Solar power generation equipment

Abstract

A solar thermal power generation device with improved power generation efficiency is provided. [Solution] The solar thermal power generation device comprises a pipeline, a concentrating mirror unit which heats and expands the air in the pipeline, a first chamber and a second chamber connected to the pipeline to which the air is sent, a switching valve capable of switching between an A1 state in which the pipeline and the first chamber are connected and an A2 state in which the pipeline and the second chamber are connected, an output shaft, a generator which generates electricity by rotating the output shaft, first and second turbine units which, when the rotational speed of the air rotating in the rotational direction is greater than the rotational speed of the output shaft, cause the output shaft to rotate together with a ratchet mechanism and transmit the rotational force to the output shaft, and which, when the rotational speed is slower than the rotational speed of the output shaft, cause the output shaft to spin freely with the ratchet mechanism, and a control unit which alternately switches the switching valve.

Description

[Technical field]

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

[0002] A solar pressure power generation system is known (see Patent Document 1). In this method, the temperature of gas or gas and liquid sealed in a pressure vessel is increased by sunlight, and the pressure inside the pressure vessel is increased by their expansion. The energy of this pressure is converted into electrical energy by a turbine generator. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 6-43273 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0004] However, in Patent Document 1, it is not clear how this pressure energy is converted into electrical energy by a turbine generator, and therefore the power generation efficiency is unclear, leaving room for improvement in power generation efficiency. SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a solar thermal power generation device with improved power generation efficiency. [Means for solving the problem]

[0005] The above problems are solved by the present invention. That is, the solar thermal power generation device of the present invention (1) is A pipe for sending air in a sending direction; a light collecting mirror unit provided around the pipeline at a midpoint of the pipeline, the light collecting mirror unit collecting sunlight to heat the pipeline and heat and expand the air in the pipeline; a first chamber and a second chamber connected to the pipeline to which the air is delivered; a switching valve that is provided in the pipeline downstream of the collecting mirror unit in the feed direction and is capable of switching between an A1 state in which the pipeline and the first chamber are connected and an A2 state in which the pipeline and the second chamber are connected; an output shaft that is rotatably disposed across the first chamber and the second chamber; A generator that generates electricity by rotation of the output shaft; a first turbine unit including a first ratchet mechanism and rotatably provided around the output shaft in the first chamber, the first turbine unit causing the output shaft to rotate together with the first ratchet mechanism when a rotation speed of the output shaft rotated in a rotational direction by the air is higher than a rotation speed of the output shaft, and transmitting the rotational force to the output shaft, and causing the output shaft to rotate freely by the first ratchet mechanism when the rotation speed is lower than the rotation speed of the output shaft; a second turbine section including a second ratchet mechanism and rotatably provided around the output shaft in the second chamber, the second turbine section causing the output shaft to rotate together with the second ratchet mechanism when a rotation speed of the output shaft rotated in a rotational direction by the air is higher than a rotation speed of the output shaft, and transmitting the rotational force to the output shaft, and causing the output shaft to rotate freely by the second ratchet mechanism when the rotation speed is lower than the rotation speed of the output shaft; A control unit that alternately switches the switching valve between the A1 state and the A2 state; Equipped with.

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

[0007] The solar thermal power generation device of the present invention (3) is the solar thermal power generation device according to (2), a first atmosphere release valve provided in the first chamber and opening the first chamber to the atmosphere; a second atmosphere release valve provided in the second chamber and opening the first chamber to the atmosphere; Equipped with The control unit opens the first atmosphere release valve at a timing when the rotation speed of the first turbine section becomes slower than the rotation speed of the output shaft to open the first chamber to the atmosphere, and opens the second atmosphere release valve at a timing when the rotation speed of the second turbine section becomes slower than the rotation speed of the output shaft to open the second chamber to the atmosphere.

[0008] The solar thermal power generation device of the present invention (4) is the solar thermal power generation device according to (3), A flywheel attached to the output shaft; a third chamber that houses the flywheel and is maintained in a vacuum state; a clutch unit capable of connecting a rotational force of the output shaft to the generator and disconnecting the rotational force of the output shaft from the generator; Equipped with. Effect of the Invention

[0009] According to the present invention, it is possible to provide a solar thermal power generation device with improved power generation efficiency. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing a solar thermal power generation device according to an embodiment. [Diagram 2]FIG. 2 is a schematic side view showing the first turbine body of the solar thermal power generation device shown in FIG. 1, and the first claw portion and first engagement surface of the first ratchet mechanism, illustrating the state in which the first claw portion (output shaft) is rotating freely relative to the first engagement surface (first turbine body). [Diagram 3] FIG. 2 is a schematic side view showing the first turbine body of the solar thermal power generation device shown in FIG. 1, and the first claw portion and first engagement surface of the first ratchet mechanism, illustrating the state in which the first claw portion (output shaft) rotates relative to the first engagement surface (first turbine body). [Figure 4] FIG. 2 is a schematic diagram showing a step of creating a negative pressure in the first chamber in the first cycle in the solar thermal power generation device shown in FIG. [Diagram 5] FIG. 2 is a schematic diagram showing a process in which expanded air is supplied to a first chamber to rotate a first turbine section in a first cycle in the solar thermal power generation device shown in FIG. 1. [Figure 6] FIG. 2 is a schematic diagram showing a step of discharging air from a first chamber in a first cycle and a step of creating a negative pressure in the second chamber in a second cycle in the solar thermal power generation device shown in FIG. 1. [Figure 7] FIG. 2 is a schematic diagram showing, in the solar thermal power generation device shown in FIG. 1, the process of supplying expanded air to the second chamber to rotate the second turbine section in the second cycle, and the process of creating negative pressure in the first chamber in the first cycle. [Figure 8] FIG. 2 is a schematic diagram showing a step of discharging air from the second chamber in the second cycle and a step of creating a negative pressure in the first chamber in the first cycle in the solar thermal power generation device shown in FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The solar thermal power generation device 11 will now be described with reference to the drawings. The solar thermal power generation device 11 is a device that can generate power efficiently for a long period of time in high temperature regions such as deserts.

[0012] As shown in FIG. 1, a solar thermal power generation system 11 includes a main unit 12 and a binary power generator 13 provided in tandem with the main unit 12.

[0013] A known binary generator can be used for the binary generator 13. For example, the binary generator 13 has a binary power generation pipeline 15 filled with a working fluid and passing through the light collecting mirror section 14, a turbine 16 provided in the middle of the binary power generation pipeline 15, and a second generator 17 that generates power by rotating the turbine 16. Examples of the working fluid filled in the binary power generation pipeline 15 include ammonia water, pentane, and alternative fluorocarbons. The binary generator 13 can evaporate the working fluid in the light collecting mirror section 14, rotate the turbine with the vapor of the working fluid, and generate power in the second generator 17. The length of the binary power generation pipeline 15 in the light collecting mirror section 14 may be formed to be the same length as the air expander 54 of the main device 12 described later. The power generated in the second generator 17 is transformed through a transformer 18 and used.

[0014] The main device 12 of the solar thermal power generation device 11 includes a compressor 21, a pipeline 22 that sends air in a sending direction S by the compressor 21 and branches into two near the downstream end, a switching valve 23 that is provided in the middle of the pipeline 22 and switches the connection state, a light collecting mirror unit 14 that is provided in the middle of the pipeline 22, a first chamber 24 that is provided at the downstream end of the pipeline 22, a second chamber 25 that is provided at the downstream end of the pipeline 22 adjacent to the first chamber 24, a third chamber 26 that is 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 unit 31 that is fixed to the output shaft 27 in the first chamber 24, a second turbine unit 32 that is fixed to the output shaft 27 in the second chamber 25, a flywheel 33 that is fixed to the output shaft 27 in the third chamber 26, and a first turbine unit 32 that is fixed to the output shaft 27 in the first chamber 24. and a vacuum pump 34 for making the second chamber 25 negative pressure relative to atmospheric pressure, a second pipe 35 connected at one end to the vacuum pump 34 and branching at the other end to be connected to the first chamber 24 and the second chamber 25, a second switching valve 36 provided midway through the second pipe 35 for switching the connection state, a first atmosphere release valve 41 provided in the first chamber 24, a second atmosphere release valve 42 provided in the second chamber 25, a generator 43 connected to the output shaft 27, a transformer 18 that transforms the power generated by the generator 43, a control unit 44 that controls the opening and closing of the switching valve 23, the second switching valve 36, the first atmosphere release valve 41, and the second atmosphere release valve 42, the generator 43 that generates power using the 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 may have a structure of a known compressor. The compressor 21 has a rotary shaft 47 rotated by a driving force from a driving source 46, an impeller 48 for sending compressed air in a sending direction S, a reduction gear train 50 for transmitting the rotational force of the rotary shaft 47 to the impeller 48, and a second flywheel 51 provided on the rotary shaft 47. The driving source 46 is, for example, a known solar heat Stirling engine. The first solar heat Stirling engine constituting the driving source 46 may have a lens 52 for collecting sunlight, a heat accumulator 53 for storing heat by the light collected by the lens 52, and the like.

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

[0017] The light collecting mirror section 14 has a plurality of mirrors arranged so as to surround the periphery of the duct 22. In FIG. 1, a part of the duct 22 passing through the light collecting mirror section 14 is depicted as a straight pipe, but in reality, the duct may be installed over a long distance by repeatedly meandering. A part of the duct 22 passing through the light collecting mirror section 14 constitutes an air expander 54, for example, the outer circumferential surface of which is painted black, and the air expander 54 is easily adapted to absorb light from sunlight as thermal energy and to thermally expand the air located inside the air expander 54. The length of the light collecting mirror section 14 and the air expander 54 may be 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 shape as each other, and are formed as sealed 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 volume smaller than the first chamber 24 and the second chamber 25. In order to reduce the air resistance of the flywheel 33, the third chamber 26 is preferably maintained in a vacuum state using a vacuum pump (not shown) or the like.

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

[0021] The vacuum pump 34 may have a structure of a known vacuum pump. The vacuum pump 34 has a second rotating shaft 57 rotated by a driving force from the second driving source 56, a second impeller 58 for sucking air from the first chamber 24 and the second chamber 25, a second reduction gear train 61 for transmitting 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 driving source 56 is, for example, a known solar heat Stirling engine. The second solar heat Stirling engine constituting the second driving source 56 may have a lens for collecting sunlight and a heat accumulator for storing heat by the light collected by the lens. In addition, the lens and the heat accumulator of the second solar heat Stirling engine constituting the second driving source 56 may be common to the lens 52 and the heat accumulator 53 of the solar heat Stirling engine constituting the driving source 46.

[0022] The second switching valve 36 is configured by an electromagnetic valve. The second switching valve 36 can switch between a B1 state in which the second pipe 35 (vacuum pump 34) and the first chamber 24 communicate with each other and a B2 state in which the second pipe 35 (vacuum pump 34) and the second chamber 25 communicate with each other.

[0023] The first atmosphere release valve 41 and the second atmosphere release valve 42 are each configured as an electromagnetic valve. The first atmosphere 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 and a state in which the first chamber 24 is sealed. The second atmosphere 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 and a state in which the second chamber 25 is sealed.

[0024] The generator 43 is configured by a known generator. Also, a known one can be adopted for the clutch unit 45. 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 configured with a general computer, and also includes various drivers that directly drive each valve configured with solenoid valves.

[0025] The first turbine section 31 has a first turbine body 63 constituting an impeller, and a first ratchet mechanism 64 provided inside the first turbine body 63. The shape of the impeller of the first turbine body 63 is a general one. As shown in FIG. 2, the first ratchet mechanism 64 has a first claw portion 65 attached to the output shaft 27, and a first locking surface 66 formed in an annular shape so as to have a plurality of protrusions protruding inwardly 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 a fixed shaft of a holder member 65A attached to the output shaft 27.

[0026] As shown in FIG. 1, the second turbine section 32 has a second turbine body 71 constituting an impeller and a second ratchet mechanism 72 provided inside the second turbine body 71. The shape of the impeller of the second turbine body 71 is a general one. The structure of the second ratchet mechanism 72 is configured similarly to the structure of the first ratchet mechanism 64, so that the details are not illustrated. That is, the second ratchet mechanism 72 has a second claw portion 73 attached to the output shaft 27 and a second locking surface 74 formed in an annular shape so as to have a plurality of protrusions protruding inwardly on the inner peripheral surface of the second turbine body 71 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 shaft of the holder member attached to the output shaft 27.

[0027] As shown in FIG. 3, when the first turbine body 63 rotates and the rotation speed of the first turbine body 63 becomes higher than the rotation speed of the output shaft 27, the first claw portion 65 of the first turbine section 31 is locked to the first locking surface 66. In this state, the output shaft 27 rotates together with the rotation of the first turbine section 31, so that the rotational force of the first turbine section 31 can be transmitted to the output shaft 27. On the other hand, as shown in FIG. 2, when the rotation speed of the first turbine body 63 decreases and becomes lower than the rotation 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 despite the decrease in speed of the first turbine body 63.

[0028] The second turbine section 32 operates in a similar manner. That is, when the second turbine body 71 rotates and the rotation speed of the second turbine body 71 becomes higher than the rotation speed of the output shaft 27, the second claw portion 73 of the second turbine section 32 is locked to the second locking surface 74. In this state, the output shaft 27 rotates together with the rotation of the second turbine section 32, so that the rotational force of the second turbine section 32 can be transmitted to the output shaft 27. On the other hand, when the rotation speed of the second turbine body 71 decreases and becomes lower than the rotation speed of the output shaft 27, the second claw portion 73 rotates freely against the second locking surface 74. As a result, the output shaft 27 can continue to rotate despite the decrease in 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, a first cycle consisting of evacuation of the first chamber 24, supply of air into the first chamber 24 (transmission of rotational force to the output shaft 27), and exhaust from the first chamber 24, and a second cycle consisting of evacuation of the second chamber 25, supply of air into the second chamber 25 (transmission of rotational force to the output shaft 27), and exhaust from the second chamber 25 are alternately repeated, whereby power can be continuously generated by the generator 43.

[0030] As shown in FIG. 1, when sunlight is irradiated onto a lens 52 shared by a solar-heat Stirling engine as the driving source 46 of the compressor 21 and a solar-heat Stirling engine as the second driving source 56 of the vacuum pump 34, the heat of the sunlight rotates and drives the driving source 46 and the second driving source 56. The rotation of the driving source 46 is stabilized by a second flywheel 51 and transmitted to a rotating shaft 47 and an impeller 48 via a first reduction gear train 50. The rotation of the impeller 48 allows air (compressed air) to be sent in the sending direction S (downstream direction) of the duct 22. The air sent through the duct 22 by the action of the compressor 21 receives heat from sunlight and is expanded in the light collecting mirror section 14 and the air expander 54 inside the light collecting mirror section 14. At this time, the temperature of the air passing through the air expander 54, which is several tens of meters to several tens of kilometers, reaches a maximum of 200 to 300°C.

[0031] On the other hand, before the air heated in the air expander 54 is supplied to the first chamber 24 and the second chamber 25, the vacuum pump 34 creates a negative pressure in the first chamber 24 and the second chamber 25. The second impeller 58 rotates by the rotation of the second drive source 56, and starts suction (vacuum drawing) to the second pipe 35. Then, as shown in Fig. 4, the control unit 44 controls the second switching valve 36 to create a B1 state in which the vacuum pump 34 and the first chamber 24 are in communication with each other, and to create a state in which the vacuum pump 34 and the second chamber 25 are separated from each other. This starts the first cycle.

[0032] When the vacuum pump 34 is sucked for a predetermined time and the first chamber 24 is brought to a certain negative pressure, the control unit 44 controls the second switching valve 36 as shown in FIG. 5 to separate the vacuum pump 34 from the first chamber 24 and to a state B2 in which the vacuum pump 34 communicates with the second chamber 25. At the same time, the control unit 44 controls the switching valve 23 to switch from a state in which the upstream side of the pipe 22 communicates with the second chamber 25 to a state A1 in which the upstream side of the pipe 22 communicates with the first chamber 24. As a result, air that has been heated to a high temperature and expanded in the air expander 54 is forcefully supplied into the first chamber 24. In this way, the air is forcefully ejected from the pipe 22 into the first chamber 24, causing the first turbine body 63 of the first turbine unit 31 to rotate. At this time, as shown in Fig. 3, the first claws 65 engaged with the first locking surfaces 66 rotate together with the first turbine body 63, 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 the rotation becomes stable. The rotation of the output shaft 27 is transmitted to the generator 43, and electricity is generated in the generator 43. 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 duct 22, the momentum of the air flowing from the duct 22 into the first chamber 24 decreases, and the rotation speed of the first turbine body 63 decreases. On the other hand, the rotation speed of the output shaft 27 is kept constant to a certain extent by the action of the flywheel 33, so that the rotation speed of the output shaft 27 becomes faster than the rotation speed of the first turbine body 63. At this time, as shown in FIG. 2, the first claw portion 65 does not engage with the first engagement surface 66 on the inner surface of the first turbine body 63, and moves in a sliding manner on the first engagement surface 66. Therefore, the output shaft 27 rotates freely relative to the first turbine body 63 whose rotation speed has decreased, and the rotation speed of the output shaft 27 is maintained.

[0034] The control unit 44 controls the first atmosphere 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 Fig. 6. This causes excess air accumulated in the first chamber 24 to be discharged to the outside world. This completes the first cycle.

[0035] 5, the second cycle is started in the second chamber 25 while air expanded at a high temperature in the air expander 54 is being supplied to the first chamber 24 from the pipe 22, and the control unit 44 controls the second switching valve 36 to create a B2 state in which the vacuum pump 34 and the second chamber 25 are in communication with each other. As a result, the inside of the second chamber 25 is sucked (evacuated), creating a certain degree of negative pressure in the second chamber 25.

[0036] 7, the control unit 44 controls the second switching valve 36 to change the state from B2 in which the vacuum pump 34 and the second chamber 25 communicate with each other to B1 in which the vacuum pump 34 and the first chamber 24 communicate with each other. At the same time, the control unit 44 controls the switching valve 23 to change the state from A1 in which the upstream side of the pipe 22 communicates with the first chamber 24 to A2 in which the upstream side of the pipe 22 communicates with the second chamber 25.

[0037] As a result, air that has been heated to a high temperature and expanded in the air expander 54 is forcefully supplied into the second chamber 25. In this manner, the air is forcefully ejected from the pipe 22 into the second chamber 25, causing 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 FIG. 3, the second claw portion 73 engaged with the second engagement surface 74 rotates together with the second turbine body 71, 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 the rotation is stabilized. The rotation of the output shaft 27 is transmitted to the generator 43, and electricity is generated in the generator 43. 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 duct 22, the momentum of the air flowing from the duct 22 into the second chamber 25 decreases, and the rotation speed of the second turbine body 71 decreases. On the other hand, the rotation speed of the output shaft 27 is kept constant to a certain extent by the action of the flywheel 33, so that the rotation speed of the output shaft 27 becomes faster than the rotation speed of the second turbine body 71. At this time, similar to the state of the first turbine section 31 shown in FIG. 2, the second claw portion 73 does not engage with the second engagement surface 74 on the inner surface of the second turbine body 71, and moves so as to slide on the second engagement surface 74. Therefore, the output shaft 27 rotates freely relative to the second turbine body 71 whose rotation speed has decreased, and the rotation speed of the output shaft 27 is maintained.

[0039] The control unit 44 controls the second atmosphere release valve 42 to move the second chamber 25 from a sealed state to a state in which the second chamber 25 communicates with the outside world, as shown in Fig. 8. This causes the excess air accumulated in the second chamber 25 to be discharged to the outside world. This ends the second cycle.

[0040] 7, the first cycle is started in the first chamber 24 while air expanded at a high temperature in the air expander 54 is being supplied to the second chamber 25 through the pipe 22. In this manner, in the solar thermal power generation device of this embodiment, the first cycle and the second cycle are alternately performed, thereby enabling the generator 43 to generate electricity continuously.

[0041] Furthermore, as necessary, the control unit 44 can 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 rotating shaft of the generator 43, and a state in which the output shaft 27 and the rotating shaft of the generator 43 are separated. In the state in which the output shaft 27 and the generator 43 are separated, rotational force is stored on the output shaft 27 side, which can also be used as a battery.

[0042] According to this embodiment, the following can be said. The solar thermal power generation device 11 includes a duct 22 for sending air in a sending direction S, a collector mirror section 14 provided around the duct 22 at a position midway along the duct 22, the collector mirror section 14 collecting sunlight to heat the duct 22 and heat and expand the air in the duct 22, a first chamber 24 and a second chamber 25 connected to the duct 22 to which the air is sent, and a collector mirror section 14 provided in the duct 22 downstream of the collector mirror section 14 in the sending direction S and connecting the duct 22 and the first chamber 24 and the second chamber 25. a switching valve 23 that can switch between an A1 state in which the pipe 24 is connected to the first chamber 24 and an A2 state in which the pipe 22 and the second chamber 25 are connected; an output shaft 27 that is rotatably disposed across the first chamber 24 and the second chamber 25; a generator 43 that generates electricity by the rotation of the output shaft 27; a first turbine section 31 that includes a first ratchet mechanism 64 and is rotatably disposed around the output shaft 27 in the first chamber 24, and a rotor that rotates in a rotational direction by the air. a first turbine section 31 which causes the output shaft 27 to rotate together with the first ratchet mechanism 64 when the rotation speed is higher than the rotation speed of the output shaft 27, and transmits the rotational force to the output shaft 27 by the first ratchet mechanism 64 when the rotation speed is lower than the rotation speed of the output shaft 27, and causes the output shaft 27 to rotate freely by the first ratchet mechanism 64 when the rotation speed is lower than the rotation speed of the output shaft 27; a second turbine section 32 which includes a second ratchet mechanism 72 and is rotatably provided around the output shaft 27 within the second chamber 25, the second turbine section 32 which causes the output shaft 27 to rotate together with the second ratchet mechanism 72 when the rotation speed rotated in the rotational direction by the air is higher than the rotation speed of the output shaft 27, and transmits the rotational force to the output shaft 27 by the second ratchet mechanism 72 when the rotation speed is lower than the rotation speed of the output shaft 27, and causes the output shaft 27 to rotate freely by the second ratchet mechanism 72; and a control section 44 which alternately switches the switching valve 23 between the A1 state and the A2 state.

[0043] According to this configuration, the torque obtained in first turbine section 31 and second turbine section 32 can be stably transmitted to output shaft 27 without reducing the torque of output shaft 27 by the action of first ratchet mechanism 64 and second ratchet mechanism 72. This allows generator 43 to generate electricity stably.

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

[0045] According to this configuration, since the first chamber 24 and the second chamber 25 are brought into a negative pressure before air is supplied, the force of the air flow supplied to the first chamber 24 and the second chamber 25 can be further strengthened.

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

[0047] According to this configuration, when the first chamber 24 and the second chamber 25 become high pressure due to the supply of air flow from the pipe 22, the first chamber 24 and the second chamber 25 can be lowered to about atmospheric pressure before the next vacuum state is created. This reduces the burden on the vacuum pump 34 and ensures the long-term reliability of the solar thermal power generation device 11. In addition, it is possible to create a negative pressure in the first chamber 24 and the second chamber 25 in a short time, further improving the 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 section 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] According to this configuration, the flywheel 33 can stabilize the rotation speed of the output shaft 27. In addition, since the third chamber 26 is maintained in a vacuum state, the loss of rotation due to air friction can be minimized. In addition, since the clutch unit 45 can switch the connection state, the output shaft 27 can be used like a battery that stores rotational force by storing rotational force in the output shaft 27 while the output shaft 27 is separated from the generator 43. The user can resume power generation by operating the clutch unit 45 to connect the output shaft 27 and the generator 43 as necessary. The above embodiment is merely an example, and can be modified as appropriate without departing from the spirit and scope of the invention. [Explanation of symbols]

[0050] 11 Solar power generation equipment 12 Main device 13 Binary Generator 14 Condenser mirror 18 Transformers 21 Compressor S Feed direction 22 Conduit 22A 1st branch 22B 2nd branch 23 Switching valve 24 Room 1 25 Room 2 26 Room 3 27 Output shaft 31 First Turbine Section 32 No. 2 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 Generator 44 Control section 45 Clutch section 46 Power Source 52 Lens 53 Heat storage 54 Air expansion device 55 Bearing 65 1st claw part 66 First locking surface 71 No. 2 turbine body 72 Second ratchet mechanism 73 2nd claw part 74 Second locking surface

Claims

1. A pipe for sending air in a sending direction; a light collecting mirror unit provided around the pipeline at a midpoint of the pipeline, the light collecting mirror unit collecting sunlight to heat the pipeline and heat and expand the air in the pipeline; a first chamber and a second chamber connected to the pipeline to which the air is delivered; a switching valve that is provided in the pipeline downstream of the collecting mirror unit in the feed direction and is capable of switching between an A1 state in which the pipeline and the first chamber are connected and an A2 state in which the pipeline and the second chamber are connected; an output shaft that is rotatably disposed across the first chamber and the second chamber; A generator that generates electricity by rotation of the output shaft; a first turbine unit including a first ratchet mechanism and rotatably provided around the output shaft in the first chamber, the first turbine unit causing the output shaft to rotate together with the first ratchet mechanism when a rotation speed of the output shaft rotated in a rotational direction by the air is higher than a rotation speed of the output shaft, and transmitting the rotational force to the output shaft, and causing the output shaft to rotate freely by the first ratchet mechanism when the rotation speed is lower than the rotation speed of the output shaft; a second turbine section including a second ratchet mechanism and rotatably provided around the output shaft in the second chamber, the second turbine section causing the output shaft to rotate together with the second ratchet mechanism when a rotation speed of the output shaft rotated in a rotational direction by the air is higher than a rotation speed of the output shaft, and transmitting the rotational force to the output shaft, and causing the output shaft to rotate freely by the second ratchet mechanism when the rotation speed is lower than the rotation speed of the output shaft; A control unit that alternately switches the switching valve between the A1 state and the A2 state; A solar thermal power generation device comprising:

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

3. a first atmosphere release valve provided in the first chamber and opening the first chamber to the atmosphere; a second atmosphere release valve provided in the second chamber and opening the first chamber to the atmosphere; Equipped with The solar thermal power generation device of claim 2, wherein the control unit opens the first atmosphere release valve at a timing when the rotation speed of the first turbine section becomes slower than the rotation speed of the output shaft to open the first chamber to the atmosphere, and opens the second atmosphere release valve at a timing when the rotation speed of the second turbine section becomes slower than the rotation speed of the output shaft to open the second chamber to the atmosphere.

4. A flywheel attached to the output shaft; a third chamber that houses the flywheel and is maintained in a vacuum state; a clutch unit capable of connecting a rotational force of the output shaft to the generator and disconnecting the rotational force of the output shaft from the generator; The solar thermal power generation device according to claim 3 .

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