Solar thermal power generation system

Abstract

To provide a solar thermal power generation system with improved power generation efficiency. [Solution] The solar thermal power generation device comprises a pipeline, a concentrating mirror section that heats and expands the air in the pipeline, a first chamber and a second chamber connected to the pipeline through which the air is supplied, a switching valve capable of switching between state A1, in which the pipeline and the first chamber are connected, and state A2, in which the pipeline and the second chamber are connected, an output shaft, a generator that generates electricity by the rotation of the output shaft, a first turbine section and a second turbine section that, when the rotational speed of the air rotating in the rotational direction is greater than the rotational speed of the output shaft, are rotated together by a ratchet mechanism and the rotational force is transmitted to the output shaft, and when the rotational speed is less than the rotational speed of the output shaft, the ratchet mechanism causes the output shaft to spin freely, and a control section that alternately switches the switching valve.

Description

Technical Field

[0001] The present invention relates to a solar thermal power generation device that generates electricity using solar heat.

Background Art

[0002] Solar thermal pressure power generation devices are known (see Patent Document 1). In this method, sunlight is used to raise the temperature of a gas or a gas-liquid mixture enclosed in a pressure vessel, and the pressure inside the pressure vessel is increased by the expansion of these substances. The energy of this pressure is converted into electrical energy by a turbine generator.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Disclosure of the Invention

Problems to be Solved by the Invention

[0004] By the way, in Patent Document 1, it is not clear how the energy of this pressure is specifically extracted as electrical energy by a turbine generator. Therefore, the power generation efficiency is unclear, and there is room for improvement in improving the power generation efficiency. Therefore, an object of the present invention is to provide a solar thermal power generation device with improved power generation efficiency.

Means for Solving the Problems

[0005] The above problems are solved by the following present invention. That is, the solar thermal power generation device of the present invention (1) includes a pipeline for sending air in a sending direction, a condensing mirror unit provided around the pipeline at a position in the middle of the pipeline, which condenses sunlight to heat the pipeline and heats and expands the air in the pipeline, a first chamber and a second chamber connected to the pipeline through which the air is sent, A switching valve is provided in the pipeline downstream of the light-gathering mirror section with respect to the aforementioned feeding direction, and is capable of switching between state A1, in which the pipeline and the first chamber are connected, and state A2, in which the pipeline and the second chamber are connected. An output shaft is positioned across the first chamber and the second chamber and is rotatably mounted, A generator that generates electricity by the rotation of the output shaft, A first turbine section, including a first ratchet mechanism, is rotatably mounted within the first chamber around the output shaft, wherein when the rotational speed of the first turbine section, which is rotated in the rotational direction by the air, is greater than the rotational speed of the output shaft, the first ratchet mechanism causes the first turbine section to rotate together with the output shaft and transmits the rotational force to the output shaft, and when the rotational speed is less than the rotational speed of the output shaft, the first ratchet mechanism causes the output shaft to rotate freely. A second turbine section, including a second ratchet mechanism, is rotatably mounted within the second chamber around the output shaft, wherein when the rotational speed of the turbine section, which is rotated in the rotational direction by the air, is greater than the rotational speed of the output shaft, the second ratchet mechanism causes the turbine section to rotate together with the output shaft, thereby transmitting the rotational force to the output shaft, and when the rotational speed is less than the rotational speed of the output shaft, the second ratchet mechanism causes the output shaft to rotate freely. A control unit that alternately switches the aforementioned switching valve between state A1 and state A2, It is equipped with.

[0006] Furthermore, the solar thermal power generation device of the present invention (2) is the solar thermal power generation device described in (1), A vacuum pump capable of creating a negative pressure in the first chamber and the second chamber, A second conduit connecting the vacuum pump and the first and second chambers, A second switching valve capable of switching between state B1, in which the second pipeline and the first chamber are connected, and state B2, in which the second pipeline and the second chamber are connected, Equipped with, The control unit sets the second switching valve to state B1 to create negative pressure in the first chamber before supplying the air to the first chamber, and sets the second switching valve to state B2 to create negative pressure in the second chamber before supplying the air to the second chamber.

[0007] Furthermore, the solar thermal power generation device of the present invention (3) is the solar thermal power generation device described in (2), A first atmospheric release valve is provided in the first chamber and opens the first chamber to the atmosphere, A second atmospheric release valve is provided in the second chamber and opens the first chamber to the atmosphere, Equipped with, The control unit opens the first atmospheric release valve to release the first chamber to the atmosphere when the rotational speed of the first turbine section becomes less than the rotational speed of the output shaft, and opens the second atmospheric release valve to release the second chamber to the atmosphere when the rotational speed of the second turbine section becomes less than the rotational speed of the output shaft.

[0008] Furthermore, the solar thermal power generation device of the present invention (4) is the solar thermal power generation device described in (3), A flywheel attached to the output shaft, A third chamber housing the aforementioned flywheel and maintained in a vacuum, A clutch unit capable of connecting the rotational force of the output shaft to the generator or separating the rotational force of the output shaft from the generator, It is equipped with. [Effects of the Invention]

[0009] According to the present invention, a solar thermal power generation device with improved power generation efficiency can be provided. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic diagram showing a solar thermal power generation system according to an embodiment. [Figure 2]Fig. 1 shows the first turbine main body of the solar thermal power generation device, the first claw portion and the first locking surface of the first ratchet mechanism, and is a schematic side view showing a state in which the first claw portion (output shaft) rotates freely with respect to the first locking surface (first turbine main body). [Figure 3] Fig. 1 shows the first turbine main body of the solar thermal power generation device, the first claw portion and the first locking surface of the first ratchet mechanism, and is a schematic side view showing a state in which the first claw portion (output shaft) rotates together with respect to the first locking surface (first turbine main body). [Figure 4] In the solar thermal power generation device shown in Fig. 1, in the first cycle, it is a schematic diagram showing the step of making the first chamber into a negative pressure. [Figure 5] In the solar thermal power generation device shown in Fig. 1, in the first cycle, it is a schematic diagram showing the step of supplying the expanded air to the first chamber and rotating the first turbine section. [Figure 6] In the solar thermal power generation device shown in Fig. 1, in the first cycle, it is a schematic diagram showing the step of exhausting air from the first chamber, and in the second cycle, the step of making the second chamber into a negative pressure. [Figure 7] In the solar thermal power generation device shown in Fig. 1, in the second cycle, it is a schematic diagram showing the step of supplying the expanded air to the second chamber and rotating the second turbine section, and in the first cycle, the step of making the first chamber into a negative pressure. [Figure 8] In the solar thermal power generation device shown in Fig. 1, in the second cycle, it is a schematic diagram showing the step of exhausting air from the second chamber, and in the first cycle, the step of making the first chamber into a negative pressure.

Embodiments for Carrying Out the Invention

[0011] The solar thermal power generation device 11 will be described below with reference to the drawings. The solar thermal power generation device 11 is a device that can generate electricity efficiently for a long time in a high-temperature area such as a desert, for example.

[0012] As shown in Fig. 1, the solar thermal power generation device 11 includes a main device 12 and a binary generator 13 provided in parallel with the main device 12.

[0013] The binary power generator 13 can use a known binary power generator. For example, the binary power generator 13 has a binary power generation pipeline 15 filled with working fluid and passing through a concentrating mirror section 14, a turbine 16 installed in the middle of the binary power generation pipeline 15, and a second generator 17 that generates electricity by the rotation of the turbine 16. Examples of working fluids that can be filled into the binary power generation pipeline 15 include ammonia water, pentane, and alternative fluorocarbons. The binary power generator 13 can generate electricity in the second generator 17 by evaporating the working fluid in the concentrating mirror section 14 and rotating the turbine with the vapor of this working fluid. The length of the binary power generation pipeline 15 in the concentrating mirror section 14 may be the same length as the air expander 54 of the main unit 12, which will be described later. The electricity generated by the second generator 17 is transformed through a transformer 18 and used.

[0014] The main unit 12 of the solar thermal power generation device 11 includes a compressor 21, a pipeline 22 that sends air in the direction S by the compressor 21 and branches into two near the downstream end, a switching valve 23 provided in the middle of the pipeline 22 for switching the connection state, a concentrating mirror section 14 provided in the middle of the pipeline 22, a first chamber 24 provided at the downstream end of the pipeline 22, a second chamber 25 provided at the downstream end of the pipeline 22 adjacent to the first chamber 24, a third chamber 26 adjacent to the second chamber 25, an output shaft 27 that penetrates the first chamber 24, the second chamber 25 and the third chamber 26, a first turbine section 31 fixed to the output shaft 27 in the first chamber 24, a second turbine section 32 fixed to the output shaft 27 in the second chamber 25, a flywheel 33 fixed to the output shaft 27 in the third chamber 26, and the first chamber 24 The system also includes a vacuum pump 34 for creating a negative pressure in the second chamber 25 relative to atmospheric pressure, a second pipeline 35 connected to the vacuum pump 34 at one end and branched at the other end to connect to the first chamber 24 and the second chamber 25, a second switching valve 36 provided in the middle of the second pipeline 35 for switching the connection state, a first atmospheric release valve 41 provided in the first chamber 24, a second atmospheric release valve 42 provided in the second chamber 25, a generator 43 connected to the output shaft 27, a transformer 18 for transforming the power generated by the generator 43, a control unit 44 for controlling the opening and closing of the switching valve 23, the second switching valve 36, the first atmospheric release valve 41, and the second atmospheric release valve 42, a generator 43 that generates power using rotational force transmitted from the output shaft 27, and a clutch unit 45 interposed between the generator 43 and the output shaft 27.

[0015] The compressor 21 can use the structure of a known compressor. The compressor 21 has a rotating shaft 47 that is rotated by a driving force from a drive source 46, an impeller 48 for sending compressed air in the supply direction S, a reduction gear train 50 that transmits the rotational force of the rotating shaft 47 to the impeller 48, and a second flywheel 51 provided on the rotating shaft 47. The drive source 46 is, for example, a known solar Stirling engine. The first solar Stirling engine that constitutes the drive source 46 may have a lens 52 that concentrates sunlight, a heat accumulator 53 that stores heat from the light collected by the lens 52, and so on.

[0016] The pipeline 22 includes a first branch 22A and a second branch 22B, which branch off near the downstream end. The first branch 22A is connected to the first chamber 24. The second branch 22B is connected to the second chamber 25. The switching valve 23 is a solenoid valve and can switch between state A1, in which the upstream side of the pipeline 22 is in communication with the first branch 22A (first chamber 24), and state A2, in which the upstream side of the pipeline 22 is in communication with the second branch 22B (second chamber 25).

[0017] The light-gathering mirror section 14 has multiple mirrors arranged to surround the conduit 22. In Figure 1, a portion of the conduit 22 passing through the light-gathering mirror section 14 is depicted as a straight pipe, but in reality, it may be installed over a long distance by repeatedly meandering. A portion of the conduit 22 passing through the light-gathering mirror section 14 constitutes an air expander 54, for example, whose outer surface is painted black. This air expander 54 easily absorbs light from sunlight as thermal energy, and the air located inside the air expander 54 is easily thermally expanded. The length of the light-gathering mirror section 14 and the air expander 54 may range from several tens of meters to several tens of kilometers.

[0018] The first chamber 24 and the second chamber 25 are formed in substantially the same manner and are enclosed chambers. The volume of the second chamber 25 is the same as the volume of the first chamber 24.

[0019] The third chamber 26 has a smaller volume than the first chamber 24 and the second chamber 25. The third chamber 26 is preferably maintained under vacuum using a vacuum pump (not shown) or the like to reduce the air resistance of the flywheel 33.

[0020] The output shaft 27 is rotatably supported by the walls constituting the first chamber 24, the second chamber 25, and the third chamber 26. Bearings 55 or the like may be interposed between the output shaft 27 and each wall as needed. The flywheel 33 is composed of a known flywheel.

[0021] The vacuum pump 34 can use the structure of a known vacuum pump. The vacuum pump 34 has a second rotating shaft 57 that is rotated by a driving force from a second drive source 56, a second impeller 58 for drawing air from the first chamber 24 and the second chamber 25, a second reduction gear train 61 that transmits the rotational force of the second rotating shaft 57 to the second impeller 58, and a third flywheel 62 provided on the rotating shaft 47. The second drive source 56 is, for example, a known solar Stirling engine. The second solar Stirling engine constituting the second drive source 56 may have a lens for concentrating sunlight and a heat accumulator for storing heat from the light collected by the lens. Also, the lens and heat accumulator of the second solar Stirling engine constituting the second drive source 56 may be common with the lens 52 and heat accumulator 53 of the solar Stirling engine constituting the drive source 46.

[0022] The second switching valve 36 is composed of a solenoid valve. The second switching valve 36 can switch between state B1, in which the second pipeline 35 (vacuum pump 34) and the first chamber 24 are in communication, and state B2, in which the second pipeline 35 (vacuum pump 34) and the second chamber 25 are in communication.

[0023] The first atmospheric release valve 41 and the second atmospheric release valve 42 are each composed of solenoid valves. The first atmospheric release valve 41 can be opened and closed to switch between a state in which the first chamber 24 is in communication with the outside world and a state in which the first chamber 24 is sealed. The second atmospheric release valve 42 can be opened and closed to switch between a state in which the second chamber 25 is in communication with the outside world and a state in which the second chamber 25 is sealed.

[0024] The generator 43 is composed of a known generator. The clutch unit 45 can also be a known one. The clutch unit 45 can switch between a state in which the output shaft 27 and the rotating shaft of the generator 43 are connected and a state in which the output shaft 27 and the rotating shaft of the generator 43 are separated. The control unit 44 is composed of a general-purpose computer and includes various drivers that directly drive each valve, which is composed of solenoid valves.

[0025] The first turbine section 31 includes a first turbine body 63 that constitutes an impeller, and a first ratchet mechanism 64 provided inside the first turbine body 63. The impeller shape of the first turbine body 63 is a general type. As shown in Figure 2, the first ratchet mechanism 64 includes a first claw portion 65 attached to the output shaft 27, and a first locking surface 66 formed in an annular shape with a plurality of projections that protrude inward on the inner circumferential surface of the first turbine body 63 so as to be able to lock the first claw portion 65. The first claw portion 65 is biased to rotate outward by the action of a spring (not shown) interposed around the fixed axis of a holder member 65A attached to the output shaft 27.

[0026] As shown in Figure 1, the second turbine section 32 includes a second turbine body 71 that constitutes an impeller, and a second ratchet mechanism 72 provided inside the second turbine body 71. The impeller shape of the second turbine body 71 is of a general type. The structure of the second ratchet mechanism 72 is configured similarly to that of the first ratchet mechanism 64, so its details are not shown. Specifically, the second ratchet mechanism 72 includes a second claw portion 73 attached to the output shaft 27, and a second locking surface 74 formed in an annular shape on the inner circumferential surface of the second turbine body 71, having a plurality of projections that protrude inward so as to be able to lock the second claw portion 73. The second claw portion 73 is biased outward by the action of a spring (not shown) interposed around the fixed axis of a holder member attached to the output shaft 27.

[0027] As shown in Figure 3, the first turbine section 31 engages with the first locking surface 66 when the first turbine body 63 rotates and its rotational speed exceeds the rotational speed of the output shaft 27. In this state, the output shaft 27 rotates in conjunction with the rotation of the first turbine section 31, transmitting the rotational force of the first turbine section 31 to the output shaft 27. On the other hand, as shown in Figure 2, when the rotational speed of the first turbine body 63 decreases and falls below the rotational speed of the output shaft 27, the first claw portion 65 rotates freely against the first locking surface 66. This allows the output shaft 27 to continue rotating regardless of the decrease in the speed of the first turbine body 63.

[0028] The operation of the second turbine section 32 is similar. Specifically, when the second turbine body 71 rotates and the rotational speed of the second turbine body 71 becomes higher than the rotational speed of the output shaft 27, the second claw portion 73 is locked against the second locking surface 74. In this state, the output shaft 27 rotates along with the rotation of the second turbine section 32, and the rotational force of the second turbine section 32 can be transmitted to the output shaft 27. On the other hand, when the rotational speed of the second turbine body 71 decreases and becomes lower than the rotational speed of the output shaft 27, the second claw portion 73 rotates freely against the second locking surface 74. This allows the output shaft 27 to continue rotating regardless of the decrease in the speed of the second turbine body 71.

[0029] Next, the operation of the solar thermal power generation device 11 of this embodiment will be described with reference to Figures 1 to 8. In the solar thermal power generation device 11 of this embodiment, power generation can be continuously performed by the generator 43 by alternately repeating a first cycle consisting of vacuuming the first chamber 24, supplying air into the first chamber 24 (transmission of rotational force to the output shaft 27), and exhausting from the first chamber 24, and a second cycle consisting of vacuuming the second chamber 25, supplying air into the second chamber 25 (transmission of rotational force to the output shaft 27), and exhausting from the second chamber 25.

[0030] As shown in Figure 1, when sunlight shines on the lens 52, which is shared by the solar Stirling engine that is the drive source 46 for the compressor 21 and the solar Stirling engine that is the second drive source 56 for the vacuum pump 34, the heat causes the drive source 46 and the second drive source 56 to rotate. The rotation of the drive source 46 is stabilized by the second flywheel 51 and transmitted to the rotating shaft 47 and impeller 48 via the first reduction gear train 50. The rotation of the impeller 48 allows air (compressed air) to be sent in the flow direction S (downstream direction) of the pipeline 22. The air sent through the pipeline 22 by the action of the compressor 21 receives heat from sunlight and expands in the concentrating mirror section 14 and the air expander 54 inside it. At this time, the temperature of the air passing through the air expander 54, which extends from several tens of meters to several tens of kilometers, reaches a maximum of 200 to 300°C.

[0031] Meanwhile, prior to supplying the high-temperature air in the air expander 54 to the first chamber 24 and the second chamber 25, the vacuum pump 34 creates negative pressure in the first chamber 24 and the second chamber 25. The rotation of the second drive source 56 causes the second impeller 58 to rotate, initiating suction (vacuuming) into the second pipeline 35. Then, as shown in Figure 4, the control unit 44 controls the second switching valve 36 to create state B1, where the vacuum pump 34 and the first chamber 24 are in communication, and separate the vacuum pump 34 from the second chamber 25. This initiates the first cycle.

[0032] After a predetermined time has been performed by the vacuum pump 34 to create a certain level of negative pressure in the first chamber 24, the control unit 44 controls the second switching valve 36, as shown in Figure 5, to separate the vacuum pump 34 from the first chamber 24 and connect the vacuum pump 34 to the second chamber 25, creating state B2. At the same time, the control unit 44 controls the switching valve 23 to switch from a state where the upstream side of the pipeline 22 is connected to the second chamber 25 to state A1 where the upstream side of the pipeline 22 is connected to the first chamber 24. As a result, the air that has been heated and expanded in the air expander 54 is forcefully supplied into the first chamber 24. In this way, the forceful injection of air from the pipeline 22 into the first chamber 24 causes the first turbine body 63 of the first turbine section 31 to rotate. At this time, as shown in Figure 3, the first claw portion 65, which is engaged with the first locking surface 66 together with the first turbine body 63, rotates with it, and the rotational force of the first turbine body 63 is transmitted to the output shaft 27. The rotation of the output shaft 27 rotates the flywheel 33, and its rotation is stabilized. The rotation of the output shaft 27 is transmitted to the generator 43, where electricity is generated. The electricity generated by the generator 43 is transformed by the transformer 18 and used.

[0033] When the first chamber 24 is filled to a certain extent with air supplied from the conduit 22, the force of the airflow from the conduit 22 into the first chamber 24 decreases, and the rotational speed of the first turbine body 63 decreases. On the other hand, the rotational speed of the output shaft 27 is kept relatively constant by the action of the flywheel 33, so the rotational speed of the output shaft 27 becomes faster than the rotational speed of the first turbine body 63. At this time, as shown in Figure 2, the first claw portion 65 does not engage with the first locking surface 66 on the inner surface of the first turbine body 63, but slides along the first locking surface 66. As a result, the output shaft 27 spins freely relative to the first turbine body 63, whose rotational speed has decreased, and the rotational speed of the output shaft 27 is maintained.

[0034] The control unit 44 controls the first atmospheric release valve 41 to move the first chamber 24 from a sealed state to a state in which the first chamber 24 is in communication with the outside world, as shown in Figure 6. This discharges the excess air accumulated in the first chamber 24 to the outside world. This completes the first cycle.

[0035] Meanwhile, in the second chamber 25, as shown in Figure 5, the second cycle begins while the air that has been heated and expanded in the air expander 54 is being supplied to the first chamber 24 from the pipeline 22. The control unit 44 controls the second switching valve 36 to create state B2, in which the vacuum pump 34 and the second chamber 25 are in communication. As a result, the inside of the second chamber 25 is sucked (vacuumed), creating a certain level of negative pressure inside the second chamber 25.

[0036] Next, as shown in Figure 7, the control unit 44 controls the second switching valve 36 to change the state from state B2, in which the vacuum pump 34 and the second chamber 25 are in communication, to state B1, in which the vacuum pump 34 and the first chamber 24 are in communication. At the same time, the control unit 44 controls the switching valve 23 to switch from state A1, in which the upstream side of the pipeline 22 is in communication with the first chamber 24, to state A2, in which the upstream side of the pipeline 22 is in communication with the second chamber 25.

[0037] As a result, the air that has been heated and expanded in the air expander 54 is forcefully supplied into the second chamber 25. In this way, the forceful injection of air from the pipeline 22 into the second chamber 25 causes the second turbine body 71 of the second turbine section 32 to rotate. At this time, similar to the state of the first turbine section 31 shown in Figure 3, the second claw portion 73, which is engaged with the second locking surface 74 together with the second turbine body 71, rotates with it, and the rotational force of the second turbine body 71 is transmitted to the output shaft 27. The rotation of the output shaft 27 rotates the flywheel 33, and its rotation is stabilized. The rotation of the output shaft 27 is transmitted to the generator 43, where electricity is generated. The electricity generated by the generator 43 is transformed by the transformer 18 and used.

[0038] When the second chamber 25 is filled to a certain extent with air supplied from the conduit 22, the force of the airflow from the conduit 22 into the second chamber 25 decreases, and the rotational speed of the second turbine body 71 decreases. On the other hand, the rotational speed of the output shaft 27 is kept relatively constant by the action of the flywheel 33, so the rotational speed of the output shaft 27 becomes faster than the rotational speed of the second turbine body 71. At this time, similar to the state of the first turbine section 31 shown in Figure 2, the second claw section 73 does not engage with the second locking surface 74 on the inner surface of the second turbine body 71, but slides along the second locking surface 74. As a result, the output shaft 27 spins freely relative to the second turbine body 71, whose rotational speed has decreased, and the rotational speed of the output shaft 27 is maintained.

[0039] The control unit 44 controls the second atmospheric release valve 42 to move the second chamber 25 from a sealed state to a state in which the second chamber 25 is in communication with the outside world, as shown in Figure 8. This discharges the excess air accumulated in the second chamber 25 to the outside world. This completes the second cycle.

[0040] Meanwhile, in the first chamber 24, as shown in Figure 7, the first cycle begins while the air that has been heated and expanded in the air expander 54 is being supplied from the pipeline 22 to the second chamber 25. In this way, the solar thermal power generation system of this embodiment can generate electricity continuously in the generator 43 by alternating between the first and second cycles.

[0041] Furthermore, the control unit 44 can, as needed, control the clutch unit 45 to switch between a state in which the output shaft 27 and the generator 43 are connected and the rotation of the output shaft 27 is transmitted to the rotation shaft of the generator 43, and a state in which the output shaft 27 and the rotation shaft of the generator 43 are separated. When the output shaft 27 and the generator 43 are separated, rotational force is stored on the output shaft 27 side, which can be used as a battery.

[0042] According to this embodiment, the following can be said. The solar thermal power generation device 11 includes a conduit 22 for sending air in the sending direction S, a concentrating mirror section 14 provided around the conduit 22 at a position along the conduit 22, the concentrating mirror section 14 which collects sunlight to heat the conduit 22 and heats and expands the air inside the conduit 22, a first chamber 24 and a second chamber 25 connected to the conduit 22 through which the air is sent, and a concentrating mirror section provided in the conduit 22 downstream of the concentrating mirror section 14 with respect to the sending direction S, connecting the conduit 22 and the first chamber A switching valve 23 that can switch between state A1, in which 24 is connected, and state A2, in which the pipeline 22 and the second chamber 25 are connected; an output shaft 27 that is arranged across the first chamber 24 and the second chamber 25 and is rotatably mounted; a generator 43 that generates electricity by the rotation of the output shaft 27; and a first turbine section 31 that is rotatably mounted within the first chamber 24 around the output shaft 27 and includes a first ratchet mechanism 64, which rotates in the rotational direction due to the air. The first turbine section 31 is rotated by a first ratchet mechanism 64 when its speed is greater than the rotation speed of the output shaft 27, thereby transmitting its rotational force to the output shaft 27, and when its rotational speed is less than the rotation speed of the output shaft 27, the first ratchet mechanism 64 causes the output shaft 27 to spin freely. The second turbine section 32 includes a second ratchet mechanism 72 and is rotatable around the output shaft 27 within a second chamber 25. The second turbine section 32 is rotated by the second ratchet mechanism 72 when its rotational speed, which is driven by air in the direction of rotation, is greater than the rotation speed of the output shaft 27, thereby transmitting its rotational force to the output shaft 27, and when its rotational speed is less than the rotation speed of the output shaft 27, the second ratchet mechanism 72 causes the output shaft 27 to spin freely. The control unit 44 alternately switches the switching valve 23 between the A1 state and the A2 state.

[0043] With this configuration, the rotational force obtained from the first turbine section 31 and the second turbine section 32 can be stably transmitted to the output shaft 27 without reducing its rotational force through the action of the first ratchet mechanism 64 and the second ratchet mechanism 72. As a result, the generator 43 can generate electricity stably.

[0044] In this case, the solar thermal power generation device 11 includes a vacuum pump 34 capable of creating negative pressure in the first chamber 24 and the second chamber 25, a second conduit 35 connecting the vacuum pump 34 to the first chamber 24 and the second chamber 25, and a second switching valve 36 capable of switching between a B1 state in which the second conduit 35 is connected to the first chamber 24 and a B2 state in which the second conduit 35 is connected to the second chamber 25. The control unit 44 sets the second switching valve 36 to the B1 state to create negative pressure in the first chamber 24 before supplying the air into the first chamber 24, and sets the second switching valve 36 to the B2 state to create negative pressure in the second chamber 25 before supplying the air into the second chamber 25.

[0045] With this configuration, the first chamber 24 and the second chamber 25 become negatively pressurized before air is supplied, which allows the force of the airflow supplied to the first chamber 24 and the second chamber 25 to be further increased.

[0046] In this case, the solar thermal power generation device 11 includes a first atmospheric release valve 41 provided in the first chamber 24 and opening the first chamber 24 to the atmosphere, and a second atmospheric release valve 42 provided in the second chamber 25 and opening the first chamber 24 to the atmosphere. The control unit 44 opens the first atmospheric release valve 41 to open the first chamber 24 to the atmosphere when the rotational speed of the first turbine section 31 becomes less than the rotational speed of the output shaft 27, and opens the second atmospheric release valve 42 to open the second chamber 25 to the atmosphere when the rotational speed of the second turbine section 32 becomes less than the rotational speed of the output shaft 27.

[0047] With this configuration, when the supply of airflow from the pipeline 22 causes the first chamber 24 and the second chamber 25 to become high pressure, the pressure in the first chamber 24 and the second chamber 25 can be reduced to approximately atmospheric pressure before the next vacuum state is created. This reduces the load on the vacuum pump 34 and ensures the long-term reliability of the solar thermal power generation device 11. Furthermore, it enables the creation of negative pressure in the first chamber 24 and the second chamber 25 in a short time, further improving power generation efficiency.

[0048] In this case, the solar thermal power generation device 11 includes a flywheel 33 attached to the output shaft 27, a third chamber 26 that houses the flywheel 33 and is maintained in a vacuum state, and a clutch unit 45 that can connect the rotational force of the output shaft 27 to the generator 43 or disconnect the rotational force of the output shaft 27 from the generator 43.

[0049] With this configuration, the flywheel 33 can stabilize the rotational speed of the output shaft 27. In addition, since the third chamber 26 is maintained in a vacuum state, rotational losses due to air friction can be minimized. Furthermore, because the clutch unit 45 can switch the connection state, the output shaft 27 can be separated from the generator 43 and rotational force can be stored in the output shaft 27, allowing the output shaft 27 to be used like a battery that stores rotational force. The user can resume power generation by activating the clutch unit 45 to connect the output shaft 27 and the generator 43 as needed. The above embodiments are merely examples and can be modified as appropriate without altering the essence of the invention. [Explanation of Symbols]

[0050] 11. Solar thermal power generation system 12 Main device 13 Binary Generator 14. Light-gathering mirror section 18 Transformer 21 Compressor S feed direction 22 Conduit 22A First Branch 22B Second Branch 23 Switching valve 24 Room 1 25 Room 2 26 Room 3 27 Output shaft 31. First Turbine Section 32 Second Turbine Section 33 Flywheel 34 Vacuum pump 35 2nd pipeline 36. Second switching valve 41. First atmospheric release valve 42. Second atmospheric release valve 43 Generators 44 Control Unit 45 Clutch section 46 Power source 52 lenses 53 Heat storage 54 Air Inflator 55 Bearings 65 1st claw part 66 First locking surface 71. Second Turbine Body 72. Second ratchet mechanism 73 2nd claw part 74 Second locking surface

Claims

1. A conduit for sending air in the direction of the outflow, A light-gathering mirror section is provided at a location along the aforementioned conduit, around the conduit, which collects sunlight to heat the conduit and cause the air inside the conduit to heat and expand; A first chamber and a second chamber connected to the aforementioned pipeline through which the air is supplied, A switching valve is provided in the pipeline downstream of the light-gathering mirror section with respect to the aforementioned feeding direction, and is capable of switching between state A1, in which the pipeline and the first chamber are connected, and state A2, in which the pipeline and the second chamber are connected. An output shaft is positioned across the first chamber and the second chamber and is rotatably mounted, A generator that generates electricity by the rotation of the output shaft, A first turbine section, including a first ratchet mechanism, is rotatably mounted within the first chamber around the output shaft, wherein when the rotational speed of the turbine section, which is rotated in the rotational direction by the air, is greater than the rotational speed of the output shaft, the first ratchet mechanism causes the turbine section to rotate together with the output shaft, thereby transmitting the rotational force to the output shaft, and when the rotational speed is less than the rotational speed of the output shaft, the first ratchet mechanism causes the output shaft to rotate freely. A second turbine section, including a second ratchet mechanism, is rotatably mounted within the second chamber around the output shaft, wherein when the rotational speed of the turbine section, which is rotated in the rotational direction by the air, is greater than the rotational speed of the output shaft, the second ratchet mechanism causes the turbine section to rotate along with the output shaft, thereby transmitting the rotational force to the output shaft, and when the rotational speed is less than the rotational speed of the output shaft, the second ratchet mechanism causes the output shaft to rotate freely. A control unit that alternately switches the aforementioned switching valve between state A1 and state A2, A solar thermal power generation system equipped with [the following features].

2. A vacuum pump capable of creating a negative pressure in the first chamber and the second chamber, A second conduit connecting the vacuum pump with the first chamber and the second chamber, A second switching valve capable of switching between state B1, in which the second pipeline and the first chamber are connected, and state B2, in which the second pipeline and the second chamber are connected, Equipped with, The solar thermal power generation apparatus according to claim 1, wherein the control unit sets the second switching valve to state B1 to create negative pressure in the first chamber before supplying the air to the first chamber, and sets the second switching valve to state B2 to create negative pressure in the second chamber before supplying the air to the second chamber.

3. A first atmospheric release valve is provided in the first chamber and opens the first chamber to the atmosphere, A second atmospheric release valve is provided in the second chamber and opens the first chamber to the atmosphere, Equipped with, The solar thermal power generation apparatus according to claim 2, wherein the control unit opens the first atmospheric release valve to release the first chamber to the atmosphere when the rotational speed of the first turbine section becomes less than the rotational speed of the output shaft, and opens the second atmospheric release valve to release the second chamber to the atmosphere when the rotational speed of the second turbine section becomes less than the rotational speed of the output shaft.

4. A flywheel attached to the output shaft, A third chamber housing the flywheel and maintained in a vacuum, A clutch unit capable of connecting the rotational force of the output shaft to the generator or separating the rotational force of the output shaft from the generator, The solar thermal power generation apparatus according to claim 3, comprising:

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