JP2016038113A - Heat source device with electric power generating function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an electric power generating device to efficiently operate with cooling water from a hot water storage tank.SOLUTION: Water for cooling guided out of a hot water storage tank 2 is supplied to an electric power generating device through a water supply passage to generate electric power, and waste heat thereof is used to prepare hot water in the hot water storage tank 2. The hot water storage tank 2 is arranged in a case, a fan provided at an air guide-out part is driven to introduce air into the case from outside, and at least a lower side of the hot water storage tank 2 is cooled with the air. Passage type cooling means 11 with a communication passage 12 linking the lower side of the hot water storage tank 2 to the water supply passage is provided on an outer circumferential lower end side of the hot water storage tank 2 in the case (with the outer circumferential lower end side of the hot water storage tank 2 enclosed with the communication passage 12), the passage type cooling means 11 cools water running in the communication passage 12 with the air introduced into the case, and the water having been cooled is introduced into the water supply passage.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a heat source device with a power generation function including a power generation device and a hot water storage tank.

  Various hot water storage tanks (hot water storage tanks) for storing hot water in the tank and heat source devices including the hot water storage tanks have been proposed (see, for example, Patent Document 1). FIG. 7 shows a heat source including a hot water storage tank. An example of an apparatus is shown. This heat source device has a hot water tank 2 and a power generator 1, and the hot water tank 2 is disposed in a case, for example. The power generator 1 is formed by a fuel cell (FC) such as a polymer electrolyte fuel cell (PEFC) or a solid oxide fuel cell (SOFC), a gas engine, or the like. A fuel cell is a power generation device that generates electricity by reacting hydrogen extracted from a fuel such as city gas with oxygen in the air by a reverse reaction of water electrolysis.

  In addition, this heat source device has a water supply passage 20 for supplying water from a water supply source to the hot water tank 2 from the lower side of the hot water tank 2, and for cooling to the power generator 1 from the lower side of the hot water tank 2, for example, 50 ° C. A water supply passage 21 for supplying water (preferably 45 ° C. or less) and hot water heated by the waste heat of the power generator 1 are sent to the hot water tank 2 side from the upper side of the hot water tank 2 to the hot water tank. 2 and a hot water passage 25 for supplying hot water from the upper side of the hot water storage tank 2 to the hot water supply destination. The hot water passage 25 is connected to a branch passage 29 branched from the water supply source via a connection unit 27, and the connection unit 27 is provided with an electromagnetic valve 26 and the like.

  A passage 30 is connected to the connection unit 27, and a water inlet side of a heat source device that directly supplies hot water to a hot water supply destination through the passage 30 or a hot water heater equipped with a burner or the like is connected to the passage 30. Various configurations have been proposed, such as a heat source device that additionally heats hot water that has passed through an auxiliary heat source device as necessary and supplies hot water to a hot water supply destination. In FIG. 7, reference numeral 24 denotes an overpressure relief passage provided with an overpressure relief valve for releasing the pressure to the outside when the pressure in the hot water tank 2 exceeds the allowable pressure. Reference numeral 28 denotes a drainage passage provided with a drainage valve.

  In this type of heat source device, for example, hot water heated by the waste heat of the power generation device 1 and stored in the hot water storage tank 2 is led out through the hot water passage 25, and this hot water and the water supply source are passed through the branch passage 29. The extracted water is mixed by the connection unit 27 as necessary, and hot water having a hot water supply set temperature can be supplied by supplying it to the hot water supply destination through the passage 30 as described above. Moreover, since the electric power can be used by supplying the electric power generated by the electric power generation apparatus 1 to the electric power load apparatus of the user, the apparatus is provided with convenience and energy saving.

  The hot water tank 2 is formed with a temperature layer in the vertical direction, and the upper layer (high temperature layer) of the hot water tank 2 is heated to a high temperature Ta heated by waste heat generated during power generation of the power generator 1. Hot water of (for example, 80 ° C.) is stored, and water at the same temperature Tc (for example, 15 ° C.) as the water supply temperature supplied to the hot water storage tank 2 is stored in the lower layer (low temperature layer) of the hot water storage tank 2. In the meantime, a layer (temperature intermediate layer) having a steep temperature gradient from temperature Ta to temperature Tc is formed. A broken line B in FIG. 7 indicates a boundary between the high temperature layer and the temperature intermediate layer, and is a temperature layer in which water (hot water) on the upper side of the broken line B is substantially used for hot water supply.

JP 2012-209173 A JP 2012-154554 A

  By the way, in the heat source device as described above, the boundary line B in FIG. 7 moves to a position far below the position shown in the figure so that most of the hot water tank 2 is filled with the high temperature layer. When reaching the lower side of the tank 2, the temperature of the water supplied to the power generator 1 through the water supply passage 21 becomes higher than 50 ° C. (for example, about 70 ° C.), and the power generator 1 cannot be operated. As a result, there is a problem that the power can not be used due to the operation of the power generator 1.

  Then, although the structure which provides a radiator in the water supply passage 21 is proposed, since a radiator is a machine for heat dissipation, when it does not need to radiate heat in winter etc., by performing heat radiation and radiating too much, There is a risk that the water passing through the water supply passage 21 will freeze.

  Moreover, the radiator of the capacity | capacitance which can fully cool the water supplied to the electric power generating apparatus 1 from the hot water storage tank 2 is large, For example, the large radiator was arrange | positioned by the problem of the restriction state that the arrangement | positioning place of a heat-source apparatus cannot be taken large. On top of that, a hot water storage tank 2 housed in the case is often provided, and in that case, it is necessary to reduce the capacity of the hot water storage tank 2 by the amount of the large radiator, which is sufficient for supplying to the user. You will not be able to store a large amount of hot water.

  In addition, as proposed in Patent Document 2, a configuration in which heat dissipating fins are provided on the lower outer wall surface of the hot water tank 2 has also been proposed. In this configuration, the outer wall surface of the stainless steel hot water tank 2 is usually used. In addition, copper radiating fins must be fixed by welding or the like, and it is very difficult to arrange and fix such radiating fins.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to efficiently operate a power generation device by cooling water from a hot water tank and to supply it to a user. An object is to provide a low-cost heat source device with a power generation function capable of storing a sufficient amount of hot water in a hot water storage tank.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, the first invention is a power generator, a hot water storage tank, a water supply passage for supplying cooling water derived from the lower side of the hot water tank to the power generator, and heating by waste heat of the power generator. A heat recovery passage for introducing the hot water into the hot water storage tank from the upper side of the hot water storage tank, and a hot water passage for supplying hot water to the hot water supply destination from the upper side of the hot water storage tank, Arranged in a case that covers the outer peripheral side of the hot water tank with a space from the hot water tank, air outside the case is introduced into the case from the lower end side of the case, and at least the lower part of the hot water tank is introduced by the air Air-cooling means for cooling the side, and a passage-type cooling means having a communication passage communicating the lower side of the hot water storage tank and the water supply passage is provided on the lower side of the hot water storage tank and the hot water storage tank in the case. Provided in at least one of the outer peripheral lower end side, the passage Cooling means is a means for solving the problems with the arrangement for introducing water which has been cooled by the cooling water passing through the communication passage by the air introduced into the casing during operation of the cooling means to the water supply passage.

  In addition to the configuration of the first invention, the second invention is characterized in that the communication passage of the passage-type cooling means is arranged in a swirling shape, a spiral shape, or a meandering shape.

  Further, in the third invention, in addition to the structure of the first or second invention, the passage-type cooling means is formed by providing a plurality of heat radiation fins on the outer peripheral side of the communication passage with a space therebetween. It is characterized by.

  Further, the fourth invention is characterized in that, in addition to the configuration of the first, second, or third invention, the power generation device is a fuel cell.

  According to the present invention, the cooling water is supplied to the power generator from the lower side of the hot water tank to operate the power generator, but the hot water tank is covered with the hot water tank on the outer peripheral side with a space therebetween. The water stored in the lower part of the hot water tank is cooled by introducing air outside the case into the case by air cooling means and cooling at least the lower part of the hot water tank with the air. be able to.

  The hot water in the hot water tank is cooled by the air introduced by the air cooling means through the inner wall of the hot water tank, and the cooling effect is obtained mainly on the inner trunk side surface along the inner wall of the hot water tank. However, since the cooled water moves to the lower side along the inner wall side of the hot water tank and settles and is stored, convection of hot water occurs because heat is transferred from the central side of the hot water tank. The hot water in the hot water tank is slowly cooled over time.

  On the other hand, in the present invention, the passage-type cooling means including a water supply passage for supplying cooling water from the hot water storage tank to the power generation device and a lower passage side of the hot water storage tank includes a hot water storage tank in the case. The passage-type cooling means is water that passes through the communication passage by the air introduced into the case of the hot water tank when the air cooling means is operated. Since the water in the hot water storage tank cooled by the air introduced into the case by the air cooling means as described above is further cooled when passing through the communication passage of the passage type cooling means, the water is cooled. This can be done quickly, and the water can be supplied to the power generator through the water supply passage.

  In other words, the passage-type cooling means further cools the water that has been warmed by being stored in the lower part of the hot water tank and cooled by the air introduced into the case by the air cooling means. However, since the water can be quickly and sufficiently cooled, the passage-type cooling means can be easily provided in the case of the hot water tank. Since the passage type cooling means can be made small, it is not necessary to reduce the capacity of the hot water storage tank by providing the passage type cooling means in the case. A heat source device can be formed.

  Since the passage-type cooling means is small as described above, it can be easily provided between the heat insulating material normally provided in the case and the hot water storage tank, so that a conventional radiator having a large radiator outside the case is provided. Unlike the proposal, it is possible to reliably prevent freezing of water passing through the passage-type cooling means, and it is possible to prevent problems caused by freezing of water.

  Furthermore, unlike the configuration in which the fins are provided on the outer wall of the hot water tank by welding or the like, the passage type cooling means can be easily formed by providing a communication path (pipe) that communicates the water supply passage and the hot water tank. A heat source device can be realized.

  Furthermore, by arranging the communication passages of the passage-type cooling means in a swirling shape, a spiral shape, or a meandering shape, a passage-type cooling means capable of efficient cooling can be easily formed.

  Furthermore, the passage-type cooling means that can further improve the cooling efficiency can be formed by forming the passage-type cooling means by providing a plurality of heat-dissipating fins on the outer peripheral side of the communication passage at intervals.

  Furthermore, by forming the power generation device with a fuel cell, it is possible to provide a heat source device with a power generation function capable of performing efficient power generation using the fuel cell.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic longitudinal sectional view (a), (b) and a transverse sectional view (c), (d) schematically showing a hot water storage tank and its peripheral structure applied to a heat source device according to the present invention. The schematic diagram (a) for demonstrating the lower part side structure of the hot water tank applied to the heat source apparatus of an Example, and the schematic diagram which shows the communicating path of the channel | path type cooling means provided in the lower part side of the hot water tank ( b). It is a longitudinal cross-sectional view which shows typically the example of the accommodation mode to the outer case of the hot water tank applied to the Example. It is the typical perspective view (a) which shows another example of the channel | path type cooling means applied to the heat source apparatus which concerns on this invention, and explanatory drawing (b) of the attachment position. It is a typical perspective view which shows another example of the channel | path type cooling means applied to the heat-source apparatus which concerns on this invention. It is typical cross-sectional explanatory drawing which shows the inside of the case of the hot water tank applied to the other Example of a heat-source apparatus corresponding to AA sectional drawing of FIG.1 (b). It is explanatory drawing which shows typically the system structural example of the heat-source apparatus with an electric power generation function.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the present embodiment, the same reference numerals are given to the same constituent elements as those in the above-described examples, and the duplicate description is omitted or simplified.

  1 (a) and 1 (b) are schematic longitudinal sectional views schematically showing a hot water storage tank and its peripheral structure applied to an embodiment of a heat source device according to the present invention, respectively. 1C is a simplified cross-sectional view taken along line AA in FIG. 1B, and FIG. 1D is a simplified cross-sectional view taken along line BB in FIG. 1B. Yes. 1A shows a CC cross section of FIG. 1C, and FIG. 1B shows a DD cross section of FIG. 1C.

  This embodiment has the same system configuration as that of the heat source device shown in FIG. 7, and similarly to FIG. 7, the hot water tank 2 has a water supply passage 21, a heat recovery passage 23, and a hot water passage. 25 etc. are connected, but description of those passages is omitted in FIG. Also in this embodiment, an appropriate configuration is applied to the configuration of the system connected to the passage 30 shown in FIG. 7, and the power generator 1 is formed of a fuel cell.

  As shown in these drawings, the hot water storage tank 2 is arranged in a case 3 that covers the outer peripheral side of the hot water storage tank 2 with a space from the hot water storage tank 2, and the case 3 is located on the lower side of the hot water storage tank 2. A bottom plate portion 17 provided, a cylindrical portion 18 provided above the bottom plate portion 17 and covering the outer peripheral side of the hot water tank 2, and a cap shape provided above the cylindrical portion 18 and covering the upper surface side of the hot water tank 2. And a portion 19.

  For example, as shown in FIG. 3, the hot water storage tank 2 accommodated in the case 3 includes an air introduction pipe 33 connected to the hot water storage tank 2 and an air lead-out pipe 32 together with an external case. In this embodiment, such a configuration is applied. 3 shows the diameters of the pipes 32 and 33 to make the explanation easy to understand and the width of the outer case 31 is considerably wider than the width of the case 3, but these sizes ( (Diameter and width) can actually be formed smaller than the mode shown in the figure, and the mode shown in FIG. 3 is not necessarily applied, and this configuration is not limited. .

  As shown in FIGS. 1A and 1B, an air introduction part 4 is provided on the bottom surface side of the bottom plate part 17, and as shown in FIGS. 1B and 1D, a cylindrical shape is provided. Air outlets 5 and 6 are provided at the lower side of the part 18. A fan 10 is provided on the outside of the case 3 at the formation part of the air outlets 5 and 6, and the fan 10 draws air outside the case 3 from the air introduction part 4 to the case by the suction force of the fan 10. 3 and functions as an air cooling means for cooling at least the lower side of the hot water tank 2 with the air.

  In the case 3, a heat insulating material 7 is provided inside the cylindrical portion 18, and the heat insulating material 7 is provided with a space between the outer peripheral wall of the hot water tank 2 and the outer peripheral wall of the hot water tank 2. Is formed in the case 3 in the vicinity of the. A plurality of air passages 8 (8 a) are formed in the portion where the heat insulating material 7 is spaced from the outer peripheral wall of the hot water tank 2 depending on the distance between the outer peripheral wall of the hot water tank 2 and the heat insulating material 7. The passage 8 (8a) is formed in the outer peripheral direction of the hot water tank 2 with a space between each other.

  Moreover, as shown in FIGS. 1B to 1D, an air passage 8 (8 b) is formed in the case 3 in such a manner that the hot water tank 2 is sandwiched from both sides via a heat insulating material 7. The upper end side of the air passage 8b communicates with the air passage 8a at a position above the cylindrical portion 18 (the communication portion is not shown). The lower end side of the air passage 8 (8b) communicates with the air outlets 5 and 6.

  As shown in FIG. 3, the air outlet 5 is electrically connected to the outside of the outer case 31 via the conduit 32, and the air introduction portion 4 is electrically connected to the outside of the outer case 31 via the conduit 33. In addition, both ends of the pipes 32 and 33 form the same pressure and same wind zone outside the outer case 31. In FIG. 3, there is no description about the pipe connected to the air outlet 6, but a pipe is connected to the air outlet 6 similarly to the air outlet 5, and one end side (air The side opposite to the connection side with the lead-out portion 6) forms the same pressure and same wind zone as the ducts 32 and 33 outside the outer case 31.

  In this embodiment, when the fan 10 provided in the air outlets 5 and 6 is driven, the air introduction unit 4 moves to the case through the passage 33 shown in FIG. 3 as indicated by the arrow in FIG. The air is introduced into 3 and passes through the air passage 8 (8 a) and proceeds upward along the outer peripheral side of the hot water tank 2 to absorb the heat of the hot water tank 2 to cool the hot water tank 2. In addition, as shown in FIG. 1 (b), the air heated by the heat absorption of the hot water tank 2 passes through the air passage 8 (8 b), and the hot water tank 2 is spaced from the hot water tank 2. Proceeding downward along the outer peripheral side, the air is led out of the case 3 from the air outlets 5 and 6. Then, this air passes through the pipe line 32 shown in FIG. 3 and is led out of the outer case 31. In addition, since the air passage 8 (8b) is arrange | positioned through the heat insulating material 7 with the hot water storage tank 2, it has comprised the structure which prevents that heat is transmitted from the warm air to the hot water storage tank 2 side.

  By such an air flow, the hot water in the hot water tank 2 is cooled by taking heat away from the inner wall of the hot water tank 2 (the inner wall of the hot water tank 2 becomes a heat radiating surface), and the cooled water is It moves to the lower side along the inner wall side of the hot water tank 2 and settles and is stored. In addition, since the cylindrical wall of the hot water tank 2 becomes a heat radiating surface in this way, it is better to send air to the upper side of the hot water tank 2 in order to make the heat radiating surface large.

  Further, FIG. 2 (a) shows the configuration of the lower side of the hot water tank 2 in a perspective view. As shown in this figure, in the present embodiment, the outer peripheral lower end side of the hot water tank 2 is wound. The passage type cooling means 11 is provided, and the passage type cooling device 11 is housed in the case 3 together with the hot water tank 2. This passage-type cooling means 11 includes a lower side of the hot water tank 2 and a water supply passage (not shown in the figure, but a water supply passage 21 for supplying cooling water from the hot water tank 2 to the power generator 1). The communication passage 12 is provided, and the water passing through the communication passage 12 is cooled by the air introduced into the case 3 of the hot water tank 2 when the fan 10 is operated, and the cooled water is introduced into the water supply passage. To do.

  The communication passage 12 and the outer wall of the hot water tank 2 are provided through an interval through which air passes (see FIGS. 1A and 1B). The communication passage 12 is, for example, one end shown in FIG. The side 13 is connected to the water supply passage 21 side, the other end side 14 is connected to the lower side of the hot water tank 2, and the outer peripheral side of the hot water tank 2 is swung (formed in a swirling shape). The length and the diameter of the communication passage 12 are not particularly limited and may be set as appropriate. For example, the passage diameter may be 10 mmφ and the length may be approximately five times the outer peripheral length of the hot water tank 2. it can. Further, a heat insulating material may be provided around the communication passage 12 or on the outer wall of the hot water tank 2 in which the communication passage 12 is disposed.

  The present embodiment is configured as described above, and by providing the fan 10 and the passage-type cooling means 11 as the air cooling means of the hot water tank 2 accommodated in the case 3, it is efficient with a small and simple structure. Since the water supplied from the hot water storage tank 2 to the power generation device 1 can be cooled, the hot water storage using the waste heat generated during the power generation of the power generation device 1 and the cooling water supplied from the hot water storage tank 2 to the power generation device 1 are used. Thus, it is possible to realize a device that can efficiently and satisfactorily generate power by the power generation device 1.

  In this embodiment, as shown in FIG. 1 (d), the air outlets 5 and 6 are provided with a shutter 35 outside the fan 10, so that when the shutter 35 is closed, the air is led out. Although air should not enter even if air enters from the parts 5 and 6, when a strong wind blows, the air tends to flow in the direction in which the air enters from the gap between the louvers forming the shutter 35 (according to the wind). Air may try to get in).

  However, the case 3 has an inverted U shape with respect to the formation positions of the air outlets 5 and 6, and is stored on the lower side of the hot water tank 2 even if air blows from the gap between the louvers. Since the water is cold, heat exchange between the air and the water in the hot water tank does not occur, and the cold wind entering from outside shows the air passage 8b in the inverted U-shaped case 3 with respect to the position where the air outlets 5 and 6 are formed. As a result, when the fan 10 is stopped, heat is trapped and no heat is dissipated (if the fan 10 is driven, as described above, the air introduction portion does not go up. 4), air entering from 4 travels upward in the air passage 8a and then exits from the air outlets 5 and 6 through the air passage 8b downward.

  Further, in this embodiment, the pipes 32 and 33 are connected to the air outlets 5 and 6 and the air introduction part 4 as shown in FIG. 3, and one end side thereof (the air outlet part of the pipes 32 and 33). 5 and 6 and the side opposite to the connection side with the air introduction part 4) have the same pressure and same wind zone, so that the force to enter the air and the force to get out are balanced. Even if it blows, air is not introduced from the air outlets 5 and 6, and it is possible to more reliably prevent air from entering and exiting when the fan 10 is stopped.

  In addition, this invention is not limited to the said Example, It sets suitably. For example, in the above-described embodiment, one air introduction part 4 for introducing air into the case 3 is provided, and two air outlet parts for deriving air from the case 3 are provided as indicated by reference numerals 5 and 6. Arrangement modes such as the number, arrangement position, size, etc. are not particularly limited and are appropriately set, and are formed so that at least the lower side of the hot water tank 2 arranged in the case 3 can be air-cooled. Just do it. Moreover, the arrangement | positioning aspect of the fan 10, the connection aspect of the pipe lines 32 and 33, etc. are not specifically limited, It sets suitably.

  Moreover, in the said Example, the channel | path type cooling means 11 which has the communicating channel | path 12 as shown in FIG.2 (b) is provided in the aspect wound around the outer peripheral side of the hot water tank 2 as shown in Fig.2 (a). However, the form and arrangement of the communication passage 12 of the passage-type cooling means 11 are not particularly limited and are appropriately set. At least one of the lower side of the hot water tank 2 and the lower end of the outer periphery in the case 3 It may be provided in.

  For example, as shown in FIG. 4A, the passage-type cooling means 11 may be formed by providing a plurality of heat radiation fins 15 at intervals on the outer peripheral side of the communication passage 12. If the passage-type cooling means 11 is provided with such a heat dissipating fin 15, the cooling efficiency can be very high, so that the passage-type cooling means 11 can be further downsized. Such a passage-type cooling means 11 can be provided on the lower side of the hot water tank 2, for example, as shown in FIG. 4B, and in this case also, the region where the passage-type cooling means 11 is disposed. By forming the air passage so that the air passes through the water, the water supplied from the hot water tank 2 to the power generation device 1 can be efficiently cooled.

  Further, for example, a spiral communication passage 12 as shown in FIG. 5A or a meandering communication passage 12 as shown in FIG. 5B is connected to one end side 13 of the water supply passage 21. Then, the other end side 14 is connected to the lower side of the hot water tank 2 to form the passage-type cooling means 11, and, similar to the position of the passage-type cooling means 11 shown in FIG. It may be provided on the lower side.

  Further, as described above, the hot water in the hot water tank 2 is cooled by taking heat through the inner wall of the hot water tank 2 due to the air flow, and the cooling effect is mainly due to the inner cylinder along the inner wall of the hot water tank 2. Although it is obtained on the side surface, the cooled water moves to the lower side along the inner wall side of the hot water tank 2 and settles, and heat is transferred from the central side of the hot water tank 2 until it is stored. The center part side of the hot water tank 2 is also cooled somewhat. Therefore, the inner wall of the hot water tank 2 is placed inside the hot water tank 2 so that the water on the inner body side along the inner wall of the hot water tank 2 cooled by air cooling is less likely to receive heat from the center side of the hot water tank 2. A cylindrical body may be disposed with a gap therebetween. By doing in this way, it can become difficult to receive the heat transmission from the center part of the hot water tank 2, and a convection can be suppressed.

  Furthermore, the formation position of the air passage 8 (8b) is not limited as in the above embodiment, and may be formed at a position as shown in FIG. 6, for example. In addition, although the air derivation | leading-out parts 5 and 6 are not illustrated in FIG. 6, the air derivation | leading-out parts 5 and 6 are also formed in the position corresponding to the formation position of the air channel | path 8b.

  Furthermore, the power generator 1 can also be formed by a gas engine.

  Since the heat source device of the present invention can efficiently operate the power generation device and store hot water in a hot water storage tank, it is easy to use and can be used as, for example, a household heat source device.

DESCRIPTION OF SYMBOLS 1 Power generator 2 Hot water storage tank 3 Case 4 Air introduction part 5,6 Air derivation part 7 Heat insulating material 8 Air passage 10 Fan 11 Passage type cooling means 12 Communication passage 15 Fin 21 Water supply passage

Claims (4)

  A power generation device, a hot water storage tank, a water supply passage for supplying cooling water derived from the lower side of the hot water storage tank to the power generation device, and hot water heated by the waste heat of the power generation device. A heat recovery passage to be introduced into the hot water storage tank from the upper side, and a hot water passage for supplying hot water to the hot water supply from the upper side of the hot water storage tank, and the hot water storage tank has an outer peripheral side of the hot water storage tank. An air cooling means is provided in the case that covers the hot water storage tank with a space therebetween, and introduces air outside the case into the case from the lower end side of the case and cools at least the lower side of the hot water storage tank with the air. And a passage-type cooling means having a communication passage communicating the lower side of the hot water storage tank and the water supply passage is provided on at least one of the lower side of the hot water storage tank and the outer peripheral lower end side of the hot water storage tank. The passage type cooling means is the air cooling means. With the power generation function heat source device, wherein a water cooling the cooling water passing through the communication passage and configured to be introduced into the water supply passage by the air introduced into the casing during operation.   2. The heat source device with a power generation function according to claim 1, wherein the communication passage of the passage-type cooling means is arranged in a swirling shape, a spiral shape, or a meandering shape.   3. The heat source device with a power generation function according to claim 1, wherein the passage-type cooling means is formed by providing a plurality of heat radiation fins at intervals on the outer peripheral side of the communication passage.   4. The heat source device with a power generation function according to claim 1, wherein the power generation device is a fuel cell.

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