Power generation system

Abstract

To provide a power generation system that can reduce installation costs.SOLUTION: A power generation system (1) includes a fluid machine (12), a generator (13), and devices (14, 15). The fluid machine (12) is connected to a first pipe (11) and is rotationally driven by a fluid (F) flowing through the first pipe (11). The generator (13) is rotationally driven by the fluid machine (12). The fluid machine (12) and the generator (13) are arranged inside a machine room (P). The devices (14, 15) are provided in the first pipe (11). A portion of the first pipe (11) where the devices (14, 15) are provided is arranged inside a second pipe (16) having open end faces (16ae1, 16be1) inside the machine room (P).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to power generation systems. [Background technology]

[0002] Inline power generation systems that utilize unused energy in the pipelines of water supply facilities are known. An inline power generation system consists of a power generation device, a water control valve that adjusts the flow rate, a flow meter, and piping.

[0003] The power generating device disclosed in Patent Document 1 includes a water turbine disposed in a flow path and a generator connected to the water turbine. The water turbine is rotated by the fluid flowing through the flow path. When the water turbine rotates, the generator is driven. The driven generator generates electricity.

[0004] Because water control valves can cause vibration and noise and are prone to unstable operation, and because flow meters require measurement accuracy, a certain pipe length is required to install the motor-operated valve and flow meter.

[0005] The cost of installation is a large part of the introduction cost of an inline power generation system. Therefore, in order to reduce the installation cost, the power generation system is sometimes installed in an existing water supply facility such as an instrument room or a water control valve room, thereby reducing the cost of installing a new building. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-214710 Summary of the Invention [Problem to be solved by the invention]

[0007] The size of existing facilities such as instrument rooms and water control valve rooms varies depending on their use. If the space in the existing facility is insufficient to install a power generation system, it becomes necessary to expand the facility or build a new building. This results in problems such as increased installation costs and the postponement of the introduction of a power generation system.

[0008] An object of the present disclosure is to provide a power generation system that can reduce installation costs. [Means for solving the problem]

[0009] A first aspect of the present disclosure is a power generation system (1) including a fluid machine (12), a generator (13), and equipment (14, 15). The fluid machine (12) is connected to a first pipe (11) and is rotationally driven by a fluid (F) flowing through the first pipe (11). The generator (13) is rotationally driven by the fluid machine (12). The fluid machine (12) and the generator (13) are arranged inside a machine room (P). The equipment (14, 15) is provided in the first pipe (11). A portion of the first pipe (11) where the equipment (14, 15) is provided is arranged inside a second pipe (16) having open end faces (16ae1, 16be1) inside the machine room (P).

[0010] In the first aspect, the devices (14, 15) that are part of the power generation system (1) are arranged inside the second pipe (16), i.e., the existing pipe, which has open end faces (16ae1, 16be1) inside the machine room (P). This allows the power generation system (1) to be installed without expanding the existing machine room (P), thereby reducing installation costs.

[0011] A second aspect of the present disclosure is a first aspect of the present disclosure, wherein the first pipe (11) in the first aspect has a first end (11ae1, 11be1) connected to the fluid machine (12) and a second end (11ae2, 11be2) opposite the first end (11ae1, 11be1), and the second end (11ae2, 11be2) is connected via a fitting (17) to a third pipe (18) having an inner diameter approximately the same as the inner diameter of the second pipe (16).

[0012] In the second embodiment, the first pipe (11), through which the fluid (F) required for power generation flows, can be passed through the second pipe (16) and connected to the third pipe (18), which is an existing pipe.

[0013] A third aspect of the present disclosure is the first or second aspect, further comprising a controller (21) that controls the generator (13), and the devices (14, 15) have transmitting / receiving means (23, 24) that receive signals from the controller (21) or transmit signals to the controller (21).

[0014] In the third embodiment, the controller (21) can control the generator (13) based on signals transmitted to and received from the devices (14, 15).

[0015] A fourth aspect of the present disclosure is the third aspect, wherein the device (14, 15) includes a measuring instrument (14) that measures a physical quantity of the fluid (F) and transmits the measurement result to the controller (21).

[0016] In a fourth embodiment, the controller (21) can control the generator (13) based on, for example, a measurement of the flow rate of the fluid (F).

[0017] A fifth aspect of the present disclosure is the third or fourth aspect, wherein the device (14, 15) includes a valve (15) that adjusts a physical quantity of the fluid (F) in response to a signal received from the controller (21).

[0018] In a fifth embodiment, the controller (21) can control the generator (13), for example, by adjusting the flow rate of the fluid (F).

[0019] A sixth aspect of the present disclosure is any one of the third to fifth aspects, wherein the transmitting / receiving means (23, 24) includes a signal line (22) connecting the controller (21) and the device (14, 15), and the signal line (22) is arranged inside the second pipe (16) and is drawn out from the opening end face (16ae1, 16be1) to the outside of the second pipe (16).

[0020] In the sixth aspect, when providing the signal line (22) connecting the controller (21) and the devices (14, 15), there is no need to provide a hole in the second pipe (16) for passing the signal line (22), thereby reducing installation costs.

[0021] A seventh aspect of the present disclosure is any one of the first to sixth aspects, further comprising a controller (21) that controls the generator (13), and the devices (14, 15) are connected to a power line (25) that supplies electric power, and the power line (25) is arranged inside the second pipe (16) and is drawn out from the open end faces (16ae1, 16be1) to the outside of the second pipe (16).

[0022] In the seventh aspect, when providing the power line (25) connecting the controller (21) and the devices (14, 15), there is no need to provide a hole in the second pipe (16) for passing the power line (25), which reduces the installation cost.

[0023] An eighth aspect of the present disclosure is any one of the first to seventh aspects, wherein the fluid (F) is water, the fluid machine (12) is a water turbine, and the generator (13) generates hydroelectric power.

[0024] In the eighth aspect, for example, a hydroelectric power generation system can be installed at low cost by utilizing existing waterworks facilities. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a power generation system according to an embodiment. [Figure 2] FIG. 2 is a diagram showing the waterworks facility before the power generation system is installed, together with the power generation system to be installed. [Figure 3] FIG. 3 is a diagram showing the state in which the power generation system shown in FIG. 2 is installed in a water supply facility using a conventional construction method. DETAILED DESCRIPTION OF THE INVENTION

[0026] Embodiments of the present disclosure will be described below with reference to the drawings. The following embodiments are essentially preferred examples and are not intended to limit the scope of the present invention, its applications, or its uses. In the following embodiments, an example is given in which the technology of the present disclosure is applied to an inline water turbine and a hydroelectric power generation system including the same. However, the technology of the present disclosure is not limited to hydroelectric power generation and can also be applied to fluids other than water (e.g., gas, oil, etc.) and fluid machines other than water turbines. Note that, although the same reference numerals represent the same components in the drawings, dimensions in the drawings, such as length, width, thickness, and depth, have been appropriately changed from the actual scale for clarity and simplification of the drawings and may not correspond to the actual relative dimensions.

[0027] <Power generation system> The power generation system 1 shown in Fig. 1 is applied to, for example, a water supply system. Water flowing through the power generation system 1 is supplied to houses, buildings, water reservoirs, etc. The power generation system 1 recovers the head energy of the water as electricity.

[0028] The power generation system (1) mainly includes a first pipe (11), a fluid machine (12), a generator (13), and a controller (21). A fluid (F) flows through the first pipe (11). In this example, the fluid (F) is water (F). The fluid machine (12) is connected to the first pipe (11) and is rotationally driven by the water (F) flowing through the first pipe (11). The generator (13) is rotationally driven by the fluid machine (12) to generate hydroelectric power. The controller (21) controls the generator (13) via a signal line (22).

[0029] The fluid machine (12) in this example is a water turbine (12). The water turbine (12) is disposed midway along the first pipe (11). The first pipe (11) has a first upstream portion (11a) located upstream of the water turbine (12) and a first downstream portion (11b) located downstream of the water turbine (12). A flange may be provided between the water turbine (12) and the first pipe (11) to adjust the pipe diameter to the diameter of the water turbine (12), for example.

[0030] The water turbine (12) converts the energy of the water (F) into rotational energy. The water turbine (12) has a casing, an impeller housed in the casing, and a rotating shaft fixed to the center of the impeller (not shown). When the water turbine (12) is rotated by the water flowing through the first pipe (11), the rotating shaft is rotated. The generator (13) is connected to the water turbine (12) via the rotating shaft. The generator (13) has a rotor and a stator (not shown). The rotor is of the permanent magnet embedded type. The stator has a coil.

[0031] When the water turbine (12) rotates, the water turbine (12) drives the generator (13). As a result, the generator (13) performs regenerative operation. During rotation, the generator (13) generates electric power. The electric power generated by the generator (13) is supplied to the power line (25) via the controller (21). The power line (25) is, for example, a power line of a commercial power source.

[0032] The water turbine 12 and the generator 13 are disposed inside a machine room P. In this example, the machine room P is a pit P, which is an existing water supply facility. The pit P is a space through which underground water supply pipes pass, and the water supply pipes outside the pit P are buried underground. The controller 21 may be disposed outside the pit P or may be disposed inside the pit P.

[0033] The power generation system (1) of this example includes, in addition to the water turbine (12), devices (14, 15) provided in the first pipe (11). The devices (14, 15) have transmitting / receiving means (23, 24) for receiving signals from the controller (21) or transmitting signals to the controller. The transmitting / receiving means (23, 24) includes a signal line (22) connecting the controller (21) and the devices (14, 15). The devices (14, 15) are connected to a power line (25) through which power is supplied from the controller (21). The devices (14, 15) may be supplied with power from a power supply system via the power line (25).

[0034] The devices (14, 15) may be, for example, a measuring device (14) that measures a physical quantity of the water (F) and transmits the measurement result to a controller (21), and a valve (15) that adjusts the physical quantity of the water (F) in response to a signal received from the controller (21). The measuring device (14) and the valve (15) are each disposed in series with the water turbine (12) in the first pipe (11).

[0035] The measuring instrument 14 in this example is a flow meter 14 that measures the flow rate of the water F flowing through the first downstream portion 11b of the first pipe 11. The flow rate measured by the flow meter 14 is transmitted from a transmitter 23 of the flow meter 14 to the controller 21 via a signal line 22. It is preferable that the flow meter 14 does not obstruct the flow of the water F.

[0036] The valve (15) in this example is a water control valve (15) that adjusts the flow rate of water (F) flowing through the first upstream portion (11a) of the first pipe (11). The water control valve (15) is, for example, an electric valve whose opening is adjusted by a motor. A control signal transmitted from the controller (21) via a signal line (22) is received by a receiving device (24) of the water control valve (15), and the water control valve (15) adjusts the flow rate of water (F) flowing into the water turbine (12) based on the received control signal.

[0037] The controller (21) receives the flow rate measurement value of the flow meter (14) and, based on the received flow rate measurement value, transmits a control signal to the water control valve (15) to adjust the flow rate of the water (F) flowing into the water turbine (12). This allows the control of the rotational drive of the water turbine (12), and therefore the controller (21) can control the amount of power generated by the generator (13).

[0038] In the power generation system (1) of this embodiment, as shown in Fig. 1, a portion of the first pipe (11) where the devices (14, 15) are provided is disposed inside a second pipe (16) having open end faces (16ae1, 16be1) inside the pit (P). As will be described later, the second pipe (16) is a reused water supply pipe that existed before the power generation system (1) was installed. The water turbine (12) and the generator (13) are disposed outside the second pipe (16) inside the pit (P).

[0039] The second pipe (16) has a second upstream section (16a) in which a water control valve (15) provided in the first upstream section (11a) of the first pipe (11) is disposed, and a second downstream section (16b) in which a flow meter (14) provided in the first downstream section (11b) of the first pipe (11) is disposed.

[0040] The second upstream portion 16a and the second downstream portion 16b of the second pipe 16 each penetrate the wall of the pit P. The second upstream portion 16a of the second pipe 16 has a first upstream open end face 16ae1 inside the pit P and a second upstream open end face 16ae2 outside the pit P. The second downstream portion 16b of the second pipe 16 has a first downstream open end face 16be1 inside the pit P and a second downstream open end face 16be2 outside the pit P.

[0041] The first upstream section 11a of the first pipe 11 has a first upstream end section 11ae1 connected to the water turbine 12 and a second upstream end section 11ae2 opposite the first upstream end section 11ae1. The second upstream end section 11ae2 of the first upstream section 11a of the first pipe 11 is connected via a first joint 17a to a third upstream section 18a of a third pipe 18, which has an inner diameter substantially the same as the inner diameter of the second pipe 16, outside the second upstream section 16a of the second pipe 16. The first joint 17a may extend from the inside of the second upstream section 16a of the second pipe 16 through the second upstream open end face 16ae2 to the outside of the second upstream section 16a. A first gate valve (19a) for stopping the flow of water (F) may be disposed between the first joint (17a) and the third upstream portion (18a) of the third pipe (18).

[0042] The first downstream section 11b of the first pipe 11 has a first downstream end section 11be1 connected to the water turbine 12 and a second downstream end section 11be2 opposite the first downstream end section 11be1. The second downstream end section 11be2 of the first downstream section 11b of the first pipe 11 is connected via a second joint 17b to a third downstream section 18b of a third pipe 18, the third pipe 18 having an inner diameter substantially the same as the inner diameter of the second pipe 16, outside the second downstream section 16b of the second pipe 16. The second joint 17b may extend from the inside of the second downstream section 16b of the second pipe 16 through the second downstream open end face 16be2 to the outside of the second downstream section 16b. A second gate valve (19b) for stopping the flow of water (F) may be disposed between the second joint (17a) and the third upstream portion (18b) of the third pipe (18).

[0043] The joints 17 (the first joint 17a and the second joint 17a) may be flanges that can connect pipes of different diameters. The third pipe 18 may be a water supply pipe before the power generation system 1 is installed, as will be described later. The gate valves 19 (the first gate valve 19a and the second gate valve 19b) may be disposed inside a manhole that is an existing water supply facility. This allows workers to easily access the gate valves 19 and close them to stop the flow of water F when installing or adjusting the power generation system 1.

[0044] Inside the second upstream portion (16a) of the second pipe (16), the signal line (22) and the power line (25) connected to the water control valve (15) are drawn from inside the second upstream portion (16a) through the first upstream opening end face (16ae1) to the outside of the second upstream portion (16a) (inside the pit (P)).

[0045] Inside the second downstream portion (16b) of the second pipe (16), the signal line (22) and the power line (25) connected to the flow meter (14) are drawn from inside the second downstream portion (16b) through the first downstream opening end face (16be1) to the outside of the second downstream portion (16b) (inside the pit (P)).

[0046] <Installation of power generation system> The water supply facility shown in FIG. 2 mainly includes a pit (P), a water control pipe (31) in which a water control valve (34) is installed, and a main pipe (32) connected to the water control pipe (31). Water (F) flows through the water control pipe (31) and the main pipe (32). The portion of the water control pipe (31) in which the water control valve (34) is installed is located inside the pit (P). The water control valve (34) is located midway along the water control pipe (31). The water control pipe (31) has an upstream water control pipe (31a) located upstream of the water control valve (34) and a downstream water control pipe (31b) located downstream of the water control valve (34). The upstream water control pipe (31a) penetrates the wall of the pit (P) and is connected to an upstream portion (32a) of the main pipe (32) outside the pit (P) via an upstream gate valve (33a). The downstream water control pipe (31b) penetrates the wall of the pit (P) and is connected to the downstream section (32b) of the main pipe (32) via the downstream gate valve (33b) outside the pit (P). The gate valves (33) (the upstream gate valve (33a) and the downstream gate valve (33b)) may be disposed inside the manhole.

[0047] The power generation system (50) shown in FIG. 2 includes a power generation pipe (51) and a water turbine (52) provided in the power generation pipe (51). The generator, controller, and other components of the power generation system (50) are not shown. The water turbine (52) is disposed midway along the power generation pipe (51). The power generation pipe (51) includes an upstream power generation pipe (51a) located upstream of the water turbine (52) and a downstream power generation pipe (51b) located downstream of the water turbine (52). A flow meter (54) for measuring the flow rate of water (F) is provided in the downstream power generation pipe (51b). A water control valve (55) for adjusting the flow rate of water (F) is provided in the upstream power generation pipe (51a).

[0048] When installing a power generation system (50) in the water supply facility shown in Figure 2, if the dimension of the power generation system (50) in the pipeline direction is larger than the dimension of the pit (P) in the pipeline direction, conventional construction methods have required work to expand the dimension of the pit (P) in the pipeline direction.

[0049] In the conventional construction method, as shown in Fig. 3, in order to place the entire power generation system (50) inside the pit (P), the existing pit (P) shown in Fig. 2 is extended in the pipeline direction to the vicinity of the gate valve (33), and the entire water control pipe (31) including the water control valve (34) is removed and replaced with the power generation system (50). The upstream power generation pipe (51a) of the power generation system (50) is connected to the upstream section (32a) of the main pipe (32) (upstream gate valve (33a)) via an upstream joint (57a). The downstream power generation pipe (51b) of the power generation system (50) is connected to the downstream section (32b) of the main pipe (32) (downstream gate valve (33b)) via a downstream joint (57b).

[0050] In contrast, in the power generation system (1) shown in FIG. 1, the portion of the first pipe (11) connected to the water turbine (12), where the devices (14, 15) (the flow meter (14) and the water control valve (15)) are provided, is disposed inside the second pipe (16), which has open end faces (16ae1, 16be1) inside the pit (P). The second pipe (16) is a partial remnant of the water control piping (31) shown in FIG. 2. Therefore, even if the lateral dimensions of the power generation system (1) are larger than those of the pit (P), the power generation system (1) can be installed without expanding the lateral dimensions of the pit (P). When installing a power generation system while leaving the existing pipe, a waterworks construction method known as an in-existing pipe installation method may be used. The in-existing pipe laying method is a construction method in which, when replacing an existing pipe with a smaller diameter pipe, part of the existing pipe is left as a sheath pipe and a new pipe is laid inside the sheath pipe.

[0051] <Features of the embodiment> As described above, the power generation system (1) of this embodiment includes the water turbine (12), the generator (13), and the devices (14, 15). The water turbine (12) is connected to the first pipe (11) and is rotationally driven by the water (F) flowing through the first pipe (11). The generator (13) is rotationally driven by the water turbine (12). The water turbine (12) and the generator (13) are arranged inside the pit (P). The devices (14, 15) are provided in the first pipe (11). The portion of the first pipe (11) where the devices (14, 15) are provided is arranged inside the second pipe (16) having open end faces (16ae1, 16be1) inside the pit (P).

[0052] In the power generation system (1) of this embodiment, the devices (14, 15) that are part of the power generation system (1) are disposed inside the second pipe (16) having open end faces (16ae1, 16be1) inside the pit (P), i.e., inside the existing pipe. This allows the power generation system (1) to be installed without expanding the existing pit (P), thereby reducing installation costs. This allows for an increase in the number of power generation systems (1) that can be installed.

[0053] In the power generation system 1 of this embodiment, the first pipe 11 has a first end portion 11ae1, 11be1 connected to the water turbine 12 and a second end portion 11ae2, 11be2 opposite the first end portion 11ae1, 11be1. The second end portion 11ae2, 11be2 may be connected to a third pipe 18 having an inner diameter substantially the same as that of the second pipe 16 via a joint 17. This allows the first pipe 11, through which water F required for power generation flows, to be connected to the third pipe 18, which is an existing pipe, via the second pipe 16.

[0054] The power generation system (1) of this embodiment includes a controller (21) that controls the generator (13), and the devices (14, 15) may include transmitting / receiving means (23, 24) that receive signals from the controller (21) or transmit signals to the controller (21). This allows the controller (21) to control the generator (13) based on signals transmitted to and received from the devices (14, 15).

[0055] In the power generation system (1) of this embodiment, the devices (14, 15) may include a flow meter (14) that measures the flow rate of the water (F) and transmits the measurement result to the controller (21). This allows the controller (21) to control the generator (13) based on the measurement result of the flow rate of the water (F).

[0056] In the power generation system (1) of this embodiment, the devices (14, 15) may include a valve (15) that adjusts the flow rate of the water (F) in response to a signal received from the controller (21). This allows the controller (21) to control the generator (13) by adjusting the flow rate of the water (F).

[0057] In the power generation system (1) of the present embodiment, the transmitting / receiving means (23, 24) may include a signal line (22) connecting the controller (21) and the devices (14, 15), and the signal line (22) may be disposed inside the second pipe (16) and led out from the open end faces (16ae1, 16be1) to the outside of the second pipe (16). In this way, when providing the signal line (22) connecting the controller (21) and the devices (14, 15), it is not necessary to provide a hole in the second pipe (16) for passing the signal line (22), thereby reducing installation costs.

[0058] The power generation system (1) of this embodiment includes a controller (21) that controls the generator (13), and the devices (14, 15) are connected to power lines (25) that receive power from the controller (21) or a power supply system. The power lines (25) may be arranged inside the second pipe (16) and led out of the second pipe (16) through the open end faces (16ae1, 16be1). In this way, when providing the power lines (25) that connect the controller (21) and the devices (14, 15), there is no need to provide holes in the second pipe (16) for passing the power lines (25), thereby reducing installation costs.

[0059] (Other embodiments) In the above-described embodiment, the power generation system (1) is applied to a water supply system. However, the present invention is not limited thereto. The power generation system (1) may be applied to other flow path facilities, such as sewers, industrial water systems, rivers, discharges, and agricultural water systems. The power generation system (1) may be operated by a fluid (F) other than water (F). That is, the power generation system (1) may generate power other than hydroelectric power, and the power generation system (1) may include a fluid machine (12) other than a water turbine (12). While the power generation system (1) is installed in a pit (P), which is an underground space through which water supply piping passes, the machine room (P) in which the power generation system (1) is installed may be another facility, such as an above-ground building, and the machine room (P) may have a structure in which a portion of the ceiling or wall is open. In addition, in the power generation system (1), the flow meter (14) and the water control valve (15) have been described as examples of the devices (14, 15) provided in the first pipe (11) to which the fluid machine (12) is connected. However, the types of the devices (14, 15) are not particularly limited. For example, instead of the flow meter (14), a measuring instrument (14) that measures another physical quantity of the fluid (F) and transmits the measurement result to the controller (21) may be provided. Alternatively, instead of the water control valve (15), a valve (15) that adjusts another physical quantity of the fluid (F) in response to a signal received from the controller (21) may be provided.

[0060] Although the embodiments have been described above, various modifications of form and details are possible, such as appropriate combinations and substitutions. Furthermore, the terms "first," "second," "third," etc. in the specification and claims are used to distinguish between the terms to which these terms are attached, and do not limit the number or order of the terms. [Industrial Applicability]

[0061] As described above, the present disclosure is useful for power generation systems. [Explanation of symbols]

[0062] 1. Power generation system 11 1st tube 11ae1,11be1 1st end 11ae2,11be2 2nd end 12 Fluid machinery (water wheel) 13. Generator 14 Equipment (measuring instruments) 15 Equipment (valves) 16 2nd pipe 16ae1,16be1 Open end surface 17 Joints 18 3rd tube 21 Controller 22 Signal line 23 Transmission and reception means (transmission device) 24 Transmission and reception means (receiving device) 25 Power Lines F fluid (water) P Machine room (pit)

Claims

1. a fluid machine (12) connected to the first pipe (11), rotated and driven by a fluid (F) flowing through the first pipe (11), and disposed inside a machine chamber (P); a generator (13) that is rotationally driven by the fluid machine (12) and is disposed inside the machine room (P); a device (14, 15) provided in the first pipe (11); In a power generation system (1) comprising: a portion of the first pipe (11) in which the equipment (14, 15) is provided is disposed inside a second pipe (16) having an open end surface (16ae1, 16be1) inside the machine room (P); Power generation system.

2. 2. The power generation system of claim 1, the first pipe (11) has a first end (11ae1, 11be1) connected to the fluid machine (12) and a second end (11ae2, 11be2) opposite to the first end (11ae1, 11be1); The second end (11ae2, 11be2) is connected to a third pipe (18) having an inner diameter substantially the same as the inner diameter of the second pipe (16) via a joint (17). Power generation system.

3. 2. The power generation system of claim 1, a controller (21) that controls the generator (13), The devices (14, 15) have transmitting / receiving means (23, 24) for receiving signals from the controller (21) or transmitting signals to the controller (21). Power generation system.

4. The power generation system of claim 3, The devices (14, 15) include a measuring instrument (14) that measures a physical quantity of the fluid (F) and transmits the measurement result to the controller (21). Power generation system.

5. The power generation system of claim 3, The device (14, 15) includes a valve (15) that adjusts a physical quantity of the fluid (F) in response to a signal received from the controller (21). Power generation system.

6. The power generation system of claim 3, The transmitting / receiving means (23, 24) includes a signal line (22) connecting the controller (21) and the device (14, 15), the signal line (22) is disposed inside the second pipe (16) and is drawn out from the opening end faces (16ae1, 16be1) to the outside of the second pipe (16); Power generation system.

7. 2. The power generation system of claim 1, a controller (21) that controls the generator (13), The devices (14, 15) are connected to a power line (25) through which power is supplied; the power line (25) is disposed inside the second pipe (16) and is drawn out from the open end faces (16ae1, 16be1) to the outside of the second pipe (16); Power generation system.

8. The power generation system according to any one of claims 1 to 7, The fluid (F) is water, the fluid machine (12) is a water turbine; The generator (13) generates hydroelectric power. Power generation system.

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