JP2006274748A - Wall member, building, and hot water storage system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storage space inside a wall while assuring the strength of the wall of a building. <P>SOLUTION: A wall member constituting a wall of a building has the hot water storage space inside to store the hot water. The storage space comprises a first side face substantially parallel to a wall surface of the wall member and a second side face facing the first side face. The first side face and the second side face are connected to each other, and a connecting member is provided to partition the storage space into a plurality of sectioned spaces. The connecting member provided substantially horizontally has a communicating port for communicating a lower part of the sectioned space positioned above the connecting member with the upper part of the sectioned space positioned below the connecting member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wall member, a building, and a hot water storage system. In particular, the present invention relates to a wall member, a building, and a hot water storage system for storing hot water.

In a conventional fuel cell power generation system, a reformer, a fuel cell, a control system, an auxiliary machine, a power converter, and the like are housed in one exterior case, and the case is installed outdoors in each home ( For example, see Patent Document 1.) In addition, hot water is generated from city water using heat generated in the process of power generation by the fuel cell, and the hot water is stored in a hot water storage tank installed outdoors.
JP 2003-199254 A

  For example, in an apartment house, the outdoor space where the fuel cell system can be installed is limited to a veranda or the like. For this reason, a part of outdoor space, such as a valuable veranda of an apartment house, will be occupied by the hot water storage tank. In this case, it is desirable that residents can freely use the outdoor space of the apartment house by installing a hot water storage tank inside the structure such as the wall of the apartment house. Also, in detached houses, hot water storage tanks can be used to store hot water in hot water storage tanks in a house compared to the case where they are installed in a garden or other place away from the house by installing hot water storage tanks inside the housing structure. The length of the piping leading to can be shortened. Thereby, the amount of heat loss to the outside can be reduced. However, for example, if a hot water storage tank is installed inside the wall of a house, the strength of the wall decreases. If the wall thickness is increased to ensure the strength of the wall, the living space is compressed.

  Then, an object of this invention is to provide the building which can solve said subject. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.

  According to the first aspect of the present invention, the wall member is a wall of a building, and has a hot water storage space for storing hot water therein, and the hot water storage space has a first side surface substantially parallel to the wall surface of the wall member. And a second side surface opposed to the first side surface, the first side surface and the second side surface are coupled, and a hot water storage space is divided into a plurality of partial spaces.

  The connecting member has a communication port that communicates the lower part of the partial space located above the connecting member and the upper part of the partial space located below the connecting member.

  The first side surface and the second side surface may be rectangular, and the connecting member may be provided in a direction connecting the diagonals of the first side surface or the second side surface in the hot water storage space.

  According to the 2nd form of this invention, it is a building provided with the wall which contains the hot water storage space which stores hot water inside, Comprising: A hot water storage space is on the 1st side surface substantially parallel to the wall surface of a wall, and a 1st side surface The wall has a connecting member that connects the first side face and the second side face and divides the hot water storage space into a plurality of partial spaces.

  A hot water storage system according to a third aspect of the present invention is provided inside a building wall to store hot water, and has a first side surface substantially parallel to the wall surface of the wall and a second side surface facing the first side surface. And a connecting member that connects the first side surface and the second side surface and divides the hot water storage space into a plurality of partial spaces.

  The connecting member is provided substantially horizontally, and the partial space located above the connecting member stores hot water having a temperature higher than that of the partial space located below the connecting member.

  Of the plurality of partial spaces, warm water stored in one partial space is heated using a heat amount from a heat source before a partial space located below the one partial space, and the one portion The apparatus further includes a control unit that heats the partial space positioned below the one partial space after warming the hot water stored in the space. The plurality of partial spaces store hot water heated using exhaust heat discharged by the fuel cell.

  Note that the above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  ADVANTAGE OF THE INVENTION According to this invention, hot water storage space can be provided in the inside of a wall, ensuring the intensity | strength of the wall of a building.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the claimed invention, and all combinations of features described in the embodiments are inventions. It is not always essential to the solution.

  FIG. 1 shows a building 110 according to an embodiment of the present invention. The building 110 of this embodiment includes a fuel cell storage chamber 74, an exhaust part 52, a fuel cell 40, a hot water storage space 48, and a connecting member 66.

  The fuel cell storage chamber 74 is provided to store the fuel cell 40 therein. Specifically, the fuel cell storage chamber 74 is provided inside the terrace 68 of the building 110. The fuel cell 40 is installed inside the fuel cell storage chamber 74. Here, the terrace 68 may be a structure including a balcony and a veranda.

  The fuel cell 40 consumes hydrogen to generate power. Specifically, the fuel cell 40 may be a polymer electrolyte fuel cell (PEFC). The fuel cell 40 may generate electricity using hydrogen gas supplied from a reformer that generates hydrogen gas by reforming city gas, propane gas, or the like, and uses hydrogen gas supplied from the outside as fuel. You may generate electricity. Then, the fuel cell 40 exhausts the gas containing hydrogen discharged without being used for power generation at the anode or the combustion gas generated by burning the gas in the reformer as exhaust gas from the exhaust port 54. . The fuel cell 40 may be a fuel cell including a reformer, or may be a fuel cell not including a reformer.

  The exhaust unit 52 is provided at a position facing the exhaust port 54 for exhausting the exhaust gas from the fuel cell 40 so as to exhaust the exhaust gas from the fuel cell 40 directly to the outside of the building 110, and is connected to the exhaust port 54. . In the example of FIG. 1, the exhaust part 52 is provided on the wall surface of the waist wall 72 of the terrace 68.

  For this reason, the exhaust gas of the fuel cell 40 can be appropriately exhausted from the building 110 to the outside. Therefore, the exhaust gas of the fuel cell 40 can be prevented from entering the living space. Note that an air supply unit 53 that takes in air from the outside of the building 110 and supplies the air to the fuel cell 40 is provided below the exhaust unit 52. By providing the air supply unit 53 below the exhaust unit 52, the amount of exhaust gas from the exhaust unit 52 taken into the fuel cell 40 can be reduced.

  In addition, in each of the exhaust part 52 and the air supply part 53, the weather cover 51 which prevents water, such as rain water, permeating from the outside is extended outward from the opening part to the exterior of the building 110. . Further, the exhaust part 52 has a structure in which dew generated on the wall surface of the exhaust path of the exhaust part 52 due to water vapor or the like contained in the exhaust gas of the fuel cell 40 is discharged to the outside of the building 110. For example, the bottom of the exhaust part 52 is inclined downwardly from the exhaust port 54 toward the outside of the building 110. In addition, the entire exhaust path of the exhaust unit 52 may be inclined downward toward the outside of the building 110. The wall surface of the exhaust path in the exhaust part 52 has a shape in which dew collects at the bottom of the exhaust part 52, for example, a cylindrical shape. Further, a backflow prevention plate 55 that prevents the inflow of water from the exhaust port 54 to the fuel cell 40 is provided at a connection portion between the exhaust unit 52 and the exhaust port 54. For this reason, water such as rainwater enters the fuel cell 40 from the outside through the exhaust part 52 or the air supply part 53, or the dew adhering to the inner wall of the exhaust part 52 enters the fuel cell 40. The probability that the battery 40 will fail can be reduced.

  Further, the fuel cell 40 generates heat from the power generation cell along with power generation. When the fuel cell 40 has a reformer, the fuel cell 40 discharges heat that was not used in the reformer. The hot water storage space 48 is provided inside the wall of the building 110 in order to store hot water heated by the exhaust heat of the fuel cell 40. Specifically, the exhaust heat pipe 86 is connected to the fuel cell 40 and the hot water storage space 48 and allows hot water in the hot water storage space 48 to flow as cooling water for cooling the fuel cell 40. The hot water in the exhaust heat pipe 86 is circulated between the hot water storage space 48 and the fuel cell 40 by the exhaust heat pump 99.

  According to the building 110 described above, since the hot water storage space 48 for storing hot water heated by the exhaust heat of the fuel cell 40 and the fuel cell 40 are housed inside, the fuel cell 40 and the hot water storage space 48 are used for residents' activities. It can be installed in an unobstructed position.

  The fuel cell storage chamber 74 is provided at a position where the fuel cell 40 can be installed further below the lower surface of the hot water stored in the hot water storage space 48. Specifically, the fuel cell storage chamber 74 is provided below the floor surface 73 of the terrace 68 of the building 110. For this reason, even when the exhaust heat pump 99 that supplies heat to the hot water storage space 48 stops operating, the fuel cell 40 can be cooled by the water below the hot water storage space 48.

  And the hot water storage space 48 has the 1st side surface 62a substantially parallel to the wall surface of a wall, and the 2nd side surface 62b facing the 1st side surface 62a. The connecting member 66 connects the first side face 62a and the second side face 62b, and divides the hot water storage space 48 into a plurality of partial spaces (46a and 46b). For this reason, the hot water storage space 48 can be provided inside the waist wall 72 while maintaining the strength of the waist wall 72 by the connecting member 66. A plurality of connecting members 66 may be provided in the hot water storage space 48. The connecting member 66 has a communication port 42 that communicates the lower part of the partial space 46 a located above the connecting member 66 and the upper part of the partial space 46 b located below the connecting member 66.

  When hot water is stored in the hot water storage space 48, the hot water stored is divided into a high temperature portion and a low temperature portion, and a temperature boundary layer is generated due to the difference in specific gravity between the two. The thickness of this temperature boundary layer is substantially the same regardless of whether the hot water storage space 48 is horizontally long or vertically long. Therefore, when the hot water storage space is horizontally long, the volume of the temperature boundary layer increases as the horizontal sectional area increases. And since the temperature fall of a high temperature part also becomes large by the heat transfer from a high temperature part to a low temperature part through this temperature boundary layer, heat storage efficiency will fall. However, in the hot water storage space 48 in the building 110 of the present embodiment, the connecting member 66 can form a longer space by having the communication port 42. For this reason, the heat storage efficiency can be further increased while ensuring the strength of the waist wall 72.

  Specifically, the connecting member 66 is provided substantially horizontally. The partial space 46 a located above the connecting member 66 stores hot water having a temperature higher than that of the partial space 46 b located below the connecting member 66. Specifically, among the plurality of partial spaces 46, warm water stored in the partial space 46a is heated using the amount of heat from the heat source prior to the partial space 46 positioned below the partial space 46a. After warming the hot water stored in the partial space 46a, the partial space 46b located below the partial space 46a is heated. For example, hot water in the lower part of the partial space 46 b is supplied to the fuel cell 40 as cooling water for cooling the fuel cell 40. And the warm water obtained by heating in the fuel cell 40 is supplied from the upper part of the partial space 46a.

  The hot water storage space 48 is preferably insulated from the outside of the hot water storage space 48. For example, the hot water storage space 48 may be formed by a building member that insulates the hot water storage space 48 and the outside of the hot water storage space 48. In addition, a heat insulating material that insulates the hot water storage space 48 and the outside of the hot water storage space 48 may be provided around the hot water storage space 48.

  As described above, the fuel cell 40 can be housed in the building 110, and hot water generated using the exhaust heat of the fuel cell 40 can be efficiently stored in the building 110. The fuel cell storage chamber 74 may be a space below the floor of the building 110, a ceiling, a space below a staircase, or the like.

  FIG. 2 shows an example of a wall member 64 that becomes a wall of a building. The wall member 64 may be a member used for construction of the building 110 such as the waist wall 72 described in FIG. The wall member 64 includes a hot water storage space 48, a connecting member 66, and a heat insulating material 60. The hot water storage space 48 is provided inside the wall member 64 and stores hot water. A heat insulating material 60 is provided around the hot water storage space 48.

  The hot water storage space 48 includes a first side surface 62a that is substantially parallel to the wall surface of the wall member 64, and a second side surface 62b that faces the first side surface 62a. The connecting member 66 connects the first side face 62a and the second side face 62b, and divides the hot water storage space 48 into a plurality of partial spaces (46a and 46b).

  The connecting member 66 is provided substantially horizontally. In addition, the connecting member 66 has a communication port 42 that communicates the lower part of the partial space 46 a located above the connecting member 66 and the upper part of the partial space 46 b located below the connecting member 66. In the present embodiment, the connecting member 66 has the communication port 42, so that a vertically long hot water storage space 48 can be formed as compared to the case where the communication port 42 is not provided. For this reason, the heat storage efficiency can be further enhanced while ensuring the strength of the waist wall 72.

  The heat insulating material 60 can function as a member that insulates the building 110 and also functions as a member that insulates the hot water storage space 48. Moreover, by using the wall member 64 in which water is stored as the wall of the building 110, the fire resistance of the building 110 can be further improved.

  FIG. 3 shows a modification of the wall member 64. The wall member 64 in this modification includes a hot water storage space 48, a connecting member 66, and a heat insulating material 60. The hot water storage space 48 includes a first side surface 62a that is substantially parallel to the wall surface of the wall member 64, and a second side surface 62b that faces the first side surface 62a. In addition, since the heat insulating material 60 in this modification has the same function as the heat insulating material 60 demonstrated in FIG. 2, description is abbreviate | omitted.

  In the wall member 64 of this modification, the first side surface 62a and the second side surface 62b are rectangular. The connecting member 66 is provided in the hot water storage space 48 in a direction connecting the diagonal corners of the first side surface 62a or the second side surface 62b. The hot water storage space 48 is divided into a plurality of partial spaces (46a and 46b) by the connecting member 66. And the connection member 66 has the communicating port 42 which connects the partial space 46a and the partial space 46b. The connecting member 66 may be a brace that reinforces the building in which the wall member 64 of the present modification is a wall.

  According to the wall member 64 of this modification, the first side surface 62a and the second side surface 62b can be more firmly connected. Therefore, the strength of the wall member 64 can be further increased. Further, the connecting member 66 in the wall member 64 of the present modification can have a function as a brace that reinforces the building in which the wall member 64 becomes a wall.

  FIG. 4 shows a further modification of the wall member 64. The wall member 64 in this modification includes a hot water storage space 48, a connecting member 66, and a heat insulating material 60. The hot water storage space 48 and the heat insulating material 60 have the same functions as the hot water storage space 48 and the heat insulating material 60 described in FIG. In the wall member 64 of the present modification, the connecting member 66 is integrally formed as the wall member 64, connects the first side surface 62a and the second side surface 62b, and connects the hot water storage space 48 to a plurality of hot water storage spaces 48. Divide into subspaces (46a and 46b).

  FIG. 5 shows an example of the configuration of the hot water storage system 100. The hot water storage system 100 of the present embodiment includes a first hot water storage section 44a, a second hot water storage section 44b, a connection pipe 43, a first heat insulating material 60a, a second heat insulating material 60b, a hot water heating section 58, and a warming pipe. (56a to c), hot water storage pump 90, exhaust heat pipe 88, exhaust heat pump 98, valve 92, valve 94, hot water supply pipe 82, fuel cell 40, and control unit 50 are provided. The fuel cell 40 operates in the same manner as the fuel cell 40 described in FIG. The hot water storage system 100 of the present embodiment functions as, for example, a hot water storage system that stores hot water in the building 110 described with reference to FIG. 1 or a hot water storage system that stores hot water in the wall member 64 described with reference to FIGS. Also good.

  The 1st hot water storage part 44a and the 2nd hot water storage part 44b store hot water heated by receiving the calorie | heat amount from a heat source. Specifically, the first hot water storage section 44 a and the second hot water storage section 44 b store hot water heated by exhaust heat exhausted by the fuel cell 40. The first heat insulating material 60a is provided around the first hot water storage section 44a. The second heat insulating material 60b is provided around the second hot water storage section 44b.

  The 2nd hot water storage part 44b has heat insulation lower than the 1st hot water storage part 44a. The heat insulation here refers to the value of the heat flow resistance from the first hot water storage portion 44a and the second hot water storage portion 44b to the space outside the first heat insulating material 60a and the second heat insulating material 60b, respectively. It may be.

  Specifically, the second heat insulating material 60b has a heat insulating property lower than that of the first heat insulating material 60a. For example, the thickness of the second heat insulating material 60b may be thinner than the thickness of the first heat insulating material 60a. Further, the second heat insulating material 60b may include a member having a lower heat flow resistance than the first heat insulating material 60a. In addition, the 1st hot water storage part 44a has a heat insulating material outside, and the 2nd hot water storage part 44b does not need to contain a heat insulating material outside. For example, the second heat insulating material 60b may not be provided around the second hot water storage portion 44b, and at least a part of the second heat insulating material 60b around the second hot water storage portion 44b is provided with a heat insulating material. There may be a partial region that is not provided. In addition, the ratio of the surface area to the volume of hot water stored in the second hot water storage section 44b may be larger than the ratio of the surface area to the volume of hot water stored in the first hot water storage section 44a. .

  In addition, the 1st hot water storage part 44a stores hot water hotter than the hot water stored in the 2nd hot water storage part 44b. Specifically, the first hot water storage part 44a is provided above the second hot water storage part 44b, and the lower part of the first hot water storage part 44a and the upper part of the second hot water storage part 44b are connected by a connection pipe 43. It is connected. And the 1st hot water storage part 44a stores the hot water heated by receiving heat quantity preferentially rather than the 2nd hot water storage part 44b.

  Specifically, the hot water heating unit 58 performs heat exchange between the heat medium that has received the exhaust heat of the fuel cell 40 and the hot water stored in the first hot water storage unit 44a and / or the second hot water storage unit 44b. The hot water stored in the first hot water storage section 44a and / or the second hot water storage section 44b is heated. Then, the hot water warming unit 58 warms the hot water stored in the first hot water storage unit 44a before the second hot water storage unit 44b, and warms the hot water stored in the first hot water storage unit 44a. Later, the hot water stored in the second hot water storage section 44b is heated.

  Specifically, the cooling water that receives and cools the exhaust heat from the fuel cell 40 is circulated through the exhaust heat pipe 88 by the exhaust heat pump 98. The warm water warming section 58 is connected to a warming pipe 56a for taking out hot water from the lower part of the second hot water storage section 44b and an exhaust heat pipe 88. The warm water in the warming pipe 56a is supplied to the warm water warming part 58 by the hot water storage pump 90, and the warm water warming part 58 receives the amount of heat of the cooling water flowing through the exhaust heat pipe 88 and warms it. It is supplied to the hot water storage section 44a.

  Moreover, the control part 50 takes out the warm water stored in the 2nd hot water storage part 44b to the heating piping 56a on condition that the hot water cannot be further stored in the 1st hot water storage part 44a, and the hot water warming part 58 Let warm. For example, when the hot water can be further stored in the first hot water storage unit 44a, the control unit 50 causes the heating pipe 56b to communicate with the warming pipe 56a by using the valve 94, whereby the first hot water storage unit 44a. The lower warm water is taken out from the warming pipe 56 b and led to the warm water warming section 58. And the warm water heated in the warm water warming part 58 is supplied from the upper part of the 1st hot water storage part 44a.

  At this time, the control unit 50 sequentially measures the temperature of the hot water in the lower part of the first hot water storage unit 44a, and on the condition that the temperature of the hot water is equal to or higher than a predetermined temperature, the second hot water storage unit 44b. The warm water is warmed by the warm water warming section 58. Specifically, the hot water taken out from the lower part of the second hot water storage unit 44b to the heating pipe 56a is guided to the hot water heating unit 58 to be heated. And the warm water heated in the warm water heating part 58 is supplied to the 1st hot water storage part 44a from the upper part of the 1st hot water storage part 44a. The control unit 50 controls the valve 92 so as to communicate with the heating pipe 56c connected to the upper part of the second hot water storage unit 44b, and the hot water heated by the hot water heating unit 58 is supplied to the second hot water storage unit 58. You may supply to the upper part of the hot water storage part 44b.

  In addition, the 1st hot water storage part 44a and the 2nd hot water storage part 44b may be independent hot water storage tanks. For example, in the case where hot water storage tanks are provided on a plurality of floors of an apartment house, the hot water storage tank provided on the first floor functions as the first hot water storage section 44a of the hot water storage system 100, and is located below the hot water storage tank. The hot water storage tank provided on the floor may function as the second hot water storage section 44 b of the hot water storage system 100.

  The hot water stored in the first hot water storage section 44a is supplied to the hot water supply demand through the hot water supply pipe 82. When hot water is consumed due to demand for hot water supply, the consumed amount of city water is supplied from the lower part of the second hot water storage section 44b.

  According to the hot water storage system 100 of the present embodiment, for example, when the first hot water storage section 44a is filled with warm water of a specified temperature, even when the exhaust heat of the fuel cell 40 cannot be provided to the first hot water storage section 44a, The exhaust heat of the fuel cell 40 can be provided to the second hot water storage section 44b. Therefore, even when the cooling water flowing through the exhaust heat pipe 88 is not sufficiently cooled by the hot water in the first hot water storage section 44a, the cooling water can be cooled by the hot water in the second hot water storage section 44b. Therefore, the frequency with which the operation of the fuel cell 40 is stopped due to insufficient cooling of the fuel cell 40 can be reduced.

  FIG. 6 shows a modification of the hot water storage system 100. The hot water storage system 100 of the present modification includes a first hot water storage section 44a, a second hot water storage section 44b, a connection pipe 43, a first heat insulating material 60a, a second heat insulating material 60b, a hot water heating section 58, and a warming pipe. (57a and 57b), a hot water storage pump (91a and 91b), an exhaust heat pipe 88, an exhaust heat pump 98, a hot water supply pipe 82, the fuel cell 40, and the control unit 50. The heating pipe 57a connects the lower part of the first hot water storage part 44a and the upper part of the first hot water storage part 44a. The heating pipe 57b connects the lower part of the second hot water storage part 44b and the upper part of the second hot water storage part 44b. Note that, among the components of the hot water storage system 100 according to the present modification, components having the same reference numerals as those of the hot water storage system 100 in FIG. 5 have the same functions as the components having the same reference numerals. The description is omitted.

  The warming pipe 57a is connected to the warm water warming part 58, and the warm water taken out from the lower part of the first hot water storage part 44a is heated by passing through the warm water warming part 58 by the hot water storage pump 91a. It supplies from the upper part of the 1st hot water storage part 44a. The warming pipe 57b is connected to the warm water warming part 58, and warm water taken from the lower part of the second hot water storage part 44b is passed through the warm water warming part 58 by the hot water storage pump 91b and heated. , Supplied from the upper part of the second hot water storage section 44b. At this time, the warm water warming unit 58 provides the amount of heat of the cooling water flowing through the exhaust heat pipe 88 to the warm water in the warm pipe 57a before the warm water in the warm pipe 57b.

  According to the hot water storage system 100 of the present modified example, when the exhaust heat of the fuel cell 40 cannot be provided to the first hot water storage section 44a, for example, when the first hot water storage section 44a is filled with hot water, the fuel cell The exhaust heat of 40 is automatically provided to the second hot water storage section 44b. Even when the cooling water flowing through the exhaust heat pipe 88 is not sufficiently cooled by the hot water at the lower part of the first hot water storage part 44a in the hot water heating part 58, the cooling water is cooled by the hot water at the lower part of the second hot water storage part 44b. can do. Therefore, the frequency with which the fuel cell 40 stops operation due to insufficient cooling of the fuel cell 40 can be reduced.

  FIG. 7 shows a further modification of the hot water storage system 100. The hot water storage system 100 includes a first hot water storage section 44a, a second hot water storage section 44b, a connection pipe 43, a first heat insulating material 60a, a second heat insulating material 60b, a hot water heating section (58a and 58b), and an exhaust heat pipe. 88, a waste heat pump 98, and a hot water supply pipe 82. Note that, among the components of the hot water storage system 100 of the present modification, the components denoted by the same reference numerals in the hot water storage system 100 of FIG. 5 have the same functions as the components denoted by the same reference numerals. Therefore, explanation is omitted.

  The hot water warming part 58a is provided in the lower part of the 1st hot water storage part 44a in order to heat the hot water stored in the 1st hot water storage part 44a. The hot water warming part 58b is provided below the second hot water storage part 44b in order to warm the hot water stored in the second hot water storage part 44b. And the exhaust heat piping 88 has connected the warm water warming part 58a and the warm water warming part 58b in series. Inside the exhaust heat pipe 88, the heat medium heated by the exhaust heat of the fuel cell 40 is circulated by the exhaust heat pump 98. The exhaust heat pipe 88 guides the heat medium heated by the exhaust heat of the fuel cell 40 to the hot water heating section 58a provided in the first hot water storage section 44a, and is stored in the first hot water storage section 44a. After the warm water is heated, the hot water stored in the second hot water storage section 44b is heated by being guided to the hot water warming section 58b provided in the second hot water storage section 44b.

  According to the hot water storage system 100 of the present modified example, when the exhaust heat of the fuel cell 40 cannot be provided to the first hot water storage section 44a, for example, when the first hot water storage section 44a is filled with hot water, the fuel cell The exhaust heat of 40 is automatically provided to the second hot water storage section 44b. Further, even when the cooling water flowing through the exhaust heat pipe 88 is not sufficiently cooled by the hot water in the lower part of the first hot water storage part 44a, the cooling water can be cooled by the hot water in the lower part of the second hot water storage part 44b. Therefore, the frequency with which the fuel cell 40 stops operation due to insufficient cooling of the fuel cell 40 can be reduced.

  The hot water storage system 100 described with reference to FIGS. 5 to 7 is a hot water storage system that stores hot water in the building 110 described with reference to FIG. 1 or a hot water storage system that stores hot water with the wall member 64 described with reference to FIGS. May function. For example, the first hot water storage section 44a, the second hot water storage section 44b, and the connection pipe 43 in the hot water storage system 100 described with reference to FIGS. 5 to 6 are respectively connected to the building 110 or the wall member 64 described with reference to FIGS. The partial space 46a, the partial space 46b, and the communication port 42 may function. In addition, the first heat insulating material 60a and the second heat insulating material 60b in the hot water storage system 100 may function as the heat insulating material 60 in the wall member 64 described with reference to FIGS.

  FIG. 8 shows another example of the arrangement of the fuel cell storage chamber 74 in the building 110. The building 110 in this example is the same as the building 110 described in FIG. 1 except for the positions of the fuel cell storage chamber 74, the fuel cell 40, and the exhaust part 52. The fuel cell storage chamber 74 is provided on the wall surface of the terrace 68 of the building 110, and the fuel cell 40 is installed in the fuel cell storage chamber 74. And the exhaust part 52 provided in the wall surface of the terrace 68 is provided in the position which opposes the exhaust port 54 which exhausts the exhaust gas from the fuel cell 40, in order to exhaust the exhaust gas from the fuel cell 40 directly to the exterior of the building 110. And connected to the exhaust port 54. In addition to the wall surface of the terrace 68, the fuel cell storage chamber 74 may be provided on the wall surface of the foundation of the building. The fuel cell storage chamber 74 may be an underfloor space surrounded by the foundation of the building 110, for example.

  FIG. 9 shows a modification of the building 110. The building 110 in this modification is a ridge 70 in which a fuel cell storage chamber 74 is provided. Among the components of the fence 70 in this modification, the components denoted by the same reference numerals in the building 110 of FIG. 1 have the same functions as the components denoted by the same reference numerals in the building 110 of FIG. The description is omitted. In addition, the building 110 may be a wall of a building. Moreover, the wall member 64 may be a member used for a structure of a building such as a wall of the building or a fence 70.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the above embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

It is a figure which shows an example of the building 110. FIG. It is a figure which shows an example of the wall member. It is a figure which shows the modification of the wall member. It is a figure which shows the further modification of the wall member. It is a figure which shows an example of a structure of the hot water storage system. It is a figure which shows the modification of the hot water storage system. It is a figure which shows the further modification of the hot water storage system. FIG. 6 is a view showing another example of the arrangement of the fuel cell storage chamber 74. It is a figure which shows the modification of the building.

Explanation of symbols

40 Fuel Cell 42 Communication Port 43 Connection Pipe 44a First Hot Water Storage Unit 44b Second Hot Water Storage Unit 46 Partial Space 48 Hot Water Storage Space 50 Control Unit 51 Weather Cover 52 Exhaust Unit 53 Air Supply Unit 54 Exhaust Port 55 Backflow Prevention Plate 56 Heating Pipe 57 Heating pipe 58 Hot water heating section 60 Heat insulating material 60a First heat insulating material 60b Second heat insulating material 62a First side surface 62b Second side surface 64 Wall member 66 Connecting member 68 Terrace 70 塀 72 Waist wall 73 Floor Surface 74 Fuel cell storage chamber 82 Hot water supply pipe 86 Waste heat pipe 88 Waste heat pipe 98 Waste heat pump 99 Waste heat pump 100 Hot water storage system 110 Building

Claims (8)

A wall member that becomes the wall of the building,
There is a hot water storage space inside to store hot water,
The hot water storage space has a first side surface substantially parallel to the wall surface of the wall member, and a second side surface facing the first side surface,
A wall member comprising a connecting member that connects the first side surface and the second side surface and divides the hot water storage space into a plurality of partial spaces.   The wall member according to claim 2, wherein the connecting member has a communication port that communicates a lower portion of the partial space positioned above the connecting member and an upper portion of the partial space positioned below the connecting member. The first side surface and the second side surface are rectangular,
2. The wall member according to claim 1, wherein the connecting member is provided in a direction connecting rectangular diagonals of the first side surface or the second side surface in the hot water storage space. A building having a wall containing a hot water storage space for storing hot water therein,
The hot water storage space has a first side surface substantially parallel to the wall surface of the wall, and a second side surface facing the first side surface,
The said wall is a building which has a connection member which connects the said 1st side surface and the said 2nd side surface, and divides | segments the said hot water storage space into several partial space. A hot water storage space provided in a building wall for storing hot water and having a first side surface substantially parallel to the wall surface of the wall and a second side surface facing the first side surface; A hot water storage system comprising: a connecting member that connects a side surface and the second side surface and divides the hot water storage space into a plurality of partial spaces. The connecting member is provided substantially horizontally,
The hot water storage system according to claim 5, wherein the partial space located above the connecting member stores hot water having a temperature higher than that of the partial space located below the connecting member. Of the plurality of partial spaces, warm water stored in one partial space is heated using a heat amount from a heat source prior to the partial space located below the one partial space, and the one The hot water storage system according to claim 6, further comprising a control unit that heats the partial space located below the one partial space after warming the hot water stored in the partial space.   The hot water storage system according to claim 7, wherein the plurality of partial spaces store hot water heated using exhaust heat discharged by a fuel cell.

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