JP6216901B1 - Layout structure of fuel cell system - Google Patents

Abstract

The present invention provides a fuel cell system arrangement structure with high maintainability. A fuel cell unit installed in a passage and a water heater connected to the fuel cell unit in a longitudinal direction of the passage and connected to the fuel cell unit through a pipe. A depth dimension in the passage width direction TW of one unit of the fuel cell unit 12 or the water heater unit 14 is set to be shorter than a depth dimension of the other unit, and maintenance of the other unit is performed. The maintenance surface is set on the one unit side. [Selection] Figure 3

Description

  The present invention relates to an arrangement structure of a fuel cell system.

  Conventionally, a fuel cell system that generates power using a chemical reaction between hydrogen and oxygen is known (see, for example, Patent Document 1).

  This fuel cell system includes a fuel cell unit and a heat storage unit. The fuel cell unit and the heat storage unit are arranged so that the discharge direction of the reformer exhaust gas from the reformer of the fuel cell unit and the discharge direction of the heating device exhaust gas from the heating device of the heat storage unit face each other, Both are fixed to the gantry and integrated.

  The fuel cell unit and the heat storage unit are arranged with a predetermined separation distance, and the separation distance is a distance that can secure an exhaust space and a maintenance space.

JP 2008-262849 A

  However, in such an arrangement structure of the fuel cell system, since the space between the fuel cell unit integrated with the gantry and the heat storage unit is a maintenance space, maintenance inspection workability (hereinafter referred to as maintenance property) There was a problem of being bad.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a fuel cell system arrangement structure with high maintainability.

In a first aspect, a fuel cell unit which generates electric power through the use of gas is provided in the passage, is arranged in the fuel cell unit in the longitudinal direction of the passage, it is connected via a pipe to the fuel cell unit A water heater unit that burns gas and supplies the hot water from the fuel cell unit to a set temperature and supplies the heated water to a set temperature , and the depth in the passage width direction of one of the fuel cell unit or the water heater unit The dimension is set to be shorter than the depth dimension of the other unit, the maintenance surface on which maintenance of the other unit is performed is set on the one unit side, and the gas pipe connected to the fuel cell unit and the water heater unit A connection point for connecting a connected gas pipe to a gas supply source is provided between the fuel cell unit and the water heater unit.

  That is, the depth dimension of one unit of the fuel cell unit or the water heater unit is set shorter than the depth dimension of the other unit. For this reason, even if it is a case where the space between the other unit and the passage side edge is not narrow, the space between the one unit and the passage side edge can be widened, and an access space can be secured.

  Thereby, by accessing from one side of the passage where one unit is arranged, the maintenance (maintenance inspection) of the other unit is possible, and the maintainability is improved. Further, even when the other side of the passage is installed in a closed bag path, the other unit can be maintained.

  In the second aspect, the maintenance surface of the other unit is set at the end of the passage in the length direction.

  That is, since the maintenance surface of the other unit is set on the length direction side of the passage, maintenance can be performed from the length direction of the passage.

  In the third aspect, the pipe extends from the maintenance surface side of the other unit.

  In other words, piping extends from the other unit from the maintenance surface side located on the one unit side.

  For this reason, wiring work becomes easy compared with the case where piping is extended from one unit and the opposite side. Further, the piping can be shortened, and the cost can be reduced.

  The maintainability can be improved by the arrangement structure of the fuel cell system of the first aspect.

1 is a perspective view showing a fuel cell system to which an arrangement structure of a fuel cell system according to a first embodiment of the present invention is applied. It is a block diagram which shows the fuel cell system of the embodiment. It is a top view which shows the arrangement structure of the fuel cell system of the embodiment. It is a top view which shows the arrangement structure of the fuel cell system which concerns on 2nd embodiment. It is a top view which shows the arrangement structure of the fuel cell system which concerns on 3rd embodiment.

(First embodiment)
Hereinafter, the arrangement structure of the fuel cell system according to the first embodiment will be described with reference to FIGS.

  As shown in FIG. 1, the fuel cell system 10 includes a fuel cell unit 12 that generates power using fuel gas and water, and a water heater that heats clean water heated by the fuel cell unit 12 to a target temperature. Unit 14.

  The casing 12a of the fuel cell unit 12 is formed in a rectangular parallelepiped shape whose width dimension is longer than the depth dimension. The width dimension from the left side surface 12e to the right side surface 12f located in the longitudinal direction NH is W1, the height dimension from the bottom surface 12g to the top surface 12h is H1, and the depth dimension from the front surface 12d to the rear surface 12c is located in the short side direction TH. Is D1, the width dimension W1 is longer than the depth dimension D1 (D1 <W1).

  In addition, the front surface 12d and the back surface 12c of the fuel cell unit 12 are names given for convenience of description, and do not limit the difference in the design of the surface or the orientation in the installed state. Further, the left side surface 12e and the right side surface 12f of the fuel cell unit 12 are also names given for convenience of explanation, and do not limit the difference in design of the surface or the direction in the installed state.

  The right side surface 12f of the casing 12a constitutes a fuel cell side maintenance surface 12b. Here, the maintenance surface refers to a surface that is partially or wholly opened during maintenance inspection. Examples of the fuel cell-side maintenance surface 12b include a door structure fixed to the frame via a hinge and a removable panel structure whose peripheral portion is fixed with screws. Thereby, maintenance inside the fuel cell unit 12 can be performed by opening the fuel cell side maintenance surface 12b.

  The fuel cell side maintenance surface 12b is provided with an exhaust port 13 which is an example of an exhaust part. Further, the fuel cell side maintenance surface 12b is provided with a piping / wiring section 12i for connecting piping and wiring so that piping and wiring connected to the fuel cell unit 12 extend. It is configured. Such maintenance surfaces may additionally be set, for example, on the top surface 12h, the back surface 12c, and the front surface 12d.

  The water heater unit 14 is formed in a rectangular parallelepiped shape whose height dimension is longer than the horizontal width and depth dimension, and includes a lower component part 16 constituting the lower side and a water heater body 18 constituting the upper side. An example of the lower component 16 is a stationary table.

  Here, although this embodiment demonstrates the case where the lower water heater main body 18 is installed in the lower part of the water heater main body 18, and the lower water heater main body 18 is installed, it is not limited to this. For example, in the case of a wall-hanging type in which the water heater main body 18 is installed on a building wall, the lower component 16 such as a table is not required.

  The casing 14a of the water heater unit 14 including the lower component 16 and the water heater body 18 has a width dimension from the left side surface 14e to the right side surface 14f as W2, and a height dimension from the bottom surface 14g to the top surface 14h as H2. When the depth dimension from 14d to the back surface 14c is D2, the height dimension H2 is longer than the width dimension W2 and the depth dimension D2 (H2> W2, H2> D2).

  In addition, the front surface 14d and the back surface 14c of the water heater unit 14 are names given for convenience of description, and do not limit the difference in the design of the surface or the orientation in the installed state. Moreover, the left side surface 14e and the right side surface 14f of the water heater unit 14 are also names given for convenience of explanation, and do not limit the difference in the design of the surface or the direction in the installed state.

  The right side surface of the casing 18a of the water heater body 18 (upper part of the right side surface 14f of the water heater unit 14) constitutes a water heater side maintenance surface 18b having an exhaust port, and the water heater side maintenance surface 18b is, for example, Examples thereof include a door structure fixed to the frame via a hinge and a removable panel structure whose peripheral portion is fixed with screws. Thereby, the maintenance inside the water heater main body 18 can be performed by opening the water heater side maintenance surface 18b.

  In addition, the right side surface of the casing 16a of the lower component 16 (the lower side of the right side surface 14f of the water heater unit 14) also constitutes a maintenance surface 16b, for example, and this maintenance surface 16b is connected to the frame via a hinge, for example. Examples include a fixed door structure and a removable panel structure in which the peripheral edge is fixed with screws. Thereby, maintenance of piping etc. which were connected to water heater main body 18 can be performed by opening maintenance surface 16b, for example.

  The depth dimension D2 of the water heater unit 14 is set to be shorter than the depth dimension D1 of the fuel cell unit 12.

  An example of dimensions will be described. The depth dimension D1 is set to 350 mm, and the depth dimension D2 is set to 250 mm. Here, as the water heater unit 14, standard types, slim types, and compact types having different external dimensions are prepared, and any type of water heater unit 14 may be used.

  As shown in FIG. 2, the fuel cell unit 12 of the fuel cell system 10 includes a fuel cell module 20 that generates power. The fuel cell module 20 is connected to a gas joint 22 via a gas supply path 21, and a gas pipe 24 is connected to the gas joint 22. From the gas pipe 24, a city gas mainly composed of methane, which is an example of a hydrocarbon raw material, or a liquefied petroleum gas mainly composed of propane / butane is supplied as a fuel. A desulfurization unit 26 is provided in the gas supply path 21, and sulfur and sulfur compounds contained in the supplied gas are removed by the desulfurization unit 26 and supplied to the fuel cell module 20. Note that FIG. 2 shows an example in which city gas is used.

  The fuel cell module 20 is connected to a reformed water tank 32 via a reformed water inflow passage 30 having a supply pump 28, and the fuel cell module 20 includes a modified water stored in the reformed water tank 32. Quality water is supplied by the supply pump 28. The fuel cell module 20 includes a reformer (not shown) that generates hydrogen and the like by reforming a city gas or liquefied petroleum gas and reformed water.

  The fuel cell module 20 includes a power generation unit (not shown) that generates power using hydrogen generated by the reformer and oxygen in the air sent by the blower 20a. The DC power from the power generation unit of the fuel cell module 20 is converted into AC power by the inverter circuit 38 and then supplied to the outside through the power cord 92 connected to the connection terminal 40.

  The fuel cell module 20 is connected to a discharge path 34 for discharging exhaust gas generated when gas is used for reforming or power generation. An exhaust heat exchanger 36 is provided in the discharge path 34, and the downstream side of the exhaust heat exchanger 36 is connected to the reforming water tank 32. The combustion exhaust gas from the fuel cell module 20 is cooled by the exhaust heat exchanger 36, and the contained water vapor is condensed. Thus, the combustion exhaust gas is divided into a liquid and a gas, and the liquid is sent to the reforming water tank 32 and reused as the reforming water. Further, as shown in FIG. 1, the gas is exhausted from the exhaust port 13 of the fuel cell side maintenance surface 12b.

  A supply path 42 is connected to the exhaust heat exchanger 36. The supply passage 42 is provided with a heat recovery pump 44 and a radiator 46, and the supply passage 42 is connected to a hot water storage tank 48 on the upstream side of the radiator 46. A heat transfer medium 50 is stored in the hot water storage tank 48, and water is used as an example of the heat transfer medium 50.

  The supply path 42 is connected to the lower part of the hot water storage tank 48, and the heat transfer medium 50 stored in the lower part of the hot water storage tank 48 is preferentially sent to the exhaust heat exchanger 36. The heat transfer medium 50 supplied from the hot water storage tank 48 to the supply path 42 is cooled by the radiator 46 and then sent to the exhaust heat exchanger 36 by the heat recovery pump 44. The radiator 46 includes a radiator fan (not shown), and operates the fan motor as necessary, such as when the supplied heat transfer medium 50 is hot.

  A discharge path 52 is connected to the exhaust heat exchanger 36, and the heat transfer medium 50 that has passed through the exhaust heat exchanger 36 is returned to the hot water storage tank 48 via the discharge path 52. The discharge path 52 is connected to the upper part of the hot water storage tank 48. The heat of the combustion exhaust gas from the fuel cell module 20 is transferred to the heat transfer medium 50 by the exhaust heat exchanger 36, and the heat transfer medium 50 heated by this heat is returned to the upper part of the hot water storage tank 48.

  The heat transfer medium 50 stored in the hot water storage tank 48 is returned to the hot water storage tank 48 via a circulation path 58 having a water heat exchanger 54 and a heating pump 56. The heat pump 56 operates when heating the clean water with the heat transfer medium 50 of the hot water storage tank 48.

  The upstream side of the circulation path 58 is connected to the upper part of the hot water storage tank 48, and the heat transfer medium 50 stored in the upper part of the hot water storage tank 48 is preferentially supplied to the hot water heat exchanger 54. The downstream side of the circulation path 58 is connected to the lower part of the hot water storage tank 48, and the heat transfer medium 50 that has been deprived of heat by the hot water heat exchanger 54 is returned to the lower side of the hot water storage tank 48.

  An inflow path 60 having an inflow side branch point 60 a is connected to the water heat exchanger 54. The inflow path 60 is connected to the inlet side pipe joint 62. The inlet side pipe joint 62 is connected to a water supply pipe 64 of, for example, a water pipe, and clean water is supplied to the inflow path 60.

  An outflow channel 66 is connected to the water heat exchanger 54. The outflow channel 66 is provided with an outflow side branch point 66a, and a supplemental water channel 70 having a supplementary water valve 68 is connected to the outflow side branch point 66a. The supplementary water passage 70 is connected to the upper part of the hot water storage tank 48, and by opening the supplementary water valve 68, the upper water from the upper water heat exchanger 54 is supplied from the upper part of the hot water storage tank 48 as the heat transfer medium 50. be able to.

  A mixing valve 72 is provided downstream of the outflow path 66 on the outflow side branch point 66a. The mixing valve 72 is connected to the inflow side branch point 60 a via the bypass path 74. The mixing valve 72 is a valve that mixes the clean water from the inflow channel 60 and the clean water from the clean water heat exchanger 54, and for example, from the inflow channel 60 so that the outflow temperature becomes a predetermined set temperature. The mixing ratio of clean water and clean water from the clean water heat exchanger 54 is adjusted.

  An outlet joint 76 is connected downstream of the mixing valve 72 in the outflow passage 66, and the outlet joint 76 is connected to a water inlet joint 80 of the water heater unit 14 via a hot water pipe 78.

  A gas pipe 24 is connected to the gas joint 82 of the water heater unit 14, and liquefied petroleum gas mainly containing city gas or propane / butane is supplied to the water heater unit 14 from the gas pipe 24. A hot water supply pipe 86 is connected to the hot water supply joint 84 of the water heater unit 14. This water heater unit 14 burns liquefied petroleum gas whose main component is city gas or propane / butane, thereby heating the water supplied from the water inlet joint 80 to a temperature set by a remote controller (not shown). It is supplied by a hot water supply pipe 86.

In the present embodiment, the case where the gas pipe 24 from the fuel cell unit 12 and the gas pipe 24 from the water heater unit 14 are connected to each other and connected to the gas supply source has been described .
On the other hand, the gas pipe 24 from the fuel cell unit 12 and the gas pipe 24 from the water heater unit 14 may be independently connected to a gas supply source.

  FIG. 3 is a diagram showing an arrangement structure of the fuel cell system 10, in which the fuel cell system 10 is installed in a passage 90 extending along an adjacent land boundary line (other side edge 90 b of the passage 90 described later). It is shown. The passage 90 is configured by a narrow path in which one side I in the length direction N is closed.

  In this passage 90, the fuel cell unit 12 is installed on one I side in the length direction N, and the fuel cell side maintenance surface 12b is arranged on the other T side in the length direction N. . As an example, the fuel cell unit 12 is disposed near the one side edge 90a of the passage 90 in the passage width direction TW, and the back surface 12c of the fuel cell unit 12 is located on the one side edge 90a side. Has been placed.

  A water heater unit 14 is installed on the other T side in the length direction N of the passage 90 from the fuel cell unit 12. Thus, the fuel cell side maintenance surface 12b of the fuel cell unit 12 is configured to be positioned on the hot water heater unit 14 side.

  The water heater unit 14 is arranged so that the water heater side maintenance surface 18b of the water heater body 18 and the maintenance surface 16b of the lower component 16 are located on the other T side (see FIG. 1). This water heater unit 14 is also arranged near one side edge 90a of the passage 90 in the passage width direction TW, and the back surface 14c of the water heater unit 14 is arranged on the one side edge 90a side.

  From the fuel cell side maintenance surface 12b side of the fuel cell unit 12, a gas pipe 24, a hot water discharge pipe 78, and a water supply pipe 64 extend. Each of the tubes 24, 64, and 78 extends from the side edge 90 a side of the passage 90 on the right side surface 12 f of the fuel cell unit 12, and is routed along the side edge 90 a of the passage 90.

  The water supply pipe 64 is connected to a water pipe, and the gas pipe 24 is connected to the left side 14e of the water heater unit 14 and to the gas main pipe. Further, the hot water discharge pipe 78 is connected to the left side surface 14 e of the water heater unit 14.

  From the fuel cell side maintenance surface 12b side of the fuel cell unit 12, a power cord 92 having a power supply line for supplying power to the fuel cell unit 12 and a supply line for supplying power generated by the fuel cell unit 12 extends. . The power supply line and the supply line may be shared by the same line. Further, from the fuel cell-side maintenance surface 12b, for example, a current monitoring line, a remote control line, a power generation outlet during a power failure, a power supply line connected to the water heater unit 14, and the like may be extended.

  The power cord 92 extends from the side edge 90 a side of the passage 90, and is routed along the side edge 90 a of the passage 90. The power cord 92 is connected to a switchboard 94 provided on the side edge 90 a side of the passage 90, and is connected to a commercial power supply via the switchboard 94.

  In the present embodiment, the case where the switchboard 94 is provided between the fuel cell unit 12 and the water heater unit 14 has been described as an example, but the present invention is not limited to this. If the operator can access and maintain the switchboard 94, for example, one I side of the fuel cell unit 12, the back side of the fuel cell unit 12, the back side of the water heater main body 18, and the other T from the water heater main body 18. It may be provided on the side.

  A hot water supply pipe 86 extends from the back surface 14 c side from the water heater unit 14, and the hot water supply pipe 86 is routed to a location where hot water is used in the building 110. Further, a power cord 96 extends from the back surface 14c side from the water heater unit 14, and the power cord 96 is connected to a commercial power source. The power cord 96 may be connected to the fuel cell unit 12 instead of the commercial power source.

  Here, the minimum distance from the adjacent land boundary line that forms the other side edge 90b of the passage 90 to the building 110 that forms the one side edge 90a of the passage 90 defines the separation distance from the adjacent land boundary line to the outer wall 110a of the building 110. It is stipulated by the law (restrictions on buildings near the boundary: Article 234 of the Civil Code).

  The adjacent land boundary line constituting the other side edge 90b of the passage 90 indicates a boundary line between adjacent sites, and the one side edge 90a of the passage 90 indicates a boundary with the outer wall 110a of the building 110. And the passage 90 shows the elongate area | region (for example, 560 mm or more) in the length direction N formed along the building 110 between the adjacent boundary line and the outer wall 110a of the building 110.

  The depth dimension D1 of the fuel cell unit 12 is equal to the front surface 12d of the fuel cell unit 12 and the passage even if a space of a separation distance R1 that is an installation condition is secured between the fuel cell unit 12 and one side edge 90a of the passage 90. It is set so that the first space 100 having the first passage width TW1 can be formed between the other side edges 90b of the 90.

  On the other hand, the depth dimension D2 of the water heater unit 14 is set shorter than the depth dimension D1 of the fuel cell unit 12. And even if the space of the separation distance R2 which is installation conditions is ensured between the water heater unit 14 and the one side edge 90a of the passage 90, the front side 14d of the water heater unit 14 and the other side edge 90b of the passage 90 are A depth dimension D2 of the water heater unit 14 is set so that a second space 102 having a second passage width TW2 wider than the first passage width TW1 can be formed therebetween.

  For example, the case where the passage width TW0 is installed in the passage 90 having a length of 560 mm will be specifically described. Based on the installation conditions, the separation distance R1 between the fuel cell unit 12 and one side edge 90a of the passage 90 is set to 10 mm. The depth dimension D1 of the fuel cell unit 12 in the passage width direction TW is 350 mm. From these, the first passage width TW1 between the fuel cell unit 12 and the other side edge 90b of the passage 90 is 200 mm.

  Further, the separation distance R2 between the water heater unit 14 and the one side edge 90a of the passage 90 is set to 10 mm based on the installation conditions. The depth dimension D2 of the water heater unit 14 in the passage width direction TW is 250 mm. Accordingly, the second passage width TW2 between the water heater unit 14 and the other side edge 90b of the passage 90 is 300 mm, and the second space 102 having the second passage width TW2 forms an access space through which a person can pass. be able to.

  The minimum distance from the adjacent boundary line to the outer wall 110a of the building 110 based on “restriction of buildings near the boundary line” is 500 mm. When the passage width TW0 is 500 mm, the second passage width TW2 is 240 mm. Even in this case, the second space 102 can form an access space through which a person can pass.

  Next, the operation and effect of this embodiment will be described.

  In the present embodiment, the fuel cell unit 12 and the water heater unit 14 are not fixed and can be arranged at arbitrary positions. For this reason, compared with the case where the fuel cell unit 12 and the water heater unit 14 are integrated and positioned by a gantry, the degree of freedom of arrangement is improved and the carrying into the installation place is facilitated.

  The depth dimension D2 of the water heater unit 14 is set shorter than the depth dimension D1 of the fuel cell unit 12. For this reason, even if the first passage width TW1 of the first space 100 formed between the fuel cell unit 12 and the other side edge 90b of the passage 90 is narrow and cannot enter, the water heater unit 14 and the passage 90 are provided. The second passage width TW2 of the second space 102 formed between the other side edge 90b can be increased, and an access space to the fuel cell side maintenance surface 12b can be secured.

  Thereby, the fuel cell unit 12 can be maintained by accessing from the other T side of the passage 90 where the water heater unit 14 is arranged, and the maintainability is improved. In addition, since the fuel cell side maintenance surface 12b is on the other T side as in the present embodiment, maintenance is possible even when one of the passages 90 is installed in a closed bag path.

  Therefore, it is possible to improve the maintainability while maintaining the degree of freedom of arrangement.

  At this time, the fuel cell side maintenance surface 12 b of the fuel cell unit 12 is set on the length direction N side of the passage 90. For this reason, compared with the case where the fuel cell side maintenance surface 12b is set in the passage width direction TW of the passage 90, maintenance can be performed without being restricted by the passage width TW0.

  Further, from the fuel cell unit 12, the piping and wiring of the gas pipe 24, the water supply pipe 64, and the hot water discharge pipe 78 extend from the fuel cell side maintenance surface 12 b side located on the water heater unit 14 side.

  For this reason, compared with the case where each pipe | tube 24,64,78 extends from the hot water supply unit 14 and the opposite side, a wiring operation becomes easy. Moreover, the routed piping and wiring can be shortened, and cost reduction can be achieved.

  In addition, in this embodiment, although the depth dimension D2 of the water heater unit 14 was set shorter than the depth dimension D1 of the fuel cell unit 12, it is not limited to this. For example, the depth dimension D1 of the fuel cell unit 12 may be set shorter than the depth dimension D2 of the water heater unit 14, and in this case, the arrangement of the fuel cell unit 12 and the water heater unit 14 is changed.

  In the present embodiment, the right side surface of the fuel cell unit 12 is the fuel cell side maintenance surface 12b, and the fuel cell side maintenance surface 12b is set to the length direction N side of the passage 90. However, the present invention is not limited to this. Absent.

  For example, the fuel cell side maintenance surface may be provided on the front surface 12d, the back surface 12c, or the top surface 12h of the fuel cell unit 12. The fuel cell side maintenance surface provided on the front surface 12d, the back surface 12c, and the top surface 12h is provided in place of the fuel cell side maintenance surface 12b on the right side surface of the fuel cell unit 12, and the fuel cell on the right side surface of the fuel cell unit 12 is provided. It may be provided in addition to the side maintenance surface 12b.

  Moreover, in this embodiment, the case where the right side surface of the water heater main body 18 in the water heater unit 14 constitutes the water heater side maintenance surface 18b and the right side surface of the lower component part 16 constitutes the maintenance surface 16b is taken as an example. Although described, the present invention is not limited to this.

  For example, the left side surface of the water heater main body 18 in the water heater unit 14 may be a hot water heater side maintenance surface, and the left side surface of the lower component 16 may be a maintenance surface. In this case, maintenance of the fuel cell unit 12 and the water heater unit 14 can be performed in the space between the fuel cell unit 12 and the water heater unit 14. Further, the hot water heater side maintenance surface 18b of the hot water heater body 18 and the maintenance surface 16b of the lower component 16 may be provided in opposite directions.

  In the present embodiment, the fuel cell unit 12 is arranged on one I side in the length direction N of the passage 90 and the water heater unit 14 is arranged on the other T side. However, the present invention is not limited to this.

  For example, if one I side of the passage 90 is open, the water heater unit 14 may be disposed on one I side of the passage 90 and the fuel cell unit 12 may be disposed on the other T side. In this case, the fuel cell unit 12 is arranged so that the fuel cell side maintenance surface 12b is positioned on the hot water heater unit 14 side.

(Second embodiment)
FIG. 4 is a diagram showing the second embodiment, and the front surface 14d of the water heater main body 18 of the water heater unit 14 may be the hot water heater side maintenance surface 18c, and the front surface of the lower component 16 may be the maintenance surface. When such a water heater unit 14 is installed in the passage 90 having the wide wide region 120, each maintenance surface 18c of the water heater unit 14 is arranged in the passage width direction TW.

  Thereby, maintenance can be performed from the wide area 120 and exhaust from the exhaust port of the hot water heater side maintenance surface 18 c can be discharged toward the wide area 120.

  In the present embodiment, the fuel cell unit 12 is arranged on the left side of the passage 90 in FIG. 4, the water heater unit 14 is arranged in the wide area 120 on the right side of the passage 90, and each maintenance surface 18 c has a passage width direction TW. Although the water heater unit 14 is installed so as to face, it is not limited to this.

  For example, when the wide region 120 is formed on the left side of the passage 90, the water heater unit 14 may be disposed on the wide portion 120 on the left side of the passage 90 and the fuel cell unit 12 may be disposed on the right side of the passage 90. In this case, it installs so that each maintenance surface 18c of the water heater unit 14 may face the passage width direction TW.

(Third embodiment)
FIG. 5 is a diagram showing a third embodiment, in which the fuel cell system 10 is installed at a corner portion of a passage 90 formed along a corner portion of a building 110.

  In the present embodiment, the fuel cell unit 12 is installed in the passage 90 portion located on the upper side in FIG. 5, and the water heater unit 14 is installed in the passage 90 portion located on the left side in FIG.

  In the extending direction of the passage 90, the fuel cell unit 12 is arranged so that the fuel cell side maintenance surface 12b of the fuel cell unit 12 having a long depth dimension D1 faces the hot water heater unit 14 side having a short depth dimension D2. Yes.

  Even with such an arrangement structure, the same effects as those of the first embodiment can be achieved.

  In each embodiment, although each piping etc. were explained when it was wired between fuel cell unit 12 and building 110, it is not limited to this. For example, it may be routed in a passage on the opposite side of the fuel cell unit 12 and the building 110, routed in a lower space of the fuel cell unit 12, or routed in the ground below the fuel cell unit 12.

DESCRIPTION OF SYMBOLS 10 Fuel cell system 12 Fuel cell unit 12b Fuel cell side maintenance surface 14 Water heater unit 24 Gas pipe 64 Water supply pipe 78 Hot water pipe 90 Passage 90a One side edge I One T Other N Length direction TW Passage width direction

Claims (3)

A fuel cell unit installed in the passage and generating electricity using gas ;
The fuel cell unit is juxtaposed to the fuel cell unit in the length direction of the passage, and connected to the fuel cell unit through a pipe . The gas is burned to heat the water from the fuel cell unit to a set temperature. A water heater unit to supply,
With
The depth dimension in the passage width direction of one unit of the fuel cell unit or the water heater unit is set shorter than the depth dimension of the other unit, and a maintenance surface on which maintenance of the other unit is performed is on the one unit side. Set ,
A connection point for connecting a gas pipe connected to the fuel cell unit and a gas pipe connected to the water heater unit to a gas supply source is provided between the fuel cell unit and the water heater unit. arrangement of the fuel cell system has.   The arrangement structure of the fuel cell system according to claim 1, wherein the maintenance surface of the other unit is set at an end of the passage in the length direction.   The arrangement structure of the fuel cell system according to claim 1, wherein the pipe extends from the maintenance surface side of the other unit.