reaction are formed. The exhaust gas is combusted. Further, the module case 108 is covered with a heat insulating material 107, and the heat inside the fuel cell module 102 is prevented from being diffused to the outside air. A reformer 120 for reforming the fuel gas is disposed above the combustion chamber 118, and the reformer 120 is heated to a temperature at which a reforming reaction can be performed by the combustion heat of the residual gas. doing.

  Further, an evaporator 125 described later is provided in the heat insulating material 107 above the module case 108 in the housing 106. The evaporator 125 burns the exhaust gas, which is residual gas, in the combustion chamber 118, and the exhaust gas and water are supplied. By performing heat exchange between these exhaust gas and water, the water is evaporated and water vapor is generated. The mixed gas of the water vapor and the raw fuel gas (hereinafter sometimes referred to as “fuel gas”) is supplied to the reformer 120 in the module case 108.

  Next, the auxiliary unit 104 stores pure water tank 126 that stores water condensed from moisture contained in the exhaust from the fuel cell module 102 and uses the filter to obtain pure water, and water supplied from the water storage tank. A water flow rate adjustment unit 128 (such as a “water pump” driven by a motor) is provided. In addition, the auxiliary unit 104 adjusts the flow rate of the fuel gas, the gas shutoff valve 132 that shuts off the fuel supplied from the fuel supply source 130 such as city gas, the desulfurizer 136 for removing sulfur from the fuel gas, A fuel flow rate adjusting unit 138 (such as a “fuel pump” driven by a motor) and a valve 139 for shutting off fuel gas flowing out from the fuel flow rate adjusting unit 138 when the power is lost. Further, the auxiliary unit 104 includes an electromagnetic valve 142 that shuts off air supplied from the air supply source 140, a reforming air flow rate adjusting unit 144 that adjusts the air flow rate, and a power generation air flow rate adjusting unit 145 (with a motor). Driven “air blower”, etc., a first heater 146 for heating the reforming air supplied to the reformer 120, and a second heater 148 for heating the power generating air supplied to the power generation chamber. I have. The first heater 146 and the second heater 148 are provided in order to efficiently raise the temperature at startup, but may be omitted.

  Next, a hot water production apparatus 150 to which exhaust gas is supplied is connected to the fuel cell module 102. The hot water production apparatus 150 is supplied with tap water from a water supply source 124. The tap water is heated by the heat of exhaust gas and supplied to a hot water storage tank of an external water heater (not shown). The fuel cell module 102 is provided with a control box 152 for controlling the amount of fuel gas supplied and the like. Further, the fuel cell module 102 is connected to an inverter 154 which is a power extraction unit (power conversion unit) for supplying the power generated by the fuel cell module to the outside.

  Next, the structure of the fuel cell module of the solid oxide fuel cell device according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 7 to 9. FIG. 1 is a perspective view of a fuel cell module of a solid oxide fuel cell device according to an embodiment of the present invention. 7 is a side sectional view showing a fuel cell module of a solid oxide fuel cell device according to an embodiment of the present invention, and FIG. 8 is a sectional view taken along line III-III in FIG. 9 is a perspective view showing the fuel cell module with the housing and the heat insulating material removed. FIG.

  As shown in FIGS. 7 and 8, the fuel cell module 102 mainly includes the evaporator 125 provided in the heat insulating material 107 and outside the module case 108 as described above. The fuel cell assembly 112 and the reformer 120 are provided inside.

  The evaporator 125 is fixed on the top plate 108a of the module case 108 (see FIG. 9). Further, a portion 107a of the heat insulating material 107 is disposed between the heat exchange module 121 and the module case 108 so as to fill these gaps. The portion 107a of the heat insulating material 107 is also disposed on the top plate 108a of the module case 108. (See FIGS. 7 and 8).

  Specifically, the evaporator 125 includes a fuel supply pipe 163 that supplies water and raw fuel gas (which may include reforming air) to one side end in the horizontal direction, and an exhaust gas for discharging the exhaust gas. A first exhaust gas exhaust passage 171 connected to an exhaust port 111 formed on the top plate 108a of the module case 108 is connected to the exhaust gas exhaust pipe 182 (see FIGS. 1 and 9) and is connected to the other end in the horizontal direction. Are connected (see FIG. 7). The exhaust port 111 is an opening for discharging the exhaust gas burned in the combustion chamber 118 in the module case 108 to the outside of the module case 108, and is formed at a substantially central portion of the top plate 108a of the module case 108. The evaporator 125 is disposed in the heat insulating material 107 above the exhaust port 111.

  Further, as shown in FIG. 8, the evaporator 125 has a two-layer structure in the vertical direction, and the exhaust gas supplied from the first exhaust gas discharge passage 171 is disposed in the lower layer portion located on the module case 108 side. An exhaust passage portion 125c through which the gas passes is formed. In addition, the evaporator 125 has, in an upper layer portion located above the exhaust passage portion 125c, an evaporation unit 125a that generates water vapor by evaporating water supplied from the fuel supply pipe 163, and more than the evaporation unit 125a. A mixing unit 125b that is provided on the upstream side in the flow direction of the exhaust gas and mixes the water vapor generated by the evaporation unit 125a and the raw fuel gas supplied from the fuel supply pipe 163 is formed. For example, the evaporator 125a and the mixer 125b of the evaporator 125 are formed in a space in which the evaporator 125 is partitioned by a partition plate provided with a plurality of communication holes.

  In such an evaporator 125, heat exchange is performed between the water in the evaporation section 125a and the exhaust gas passing through the exhaust passage section 125c, and the water in the evaporation section 125a is evaporated by the heat of the exhaust gas, so that water vapor is generated. Will be generated. In addition, heat exchange is performed between the mixed gas in the mixing portion 125b and the exhaust gas passing through the exhaust passage portion 125c, and the temperature of the mixed gas is increased by the heat of the exhaust gas.

  Further, as shown in FIG. 7, the mixing section 125 b of the evaporator 125 passes through the inside of the first exhaust gas discharge path 171 at the end of the evaporator 125 to which the first exhaust gas discharge path 171 is connected. The mixed gas supply pipe 162 for supplying the mixed gas from the mixing portion 125b to the reformer 120 in the module case 108 is connected. One end of the mixed gas supply pipe 162 is connected to the mixed gas supply port 120a provided in the reformer 120, and the module is bent by 90 ° at a point extending substantially horizontally from the mixed gas supply port 120a. The casing 108, the heat insulating material 107a, and the exhaust passage 125c on the upstream side of the evaporator 125 extend in a substantially vertical direction so as to traverse in order, and the other end is connected to the mixing portion 125b of the evaporator 125. In this case, the mixed gas supply pipe 162 is provided so that the end 162b connected to the mixing unit 125b of the evaporator 125 protrudes above the evaporation unit 125a of the evaporator 125 and the bottom surface of the mixing unit 125b. Yes.

  Next, a power generation air introduction passage (oxidant gas introduction passage) 177 as an oxidant gas supply passage is formed outside the module case 108, specifically, between the outer wall of the module case 108 and the heat insulating material 107. (See FIGS. 1 and 8). The power generation air introduction path 177 is a space between the top plate 108a and the side plate 108b of the module case 108 and the power generation air supply case 177a arranged so as to extend along each of the top plate 108a and the side plate 108b. The power generation air is supplied from a power generation air introduction pipe 174 formed at the center position in front view on the top plate 108a of the module case 108 (see FIGS. 1 and 9). The power generation air introduction path 177 injects power generation air into the power generation chamber 110 toward the fuel cell assembly 112 from a plurality of outlets 177b provided in the lower part of the side plate 108b of the module case 108 ( (See FIGS. 1 and 8).

  In addition, plate-shaped heat transfer plates 177c and 177d as heat exchange promoting members are provided inside the power generation air introduction passage 177 (see FIGS. 1 and 8). The heat transfer plate 177c is provided in a portion of the power generation air introduction path 177 along the top plate 108a of the module case 108, and the heat transfer plate 177d is formed of the power generation air introduction path 177 along the side plate 108b of the module case 108. This part is provided at a position that reaches the fuel cell unit 116. The power generation air that flows through the power generation air introduction path 177 passes through the heat transfer plates 177c and 177d, particularly in the module case 108 inside the heat transfer plates 177c and 177d (specifically, in the module case 108). Heat exchange is performed with the exhaust gas passing through the provided second and third exhaust gas discharge passages 172, 173), and is heated. For this reason, the portion where the heat transfer plates 177c and 177d are provided in the power generation air introduction path 177 functions as a heat exchange section (air heat exchange section).

  Heat transfer plates 172a, 177c, and 177d provided inside the second exhaust gas discharge path 172 and the power generation air introduction path 177 divide the flow path of the second exhaust gas discharge path 172 or the power generation air introduction path 177 into two. The plurality of air holes (not shown) provided in the heat transfer plates 172a, 177c, and 177d allow the fluid passing through the inside to pass through the two sections and diffuse in a wide area. Therefore, since the fluid passing through the interior of each of the divided spaces can be soaked, the heat exchange performance is improved without locally changing the heat exchange rate.

  The heat transfer plates 172a, 177c, and 177d provided in the second exhaust gas discharge path 172 and the power generation air introduction path 177 are connected to the power generation air introduction path 177 and the second exhaust gas exhaust via a plurality of convex portions (not shown). The other side of the path 172 is fixed to the wall surface. Therefore, since the side having the surface in contact with the other flow path among the two spaces divided by the heat transfer plates (172a, 177c, 177d) is a space that directly exchanges heat with the other flow path, the space The fluid can be preferentially guided to the fluid, the amount of heat of the fluid can be used effectively, and heat exchange can be performed positively.

  Further, the heat transfer plates (172 a, 177 c, 177 d) provided in the power generation air introduction path 177 and the second exhaust gas discharge path 172 are disposed above the upper end of the fuel cell assembly 112. Therefore, heat exchange can be performed between the heat of the combustion unit 110 and the power generation air flowing through the power generation air introduction path 177, and highly efficient heat exchange is possible. For this reason, it is sufficient to arrange the heat transfer plate in a region extending from the upper surface of the module case 108 to the vicinity of the combustion chamber 118, and it is not necessary to provide the heat transfer plate 177d to the position where the fuel cell assembly 112 is provided. be able to. Thereby, the arrangement area of the heat transfer plate 177d can be reduced, and further, the temperature of the fuel cell assembly 112 can be prevented from being lost even during power generation.

  Next, the reformer 120 provided in the module case 108 will be described with reference to FIG. 10 in addition to FIGS. 7 and 8. FIG. 10 (A) is a perspective view of the reformer 120 according to an embodiment of the present invention as viewed obliquely from above, and FIG. 10 (B) is a cross section taken along line VB-VB in FIG. 10 (A). FIG. 10C is a cross-sectional view taken along the line VC-VC in FIG. 10A to 10C, in addition to the reformer 120, a mixed gas supply pipe 162, a fuel gas supply pipe 164, and the like are also illustrated.

  The reformer 120 is disposed so as to extend horizontally above the combustion chamber 118, and is fixed to the top plate 108a at a predetermined distance from the top plate 108a of the module case 108 (see FIG. 7). . The reformer 120 is supplied with the mixed gas from the mixed gas supply pipe 162 through the mixed gas supply port 120a, and preheats the premixed gas 120 in the flow direction of the mixed gas. A reformer provided on the downstream side and filled with a reforming catalyst (not shown) for reforming a mixed gas (that is, raw fuel gas mixed with water vapor (may include reforming air)) 120c (see FIG. 10B). As the reforming catalyst, a catalyst obtained by imparting nickel to the alumina sphere surface or a catalyst obtained by imparting ruthenium to the alumina sphere surface is appropriately used. The preheating unit 120b and the reforming unit 120c of the reformer 120 are formed in a space in which the reformer 120 is partitioned by a partition plate 120e provided with a plurality of communication holes (see FIG. 10B). Here, the reformer 120 is configured such that the mixed gas from the mixed gas supply pipe 162 is ejected from the mixed gas supply port 120a, and this mixed gas is expanded in the preheating unit 120b to reduce the ejection speed. At the same time, the jetted mixed gas collides with the wall surface on the downstream end side of the preheating unit 120b and turns back, and is supplied to the reforming unit 120c through the partition plate 120e (FIG. 10B). )reference).

  In the reformer 120, an internal space 120d that is recessed upward is formed in a portion where the reforming portion 120c is formed (see FIG. 10B). The internal space 120d is formed by closing the upper part of a through hole extending so as to penetrate in the vertical direction with a plate or the like. The internal space 120d has a portion 162a of the above-described mixed gas supply pipe 162, specifically, a portion extending in the horizontal direction in the mixed gas supply pipe 162, the end of which is the mixed gas supply of the reformer 120. A portion 162a connected to the mouth 120a is disposed. The portion 162a of the mixed gas supply pipe 162 also functions as a preheating portion that preheats the mixed gas passing through the inside by the exhaust gas in the internal space 120d of the reformer 120 (hereinafter, the portion 162a of the mixed gas supply pipe 162). Is referred to as “preheating portion 162a”).

  The reformer 120 includes a top plate 120f that forms the top surfaces of the preheating unit 120b and the reforming unit 120c, and a shield that is provided above the top plate 120f and has a substantially U-shaped cross-section with the top open. It further includes a plate 120g and a flat plate 120h disposed on the upper portion of the shielding plate 120g (see FIGS. 10A to 10C). In the reformer 120, the space between the top plate 120f and the shielding plate 120g forms an exhaust induction chamber 201 for inducing and flowing exhaust gas above the preheating unit 120b and the reforming unit 120c. In FIG. 7, the space between the shielding plate 120g and the flat plate 120h forms a gas reservoir 203 as a heat insulating layer through which almost no exhaust gas flows (in addition to FIGS. 10A to 10C, FIGS. reference). Further, a flange portion 120 i for fixing the reformer 120 to the top plate 108 a of the module case 108 is provided at the upper end portion of the reformer 120.

  Next, as shown in FIG. 7, on the downstream end side of the reformer 120, a fuel gas as a fuel gas supply passage for supplying fuel gas generated by reforming by the reforming unit 120c of the reformer 120 A supply pipe 164 is connected, and a hydrogen extraction pipe 165 for hydrodesulfurizer is connected to an upper portion of the fuel gas supply pipe 164. The fuel gas supply pipe 164 extends downward, and further extends horizontally in a manifold 166 formed below the fuel cell assembly 112. A plurality of fuel supply holes 164b are formed in the lower surface of the horizontal portion 164a of the fuel gas supply pipe 164, and the reformed fuel gas is supplied into the manifold 166 from the fuel supply holes 164b. A lower support plate 168 having a through hole for supporting the above-described fuel cell stack 114 is attached above the manifold 166, and the fuel gas in the manifold 166 enters the fuel cell unit 116. Supplied. An ignition device 183 for starting combustion of fuel gas and air is provided in the combustion chamber 118.

Next, as shown in FIG. 8, in the module case 108, there is a horizontal gap between the upper surface of the reformer 120 (specifically, the flat plate 120h of the reformer 120) and the lower surface of the top plate 108a of the module case 108. A second exhaust gas discharge path 172 extending in the direction is formed. The second exhaust gas discharge path 172 is juxtaposed with a part of the above-described power generation air introduction path 177 across the top plate 108a of the module case 108. In addition, a plate-shaped heat transfer plate 172a as a heat exchange promoting member is provided inside the second exhaust gas discharge path 172. The heat transfer plate 172a is provided at substantially the same position in the horizontal direction as the heat transfer plate 177c provided in the power generation air introduction path 177. In the portion of the power generation air introduction path 177 and the second exhaust gas discharge path 172 provided with such heat transfer plates 177c and 172a, the power generation air flowing through the power generation air introduction path 177 and the second exhaust gas discharge path 172 flow. Efficient heat exchange is performed with the exhaust gas, and the power generation air is heated by the heat of the exhaust gas. That is, in the second embodiment, the heat transfer plate 172a provided in the power generation air introduction path 177 or the second exhaust gas discharge path 172 is in direct contact with the power generation air path 177, and the heat transfer plate 172a. The heat of the exhaust gas given to the heat transfer plate 172a is given to the heat transfer plate 172a, and the heat of the heat transfer plate 172a is transferred to the wall surface constituting the power generation air introduction path 177 so that heat exchange with the power generation air can be performed efficiently. it can. Further, since the convex portion of the heat transfer plate 177c is also in contact with the wall surface constituting the second exhaust gas discharge path 172 inside the power generation air passage 177, the heat of the exhaust gas is transferred to the heat transfer plate 172a and the power generation air passage 177. Therefore, the heat exchange rate between the exhaust gas and the power generation air can be improved.
The heat transfer plate 172a is the same as the heat transfer plates 177c and 177b.

  Further, a third exhaust gas discharge path 173 extending in the vertical direction is formed between the outer surface of the reformer 120 and the inner surface of the module case 108. The third exhaust gas discharge path 173 communicates with the second exhaust gas discharge path 172, and the exhaust gas flows from the third exhaust gas discharge path 173 to the second exhaust gas discharge path 172. Specifically, the exhaust gas flows into the second exhaust gas discharge path 172 from the exhaust gas inlet 172b located at the upper end of the third exhaust gas discharge path 173 (in other words, the end of the second exhaust gas discharge path 172 in the horizontal direction). To do. The exhaust gas flowing into the second exhaust gas discharge passage 172 from the exhaust gas introduction port 172b passes through the exhaust port 111 formed on the top plate 108a of the module case 108, and the first exhaust gas discharge passage provided outside the module case 108. To 171.

  In addition, on the inner surface of the module case 108 in the middle of the third exhaust gas discharge path 173, specifically, the second exhaust gas discharge path 172 above the preheating part 120b and the reforming part 120c of the reformer 120. The exhaust guide chamber 201 formed in the reformer 120 (the space between the top plate 120f and the shielding plate 120g of the reformer 120) is formed on the inner surface of the module case 8 below the exhaust gas inlet 172b. ), An exhaust guide plate 205 (corresponding to the first exhaust guide portion) for directing exhaust gas is provided.

  Next, the fuel cell unit 116 will be described with reference to FIG. FIG. 11 is a partial cross-sectional view showing a fuel cell unit of a solid oxide fuel cell according to an embodiment of the present invention.

  As shown in FIG. 11, the fuel cell unit 116 includes a fuel cell 184 and inner electrode terminals 186 that are caps respectively connected to both ends of the fuel cell 184.

  The fuel cell 184 is a tubular structure extending in the vertical direction, and includes a cylindrical inner electrode layer 190 that forms a fuel gas flow path 188 therein, a cylindrical outer electrode layer 192, an inner electrode layer 190, and an outer side. An electrolyte layer 194 is provided between the electrode layer 192 and the electrode layer 192. The inner electrode layer 190 is a fuel electrode through which fuel gas passes and becomes a (−) electrode, while the outer electrode layer 92 is an air electrode that comes into contact with air and becomes a (+) electrode.

  Since the inner electrode terminal 186 attached to the upper end side and the lower end side of the fuel cell 184 has the same structure, the inner electrode terminal 186 attached to the upper end side will be specifically described here. The upper portion 190 a of the inner electrode layer 190 includes an outer peripheral surface 190 b and an upper end surface 190 c that are exposed to the electrolyte layer 194 and the outer electrode layer 192. The inner electrode terminal 186 is connected to the outer peripheral surface 190b of the inner electrode layer 190 through a conductive sealing material 196, and is further in direct contact with the upper end surface 190c of the inner electrode layer 190. Electrically connected. At the center of the inner electrode terminal 186, a fuel gas channel narrow tube 198 that communicates with the fuel gas channel 188 of the inner electrode layer 190 is formed.

  The fuel gas passage narrow tube 198 is an elongated thin tube provided so as to extend in the axial direction of the fuel cell 184 from the center of the inner electrode terminal 186. For this reason, a predetermined pressure loss occurs in the flow of fuel gas flowing from the manifold 166 (see FIG. 7) into the fuel gas passage 188 through the fuel gas passage narrow tube 198 of the lower inner electrode terminal 186. To do. Therefore, the fuel gas flow passage narrow tube 198 of the lower inner electrode terminal 186 acts as an inflow side flow passage resistance portion, and the flow passage resistance is set to a predetermined value. Further, a predetermined pressure loss also occurs in the flow of the fuel gas flowing out from the fuel gas channel 188 to the combustion chamber 118 (see FIG. 7) through the fuel gas channel narrow tube 198 of the upper inner electrode terminal 186. Therefore, the fuel gas flow passage narrow tube 198 of the upper inner electrode terminal 186 functions as an outflow side flow passage resistance portion, and the flow passage resistance is set to a predetermined value.

  The inner electrode layer 190 includes, for example, a mixture of Ni and zirconia doped with at least one selected from rare earth elements such as Ca, Y, and Sc, and Ni and ceria doped with at least one selected from rare earth elements. The mixture is formed of at least one of Ni and a mixture of lanthanum garade doped with at least one selected from Sr, Mg, Co, Fe, and Cu.

  The electrolyte layer 194 includes, for example, zirconia doped with at least one selected from rare earth elements such as Y and Sc, ceria doped with at least one selected from rare earth elements, lanthanum gallate doped with at least one selected from Sr and Mg, Formed from at least one of the following.

  The outer electrode layer 192 includes, for example, lanthanum manganite doped with at least one selected from Sr and Ca, lanthanum ferrite doped with at least one selected from Sr, Co, Ni, and Cu, Sr, Fe, Ni, Cu It is formed from at least one of lanthanum cobaltite doped with at least one selected from the group consisting of silver and silver.

  Next, the fuel cell stack 114 will be described with reference to FIG. FIG. 12 is a perspective view showing a fuel cell stack of a solid oxide fuel cell according to an embodiment of the present invention.

  As shown in FIG. 12, the fuel cell stack 114 includes 16 fuel cell units 116, and these fuel cell units 116 are arranged in two rows of 8 each.

  Each fuel cell unit 116 is supported at its lower end by a rectangular rectangular lower support plate 168 (see FIG. 7), and at the upper end, four fuel cell units 116 at both ends are provided, each having a generally square shape. Is supported by the upper support plate 100. The lower support plate 168 and the upper support plate 100 are formed with through holes through which the inner electrode terminals 186 can pass.

  Further, the current collector 103 and the external terminal 105 are attached to the fuel cell unit 116. The current collector 103 includes a fuel electrode connection portion 103a that is electrically connected to an inner electrode terminal 186 attached to the inner electrode layer 190 that is a fuel electrode, and an outer peripheral surface of the outer electrode layer 192 that is an air electrode. It is integrally formed so as to connect the air electrode connecting portion 103b that is electrically connected. In addition, a silver thin film is formed on the entire outer surface of the outer electrode layer 192 (air electrode) of each fuel cell unit 116 as an electrode on the air electrode side. When the air electrode connecting portion 103b contacts the surface of the thin film, the current collector 103 is electrically connected to the entire air electrode.

  Further, two external terminals 104 are connected to the air electrode 186 of the fuel cell unit 116 located at the end of the fuel cell stack 114 (the far left side in FIG. 12). These external terminals 103 are connected to the inner electrode terminal 186 of the fuel cell unit 116 at the end of the adjacent fuel cell stack 114, and as described above, all 160 fuel cell units 116 are connected in series. It has come to be.

  Next, a gas flow in the fuel cell module of the solid oxide fuel cell device according to the embodiment of the present invention will be described with reference to FIGS. FIG. 13 is a side sectional view showing a fuel cell module of a solid oxide fuel cell device according to an embodiment of the present invention, similar to FIG. 14 is a cross-sectional view of the fuel cell module taken along line III-III of FIG. 13 showing a solid oxide fuel cell device according to an embodiment of the present invention similar to FIG. FIGS. 13 and 14 are diagrams in which an arrow indicating a gas flow is newly added in FIGS. 7 and 8, and for the sake of convenience of explanation, a state in which the heat insulating material 107 is removed is illustrated. In FIG. 14, only the flow of fuel gas (including water, water vapor, and raw fuel gas) is shown.

  As shown in FIG. 13, water and raw fuel gas (fuel gas) are supplied into the evaporator 125 from a fuel supply pipe 163 (see FIG. 9) connected to one end in the horizontal direction of the evaporator 125. Specifically, it is supplied into an evaporation unit 125 a provided in the upper layer of the evaporator 125. The water supplied to the evaporator 125a of the evaporator 125 exchanges heat with the exhaust gas flowing through the exhaust passage 125c provided in the lower layer of the evaporator 125, is heated by the heat of the exhaust gas, and is vaporized. It becomes water vapor. The water vapor and the raw fuel gas supplied from the fuel supply pipe 163 flow in the horizontal direction in the evaporator 125a (specifically, toward the side opposite to the side where the fuel supply pipe 163 is connected). In the horizontal direction) and mixed in the mixing unit 125b at the end of the evaporation unit 125a.

  The mixed gas (fuel gas) obtained by mixing the water vapor and the raw fuel gas in the mixing unit 125b is connected to the side opposite to the side where the fuel supply pipe 163 is connected in the evaporator 125, and the exhaust passage of the evaporator 125 is connected. The gas flows through the part 125 c, the heat insulating material 107 a, and the mixed gas supply pipe 162 extending across the module case 108, and flows into the reformer 120 in the module case 108. In this case, the mixed gas includes exhaust gas flowing through the exhaust passage portion 125c below the mixing portion 125b, and exhaust gas flowing around the portion of the mixed gas supply pipe 162 located in the exhaust passage portion 125c and the first exhaust gas discharge passage 171. Then, heat is exchanged with the exhaust gas flowing around the portion of the mixed gas supply pipe 162 located in the module case 108 and heated. Particularly, in the module case 108, in the preheating part 162a of the mixed gas supply pipe 162 located in the internal space 120d of the reformer 120, the mixed gas flowing in the preheating part 162a and the internal space 120d of the reformer 120 are contained. Efficient heat exchange with the exhaust gas.

  Thereafter, the mixed gas supplied from the mixed gas supply pipe 162 to the reformer 120 is provided on one side end side in the horizontal direction of the reformer 120 via the mixed gas supply port 120a of the reformer 120. The mixed gas flowing into the preheating unit 120b and flowing into the preheating unit 120b is preheated by the exhaust gas flowing around the preheating unit 120b. In this case, since the preheating part 120b of the reformer 120 has a structure expanded from the mixed gas supply pipe 162, the mixed gas is ejected from the mixed gas supply pipe 162 to the preheating part 120b of the reformer 120. The jetted mixed gas is expanded in the preheating unit 120b, and the jetting speed is reduced. Then, the mixed gas collides with the wall surface on the downstream end side of the preheating unit 120b, turns back, passes through the reformer partition plate 120e (see FIG. 10B) in the reformer 120, and passes through the preheating unit 120b. The gas flows into the reforming unit 120c, which is located on the downstream side, and is filled with the reforming catalyst, and is reformed in the reforming unit 120c to become fuel gas. The fuel gas generated in this way is supplied to the downstream side of the reforming section 120c of the reformer 120, and to the hydrogen desulfurizer hydrogen extractor connected above the fuel gas supply pipe 164. Flow through tube 165. The fuel gas is supplied into the manifold 166 from the fuel supply hole 164 b provided in the horizontal portion 164 a of the fuel gas supply pipe 164, and the fuel gas in the manifold 166 is supplied into each fuel cell unit 116. .

  On the other hand, as shown in FIG. 14, the power generation air supplied from the power generation air introduction pipe 174 (see FIGS. 1, 7, 9, and 13) is supplied to the top plate 108a and the side plate 108b of the module case 108. The air flows through a power generation air introduction path 177 formed by a space between the power generation air supply case 177a disposed so as to extend along each of the top plate 108a and the side plates 108b. At this time, when the power generation air flowing through the power generation air introduction path 177 passes through the heat transfer plates 177c and 177d, the second and second air passages 177c and 177d are formed in the module case 108 inside the heat transfer plates 177c and 177d. Efficient heat exchange is performed with the exhaust gas passing through the third exhaust gas discharge passages 172 and 173, and the exhaust gas is heated. In particular, since the heat transfer plate 172a is provided in the second exhaust gas discharge path 172 corresponding to the heat transfer plate 177c of the power generation air introduction path 177, the power generation air is transferred to the power generation air introduction path 177. More efficient heat exchange with the exhaust gas is performed via the heat plate 177c and the heat transfer plate 172a in the second exhaust gas discharge path 172.

  In addition, as shown in FIGS. 1, 8, and 14, a partition plate 179 having a plurality of holes is installed in the power generation air introduction path 177 below the region where the heat transfer plate 177d is disposed. The power generation air after heat exchange with the exhaust gas passes through a plurality of holes provided in the partition plate 179. At that time, the partition plate 179 functions as a flow path resistance, and can supply the power generation air that has been diffused and soaked to the fuel cell assembly 112.

  Thereafter, as shown in FIG. 14, the power generation air is injected into the power generation chamber 110 from the plurality of outlets 177 b provided at the lower portion of the side plate 108 b of the module case 108 toward the fuel cell assembly 112.

  On the other hand, the exhaust gas remaining without being used for power generation in the fuel cell unit 116 is burned in the combustion chamber 118 in the module case 108 and rises in the module case 108 as shown in FIG. Specifically, the exhaust gas first passes through a third exhaust gas discharge path 173 formed between the outer surface of the reformer 120 and the inner surface of the module case 108. At this time, the exhaust gas is discharged into the exhaust induction chamber 201 (the top plate 120f and the shielding plate 120g of the reformer 120) formed in the reformer 120 by the exhaust guide plate 205 provided on the inner surface of the module case 108. The space between them. The exhaust gas that has passed through the exhaust induction chamber 201 (including exhaust gas that has flowed into the exhaust induction chamber 201 and exhaust gas that has not flowed into the exhaust induction chamber 201) is stored in the gas reservoir 203 (of the reformer 120) above the exhaust induction chamber 201. It rises without flowing into the space between the shielding plate 120g and the flat plate 120h) and flows into the second exhaust gas discharge path 172 from the exhaust gas inlet 172b.

  Thereafter, the exhaust gas flows in the second exhaust gas discharge path 172 in the horizontal direction, and flows out from the exhaust port 111 formed on the top plate 108 a of the module case 108. When the exhaust gas flows in the second exhaust gas discharge path 172 in the horizontal direction, a heat transfer plate 172a provided in the second exhaust gas discharge path 172 and a power generation air introduction path 177 corresponding to the heat transfer plate 172a. An efficient heat exchange is performed between the power generation air flowing through the power generation air introduction path 177 and the exhaust gas flowing through the second exhaust gas discharge path 172 via the heat transfer plate 177c provided in the exhaust gas. The power generation air is heated by the heat. Here, the heat transfer plate 172a is provided only in the second exhaust gas discharge passage 172 in the exhaust passage, but the place where the heat transfer plate is provided is not limited to the second exhaust gas discharge passage 172, and heat exchange is performed. Any exhaust passage may be used.

  The exhaust gas flowing out from the exhaust port 111 passes through the first exhaust gas exhaust passage 171 provided outside the module case 108, and then passes through the exhaust passage portion 125c of the evaporator 125 connected to the first exhaust gas exhaust passage 171. It flows and is discharged from the exhaust gas discharge pipe 182 (see FIG. 9) connected to the downstream end side of the evaporator 125. As described above, the exhaust gas exchanges heat with the mixed gas in the mixing unit 125b of the evaporator 125 and the water in the evaporation unit 125a of the evaporator 125 when flowing through the exhaust passage portion 125c of the evaporator 125.

  Next, operations and effects of the solid oxide fuel cell device according to the second embodiment of the present invention will be described.

  According to the second embodiment, in the fuel cell device in which the power generation air introduction path 177 and the second exhaust gas discharge path 172 are arranged side by side with the module case 108 interposed therebetween and the heat exchange section is formed, the power generation air is introduced. By disposing a heat transfer plate (172a, 177c, 177d) having high thermal diffusibility in at least one of the passage 177 and the second exhaust gas discharge passage 172 so that the inside of the passage is divided into two, two spaces are provided. In each case, the fluid passing through the inside of the flow path can be soaked, and the heat exchange performance is improved. For this reason, since a separate dedicated heat exchanger is not required, the fuel cell device can be reduced in size and cost. Here, it is sufficient if a heat transfer plate is provided in at least one of the power generation air introduction path 177 and the second exhaust gas discharge path. Is not limited to this embodiment.

  Further, according to the second embodiment of the present invention, the heat transfer plate (172a, 177c, 177d) is provided with a plurality of vent holes (not shown) that can flow between both surfaces. Since the fluid moves back and forth between the two sections and spreads over a wide area, the heat exchange performance can be improved.

  Further, according to the second embodiment of the present invention, the heat transfer plate 172a or the heat transfer plates 177c and 177d provided in one flow path of the power generation air introduction path 177 or the second exhaust gas discharge path 172 are: By directly contacting the other flow path, the heat exchange performance can be improved.

  Further, according to the second embodiment of the present invention, of the two divided spaces, the side having the surface in contact with the other flow channel is a space that directly exchanges heat with the other flow channel, so that the space By guiding the flow path preferentially, the heat quantity of the fluid can be used effectively.

  In addition, according to the second embodiment of the present invention, the heat transfer plates 172a, 177c, and 177d according to the present invention have very high heat exchange performance. In addition to maximizing the use of heat by exchanging, it is not necessary to dispose the heat transfer plate in the flow path close to the region of the fuel cell assembly 112 that is relatively low in temperature. The layout area can be minimized and the cost can be reduced.

  In addition, according to the second embodiment of the present invention, the partition plate 179 has a plurality of holes inside the power generation air introduction path 177 and below the region where the heat transfer plates 177c and 177d are arranged. Since the partition plate 179 functions as a flow path resistance, the soaked oxygen-containing gas is further diffused and soaked, and is ejected from the plurality of holes to the lower end of the power generation air supply passage.

  As described above in the second embodiment, in the fuel cell device in which the heat exchange portion is formed on the vessel wall surface, the heat exchange performance can be improved with a simple configuration. Therefore, it is possible to realize a reduction in size and cost of the fuel cell device.

(Embodiment 3)
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 15 is a schematic cross-sectional view showing another form of the fuel cell module showing an application example of the embodiment of the present invention.

  In the third embodiment, a structure for supplying power generation air to the inside of the fuel cell module 302 will be described with reference to FIG. Practical arrows in FIG. 15 indicate the flow of power generation air, and dotted arrows indicate the flow of exhaust gas. As shown in this figure, a heat exchanger 323 is provided above the reformer 320, and the casing 356 is covered with a heat insulating material 307.

  The heat exchanger 323 is a two-layer heat exchanger, and a power generation air introduction pipe 374 is attached to one end side of the upper layer. The power generation air introduction pipe 374 introduces power generation air into the heat exchanger 323, and the other end of the upper layer of the heat exchanger 323 has a power generation air as shown in FIG. A pair of outlet ports 377a of the air flow path 323a is formed. The outlet port 377a communicates with a pair of communication channels (not shown). Furthermore, power generation air supply passages (not shown) are formed on the outer sides of both sides in the width direction of the casing 356 of the fuel cell module 2.

  Therefore, power generation air is supplied to the power generation air supply path (not shown) from the outlet port 377a of the power generation air flow path 323a and the communication flow path (not shown). The power generation air supply path (not shown) is formed along the longitudinal direction of the fuel cell assembly 312 and further corresponds to the lower side of the fuel cell assembly 312. A plurality of air outlets 377 b are formed at positions to blow out the power generation air toward each fuel cell unit 316 of the fuel cell assembly 312. The power generation air that has flowed into the power generation air supply path (not shown) from the outlet port 377a is directed to the air outlet 377b, and the air generated from the air outlet 377b is outside the fuel cell unit 316. And flows from below to above.

  Further, the reformer introduction pipe 362 is a pipe line for introducing pure water and fuel gas to be reformed into the casing 356. The reformer introduction pipe 362 is a circular pipe extending from the side wall surface at one end of the reformer 320, is bent by 90 ° and extends in a substantially vertical direction, and penetrates the upper end surface of the casing 56. The reformer introduction pipe 362 also functions as a water introduction pipe that introduces water into the reformer 320. More specifically, as shown in FIG. 15, the reformer 320 is connected to the upstream end of the reformer 320 on the right side in the figure.

  The water flowing from the reformer introduction pipe 362 is converted into water vapor by the reformer 320, and the water vapor, fuel gas (city gas) as the gas to be reformed, and air are mixed. Further, the reformer 320 is disposed further above the combustion chamber 318 formed above the fuel cell assembly 312. Therefore, the reformer 320 is heated by the combustion heat of the remaining fuel gas and air after the power generation reaction, and serves as an evaporative mixer and by both the steam reforming reaction by chemically reacting the fuel and steam. It is comprised so that the role as a reformer which can produce | generate will be played.

  The upper end of a fuel supply pipe 366 is connected to the downstream end of the reformer 320. The lower end side of the fuel supply pipe 366 is disposed so as to enter the fuel gas tank 368.

  As shown in FIG. 15, the fuel gas tank 368 is provided directly below the fuel cell assembly 312. The fuel gas supplied from the fuel supply pipe 366 to the fuel gas tank 368 ascends in each fuel cell unit 316 constituting the fuel cell assembly 312 and reaches the combustion chamber 18.

  Subsequently, a structure for discharging exhaust gas generated by power generation to the outside of the module case 356 will be described. In the combustion chamber 318 above the fuel cell unit 316, the fuel gas not used in the power generation reaction and the exhaust gas of power generation air are combusted. Thereafter, the exhaust gas rises in the combustion chamber 318 and reaches the exhaust guide plate 380. As shown in FIG. 15, the exhaust guide plate 380 is provided with an opening 380a, and the exhaust gas is guided into the opening 380a. The exhaust gas that has passed through the opening 380a reaches the exhaust gas discharge passage inlet 324 of the heat exchanger 323 provided as a separate body.

  Under the two-layer heat exchanger 323, an exhaust gas exhaust passage 323b for exhaust gas exhaust is provided. An exhaust gas discharge pipe 382 is connected to the downstream end side of these exhaust gas discharge channels 323b so that the exhaust gas is discharged to the outside.

  Next, the heat exchanger 323 will be described with reference to FIG. The heat exchanger 323 includes a power generation air supply channel 323a in the upper layer and an exhaust gas discharge channel 323b in the lower layer. The power generation air flows through the power generation air supply channel 323a and the exhaust gas flows through the exhaust gas outflow channel 323b. The power generation air receives heat from the exhaust gas and is heated.

Heat transfer plates 378 are arranged inside the power generation air supply flow path 323a and the exhaust gas discharge flow path 323b so as to divide the flow paths, respectively, and promote heat exchange between the power generation air and the exhaust gas. That is, since the heat transfer plate 378 acts as a flow path resistance, the power generation air and the exhaust gas flowing in the counter flow are soaked in the respective flow paths, and the heat transfer plate 378 exchanges heat between the power generation air and the exhaust gas. Since it is in contact with the wall surface in the heat exchanger 323 that performs the heat exchange, the heat exchange can be positively performed.
In FIG. 15, the heat transfer plate 378 is provided in both the exhaust gas flow path 323a and the power generation air flow path 323b, but is provided in either the exhaust gas flow path 323a or the power generation air flow path 323b. You may do it. Further, in FIG. 15, the flow direction of the power generation air and the exhaust gas is shown as a counter flow, but a cross flow or a parallel flow may be used.

  Therefore, even in the fuel cell apparatus in which the heat exchange unit is provided separately as the dedicated heat exchanger 323, the power generation air supply flow path 323a or the exhaust gas discharge flow path 323b provided in the heat exchanger 323 is provided. By providing the heat transfer plate 378 according to the present invention inside the heat exchanger, the heat exchange performance can be easily improved. Therefore, even if it is not a heat exchanger integrated with a module case, the effects of the invention can be achieved.

2 Heat Transfer Plate 4 Convex 4a Leg 4b Girder 4c Vent Hole 5a First Region 5b Second Region 6 Concave 101 Solid Oxide Fuel Cell Device (SOFC)
DESCRIPTION OF SYMBOLS 102 Fuel cell module 107 Heat insulating material 108 Module case 108a Top plate 108b Side plate 112 Fuel cell assembly 116 Fuel cell unit 118 Combustion chamber (combustion part)
DESCRIPTION OF SYMBOLS 111 Exhaust port 120 Reformer 120a Mixed gas supply port 120b Preheating part 120c Reforming part 125 Evaporator 125a Evaporating part 125b Mixing part 125c Exhaust passage part 162 Mixed gas supply pipe 162a Preheating part 171 1st exhaust gas discharge path 172 2nd exhaust gas Discharge path 172a Heat transfer plate 173 Third exhaust gas discharge path 177 Power generation air introduction path (oxygen-containing gas introduction path)
177c, 177d Heat transfer plate 179 Partition plate 201 Exhaust induction chamber 203 Gas reservoir 302 Fuel cell module 307 Heat insulating material 310 Power generation chamber 312 Fuel cell assembly 316 Fuel cell unit 318 Combustion chamber (combustion section)
320 Reformer 323 Heat exchanger 323a Power generation air supply flow path 323b Exhaust gas discharge flow path 324 Exhaust gas discharge flow path inlet 356 Module case 362 Reformer introduction pipe 366 Fuel supply pipe 368 Fuel gas tank 374 Power generation air introduction pipe 377a Outlet port 377b Ejection hole 380 Exhaust guide plate 380a Opening 382 Exhaust gas exhaust pipe

Claims (14)

A solid oxide fuel cell device comprising a fuel cell stack comprising a plurality of fuel cells that generate power using fuel gas and oxygen-containing gas,
An oxygen-containing gas introduction path for introducing an oxygen-containing gas into the fuel cell stack;
An exhaust gas exhaust path for exhausting the exhaust gas generated by the power generation to the outside of the fuel cell device;
The heat exchange part in which the oxygen-containing gas introduction path and the exhaust gas discharge path are thermally connected, and heat exchange is performed between the oxygen-containing gas flowing through the oxygen-containing gas introduction path and the exhaust gas flowing through the exhaust gas discharge path And having
In the inside of at least one of the oxygen-containing gas introduction path or the exhaust gas discharge path in the heat exchange section, the oxygen-containing gas or the exhaust gas always collides and changes the flow direction when it goes straight, and this is repeated. A plurality of heat transfer plates arranged by shifting the protrusions are provided.
A solid oxide fuel cell device comprising a first region in which a plurality of the convex portions are arranged and a second region in which the convex portions are not formed . In claim 1,
In a direction orthogonal to the direction in which the oxygen-containing gas or the exhaust gas flows onto the heat transfer plate,
The first region in which a plurality of the convex portions are arranged and the second region in which the convex portions are not formed are alternately and repeatedly provided, so that the orthogonal direction through the second region A solid oxide fuel cell device characterized in that a fluid can flow. In claim 2,
The heat transfer plate is provided with a plurality of vent holes so that the oxygen-containing gas or the exhaust gas can flow between the upper surface and the lower surface of the heat transfer plate together with the plurality of convex portions. A solid oxide fuel cell device. In claim 3,
The solid oxide fuel cell device, wherein the convex portion and the vent hole formed in the heat transfer plate are a pair cut and raised from the heat transfer plate. In claim 4,
Both surfaces of the heat transfer plate have the convex portion cut and raised from the heat transfer plate and a concave portion generated on the back surface by cutting and raising, and the back surface of the first region on one surface is the second surface. The solid oxide fuel cell device according to claim 1, wherein the second region corresponds to the first region and the back surface of the second region corresponds to the first region. In claim 5,
Each of the plurality of convex portions has a bridge shape having a long side and a short side in a top view, and having a girder portion and a leg portion, and a solid oxide fuel cell device. In claim 6,
The plurality of convex portions are arranged so that the long side or the short side is inclined with respect to the direction in which the oxygen-containing gas or the exhaust gas flows onto the heat transfer plate in a top view. A solid oxide fuel cell device. In claim 7,
The plurality of convex portions in the first region are disposed so as to be inclined at the same direction and angle in a top view, and the first regions adjacent to each other with the second region interposed therebetween. Then, each said convex part is arrange | positioned so that it may mutually orthogonally cross in top view, The solid oxide fuel cell apparatus characterized by the above-mentioned. In claim 1,
The solid oxide fuel cell device comprises:
The fuel cell stack;
A reformer provided above the fuel cell stack for steam reforming the raw material gas into the fuel gas used for power generation;
A combustion chamber located above the fuel cell stack for heating the reformer by burning the remaining fuel gas and the oxygen-containing gas of the power generation,
The oxygen-containing gas introduction path and the exhaust gas discharge path are arranged on at least a part of the upper surface or the side surface of the container so that the exhaust gas discharge path is inside the oxygen-containing gas introduction path,
The solid oxide fuel cell, wherein the heat transfer plate is provided in at least one of the oxygen-containing gas introduction path or the exhaust gas discharge path so as to divide the flow path into two spaces. apparatus. In claim 9,
The heat transfer plate has a plurality of vent holes for flowing from one space into which the oxygen-containing gas or the exhaust gas is partitioned, together with a plurality of the convex portions, to the other space. Fuel cell device. In claim 10,
The heat transfer plate provided inside one of the oxygen-containing gas introduction path or the exhaust gas discharge path is connected to the other of the oxygen-containing gas introduction path or the exhaust gas discharge path via a plurality of the plurality of convex portions. A solid oxide fuel cell device, wherein the solid oxide fuel cell device is fixed to a wall surface constituting the structure. In claim 10,
The heat transfer plate provided on one of the oxygen-containing gas introduction path or the exhaust gas discharge path installed on the upper surface of the container, and the oxygen-containing gas introduction path or the exhaust gas discharge path installed on the side surface of the container The oxygen-containing gas or the exhaust gas is in contact with a wall surface that constitutes the other of the oxygen-containing gas introduction path or the exhaust gas discharge path of the two divided spaces. A solid oxide fuel cell device, wherein the fuel cell devices are combined and arranged so as to flow preferentially in space. In claim 10,
The heat transfer plate provided in at least one of the oxygen-containing gas introduction path and the exhaust gas discharge path disposed on the side surface of the container is provided above the upper end of the fuel cell stack. A solid oxide fuel cell device. In claim 13,
It has a partition plate having a plurality of holes for making the temperature of the oxygen-containing gas uniform inside the oxygen-containing gas introduction path and below the region where the heat transfer plate is provided. A solid oxide fuel cell device.

Images