JP6313106B2 - Hybrid system - Google Patents

Description

  The present invention relates to a hybrid system in which a thermoacoustic cooler and a fuel cell device are combined.

  In recent years, as a next-generation energy, a fuel cell module in which a fuel cell capable of obtaining electric power using a fuel gas (hydrogen-containing gas) and an oxygen-containing gas (air) is stored in a storage container, or a fuel cell Various fuel cell devices in which a module is housed in an outer case have been proposed (see, for example, Patent Document 1).

  In recent years, a thermoacoustic refrigerator having a refrigeration function using thermoacoustic energy has been proposed (see, for example, Patent Document 2).

JP 2007-59377 A JP2013-117325A

  As described above, various devices such as fuel cell devices and thermoacoustic refrigerators have been developed for the development of next-generation energy, but there is still room for further study on the development of new applications that combine these devices. There is.

  Therefore, an object of the present invention is to provide a new application in which a thermoacoustic cooler using thermoacoustic energy and a fuel cell device are combined.

A hybrid system of the present invention includes a fuel cell device including a fuel cell, and a thermoacoustic cooler having a cooling unit having a cooling function using heat of exhaust gas discharged from the fuel cell device. cooler includes a prime mover, a condenser, and a connection pipe that connects the said cooling machine and the prime mover, before Symbol prime mover, at least a portion of the cooling machine and the connecting pipe, provided with a first branch pipe A valve is provided at the first branch pipe or a connection portion of the first branch pipe, and a switch for opening the first branch pipe, and when the switch is turned on, A control device that controls to open the valve so as to open the first branch pipe is provided.

  The hybrid system of the present invention can have a crime prevention function in addition to a cooling function using exhaust gas discharged from the fuel cell device.

It is a block diagram which shows an example of a structure of the hybrid system of this embodiment. It is an external appearance perspective view which shows an example of the fuel cell module which comprises the fuel cell apparatus of this embodiment. FIG. 3 is a cross-sectional view of the fuel cell module shown in FIG. 2. It is a block diagram which shows an example of the other structure of the hybrid system of this embodiment. It is a block diagram which shows an example of the further another structure of the hybrid system of this embodiment.

  FIG. 1 is a configuration diagram showing an example of the configuration of the hybrid system of the present embodiment, FIG. 2 is an external perspective view showing an example of the fuel cell module shown in FIG. 1, and FIG. 3 is a fuel cell shown in FIG. It is sectional drawing of a module. In the following drawings, the same numbers are assigned to the same members.

  The hybrid system shown in FIG. 1 generates thermoacoustic energy using a power generation unit that is an example of a fuel cell device and exhaust gas discharged from the power generation unit, and performs cooling (freezing) using the generated thermoacoustic energy. And a thermoacoustic cooler.

  A power generation unit which is a fuel cell device shown in FIG. 1 includes a cell stack 2 having a plurality of fuel cells, a raw fuel supply means 4 for supplying raw fuel such as city gas, and a fuel cell constituting the cell stack 2 An oxygen-containing gas supply means 5 for supplying an oxygen-containing gas to the cell, and a reformer 3 for steam-reforming the raw fuel with the raw fuel and steam are provided. As will be described later, the fuel cell module 1 (hereinafter sometimes abbreviated as module 1) is configured by storing the cell stack 2 and the reformer 3 in a storage container. In FIG. It is shown surrounded by a two-dot chain line. Although not shown in the figure, the module 1 is provided with an ignition device for burning fuel gas that has not been used in power generation.

  Further, the power generation unit shown in FIG. 1 includes a cooling device 6 for reducing the temperature of exhaust gas (exhaust heat) generated by power generation of the fuel cells constituting the cell stack 2. In addition, as the cooling device 6, a radiator, a heat exchanger, etc. can be used, for example. Further, in the cooling device 6, the condensed water treatment device 7 for treating the condensed water obtained by condensing the moisture contained in the exhaust gas into pure water, water treated by the condensed water treatment device 7 (pure water) ) Is stored, and the water tank 8 and the cooling device 6 are connected by a condensed water supply pipe 9. In addition, depending on the quality of the condensed water produced | generated by the heat exchange in the cooling device 6, it can also be set as the structure which does not provide the condensed water processing apparatus 7. FIG. Further, when the condensed water treatment device 7 has a function of storing water, the water tank 8 can be omitted.

  The water stored in the water tank 8 is supplied to the reformer 3 by a water pump 11 provided in a water supply pipe 10 that connects the water tank 8 and the reformer 3.

  Further, the power generation unit shown in FIG. 1 converts the DC power generated by the module 1 into AC power, and adjusts the supply amount of the converted electricity to the external load (power conditioner). 12. A control device 13 for controlling the operation of various devices is provided. By storing each device constituting these power generation units in an exterior case, a fuel cell device that can be easily installed can be obtained.

  Next, the thermoacoustic cooler 14 will be described. In FIG. 1, the thermoacoustic cooler 14 is surrounded by a two-dot chain line. The thermoacoustic cooler 14 includes a prime mover 15, a cooler 16, and a connection pipe 17 that connects the prime mover 15 and the cooler 16. The prime mover 15, the cooler 16, and the connecting pipe 17 are filled with a gas such as helium gas. The prime mover 15 and the cooler 16 are provided with heat accumulators 18 and 19, respectively. With one side of the regenerator 18 of the prime mover 15 as a high temperature part 22 (upper side in FIG. 1) and the other side as a low temperature part 20 (lower side in FIG. 1), thermoacoustic energy (sound waves) is generated by this temperature gradient.

Therefore, as will be described later, the exhaust gas discharged from the module 1 flows around the high temperature portion 22 of the regenerator 18. On the other hand, in FIG. 1, although nothing is provided in the low temperature part 20, in order to generate thermoacoustic energy more efficiently, a low temperature refrigerant (for example, tap water) is allowed to flow around the low temperature part 20. It can also be configured. The high temperature part 22, the low temperature part 20, and the heat accumulator 18 become a thermoacoustic energy generation part, and are indicated by broken lines in FIG.

  The thermoacoustic energy generated in the thermoacoustic energy generator resonates when flowing through the prime mover 15 and the connecting pipe 17, and the thermoacoustic energy is propagated to the cooler 16. In the cooler 16, thermoacoustic energy is converted into heat energy. An endothermic reaction occurs in the low temperature part 21 (lower side in FIG. 1) which is the other side of the heat storage unit 19 by flowing a fluid through the high temperature part 23 (upper side in FIG. 1) which is one side of the heat storage unit 19. As a result, the temperature is lowered and a cooling function is provided. That is, a cooling unit is configured including the heat accumulator 19, the high temperature unit 23, and the low temperature unit 21, and is indicated by a broken line in FIG.

  In the cooling part, the high temperature part 23 only needs to be at a higher temperature than the low temperature part 21 and does not necessarily have to be a generally high temperature. In particular, by lowering the temperature of the high-temperature part 23, the low-temperature part 21 is further lowered in temperature, and has a refrigeration function more efficiently. In other words, the cooling unit has a function as a freezing unit. Therefore, in FIG. 1, a cold water pipe 24 to be described later is provided so that water flowing in the cold water pipe 24 flows around the low temperature part 21 and then flows around the high temperature part 23. The cold water pipe 24 may be provided so as to flow only around the high temperature part 23.

  And in the hybrid system shown in FIG. 1, the cooler 16 of the thermoacoustic cooler 14 mentioned above is accommodated in the building. Thereby, the temperature in the building can be lowered. As such a building, in addition to a general house, for example, it can be a commercial facility such as a convenience store or a supermarket. In addition, when arrange | positioning the cooler 16 of the thermoacoustic cooler 14 in a commercial facility, you may arrange | position in a refrigerator compartment or a freezer compartment. When this hybrid system is provided in a commercial facility, electric power can be obtained by the fuel cell device, and a cooling (freezing) function can be obtained by the thermoacoustic cooler 14, so that the system can be made particularly efficient.

  Hereinafter, the operation method of the fuel cell device in the hybrid system shown in FIG. 1 will be described. At the time of starting the fuel cell device, the control device 13 operates the raw fuel supply means 4, the oxygen-containing gas supply means 5, the water pump 11, and the ignition device. At this time, since the temperature of the module 1 is low, power generation in the fuel cell and reforming reaction in the reformer 3 are not performed. The fuel gas supplied by the raw fuel supply means 4 is almost entirely burned as fuel gas not used for power generation, and the temperature of the module 1 and the reformer 3 rises due to the heat of combustion. In the reformer 3, when the temperature reaches a temperature at which steam reforming is possible, steam reforming is performed, and fuel gas, which is a hydrogen-containing gas necessary for power generation of the fuel cell, is generated. The control device 13 may control the water pump 11 to operate after the reformer 3 reaches a temperature at which steam reforming is possible. When the fuel cell reaches a temperature at which power generation can be started, it starts power generation using the fuel gas generated by the reformer 3 and the oxygen-containing gas supplied from the oxygen-containing gas supply means 5. The electricity generated in the cell stack 2 is converted into alternating current by the supply power adjusting unit 12 and then supplied to an external load.

In addition, after power generation is started in the fuel cell, the control device 13 sets the fuel utilization rate (Uf), air utilization rate (Ua), revision, and the like that are set in advance to efficiently operate the fuel cell device. Based on the value of S / C which is the ratio of the molar ratio of carbon and water in the fuel in the steam reforming in the mass device 3, the operations of the raw fuel supply means 4, the oxygen-containing gas supply means 5, the water pump 11 and the like are performed. Control. The fuel utilization rate is a value obtained from the amount of fuel gas used in power generation / the amount of fuel gas (raw fuel) supplied from the raw fuel supply means 4, and the air utilization rate is used in power generation. This is a value obtained from the amount of air supplied / the amount of air supplied from the oxygen-containing gas supply means 5.

  The exhaust gas generated with the operation of the fuel cell device then flows toward the thermoacoustic cooler 14. The exhaust gas that has flowed toward the thermoacoustic cooler 14 flows through the high-temperature unit 22 that constitutes the thermoacoustic energy generation unit in the prime mover 15 of the thermoacoustic cooler 14. Specifically, a pipe (flow path) through which exhaust gas discharged from the module 1 flows is provided so as to surround the periphery of one side (the high temperature part 22) of the pipe in which the heat accumulator 18 is disposed. With such a configuration, the exhaust gas flows through the high temperature portion 22 of the thermoacoustic energy generation unit. Also in the following description, each pipe is arranged so as to surround the circumference of the pipe of the thermoacoustic cooler 14, and each fluid flows through each part of the thermoacoustic cooler 14.

  Thereby, a temperature gradient is produced on one side and the other side of the heat accumulator 18, and thermoacoustic energy can be generated. In addition, since the low temperature part 20 which is a thermoacoustic energy generation part can generate | occur | produce a thermoacoustic energy more efficiently because a temperature difference with the high temperature part 22 becomes large, for example, normal temperature tap water etc. in the low temperature part 20 Can also be supplied. In addition, it is also possible to use together the fluid which flows through the cold water piping 24 provided in the high temperature part 23 or the low temperature part 21 of the cooler 16.

  The exhaust gas after flowing through the high temperature part 22 of the thermoacoustic energy generating part then flows to the cooling device 6. Here, the water contained in the exhaust gas is generated as condensed water by being cooled by the cooling device 6. By using this condensed water for the steam reforming reaction in the reformer 3, a fuel cell device capable of water self-sustained operation can be obtained.

  Such a hybrid system in which the fuel cell device and the thermoacoustic cooler 14 are combined has both power in the fuel cell device and a cooling (refrigeration) function in the thermoacoustic cooler 14. It becomes an efficient system. In particular, the cooling (freezing) function of the thermoacoustic cooler 14 is particularly useful in commercial facilities where drinking water, frozen products, and the like are stored.

  Below, the module 1 which comprises the fuel cell apparatus of this embodiment is demonstrated using FIG. 2 and FIG.

  FIG. 2 is an external perspective view showing an example of a module in the fuel cell apparatus constituting the hybrid system of the present embodiment, and FIG. 3 is a cross-sectional view of FIG.

  In the module 1 shown in FIG. 2, a columnar fuel cell 29 having a fuel gas flow path (not shown) through which fuel gas flows is arranged in a row inside the storage container 31. The adjacent fuel cells 29 are electrically connected in series via current collecting members (not shown in FIG. 2), and the lower end of the fuel cells 29 is insulated with a glass sealing material or the like. Two cell stacks 2 fixed to the manifold 30 with bonding materials (not shown) are provided, and a reformer 3 for generating fuel gas to be supplied to the fuel cells 29 is disposed above the cell stack 2. The cell stack device 37 is accommodated. At both ends of the cell stack 2, conductive members having electrical lead portions for collecting the electricity generated by the power generation of the cell stack 2 (fuel cell 29) and drawing it out are disposed ( Not shown). The cell stack device 37 is configured by including the above-described members. 3 shows the case where the cell stack device 37 includes two cell stacks 2, the number can be changed as appropriate. For example, even if only one cell stack 2 is provided. Good.

In FIG. 2, the fuel battery cell 29 is a hollow flat plate type having a fuel gas passage through which fuel gas flows in the longitudinal direction, and a fuel electrode layer is formed on the surface of the support having the fuel gas passage. A solid oxide fuel cell 29 in which a solid electrolyte layer and an oxygen electrode layer are sequentially laminated is illustrated. An oxygen-containing gas flows between the fuel cells 29. By using the solid oxide fuel cell 29 as the fuel cell 29, the temperature of the exhaust gas discharged from the fuel cell device is very high, and a more efficient hybrid system can be obtained.

  Further, in the fuel cell device of the present embodiment, when the fuel cell 29 is a solid oxide fuel cell, in addition to the hollow plate type, for example, a plate type or a cylindrical type can be used. The shape of the storage container 31 can also be changed as appropriate.

  Further, in the reformer 3 shown in FIG. 2, the raw gas such as natural gas and kerosene supplied through the raw fuel supply pipe 36 is reformed to generate fuel gas. The reformer 3 preferably has a structure capable of performing steam reforming, which is an efficient reforming reaction. The reformer 3 reforms the raw fuel into fuel gas, and a vaporizer 33 for vaporizing water. And a reforming section 34 in which a reforming catalyst (not shown) is disposed. The fuel gas generated by the reformer 3 is supplied to the manifold 30 via the fuel gas flow pipe 35 and is supplied from the manifold 30 to the fuel gas flow path provided inside the fuel battery cell 29.

  FIG. 2 shows a state where a part (front and rear surfaces) of the storage container 31 is removed and the cell stack device 37 stored inside is taken out rearward. Here, in the module 1 shown in FIG. 2, the cell stack device 37 can be slid and stored in the storage container 31.

  The storage container 31 is disposed between the cell stacks 2 juxtaposed on the manifold 30, so that the oxygen-containing gas flows from the lower end portion toward the upper end portion of the fuel cell 29. A contained gas introduction member 32 is disposed.

  As shown in FIG. 3, the storage container 31 constituting the module 1 has a double structure having an inner wall 39 and an outer wall 40, and an outer frame of the storage container 31 is formed by the outer wall 40, and a cell stack is formed by the inner wall 39. A power generation chamber 41 that houses the device 37 is formed. Further, in the storage container 31, an oxygen-containing gas flow path 42 through which the oxygen-containing gas introduced into the fuel cell 29 circulates between the inner wall 39 and the outer wall 40.

  Here, the storage container 31 is provided with an oxygen-containing gas inlet (not shown) for allowing oxygen-containing gas to flow into the upper end side from the upper part of the storage container 31 and a flange portion 43, and fuel at the lower end portion. An oxygen-containing gas introduction member 32 provided with an oxygen-containing gas outlet 38 for introducing an oxygen-containing gas at the lower end of the battery cell 29 is inserted through the inner wall 39 and fixed. A heat insulating member 44 is disposed between the flange portion 43 and the inner wall 39.

  In FIG. 3, the oxygen-containing gas introduction member 32 is arranged so as to be positioned between two cell stacks 2 juxtaposed inside the storage container 31, but is appropriately arranged depending on the number of cell stacks 2. can do. For example, when only one cell stack 2 is stored in the storage container 31, two oxygen-containing gas introduction members 32 can be provided and disposed so as to sandwich the cell stack 2 from both side surfaces.

  Further, in the power generation chamber 41, the temperature in the module 1 is maintained at a high temperature so that the heat in the module 1 is extremely dissipated and the temperature of the fuel cell 29 (cell stack 2) is lowered and the power generation amount is not reduced. A heat insulating member 44 is appropriately provided.

The heat insulating member 44 is preferably disposed in the vicinity of the cell stack 2. In particular, the heat insulating member 44 is disposed on the side surface side of the cell stack 2 along the arrangement direction of the fuel cells 29, and the fuel cell unit on the side surface of the cell stack 2. It is preferable to arrange the heat insulating member 44 having a width equal to or greater than the width along the 29 arrangement directions. In addition, it is preferable to arrange the heat insulating members 44 on both side surfaces of the cell stack 2. Thereby, it can suppress effectively that the temperature of the cell stack 2 falls. Furthermore, the oxygen-containing gas introduced from the oxygen-containing gas introduction member 32 can be prevented from being discharged from the side surface side of the cell stack 2, and the flow of the oxygen-containing gas between the fuel cells 29 constituting the cell stack 2. Can be promoted. In the heat insulating members 44 arranged on both side surfaces of the cell stack 2, the flow of the oxygen-containing gas supplied to the fuel cell 29 is adjusted, and the longitudinal direction of the cell stack 2 and the stacking direction of the fuel cell 29 are adjusted. An opening 45 is provided to reduce the temperature distribution at.

  Further, an exhaust gas inner wall 46 is provided inside the inner wall 39 along the arrangement direction of the fuel cells 29, and the exhaust gas in the power generation chamber 41 is located between the inner wall 39 and the exhaust gas inner wall 46 from above. The exhaust gas flow path 47 flows downward. The exhaust gas channel 47 communicates with an exhaust hole 48 provided at the bottom of the storage container 31. A heat insulating member 44 is also provided on the exhaust gas inner wall 46 on the cell stack 2 side.

  As a result, the exhaust gas generated by the operation of the module 1 (during start-up processing, power generation, and stop processing) flows through the exhaust gas passage 47 and is then exhausted from the exhaust hole 48. The exhaust hole 48 may be formed by cutting out a part of the bottom of the storage container 31, or may be formed by providing a tubular member.

  Note that a thermocouple 50 for measuring the temperature in the vicinity of the cell stack 2 is provided inside the oxygen-containing gas introduction member 32, and the temperature measuring portion 49 is the central portion in the longitudinal direction of the fuel cell 29 and the fuel cell. It arrange | positions so that it may be located in the center part in the arrangement direction of 29.

  Further, in the module 1 having the above-described configuration, the fuel gas and the oxygen-containing gas that have not been used for power generation discharged from the fuel gas passages in at least some of the fuel cells 29 are disposed on the upper end side of the fuel cells 29. And the reformer 3, the temperature of the fuel cell 29 can be raised and maintained. In addition, the reformer 3 disposed above the fuel cell 29 (cell stack 2) can be warmed, and the reformer 3 can efficiently perform the reforming reaction. During normal power generation, the temperature in the module 1 is about 500 to 800 ° C. with the combustion and power generation of the fuel cell 29. Therefore, the temperature of the exhaust gas discharged from the module 1 becomes very high, and an efficient hybrid system can be obtained.

  By the way, particularly in commercial facilities, a more efficient system is required. Therefore, in the hybrid system of the present embodiment, the first branch pipe 25 or the first branch pipe 25 is provided in at least a part of the prime mover 15, the cooler 16, and the connection pipe 17. A valve 26 is provided at the connection portion of the tube 25.

  In the prime mover 15, the cooler 16, and the connecting pipe 17, sound waves flow through the respective pipes as described above. By opening a part of each pipe, sound waves are emitted to the outside, and as a result, sound is generated.

  Therefore, particularly when the hybrid system of the present embodiment is arranged in a commercial facility, the hybrid system also functions as a security device.

Specifically, in the hybrid system shown in FIG. 1, a first branch pipe 25 extending outside the building is connected to the connection pipe 17, and a valve 26 is provided in the first branch pipe 25. . In addition, a crime prevention switch 28 in the building, and a building control device 27 that controls the operation of the valve 26 by detecting ON / OFF of the switch 28 (hereinafter may be simply referred to as a control device 27). Is provided.

  That is, when the control device 27 detects that the switch 28 is turned on in the building, the control device 27 performs control to open the valve 26 so as to open the first branch pipe 25. Thereby, sound is generated from the first branch pipe 25 by opening the first branch pipe 25. This sound plays the role of a security buzzer, and the hybrid system of this embodiment also functions as a security device.

  Here, in the hybrid system shown in FIG. 1, an example in which the first branch pipe 25 is provided to extend outside the building, in other words, an example in which all of the first branch pipe 25 is provided outside the building is shown. Yes. Thereby, it is possible to easily notify a person outside the building that an abnormality has occurred in the building.

  In addition, in the hybrid system shown in FIG. 1, an example is shown in which the first branch pipe 25 is provided in the connection pipe 17, but it may be provided in any of the prime mover 25, the cooler 16, and the connection pipe 17. Absent. In addition to the first branch pipe 25, the valve 26 may be provided at a connection portion of the first branch pipe 56.

  Incidentally, the hybrid system shown in FIG. 1 shows an example in which the fuel cell device and the prime mover 15 are provided outside the building, but the fuel cell device and the prime mover 15 can also be provided in the building.

  FIG. 4 is a configuration diagram illustrating another example of the hybrid system of the present embodiment. Compared to the hybrid system shown in FIG. 1, the first branch pipe 25 is different in that it extends into the building.

  When the first branch pipe 25 is opened and a sound is generated outside, if the sound is loud, there may be a complaint with neighboring residents.

  Therefore, in the hybrid system shown in FIG. 4, by making the first branch pipe 25 into the building, when the first branch pipe 25 is opened, the sound echoes in the building. While suppressing the sound divergence to the outside, it is possible to easily notify a person inside the building that an abnormality has occurred in the building, and the hybrid system of this embodiment can also have a crime prevention function. .

  FIG. 4 shows an example in which the tip portion of the first branch pipe 25 is located in the building, but the first branch pipe 25 is provided so that the entire first branch pipe 25 is located in the building. May be.

  FIG. 5 is a configuration diagram illustrating another example of the hybrid system of the present embodiment. Compared with the hybrid system shown in FIG. 1, the second branch pipe 51 is provided in the first branch pipe 25 and the valve 52 is provided in the second branch pipe 51. Yes. In the hybrid system shown in FIG. 5, the first branch pipe 25 is provided extending outside the building, and the second branch pipe 51 is provided extending inside the building.

In such a hybrid system, when the control device 27 detects that the switch 28 is turned ON in the building, the control device 27 opens the valve so as to open each of the first branch pipe 25 and the second branch pipe 51. 26 and the valve 52 are controlled to be opened. Thereby, each of the first branch pipe 25 and the second branch pipe 51 is opened, so that sound is generated from the first branch pipe 25 and the second branch pipe 51. Therefore, it is possible to notify a person outside the building and a person inside the building that an abnormality has occurred inside the building.

  In the hybrid system shown in FIG. 4, an example in which the second branch pipe 51 is provided in the first branch pipe 25 is shown. It doesn't matter. In addition to the second branch pipe 51, the valve 52 may be provided at the connection portion of the second branch pipe 51.

  Although the present invention has been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and improvements can be made without departing from the scope of the present invention.

  For example, in the hybrid system described above, a fuel cell device including a solid oxide fuel cell as an example of the fuel cell device has been described. However, for example, a solid polymer fuel cell device may be used. When a solid polymer fuel cell device is used, for example, heat generated in the reforming reaction may be effectively used, and the configuration may be changed as appropriate.

  Furthermore, when the hybrid system of the present embodiment is provided in a commercial facility, a plurality of first branch pipes 25 and second branch pipes 51 may be provided in accordance with the size of the commercial facility.

  Furthermore, although the control device 27 has shown an example of controlling the switch 28 to open and close each valve by detecting ON / OFF of the switch 28, the control device 27 has been described with respect to the control for opening or closing the valve. The valve can be controlled to open by transmitting a signal for opening or closing the valve to the control device 27.

  Furthermore, although the example which provided the control apparatus which performs control which opens a valve in the building was shown, it can also be provided in the exterior of a building.

1: fuel cell module 14: thermoacoustic cooler 15: prime mover 16: cooler 17: connecting pipe 25: first branch pipe 26, 52: valve 27: indoor control device 28: switch 51: second branch pipe

Claims (5)

A fuel cell device including a fuel cell, and a thermoacoustic cooler having a cooling unit having a cooling function using heat of exhaust gas discharged from the fuel cell device, the thermoacoustic cooler including a prime mover, and condenser, and a connection pipe that connects the said cooling machine and the prime mover, before Symbol prime mover, at least a portion of the cooling machine and the connecting pipe, a first branch pipe is provided, the first Is provided with a valve at the branch pipe or a connection portion of the first branch pipe, and a switch for opening the first branch pipe, and the first branch pipe is opened when the switch is turned ON. A hybrid system comprising: a control device that controls to open the valve .   The hybrid system according to claim 1, wherein the cooler is housed in a building, and the first branch pipe extends outside the building.   The hybrid system according to claim 1, wherein the cooler is housed in a building, and the first branch pipe extends in the building.   The cooler is housed in a building, and a second branch pipe is provided in at least a part of the first branch pipe or the prime mover, the cooler, and the connection pipe. A valve is provided at the connecting portion of the second branch pipe or the second branch pipe, and the first branch pipe extends outside the building, and the second branch pipe is provided inside the building. The hybrid system according to claim 1, wherein the hybrid system is extended.   A switch that opens the first branch pipe and the second branch pipe, and when the switch is turned on, the valve is opened to open the first branch pipe and the second branch pipe. The hybrid system according to claim 4, further comprising: a control device that performs control as described above.

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