JP2015117932A - Cogeneration system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cogeneration system capable of reducing manufacturing cost related to a power generation unit housing and a hot water storage unit housing.SOLUTION: A cogeneration system includes: a power generation unit 2 generating electricity; and a hot water storage unit 4 recovering heat generated in the power generation unit 2 as hot water. The power generation unit 2 includes a power generation unit housing 8 accommodating therein power generation means, and the hot water storage unit 4 includes a hot water storage unit housing 14 accommodating therein a hot water storage tank. At a time of installation and construction, a specific side panel 68 of the power generation unit housing 8 is detached, the power generation unit housing 8 is connected and joined to the hot water storage unit housing 14, a power generation unit space in the power generation unit housing 8 is communicated with a hot water storage unit space in the hot water storage unit housing 14, and, furthermore, the specific side panel 68 is attached as a side panel of the hot water storage unit housing 14.

Description

  The present invention relates to a cogeneration system including a power generation unit for generating power and a hot water storage unit for recovering heat generated in the power generation unit as hot water.

  In recent years, a cogeneration system that generates power by a power generation unit and collects heat generated during the power generation as hot water in a hot water storage unit has been put to practical use (see, for example, Patent Document 1). As shown in FIGS. 11 and 12, the cogeneration system includes a power generation unit 102 and a hot water storage unit 108. The power generation unit 102 includes a fuel cell 104 (power generation means) that generates power using fuel gas as raw fuel. The fuel cell 104 is disposed in the power generation unit housing 106. The hot water storage unit 108 includes a hot water storage tank 110 that stores heat as hot water, and the hot water storage tank 110 is disposed in the hot water storage unit housing 112.

  The power generation unit 102 further includes a reformer 114, which includes, for example, a reformer 116 and a carbon monoxide converter 118, and heat exchange for the reformer is associated with the reformer 116. A transformer 120 is disposed, and a transformer heat exchanger 122 is disposed in association with the carbon monoxide transformer 118. Further, a cooling water heat exchanger 124 is disposed in association with the fuel cell 104. These heat exchangers 120, 122, and 124 are such that the high-temperature one is located on the upper side in the power generation unit housing 106, the transformer heat exchanger 122, the reformer heat exchanger 120, and the cooling water heat exchanger 124. Are arranged in this order from bottom to top.

  Further, in the hot water storage unit 108, an outflow portion 126 is provided at the bottom of the hot water storage tank 110, an inflow portion 128 is provided at the upper end thereof, and the outflow portion 126 and the inflow portion 128 are connected via a hot water circulation channel 130. ing.

  In such a cogeneration system, the power generation unit 102 is manufactured by the power generation unit manufacturer, the hot water storage unit 108 is manufactured by the hot water storage unit manufacturer, and the power generation unit 102 and the hot water storage unit 108 are installed at the installation location. Connected as required. On the power generation unit 102 side, a pipe connection portion 132 is provided in the lower portion, and a gas connection portion 134, an outflow side connection portion 136, and an inflow side connection portion 138 are provided in the pipe connection portion 132. In addition, on the hot water storage unit 108 side, a pipe connection part 140 is provided at the lower part, and a water connection part 142, a hot water connection part 144, an outflow side connection part 146 and an inflow side connection part 148 are provided in the pipe connection part 140. Is provided.

  When constructing this cogeneration system at the installation site, the gas pipe 150 is connected to the gas connection part 134 on the power generation unit 102 side, and the tap water pipe is connected to the water connection part 142 on the hot water storage unit 108 side. 152 is connected, and the hot water supply pipe 154 is connected to the hot water connection portion 144. Further, the outflow side connection portion 146 on the hot water storage unit 108 side and the inflow side connection portion 138 on the power generation unit 102 side are connected via an upstream pipe 156, and the inflow side connection portion 148 on the hot water storage unit 108 side and the power generation unit 102 side are connected. Are connected to the outflow side connection portion 136 via the downstream side pipe 158.

  When connected in this manner, the connection state shown in FIG. 11 is obtained, and the hot water in the hot water storage tank 110 flows from the outflow portion 126 to the upstream pipe 156 through the first flow path portion 160, and the second flow on the power generation unit 102 side. It flows into the downstream pipe 158 through the passage 162 and further flows into the hot water storage tank 110 from the inflow portion 128 through the third flow path portion 164 on the hot water storage unit 108 side. Since the stored hot water flows in this way, the first flow path 160 on the hot water storage unit 108 side, the upstream pipe 156, the second flow path 162 on the power generation unit 102 side, the downstream pipe 158, and the third on the hot water storage unit 108 side. The flow path part 164 constitutes the hot water storage water circulation flow path 130, and the water (hot water) flowing through the second flow path part 162 on the power generation unit 102 side is the heat exchanger 122 for the transformer, the heat exchanger 120 for the reformer, and the cooling. It flows through the water heat exchanger 124 in this order and is heated by heat exchange.

JP2013-12381A

  However, such a cogeneration system has the following problems to be solved. Since the power generation unit 102 and the hot water storage unit 108 are installed at an interval, a power generation unit housing 106 is provided on the power generation unit 102 side, and the fuel cell 104 and the reformer 114 are covered by the power generation unit housing 106. ing. A hot water storage unit housing 112 is provided on the hot water storage unit 108 side, and the hot water storage tank 110 and the like are covered by the hot water storage unit housing 112. Thus, since it is necessary to provide separate housings for protection on the power generation unit 102 side and the hot water storage unit 108 side, there is a problem that the manufacturing cost increases in relation to the power generation unit housing 106 and the hot water storage unit housing 112.

  Further, in connection with the hot water circulation channel 130, the second channel 162 passes through the upstream side pipe 156 through the transformer heat exchanger 122, the reformer heat exchanger 120, and the cooling water heat exchanger 124. The third flow path portion 164 extends from the downstream side pipe 158 upward to the inflow portion 128 of the hot water storage tank 110, and thus extends downward to the downstream side pipe 158. In relation to the second and third flow path portions 162, 164 of the water circulation flow path 130, the flow path lengths thereof become longer, and as a result, the heat loss of the hot water circulation flow path 130 increases, and the entire system There is a problem that the overall thermal efficiency of the is reduced.

  The objective of this invention is providing the cogeneration system which can aim at reduction of a manufacturing cost regarding a power generation unit housing and a hot water storage unit housing.

  Another object of the present invention is to provide a cogeneration system capable of improving the overall thermal efficiency of the entire system by reducing the heat loss in relation to the hot water circulation path.

The cogeneration system according to claim 1 of the present invention is a cogeneration system including a power generation unit for generating power and a hot water storage unit for recovering heat generated in the power generation unit as hot water,
The power generation unit includes a power generation unit that generates power, and a power generation unit housing that houses the power generation unit, and the hot water storage unit includes a hot water storage tank that stores hot water, and a hot water storage unit housing that stores the hot water storage tank. Have
During installation of the power generation unit and the hot water storage unit, the power generation unit side specific panel of the power generation unit housing is removed, and the power generation unit housing and the hot water storage unit housing are connected to each other, thereby generating power in the power generation unit housing. The unit space and the hot water storage unit space in the hot water storage unit housing communicate with each other, and the power generation unit side specific panel is attached as a specific surface panel of the hot water storage unit housing.

  In the cogeneration system according to claim 2 of the present invention, the power generation unit and the hot water storage unit are configured to be connected and connected in a lateral direction, and the power generation unit side specific panel is provided in the power generation unit housing. A specific side panel, and when the power generation unit and the hot water storage unit are installed and constructed, the specific side panel of the power generation unit housing is removed, and the power generation unit housing and the hot water storage unit housing are connected and connected in the lateral direction. The power generation unit space in the power generation unit housing and the hot water storage unit space in the hot water storage unit housing are communicated in the lateral direction, and the specific side panel is attached as a side panel of the hot water storage unit housing. And

  In the cogeneration system according to claim 3 of the present invention, the first specific side surface and the second specific side surface of the hot water storage unit housing are opened, and the specific unit is installed when the power generation unit and the hot water storage unit are installed. The power generation unit housing and the hot water storage unit housing are connected and connected so that the side opening from which the side panel is removed communicates with the opening on the first specific side, and the specific side panel removed from the power generation unit housing is connected to the power generation unit housing. It is attached to the opening of the second specific side surface as the side panel of the hot water storage unit housing.

  In the cogeneration system according to claim 4 of the present invention, a first simple side panel and a second simple side panel are attached to the first specific side surface and the second specific side surface of the hot water storage unit housing, When the power generation unit and the hot water storage unit are installed, the power generation unit housing and the hot water storage unit housing are connected so that the side opening from which the specific side panel is removed communicates with the side opening from which the first simple side panel is removed. The specific side panel connected and removed from the power generation unit housing is attached to a side opening from which the second simplified side panel is removed as the side panel of the hot water storage unit housing.

  Further, in the cogeneration system according to claim 5 of the present invention, the power generation means of the power generation unit is constituted by a fuel cell, and cooling water for cooling the fuel cell is circulated in association with the fuel cell. A cooling water circulation channel and a cooling water heat exchanger disposed in the cooling water circulation channel are provided, and the fuel cell, the cooling water circulation channel, and the cooling water heat exchanger are disposed in the power generation unit housing. In addition, a hot water circulation channel through which hot water in the hot water tank is circulated is provided in relation to the hot water storage tank, and the hot water circulation channel passes through the hot water storage unit space from the bottom of the hot water storage tank. The hot water storage unit extends from the upper part of the power generation unit space to the power generation unit space, extends upward in the power generation unit space through the cooling water heat exchanger Through the top between and being connected to the upper portion of the hot water storage tank.

  Further, in the cogeneration system according to claim 6 of the present invention, the hot water circulation path through which the hot water in the hot water storage tank is circulated extends from the hot water storage unit housing into the power generation unit housing. A path portion, an intermediate flow path portion extending upward in the power generation unit housing, and a downstream flow path portion extending from the power generation unit housing into the hot water storage unit housing, the upstream side of the hot water circulation flow path A flow path and / or a part of the downstream flow path is a common connection used when the hot water storage unit is connected and connected to one side of the power generation unit and when the hot water storage unit is connected and connected to the other side of the power generation unit. It is characterized by comprising piping.

  In the cogeneration system according to claim 7 of the present invention, the power generation unit and the hot water storage unit are configured to be connected in a vertical direction, and the power generation unit side specific panel is provided in the power generation unit housing. When the power generation unit and the hot water storage unit are installed, the hot water storage unit housing is disposed on the upper side or the lower side of the power generation unit housing by removing the upper surface panel or the lower surface panel of the power generation unit housing. The power generation unit space in the power generation unit housing and the hot water storage unit space in the hot water storage unit housing communicate with each other in the vertical direction, and the upper panel or the lower panel is connected to the hot water storage. Upper surface of unit housing Characterized in that attached as a panel or bottom panel.

  In the cogeneration system according to claim 8 of the present invention, the lower surface and the upper surface of the hot water storage unit housing are opened, and the upper surface panel of the power generation unit housing is installed when the power generation unit and the hot water storage unit are installed. Alternatively, the power generation unit housing and the hot water storage unit housing are connected and connected so that the upper surface opening or the lower surface opening from which the lower surface panel is removed and the lower surface or the upper surface opening of the hot water storage unit housing communicate with each other. The upper panel or the lower panel removed from the housing is attached to the opening of the upper surface or the lower surface of the hot water storage unit housing as the upper panel or the lower panel of the hot water storage unit housing.

  Furthermore, in the cogeneration system according to claim 9 of the present invention, a simple upper panel and a simple lower panel are attached to the upper surface and the lower surface of the hot water storage unit housing, and when the power generation unit and the hot water storage unit are installed and constructed. The power generation unit is configured such that the upper surface opening or the lower surface opening of the power generation unit housing from which the upper surface panel or the lower surface panel is removed communicates with the lower surface opening from which the simplified lower surface panel is removed or the upper surface opening from which the simplified upper surface panel is removed. A housing and the hot water storage unit housing are connected and connected, and the upper surface panel or the lower surface panel removed from the power generation unit housing is used as the upper surface panel or the lower surface panel of the hot water storage unit housing. Above removed Characterized in that it is attached to the opening or the lower surface opening detaching the simple lower panel.

  According to the cogeneration system of the first aspect of the present invention, the power generation unit has a power generation unit housing that stores power generation means, the hot water storage unit has a hot water storage unit housing that stores a hot water storage tank, and the power generation unit and hot water storage When installing the unit, the power generation unit housing and the hot water storage unit housing are connected and connected by removing the specific panel of the power generation unit housing, so that the power generation unit space in the power generation unit housing and the hot water storage unit space in the hot water storage unit housing communicate with each other. The panel having the surface corresponding to the communication space is not necessary, and thus the manufacturing cost can be reduced in relation to the power generation unit housing and the hot water storage unit housing. Further, since the power generation unit space and the hot water storage unit space are communicated with each other, a hot water storage water circulation channel can be provided through this communication space. Furthermore, since the specific panel of the power generation unit housing is removed and used as the specific surface panel of the hot water storage unit housing, the specific surface panel can be effectively used.

  Further, according to the cogeneration system according to claim 2 of the present invention, when installing the power generation unit and the hot water storage unit, the specific side panel of the power generation unit housing is removed, and the power generation unit housing and the hot water storage unit housing are laterally moved. Since they are connected and connected, the power generation unit space in the power generation unit housing communicates with the hot water storage unit space in the hot water storage unit housing, and a side panel corresponding to this communication space becomes unnecessary. Further, since the specific side panel of the power generation unit housing is removed and used as the side panel of the hot water storage unit housing, the specific side panel can be effectively used.

  According to the cogeneration system according to claim 3 of the present invention, the first specific side surface and the second specific side surface of the hot water storage unit housing are opened at the time of shipment from the factory, and such a hot water storage unit housing is provided. In the construction, the power generation unit and the hot water storage unit can be constructed as follows. The power generation unit housing and the hot water storage unit housing are connected and connected so that the side surface opening from which the specific side panel is removed on the power generation unit side and the side surface opening on the first specific side surface on the hot water storage unit side are in communication with each other. The specific side panel is attached to the second specific side surface of the hot water storage unit housing. By doing so, the power generation means that is an important component can be shipped to the factory in a protected state covered with the power generation unit housing. In addition, on the hot water storage unit housing side, the side panels corresponding to the first and second specific side surfaces can be omitted, and the manufacturing cost of the hot water storage unit housing can be reduced.

  Moreover, according to the cogeneration system of Claim 4 of this invention, the 1st simple side panel and the 2nd simple side panel are attached to the 1st specific side surface and 2nd specific side surface of a hot water storage unit housing, In the embodiment provided with such a hot water storage unit housing, the construction of the power generation unit and the hot water storage unit can be performed as follows. The power generation unit housing and the hot water storage unit housing are connected and connected so that the side opening from which the specific side panel is removed communicates with the side opening from which the first simplified side panel is removed. Moreover, the specific side panel removed from the power generation unit housing is attached to the side opening from which the second simplified side panel is removed as a side panel in the hot water storage unit housing. In this way, the power generation means can be shipped from the factory in a protected state covered with the power generation unit housing, and the hot water storage tank etc. is also partially protected with a hot water storage unit housing covered by a simple side panel. Can be shipped from the factory. In addition, an inexpensive one can be used for the first and second simple side panels, and in this connection, the manufacturing cost of the hot water storage unit housing can be reduced. In addition, about the 1st and 2nd simple side panel removed from the hot water storage unit housing, it is possible to reuse, and it can aim at the further reduction of manufacturing cost by reusing.

  According to the cogeneration system according to claim 5 of the present invention, the power generation means is constituted by a fuel cell, and in connection with this fuel cell, a coolant circulation flow for cooling the fuel cell in the power generation unit housing. A hot water storage passage is provided in connection with the hot water storage tank, and a hot water circulation passage through which the hot water in the hot water storage tank is circulated is provided from the bottom of the hot water storage tank. It extends to the power generation unit space through the space, extends through the power generation unit space through the cooling water heat exchanger, and is further connected from the upper part of the power generation unit space to the upper end of the hot water storage tank through the upper part of the hot water storage unit space. As a result, the length of the hot water circulation channel can be shortened, and a part of the hot water circulation channel extends from the top of the power generation unit space to the upper part of the hot water storage unit space. The heated hot water that extends in a straight line flows into the hot water storage tank on the hot water storage unit side through the high temperature region of the power generation unit space and the hot water storage unit space, and as a result, heat loss in the hot water storage circulation path can be reduced. At the same time, the thermal efficiency of the entire system can be improved.

  Further, according to the cogeneration system according to claim 6 of the present invention, a part of the upstream side flow path part and / or the downstream side flow path part of the hot water storage water circulation path through which the hot water stored in the hot water storage tank is circulated is provided. Since the hot water storage unit is connected and connected to one side of the power generation unit, and when the hot water storage unit is connected and connected to the other side of the power generation unit, the hot water storage water circulation channel is used using this common connection pipe. The hot water storage unit side and the power generation unit side can be connected as required, thereby reducing the types of connection pipes used for installation.

  According to the cogeneration system of claim 7 of the present invention, the power generation unit housing and the hot water storage unit housing are removed by removing the upper surface panel (or the lower surface panel) of the power generation unit housing when installing the power generation unit and the hot water storage unit. Are connected in the vertical direction, the power generation unit space in the power generation unit housing communicates with the hot water storage unit space in the hot water storage unit housing, and a panel corresponding to this communication space becomes unnecessary. Further, since the upper panel (or lower panel) of the power generation unit housing is removed and used as the upper panel (or lower panel) of the hot water storage unit housing, the upper panel (or lower panel) can be effectively used. .

  According to the cogeneration system according to claim 8 of the present invention, the upper surface and the lower surface of the hot water storage unit housing are opened at the time of factory shipment. And the construction of the hot water storage unit can be performed as follows. Hot water storage on the upper side (or lower side) of the power generation unit housing so that the upper surface opening (or lower surface) from which the upper panel (or lower surface panel) on the power generation unit side is removed communicates with the lower surface (or upper surface) opening on the hot water storage unit side. The unit housing is connected and connected, and the upper panel (or the lower panel) removed from the power generation unit housing is attached to the upper surface (or the lower surface) of the hot water storage unit housing. Can be shipped from the factory in a protected state covered with the power generation unit housing, and on the hot water storage unit housing side, the upper panel and the lower panel can be omitted, thereby reducing the manufacturing cost of the hot water storage unit housing. Can do.

  Furthermore, according to the cogeneration system according to claim 9 of the present invention, the upper surface and the lower surface of the hot water storage unit housing are attached with the simplified upper panel and the lower simplified side panel, and the hot water storage unit housing is provided. In the embodiment, construction of the power generation unit and the hot water storage unit can be performed as follows. The upper side (or lower side) of the power generation unit housing so that the opening on the power generation unit side from which the upper panel (or lower surface panel) is removed communicates with the opening on the lower surface (or upper surface) from which the simple lower surface panel (or simple upper panel) is removed. ) Is connected to the hot water storage unit housing. Moreover, the upper surface panel (or lower surface panel) removed from the power generation unit housing is the upper surface (or lower surface) from which the simplified upper surface panel (or simplified lower surface panel) is removed as the upper surface panel (or lower surface panel) in the hot water storage unit housing. Attached to the opening. By doing so, the power generation means and the like can be shipped from the factory in a protected state covered with the power generation unit housing, and the hot water storage tank and the like are also partially covered with the hot water storage unit housing by the simple top panel and the simple bottom panel. It can be shipped to the factory in a protected state. Moreover, it becomes possible to use an inexpensive thing about a simple upper surface panel and a simple lower surface panel, and it can aim at reduction of the manufacturing cost of a hot water storage unit housing in connection with this.

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing which shows 1st Embodiment of the cogeneration system according to this invention simply. The figure which shows simply the piping connection part of the cogeneration system of FIG. 3A shows a state before construction of the power generation unit and the hot water storage unit in the cogeneration system of FIG. 1, and FIG. 3B shows a state after construction of the power generation unit and the hot water storage unit. Fig.4 (a) shows the state before construction of the power generation unit and hot water storage unit in 2nd Embodiment of the cogeneration system according to this invention, FIG.4 (b) shows after construction of these power generation units and hot water storage units. The figure which shows a state. The figure which shows the state after construction of the electric power generation unit and hot water storage unit in 3rd Embodiment of the cogeneration system according to this invention. The figure which shows the other example of installation of the electric power generation unit and hot water storage unit in the cogeneration system of FIG. Fig.7 (a) shows an example of the common connection piping used for the cogeneration system of FIG. 5, and FIG.7 (b) is a figure which shows the other example of this common connection piping. Sectional drawing which shows 4th Embodiment of the cogeneration system according to this invention simply. FIG. 9A shows a state before construction of the power generation unit and the hot water storage unit in the cogeneration system of FIG. 8, and FIG. 9B shows a state after construction of the power generation unit and the hot water storage unit. Fig. 10 (a) shows a state before construction of the power generation unit and the hot water storage unit in the fifth embodiment of the cogeneration system according to the present invention, and Fig. 10 (b) shows a state after construction of the power generation unit and the hot water storage unit. The figure which shows a state. Sectional drawing which shows an example of the conventional cogeneration system simply. The figure which shows simply the piping connection part of the electric power generation unit and hot water storage unit in the cogeneration system of FIG.

  Hereinafter, various embodiments of a cogeneration system according to the present invention will be described with reference to the accompanying drawings. In FIG. 1, the illustrated cogeneration system includes a power generation unit 2 and a hot water storage unit 4. The power generation unit 2 includes power generation means 6 that generates power using fuel gas (for example, city gas) as raw fuel. A power generation means 6 is disposed in the power generation unit housing 8. In this embodiment, the power generation means 6 is composed of a fuel cell 10 that generates power by a fuel cell reaction using fuel gas as raw fuel. For example, the power generation means 6 is composed of a combination of a gas engine and a generator driven by the gas engine. You may make it do.

  The hot water storage unit 4 has a hot water storage tank 12 for storing heat as hot water, and the hot water storage tank 12 is disposed in the hot water storage unit housing 14. In this embodiment, the power generation unit 2 and the hot water storage unit housing 4 are connected and connected as will be described later, and the power generation unit housing 8 and the hot water storage unit housing 14 constitute an integral system housing 16.

  Next, the power generation unit 2 will be described. The power generation unit 2 includes a reformer 18 for reforming raw fuel gas. The reformer 18 includes, for example, a reformer 20 and a carbon monoxide shifter. A container 22 is included. The reformer 20 converts the raw fuel gas, for example, by steam reforming to a reformed fuel gas with a reforming catalyst, and the carbon monoxide converter 22 converts the monoxide contained in the reformed fuel gas with a carbon monoxide converting catalyst. Carbon is converted into hydrogen and carbon dioxide, and the reformed fuel gas thus converted is supplied to the fuel electrode side of the fuel cell 10. Further, air is supplied to the oxygen electrode side of the fuel cell 10, and in the fuel cell 10, power generation is performed by a fuel cell reaction involving oxidation on the fuel electrode side and reduction on the oxygen electrode side, and the generated power of the fuel cell 10 Is converted into predetermined AC power by the inverter 24 and output.

  In this embodiment, a reformer heat exchanger 28 is disposed in association with the reformer 20, a transformer heat exchanger 26 is disposed in association with the carbon monoxide transformer 22, and the fuel cell 10 Relatedly, a heat exchanger 30 for cooling water is disposed. These heat exchangers 26, 28, 30 are the heat exchanger 26 for the transformer, the heat exchanger 28 for the reformer, and the heat exchanger 30 for the cooling water so that the high-temperature one is located above the power generation unit housing 8. Are arranged in this order from bottom to top.

  A combustion burner (not shown) for maintaining the reformer 20 at a predetermined reforming temperature is provided in association with the reformer 20, and the combustion exhaust gas from the combustion burner is used as heat for the reformer. It flows to the carbon monoxide transformer 20 downstream through the exchanger 28. This combustion exhaust gas maintains the carbon monoxide converter 20 at a predetermined carbon monoxide conversion temperature and is discharged to the outside through the heat exchanger 26 for the converter.

  Further, the fuel cell 10 is provided with a cooling water circulation passage 32 for circulating the cooling water, and the cooling water circulation passage 32 is provided through the fuel cell 10 and the cooling water heat exchanger 30. A cooling water pump 34 is disposed in the cooling water circulation passage 32, and the cooling water is circulated through the fuel cell 10 and the cooling water heat exchanger 30 by the action of the cooling water pump 34.

  Next, the hot water storage unit 4 will be described. In the illustrated hot water storage unit 4, an outflow portion 36 is provided at the bottom of the hot water storage tank 12, an inflow portion 38 is provided at the upper end thereof, and the outflow portion 36 and the outflow portion 38 communicate with each other via the hot water storage water circulation channel 40. The hot water flowing out from the outflow portion 36 of the hot water storage tank 12 flows through the hot water storage circulation path 40 and then flows into the upper end portion of the hot water storage tank 12 from the inflow portion 38.

  In this embodiment, the fuel cell 10 and related components (the reformer 18, the inverter 24, the heat exchanger 26 for the transformer, the heat exchanger 28 for the reformer, the heat exchanger 30 for the cooling water, etc.) are used as the power generation unit. The hot water storage tank 12 and the components related thereto (such as a hot water pump 44 disposed in the hot water circulation passage 40) are accommodated in the power generation unit space 42 in the housing 8, and the hot water storage unit space in the hot water storage unit housing 14 is provided. 46. In relation to this, the upstream side flow passage portion 48 of the hot water storage water circulation passage 40 extends from the hot water storage unit space 46 to the power generation unit space 42 at the lower portion in the system housing 16, and the intermediate flow passage portion 50 is The power generation unit space 42 is directed upward through the transformer heat exchanger 26, the reformer heat exchanger 28, and the cooling water heat exchanger 30, and the downstream flow path 52 is formed at the top of the unit housing 16. The hot water storage unit space 46 extends from the power generation unit space 42.

  In this cogeneration system, the hot water flowing out from the bottom of the hot water storage tank 12 through the outflow part 36 flows into the intermediate flow path part 50 through the upstream flow path part 48 and is heated while flowing through the intermediate flow path part 50. Hot water. That is, the hot water is heated by heat exchange with the combustion exhaust gas that has flowed through the carbon monoxide converter 20 while flowing through the heat exchanger 26 for transformer, and while flowing through the heat exchanger 28 for reformer. Heated by heat exchange with the combustion exhaust gas flowing through the reformer 20, and further heated by heat exchange with the cooling water flowing through the fuel cell 10 while flowing through the heat exchanger 30 for cooling water. . The hot-water storage water (warm water) heated in this way flows to the inflow portion 38 through the downstream-side channel portion 52 and is returned to the upper end portion of the hot-water storage tank 10 through the inflow portion 38 as hot water. Hot water is stored in layers from the upper end side of the tank 10 downward.

  In this embodiment, on the hot water storage unit 4 side, for example, a pipe connection portion 54 as shown in FIG. 2 is provided. Referring also to FIG. 2, the pipe connection portion 54 is provided with a gas connection portion 56, a water connection portion 58, and a tapping connection portion 60. A gas pipe 62 is connected to 56, fuel gas supplied through the gas pipe 62 is supplied to the reformer 18, and a tap water pipe 64 is connected to the water connection portion 58 and supplied through the tap water pipe 64. Tap water is supplied to the hot water storage tank 12, and a hot water piping 66 is connected to the hot water connecting portion 60, and hot water stored in the hot water storage tank 20 is discharged through the hot water piping 66. In this way, when the power generation unit housing 8 and the hot water storage unit housing 14 are connected and connected so as to be integrated, the number of various connection portions in the pipe connection portion 54 can be reduced.

  In such a cogeneration system, the power generation unit 2 is manufactured by the manufacturer of the power generation unit, and the hot water storage unit 4 is manufactured by the manufacturer of the hot water storage unit. The power generation unit 2 and the hot water storage unit are individually manufactured. 4 is connected and used as follows at the installation site. In this example, on the power generation unit 2 side, a specific side panel 68 (a panel on the right side in FIG. 3A) of the power generation unit housing 8 (which constitutes the power generation unit side specific panel) is detachably attached. The specific side panel 68 is attached so as to constitute a part of the power generation unit housing 8 when shipped from the factory, but is removed from the power generation unit 2 at the time of installation. Further, on the hot water storage unit 4 side, corresponding to the first specific side surface (left side surface in FIG. 3A) and the second specific side surface (right side surface in FIG. 3A), the first simplified side panel 70 and The second simple side panel 72 is detachably attached, and the first and second simple side panels 70 and 72 are attached so as to constitute a part of the hot water storage unit housing 14 at the time of factory shipment. The hot water storage unit 4 is removed.

  The specific side panel 68 and the other three side panels 74 and the top panel 76 constituting the power generation unit housing 8 are composed of a metal panel (for example, a surface-coated iron panel) having sufficient durability and strength. . In addition, the first and second simple side panels 70 and 72 constituting a part of the hot water storage unit housing 14 are for temporary use, and therefore are relatively inexpensive plywood panels or thin metal panels. (For example, a thin steel panel with a simple surface coating), and the other two side panels 78 and the upper panel 80 of the hot water storage unit housing 14 have sufficient durability and strength in the same manner as the power generation unit housing 8. It is comprised from the metal panel which has this.

  Such installation of the power generation unit 2 and the hot water storage unit 4 is performed, for example, as follows. First, the specific side panel 68 (power generation unit side specific panel) of the power generation unit housing 8 is removed, and the first and second simple side panels 70 and 72 of the hot water storage unit housing 14 are removed. When removed in this manner, one side surface (the side surface corresponding to the specific side panel 68) of the power generation unit housing 8 is opened, and two side surfaces (first and second simplified side panels 70, 72) of the hot water storage unit housing 14 are opened. The corresponding side) is opened. The first and second simple side panels 70 and 72 can be brought back to the manufacturing factory of the hot water storage unit 4 and reused as the first and second simple side panels of the hot water storage unit 4 to be newly manufactured.

  Then, the open side surface of the power generation unit housing 8 and the open side surface (side surface corresponding to the first simplified side panel 70) of the hot water storage unit housing 14 are opposed to each other, and in this state, the power generation unit 2 side Various flow passage portions (for example, gas flow passage portion, upstream flow passage portion 48 and downstream flow passage portion 52 of hot-water storage water circulation passage 40) and various flow passage portions (for example, gas flow passage portion) on the hot water storage unit 4 side. Then, the upstream channel portion 48 and the downstream channel portion 52) of the hot water circulating channel 40 are connected as required. At the time of this connection, you may make it remove and connect the other side panel of the electric power generation unit housing 8 and / or the hot water storage unit housing 14 as needed.

  Thereafter, the power generation unit housing 8 and the hot water storage unit housing 14 are brought into contact with each other in the state of being opposed to each other, and both are connected and connected in the lateral direction. For example, the support frame structure (not shown) of the power generation unit 8 and the support frame structure (not shown) of the hot water storage unit housing 14 are connected as required. When thus connected and connected, as shown in FIG. 3B, the power generation unit housing 8 and the hot water storage unit housing 14 are integrated to form the system housing 16, and the power generation unit space 42 in the power generation unit housing 8 The hot water storage unit space 14 of the hot water storage unit housing 14 communicates in the lateral direction through the open side opening. In addition, after connecting in this way, you may make it connect as mentioned above, after making both contact and connection-connecting instead of contacting both.

  Thereafter, the specific side panel 68 (power generation unit side specific panel) removed from the power generation unit housing 8 is attached to the side opening of the hot water storage unit housing 14 from which the second simplified side panel 72 is removed, and thus the power generation unit 2 and The hot water storage unit 4 can be installed as shown in FIG.

  In this embodiment, since the power generation unit housing 8 covers the upper surface and the four side surfaces of the power generation unit 2 from the time of shipment from the factory to the construction site, the fuel cell 10 and the like in the power generation unit 2 can be securely connected. Can be protected. Moreover, since the hot water storage unit housing 14 covers the upper surface and the four side surfaces of the hot water storage unit 4, the hot water storage tank 10 and the like in the hot water storage unit 4 can be protected. In addition, since the specific side panel 68 on the power generation unit 2 side that becomes unnecessary when both are connected and connected is attached to the side opening (side opening corresponding to the second simplified side panel 72) of the hot water storage unit housing 14, it is used. The relatively expensive specific side panel 68 can be used as a side panel (specific surface panel) of the hot water storage unit housing 14 without waste.

  In such a cogeneration system, the power generation unit and the hot water storage unit can be configured as shown in FIG. That is, the power generation unit 2 is configured in the same manner as described above, and the specific side panel 68 (the panel on the right side in FIG. 4A) of the power generation unit housing 8 (which constitutes the power generation unit side specific panel) can be removed. Attached to. On the other hand, with respect to the hot water storage unit 4A, the first and second simple side panels 70 and 72 described above are omitted, and the first specific side surface 84 of the hot water storage unit housing 14A (in the above-described form of FIG. The side surface to which the side panel 70 is attached and the second specific side surface 86 (the side surface to which the second simplified side panel 72 is attached in the above-described FIG. 3A) are shown in FIG. It is open to.

  Such installation of the power generation unit 2 and the hot water storage unit 4A is performed as follows, for example. First, the specific side panel 68 (power generation unit side specific panel) of the power generation unit housing 8 is removed and removed, so that one side surface (side surface corresponding to the specific side panel 68) of the power generation unit housing 8 is opened.

  Then, in the same manner as described above, with the opened one side surface of the power generation unit housing 8 and the side opening of the opened first specific side surface 84 of the hot water storage unit housing 14A opposed to each other, as described above. The various flow paths on the side and the various flow paths on the hot water storage unit 4A side are connected as required.

  Thereafter, the power generation unit housing 8 and the hot water storage unit housing 14A are brought into contact with each other in the state of being opposed to each other, and both are connected and connected in the lateral direction as described above. When thus connected and connected, as shown in FIG. 4B, the power generation unit housing 8 and the hot water storage unit housing 14A are integrated to form the system housing 16, and the power generation unit space 42 in the power generation unit housing 8 The hot water storage unit space 14 of the hot water storage unit housing 14 communicates with the open side surface opening.

  Thereafter, the specific side panel 68 removed from the power generation unit housing 8 is attached to the side opening of the second specific side surface 86 of the hot water storage unit housing 14A as a side panel of the hot water storage unit 4A, and thus the power generation unit 2 and the hot water storage unit. 4A can be installed as shown in FIG. In this case, since the two side surfaces of the hot water storage unit housing 14A are open at the time of shipment from the factory, the side panels that cover these side surfaces can be omitted, thereby further reducing the manufacturing cost.

  Next, with reference to FIG.5 and FIG.6, 3rd Embodiment of the cogeneration system according to this invention is described. In the first and second embodiments described above, the power generation unit 2 is installed on the left side and the hot water storage unit 4 (4A) is installed on the right side when viewed from the front during installation. In this third embodiment, the front side The hot water storage unit can be installed on either the right side or the left side of the power generation unit.

  5 and 6, the illustrated cogeneration system includes a power generation unit 2 </ b> B and a hot water storage unit 4 </ b> B. These basic configurations are substantially the same as those of the first and second embodiments, and are described below. In the embodiment, the same members as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The third embodiment is configured as follows in relation to the upstream flow path portion of the hot water circulation path 40B through which hot water circulates. On the power generation unit 2B side, a first pipe connection portion 202 is provided in the upstream flow path section, and on the hot water storage unit 4B side, a second pipe connection section 204 is provided in the upstream flow path section. . In the power generation unit 2B, the first pipe connection portion 202 is provided in the center in the lateral direction (left and right direction in FIGS. 5 and 6), and the axis line P1 passing through the first pipe connection portion 202 and one side of the power generation unit housing 8B. The distance between the end (the left end in FIGS. 5 and 6) and the distance between the axis P1 and the other end (the right end in FIGS. 5 and 6) are substantially the same. It is comprised so that it may become equal, and both are set to length D1. Also in the hot water storage unit 4B, as in the power generation unit 2B, the second pipe connection portion 204 is provided in the center in the lateral direction (left and right direction in FIGS. 5 and 6), and the axis passing through the second pipe connection portion 204 The distance between P2 and one side end (the left end in FIGS. 5 and 6) of the hot water storage unit housing 14B, and the axis P2 and the other side end (the right end in FIGS. 5 and 6) of the hot water storage unit housing 14B. Are configured to be substantially equal to each other, and both are set to the length D2. Further, the length D1 on the power generation unit 2B side and the length D2 on the hot water storage unit 4B side are substantially equal (D1 = D2).

  With this configuration, when the power generation unit 2B and the hot water storage unit 4B are installed as shown in FIG. 5 (that is, when the power generation unit 2B is installed on the left side and the hot water storage unit 4B is installed on the right side when viewed from the front), The distance between the first pipe connecting part 202 on the unit 2B side and the second pipe connecting part 204 on the hot water storage unit 4B side is the length (D1 + D2), and when these are installed as shown in FIG. When the hot water storage unit 4B is installed on the left side and the power generation unit 2B is installed on the right side when viewed from the front), the distance between the first pipe connection 202 on the power generation unit 2B side and the second pipe connection 204 on the hot water storage unit 4B side Also, the length is (D1 + D2), and the distance between the first pipe connection portion 202 and the second pipe connection portion 204 in these cases is practically equal.

  In such a case, the common connection pipe 206 can be used as a pipe member that connects the first pipe connection part 202 on the power generation unit 2B side and the second pipe connection part 204 on the hot water storage unit 4B side. The common connection pipe 206 shown in FIG. 7A is composed of a single pipe member having an elongated connection pipe main body 208, and first and second connections curved in a predetermined direction from the connection pipe main body 208 at both ends thereof. Units 210 and 212 are provided. When the power generation unit 2B and the hot water storage unit 4B are installed as shown in FIG. 5 (or FIG. 6), the first connection part 210 of the common connection pipe 206 is the first pipe connection part 202 (or the hot water storage unit 4B) on the power generation unit 2B side. Side second pipe connection part 204), and the second connection part 212 is connected to the second pipe connection part 204 on the hot water storage unit 4B side (or the first pipe connection part 202 on the power generation unit 2B side).

  As shown in FIG. 5 (or FIG. 6), the power generation unit 2B and the hot water storage unit 4B are disposed on the back side thereof, for example, in the vicinity of the wall 214 of a detached house. The pipe connection part 202 is preferably arranged on the front side (for example, the front side from the heat exchanger 26 for the transformer) in the power generation unit housing 8B, and the second pipe connection part 204 on the hot water storage tank 4B side It is preferable to dispose on the front side in the unit housing 14B (for example, the front side from the hot water storage tank 12). When configured in this way, when installed as shown in FIG. 5 (or FIG. 6), the first and second pipe connection portions 202, 204 are located on the front side of the power generation unit housing 8B and the hot water storage unit housing 14B, In a state where the power generation unit 2B and the hot water storage unit 4B are installed as required, the common connection pipe 206 is connected to the first pipe connection part 202 on the power generation unit 2B side and the second pipe connection part 204 of the hot water storage unit 4B from the front side thereof. The front panel 216 as one of the side panels of the power generation unit housing 8B and / or the front panel as one of the side panels of the hot water storage unit housing 14B can be connected as necessary. This can be done easily by removing 218.

  About this common connection piping, it can also comprise as shown in FIG.7 (b), for example. Referring to FIG. 7B, the common connection pipe 206A includes two pipe members connected to each other, that is, first and second pipe members 220 and 222. For example, a first connection part 210 similar to that described above is provided at one end of the first piping member 220, and a male screw part 224 is provided at the other end. Further, an internal thread portion (not shown) corresponding to the external thread portion 224 of the first piping member 220 is provided at one end portion of the second piping member 222, and a second connection similar to that described above is provided at the other end portion. A common connection pipe 206 </ b> A similar to that described above is configured by screwing the male screw part 224 of the first pipe member 220 and the female screw part of the second pipe member 222. When such a common connection pipe 206A is used, as described above, the first connection part 210 of the first pipe member 220 is connected to the first pipe connection part 202 on the power generation unit 2B side (or the second hot water storage unit 4B side). The second connection portion 212 of the second piping member 222 is connected to the second piping connection portion 204 (or the first piping connection portion 202 on the power generation unit 2B side) of the hot water storage unit 4B.

  In the embodiment described above, a part of the upstream channel portion of the hot water circulation channel 40B through which the hot water circulates is constituted by the common connection pipe 206 (206a), and the power generation unit in the upstream channel portion of the hot water circulation channel 40B. The 2B side and the hot water storage unit 4B side are communicated with each other via the common connection pipe 206 (206a). However, such a common connection pipe 206 (206a) is used instead of the upstream flow path section or the In addition to the upstream channel portion, the present invention can also be applied to the downstream channel portion of the hot water circulation channel 40B. In this case, although not shown, it is configured in substantially the same manner as described above, and on the power generation unit 2B side, the first pipe connection portion is provided in the downstream flow path portion of the hot water circulation circuit 40B, and the hot water storage unit 4B. On the side, a second pipe connection part is provided in the downstream flow path part. For example, the first connection part 210 of the common connection pipe 206 (206a) is connected to the first pipe connection part (or hot water storage unit) on the power generation unit 2B side. 4B side second pipe connecting part), and the second connecting part 212 is connected to the hot water storage unit 4B side second pipe connecting part (or the power generation unit 2B side first pipe connecting part).

  In the first to third embodiments described above, the power generation unit 2 (2B) and the hot water storage unit 4 (4A, 4B) are arranged side by side. However, as shown in FIGS. It can also be installed in the vertical direction.

  In the fourth embodiment of the cogeneration system shown in FIGS. 8 and 9, the power generation unit 2C is disposed on the lower side, and the hot water storage unit 4C is disposed on the upper side. For example, a support frame structure (8 A support frame structure (not shown) of the hot water storage unit housing 14C of the hot water storage unit 4C is placed and fixed on the upper side of the hot water storage unit 4C. The basic configuration of the power generation unit 2C and the hot water storage unit 4C is substantially the same as that of the first embodiment described above.

  In the cogeneration system of the fourth embodiment, on the power generation unit 2C side, an upper panel 232 of the power generation unit housing 8C (which constitutes the power generation unit side specific panel) is detachably attached. Although it is attached so as to constitute a part of the power generation unit housing 8C at the time of factory shipment, it is removed from the power generation unit 2C at the time of installation. Further, on the hot water storage unit 4C side, the simplified upper panel 234 and the simplified lower panel 236 are detachably attached corresponding to the upper surface and the lower surface, and the simplified upper panel 234 and the simplified lower panel 236 are stored in the hot water storage unit housing when shipped from the factory. Although it is attached so as to constitute a part of 14C, it is removed from hot water storage unit 4C at the time of installation.

  The upper panel 232, the four side panels 238, and the lower panel 240 constituting the power generation unit housing 8C are made of metal panels having sufficient durability and strength. Moreover, since the simple upper surface panel 234 and the simple lower surface panel 236 constituting a part of the hot water storage unit housing 14C are for temporary use, a relatively inexpensive plywood panel or a thin metal panel is used. The four side panels 242 of the hot water storage unit housing 14C are formed of metal panels having sufficient durability and strength, like the power generation unit housing 8C.

  Such installation of the power generation unit 2C and the hot water storage unit 4C is performed as follows, for example. First, the upper panel 232 (the power generation unit side specific panel) of the power generation unit housing 8C is removed, and the simplified upper panel 234 and the simplified lower panel 236 of the hot water storage unit housing 14C are removed. When removed in this way, the upper surface of the power generation unit housing 8C is opened, and the upper surface (upper surface corresponding to the simplified upper panel 234) and lower surface (lower surface corresponding to the simplified lower panel 236) of the hot water storage unit housing 14C are opened. . The simple top panel 234 and the simple bottom panel 236 can be reused as a simple top panel and a simple bottom panel of the hot water storage unit 4 to be newly manufactured by bringing them back to the manufacturing factory of the hot water storage unit 4C.

  And the open lower surface (for example, the support frame structure) of the hot water storage unit housing 14 is placed on the upper side of the opened upper surface (for example, the support frame structure) of the power generation unit housing 8C, and is thus placed. Then, both are fixed, and the hot water storage unit 4C is connected to the upper side of the power generation unit 2C. When thus connected and connected, as shown in FIG. 9B, the power generation unit housing 8C and the hot water storage unit housing 14C are integrated to form a system housing 16C, and the power generation unit space 42 in the power generation unit housing 8C The hot water storage unit space 46 of the hot water storage unit housing 14 </ b> C is communicated in the vertical direction through the opened opening.

  After connecting and connecting in this way, various flow paths on the power generation unit 2C side (for example, the upstream flow path section 48 and the downstream flow path section 52 of the hot-water storage water circulation path 40, the downstream side section of the hot water flow path 246, etc.) And various flow paths on the hot water storage unit 4C side (for example, the upstream flow path 48 and the downstream flow path 52 of the hot water circulating flow path 40, the upstream side of the hot water flow path 246, etc.) are connected as required. To do. At the time of this connection, you may make it remove and connect the side panel (for example, front side panel) of the electric power generation unit housing 8C and / or the hot water storage unit housing 14C as needed.

  Thereafter, the upper panel 232 (power generation unit side specific panel) removed from the power generation unit housing 8C is attached to the upper surface opening of the hot water storage unit housing 14C from which the simplified upper panel 234 has been removed, and thus the power generation unit 2 and the hot water storage unit 4 are attached. Can be installed as shown in FIG.

  In this embodiment, since the power generation unit housing 8C covers the entire surface of the power generation unit 2C from the time of shipment from the factory to the construction site, the fuel cell 10 and the like in the power generation unit 2C are reliably protected. Can do. Moreover, since the hot water storage unit housing 14C (including the simple upper surface panel 234 and the simple lower surface panel 236) covers the entire surface of the hot water storage unit 4, the hot water storage tank 10 and the like in the hot water storage unit 4C can be protected. In addition, since the upper surface panel 232 on the power generation unit 2C side which is not required when both are connected and connected in the vertical direction is attached to the upper surface opening of the hot water storage unit housing 14C (the upper surface opening corresponding to the simplified upper surface panel 234), it is used. The relatively expensive top panel 232 can be used without waste as the top panel (specific surface panel) of the hot water storage unit housing 14C.

  In the cogeneration system of the fourth embodiment, the hot water storage unit 4C is connected and connected to the upper side of the power generation unit 2C. On the contrary, as shown in FIG. 10, the power generation unit is connected to the upper side of the hot water storage unit. You may make it connect and connect.

  In FIG. 10, in the fifth embodiment of the cogeneration system, the power generation unit 2D is disposed above the hot water storage unit 4D. For example, above the support frame structure (not shown) of the hot water storage unit housing 14D of the hot water storage unit 4D. A support frame structure (not shown) of the power generation unit housing 8D of the power generation unit 2D is placed and fixed.

  In the cogeneration system of the fifth embodiment, on the power generation unit 2D side, the lower surface panel 240 of the power generation unit housing 8D (which constitutes the power generation unit side specific panel) is detachably attached. Although it is attached so as to constitute a part of the power generation unit housing 8D at the time of factory shipment, it is detached from the power generation unit 2D at the time of installation. Further, on the hot water storage unit 4D side, the above-described simplified upper surface panel and simplified lower surface panel are omitted, and the upper surface 252 and the lower surface 254 of the hot water storage unit housing 14D are opened as shown in FIG. In this case as well, as described above, the simple top panel and the simple bottom panel may be detachably attached.

  Such installation of the power generation unit 2D and the hot water storage unit 4D is performed, for example, as follows. First, the lower surface 240 of the power generation unit housing 8D (the power generation unit side specific panel) is removed, and thus the lower surface of the power generation unit housing 8 is opened.

  The lower panel 240 (power generation unit side specific panel) thus removed is attached to the opening of the opened lower surface 254 of the hot water storage unit housing 14D, and the lower panel 240 is used as the lower panel before the power generation unit 2D is attached. By attaching to the hot water storage unit housing 14D, it can be attached relatively easily.

  Thereafter, the hot water storage unit housing 14D is installed at a predetermined position, and the open lower surface (for example, the support frame structure) of the power generation unit housing 8D is placed on the upper surface of the open upper surface 252 (for example, the support frame structure). The power generation unit 2D is connected and connected to the upper side of the hot water storage unit 4D. When thus connected and connected, as shown in FIG. 10B, the hot water storage unit housing 14D and the power generation unit housing 8D are integrated to form a system housing 16D, and the hot water storage unit space 46 in the hot water storage unit housing 8D The power generation unit space 42 in the power generation unit housing 8 </ b> D communicates in the vertical direction through the open opening.

  After connecting and connecting in this way, the various flow passages on the power generation unit 2D side and the various flow passages on the hot water storage unit 4D side are connected as required, and thus the power generation unit 2D and the hot water storage unit 4D are connected as required. Can be installed in the street. In this case, since the upper surface 252 and the lower surface 254 of the hot water storage unit housing 14D are opened at the factory shipment stage, the upper panel and the lower panel covering the upper surface 252 and the lower surface 254 can be omitted. Costs can be further reduced.

  As mentioned above, although various embodiment of the cogeneration system according to this invention was described, this invention is not limited to this embodiment, A various change thru | or correction | amendment are possible without deviating from the scope of the present invention.

  For example, in the above-described embodiment, the hot water from the hot water storage tank 12 of the hot water storage unit 4 (4A to 4D) is directly discharged, but a backup heat source unit is associated with the hot water storage unit 4 (4A to 4D). (Not shown) may be provided so that hot water from the hot water storage tanks 4 (4A to 4D) is discharged through a backup heat source machine. In this case, a hot water going flow path (not shown) and a hot water return flow path (not shown) are provided between the hot water storage tank 12 and the backup heat source machine, and a hot water connection portion is provided on the backup heat source machine. .

  Further, for example, in the above-described embodiment, as the power generation unit 2 (2B to 2D), the transformer heat exchanger 26, the reformer heat exchanger 28, and the cooling water heat exchanger 30 are provided. The hot water circulation circuit 40 has been described as applied to a cogeneration system that flows through the heat exchangers 26, 28, and 30. However, another form of power generation unit (for example, between the reaction fuel gas discharged from the fuel cell) Heat exchange with heat exchanger, heat exchanger with heat exchange with combustion exhaust gas from combustion burner to keep reformer at reforming temperature, heat with air exhausted from fuel cell The present invention can be similarly applied to a cogeneration system including a heat exchanger that performs exchange and a heat exchanger that performs heat exchange with cooling water for cooling the fuel cell.

  In the above-described embodiment, the power generation unit 2 (2B to 2D) is manufactured by the power generation unit manufacturer, and the hot water storage unit 4 (4A to 4D) is manufactured by the hot water storage unit manufacturer. However, the present invention is also applicable to the case where the power generation unit 2 (2B to 2D) and the hot water storage unit 4 (4A to 4D) are manufactured in different factories of the same manufacturer, or to the same manufacturer of the same manufacturer. In these cases, the same effect can be achieved.

2, 2B, 2C, 2D, 102 Power generation unit 4, 4A, 4B, 4C, 4D, 108 Hot water storage unit 6 Power generation means 8, 8B, 8C, 8D, 106 Power generation unit housing 12, 110 Hot water storage tank 14, 14A, 14B, 14C, 14D, 112 Hot water storage unit housing 16, 16C, 16D System housing 42 Power generation unit space 46 Hot water storage unit space 68 Specific side panel 70 First simple side panel 72 Second simple side panel 84 First specific side 86 86 Second specific side 232 Top panel 234 Simplified top panel 236 Simplified bottom panel 240 Bottom panel

Claims (9)

A cogeneration system comprising a power generation unit for generating power and a hot water storage unit for recovering heat generated by the power generation unit as hot water,
The power generation unit includes a power generation unit that generates power, and a power generation unit housing that houses the power generation unit, and the hot water storage unit includes a hot water storage tank that stores hot water, and a hot water storage unit housing that stores the hot water storage tank. Have
During installation of the power generation unit and the hot water storage unit, the power generation unit side specific panel of the power generation unit housing is removed, and the power generation unit housing and the hot water storage unit housing are connected to each other, thereby generating power in the power generation unit housing. A cogeneration system characterized in that a unit space and a hot water storage unit space in the hot water storage unit housing communicate with each other, and the power generation unit side specific panel is attached as a specific surface panel of the hot water storage unit housing.   The power generation unit and the hot water storage unit are configured to be connected and connected in a lateral direction, the power generation unit side specific panel is a specific side panel in the power generation unit housing, and the power generation unit and the hot water storage unit are installed and installed. Sometimes, the specific side panel of the power generation unit housing is removed, and the power generation unit housing and the hot water storage unit housing are connected and connected in the lateral direction, whereby the power generation unit space in the power generation unit housing and the hot water storage unit housing are connected. The cogeneration system according to claim 1, wherein an inner hot water storage unit space is communicated in the lateral direction, and the specific side panel is attached as a side panel of the hot water storage unit housing. The first specific side surface and the second specific side surface of the hot water storage unit housing are open, and when the power generation unit and the hot water storage unit are installed, the side surface opening from which the specific side panel is removed and the opening of the first specific side surface The power generation unit housing and the hot water storage unit housing are connected to each other so that they communicate with each other, and the specific side panel removed from the power generation unit housing is used as the side panel of the hot water storage unit housing. The cogeneration system according to claim 2 , wherein the cogeneration system is attached to the cogeneration system. A first simple side panel and a second simple side panel are attached to the first specific side surface and the second specific side surface of the hot water storage unit housing, and the specific side panel is attached when the power generation unit and the hot water storage unit are installed. The power generation unit housing and the hot water storage unit housing are connected and connected so that the removed side opening communicates with the side opening from which the first simplified side panel is removed, and the specific side panel removed from the power generation unit housing the as the side panel of the hot water storage unit housing, cogeneration system according to claim 2, characterized in that attached to the side opening has been removed the second simplified side panel.   The power generation means of the power generation unit includes a fuel cell, and is disposed in a cooling water circulation channel and a cooling water circulation channel in which cooling water for cooling the fuel cell is circulated in association with the fuel cell. A cooling water exchanger is provided, and the fuel cell, the cooling water circulation passage, and the cooling water heat exchanger are disposed in the power generation unit housing, and in relation to the hot water storage tank, There is provided a hot water circulation path through which the hot water is circulated, and the hot water circulation path extends from the bottom of the hot water storage tank through the hot water storage unit space to the power generation unit space and upwards in the power generation unit space. It extends through the cooling water heat exchanger, and is further connected to the upper end of the hot water storage tank from the upper part of the power generation unit space through the upper part of the hot water storage unit space. Cogeneration system according to claim 2. The hot water circulating flow path through which the hot water in the hot water storage tank is circulated includes an upstream flow path portion extending from the hot water storage unit housing into the power generation unit housing, and an intermediate flow path extending upward in the power generation unit housing. And a downstream channel portion extending from the power generation unit housing into the hot water storage unit housing, the upstream channel portion of the hot water circulation channel and / or a part of the downstream channel portion is 6. It is comprised from the common connection piping used when the hot water storage unit is connected and connected to one side of the power generation unit and when the hot water storage unit is connected and connected to the other side of the power generation unit. Cogeneration system.
  The power generation unit and the hot water storage unit are configured to be connected and connected in the vertical direction, and the power generation unit side specific panel is an upper panel or a lower panel in the power generation unit housing, and the power generation unit and the hot water storage unit At the time of installation, the hot water storage unit housing is connected in the vertical direction to the upper side or the lower side of the power generation unit housing by removing the upper panel or the lower panel of the power generation unit housing. The power generation unit space and the hot water storage unit space in the hot water storage unit housing communicate with each other in the vertical direction, and the upper panel or the lower panel is attached as an upper panel or a lower panel of the hot water storage unit housing. Claim Cogeneration system according to 1.   The lower surface and the upper surface of the hot water storage unit housing are open, and the upper surface opening or the lower surface opening and the hot water storage unit from which the upper surface panel or the lower surface panel of the power generation unit housing is removed when the power generation unit and the hot water storage unit are installed. The power generation unit housing and the hot water storage unit housing are connected and connected so that the lower surface of the housing or the opening of the upper surface communicates, and the upper panel or the lower panel removed from the power generation unit housing is the hot water storage unit housing. The cogeneration system according to claim 7, wherein the cogeneration system is attached to the opening of the upper surface or the lower surface of the hot water storage unit housing as the upper surface panel or the lower surface panel. A simple top panel and a simple bottom panel are attached to the top and bottom surfaces of the hot water storage unit housing, and the top panel or the bottom panel of the power generation unit housing is removed when the power generation unit and the hot water storage unit are installed. The power generation unit housing and the hot water storage unit housing are connected and connected so that the upper surface opening or the lower surface opening communicates with the lower surface opening from which the simplified lower surface panel is removed or the upper surface opening from which the simplified upper surface panel is removed. The upper surface panel or the lower surface panel removed from the housing is used as the upper surface panel or the lower surface panel of the hot water storage unit housing, the upper surface opening from which the simplified upper surface panel is removed or the lower surface opening from which the simplified lower surface panel is removed. Attached to Cogeneration system according to claim 7, characterized in Rukoto.

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