A solar power generation energy storage power supply system

Abstract

The present invention relates to a solar power generation energy storage power supply system, comprising: a collector system, a power generation and tracking drive system, a heat storage system, and a heat exchange system. In the present invention, the air flow synchronously circulated and transported with the heat exchange medium is used to drive the transportation of the heat exchange medium, replacing the use of a circulation pump for medium transportation, reducing the medium resistance, and avoiding the problem of unreliable operation of the circulation pump under high-temperature conditions; for one or more groups of collector arrays, the same drive control device is used for tracking control. On the one hand, there is no need to separately support a complete tracking system for each group of collectors, which can greatly reduce the input cost brought by the tracking system; on the other hand, the power source of the tracking system is integrated into the power generation system, that is, while using a steam turbine to generate electricity, the light tracking can also be controlled, further reducing the equipment input.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic energy utilization, and in particular to a solar power generation energy storage power supply system. Background Art

[0002] Solar thermal power generation refers to using large-scale array parabolic or dish-shaped mirrors to collect solar thermal energy, providing steam through a heat exchange device, and combining with the process of a traditional steam turbine generator to achieve the purpose of power generation. Existing solar thermal energy storage power generation systems generally include a heat collection system, a heat exchange system, a heat storage system, a power generation system, and some other auxiliary equipment, etc. Among them, the currently common forms of the heat collection system include a dish-type collector system, a trough-type collector system, and a tower-type collector system. After the dish-type collector and the trough-type collector use multiple concentrating reflectors to collect heat, the heat exchange medium is heated and then transported into the heat exchange system, and steam is generated to drive the steam turbine to generate electricity.

[0003] Both the dish-type collector and the trough-type collector system require a very long pipeline system to enable the heat exchange medium to perform a heat exchange cycle, and a circulation pump is also needed to transport it inside the pipeline. Since the temperature of the heat exchange medium is very high after heating, for example, the working medium temperature of the trough-type collector in a medium-temperature system generally reaches above 400 °C, and the dish-type heat concentration will be even higher. This causes the circulation pump to operate in a high-temperature environment for a long time, and its service life will be seriously affected; on the other hand, since the energy concentration process depends on pipelines and pumps, and the heat exchange medium generally uses heat-conducting oil, the flow resistance of the working medium will increase greatly, and the heat loss is very large. Another factor affecting the energy conversion efficiency of the system is the light tracking of the concentrator. Generally, for large-scale photovoltaic thermal power stations, a concentrator with synchronous tracking can achieve single-axis tracking to meet the light tracking effect. However, currently, synchronous tracking uses a single-axis tracking detection and driving device installed on each group of concentrator systems. For large-scale solar thermal power stations, setting up thousands of concentrator matrices requires an equal number of tracking systems to be synchronized, which will greatly increase the investment cost of the collector system and instead reduce the advantages of the dish-type collector and the trough-type collector system in terms of easy installation and maintenance and low control cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a solar power generation energy storage power supply system to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A solar power generation energy storage power supply system, comprising: a collector system, a power generation and tracking drive system, a heat storage system, and a heat exchange system. The collector system includes a collector support, a collector, and a receiver. The collector is rotatably installed on the collector support, and the receiver is integrally connected to the collector. Two ends of the receiver are respectively connected to a medium outlet pipe and a medium inlet pipe. Both the medium outlet pipe and the medium inlet pipe are connected to the heat exchange system, and the heat exchange system is respectively connected to the power generation and tracking drive system and the heat storage system. One end of the medium inlet pipe close to the receiver is connected to a Venturi tube, and the end far from the receiver is connected to a medium valve. The medium valve and the Venturi tube are connected through a drive air duct. The other end of the Venturi tube is connected to the air inlet of a centrifugal fan through a return air duct, and the air outlet of the centrifugal fan is connected to the medium valve. The medium valve and the medium inlet pipe are connected through an inclined valve port. The inclined valve port is an air flow channel that is not 90° relative to the axis of the medium inlet pipe, and the included angle between the inclined valve port and the flow direction of the heat exchange medium is less than 90°. The cylindrical throat of the Venturi tube is communicated with the medium inlet pipe through an upper flow channel.

[0007] As a further solution of the present invention: a vertical flow channel communicated with the medium inlet pipe is arranged in the medium valve. The vertical flow channel is perpendicular to the axis of the medium inlet pipe, and an air outlet pipe is connected to the vertical flow channel. The air outlet pipe coincides with the axis of the medium inlet pipe.

[0008] As a further solution of the present invention: the included angle between the inclined valve port and the flow direction of the heat exchange medium is greater than 15°.

[0009] As a further solution of the present invention: a throttle port is arranged between the medium valve and the drive air duct. The throttle port is a flow channel with a diameter smaller than the inlet of the medium valve.

[0010] As a further solution of the present invention: the reversing gear mechanism is a set of meshing bevel gears. Square shaft holes are arranged at the centers of the bevel gears. Square shaft structures are arranged at the ends of the rotating shaft of the collector and the transmission rod.

[0011] As a further solution of the present invention: the centrifugal fan is connected to a lithium battery pack, and the lithium battery pack is connected to a photovoltaic panel.

[0012] As a further solution of the present invention: a transmission mechanism is arranged at the rotating connection of the collector and the collector support. The transmission mechanism includes a mounting seat and a reversing gear mechanism. The mounting seat is installed on the collector support. The reversing gear mechanism is respectively connected to the rotating shaft of the collector and the transmission rod. Two ends of the transmission rod are respectively connected between adjacent two groups of transmission mechanisms.

[0013] As a further solution of the present invention: a threaded sleeve for adjusting the length of the transmission rod is arranged on the transmission rod.

[0014] As a further solution of the present invention: The power generation and tracking drive system includes a speed reducer, an electric control clutch, a steam turbine, and a generator. The generator and the electric control clutch are respectively connected to both ends of the output shaft of the steam turbine. The input end of the speed reducer is connected to the electric control clutch, and the output end is connected to a transmission rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention uses the airflow that is synchronously circulated and transported with the heat exchange medium to drive the heat exchange medium, replacing the use of a circulation pump for medium transportation, reducing the medium resistance, and avoiding the problem of unreliable operation of the circulation pump under high-temperature conditions; For one or more groups of collector arrays, the same drive control device is used for tracking control. On the one hand, there is no need to separately support a complete tracking system for each group of collectors, which can greatly reduce the input cost brought by the tracking system; On the other hand, the power source of the tracking system is integrated into the power generation system, that is, while using the steam turbine to generate electricity, it can also control the light tracking, further reducing the equipment input. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the present invention.

[0018] Figure 2 For Figure 1 the enlarged structural diagram at A in

[0019] Figure 3 It is a schematic internal structure diagram of the medium valve in the present invention.

[0020] Figure 4 For Figure 1 the enlarged structural diagram at B in

[0021] Figure 5 It is a schematic connection diagram of the Venturi tube and the medium inlet tube in the present invention.

[0022] Figure 6 It is a schematic structural diagram of the transmission mechanism in the present invention.

[0023] Figure 7 It is a schematic structural diagram of the power generation and tracking drive system in the present invention.

[0024] Figure 8 It is a schematic internal structure diagram of the medium valve in another embodiment of the present invention.

[0025] The markings in the figure are as follows:

[0026] 1. Collector system; 11. Collector support; 12. Transmission mechanism; 121. Mounting base; 122. Reversing gear mechanism; 1221. Square shaft hole; 13. Collector; 14. Receiver; 2. Transmission rod; 21. Threaded sleeve; 3. Medium outlet pipe; 4. Medium inlet pipe; 5. Centrifugal fan; 51. Driving air duct; 52. Return air duct; 53. Venturi tube; 531. Upstream flow channel; 532. Cylindrical throat; 54. Medium valve; 541. Throttle port; 542. Oblique valve port; 543. Vertical flow channel; 544. Air outlet pipe; 6. Photovoltaic panel; 61. Lithium battery pack; 7. Power generation and tracking drive system; 71. Reducer; 72. Electric control clutch; 73. Steam turbine; 74. Generator; 8. Heat storage system; 9. Heat exchange system. Specific embodiments

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1 to 5, in an embodiment of the present invention, a solar power generation energy storage power supply system includes: a collector system 1, a power generation and tracking drive system 7, a heat storage system 8, and a heat exchange system 9. The collector system 1 includes a collector support 11, a collector 13, and a receiver 14. In this embodiment, a trough collector is taken as an example. The collector 13 is a trough collector, which is rotatably installed on the collector support 11. The receiver 14 is a vacuum heat pipe, which is located at the reflection focus of the collector 13. The receiver 14 is integrally connected to the collector 13. Both ends of the receiver 14 are respectively connected to a medium outlet pipe 3 and a medium inlet pipe 4. The medium outlet pipe 3 and the medium inlet pipe 4 are both connected to the heat exchange system 9. The heat exchange system 9 is used for heat exchange with the medium and generating steam. The heat exchange system 9 is respectively connected to the power generation and tracking drive system 7 and the heat storage system 8. The medium outlet pipe 3 and the medium inlet pipe 4 are used for circulating and transporting a heat exchange medium, such as heat-conducting oil, and are respectively used for transporting the heated heat exchange medium and the low-temperature medium after heat exchange by the heat exchange system 9. One end of the medium inlet pipe 4 close to the receiver 14 is connected to a Venturi tube 53, and the end far from the receiver 14 is connected to a medium valve 54. The medium valve 54 is connected to the Venturi tube 53 through a drive air duct 51. The other end of the Venturi tube 53 is connected to the air inlet of a centrifugal fan 5 through a return air duct 52. The air outlet of the centrifugal fan 5 is connected to the medium valve 54. The medium valve 54 is connected to the medium inlet pipe 4 through an inclined valve port 542. The inclined valve port 542 is an air flow channel that is not 90° relative to the axis of the medium inlet pipe 4, and the angle between the inclined valve port 542 and the flow direction of the heat exchange medium is less than 90° and should be greater than 15° to improve the effect. A throttle port 541 is provided between the medium valve 54 and the drive air duct 51. The throttle port 541 is a flow channel with a diameter smaller than the inlet of the medium valve 54. The cylindrical throat 532 of the Venturi tube 53 is communicated with the medium inlet pipe 4 through an upper flow channel 531. The centrifugal fan 5 is used for generating high-pressure air flow and sending it into the medium valve 54. The air flow enters the medium inlet pipe 4 and the drive air duct 51 respectively through the inclined valve port 542 and the throttle port 541. The high-pressure air flow entering the medium inlet pipe 4 will generate a driving force on the heat exchange medium in the pipe due to its inclination with the pipe axis, and send the medium to one end of the receiver 14. The air flow entering the drive air duct 51 enters the Venturi tube 53 and generates a negative pressure at the cylindrical throat 532, which has a negative pressure adsorption effect on the medium inlet pipe 4, so as to suck the gas injected into the pipe into the Venturi tube 53 and send it back to the centrifugal fan 5 for circulation. In this way, the use of a circulation pump for medium transportation is replaced, the medium resistance is reduced, and the problem that the circulation pump is unreliable under high-temperature working conditions will not occur. Moreover, during the period when the air flow drives the heat exchange medium, it contacts the low-temperature medium after heat exchange and will not have heat exchange with the medium, having little influence on the heat concentration process.

[0029] The centrifugal fan 5 is connected to the lithium battery pack 61, and the lithium battery pack 61 is connected to the photovoltaic panel 6 to provide power energy for the drive system with photovoltaic energy. The photovoltaic panel 6 can directly supply power to the fan and can also store the excess power.

[0030] As Figure 1 and Figure 6 , at the rotational connection between the collector 13 and the collector support 11, a transmission mechanism 12 is provided. The transmission mechanism 12 includes a mounting seat 121 and a reversing gear mechanism 122. The mounting seat 121 is mounted on the collector support 11. The reversing gear mechanism 122 is preferably a set of meshing bevel gears. Among them, one bevel gear is connected to the rotating shaft of the collector 13, and the other bevel gear is connected to a transmission rod 2. Specifically, square shaft holes 1221 are provided at the centers of the bevel gears. Square shaft structures are provided at the ends of the rotating shaft of the collector 13 and the transmission rod 2 to be connected in cooperation with the square shaft holes 1221. Both ends of the transmission rod 2 are respectively connected between adjacent two sets of transmission mechanisms 12, and a threaded sleeve 21 for adjusting the length of the transmission rod 2 is provided on the transmission rod 2;

[0031] As Figure 7 , the power generation and tracking drive system 7 includes a speed reducer 71, an electric control clutch 72, a steam turbine 73, and a generator 74. The generator 74 and the electric control clutch 72 are respectively connected to both ends of the output shaft of the steam turbine 73. The input end of the speed reducer 71 is connected to the electric control clutch 72, and the output end is connected to the transmission rod 2. The steam turbine 73 is driven by the steam generated by the heat exchange system 9 to drive the generator 74 to generate electricity, and the electric energy is incorporated into the power grid for power transmission. At the same time, through the control of the electric control clutch 72, the steam turbine 73 will drive the speed reducer 71 to operate at a set time, which can be specifically set according to the latitude of the location of the solar thermal power station and the light change time, so that the electric control clutch 72 opens and closes regularly. The speed reducer 71 will drive the transmission rod 2 to rotate, and through the transmission mechanism 12, the collector 13 and the receiver 14 will rotate slowly to adapt to the light angle; in this way, on the one hand, for an array of collectors 13, multiple sets of transmission rods 2 can be connected in sequence and controlled and driven synchronously. There is no need to separately support a complete tracking system for each set of collectors 13, which can greatly reduce the input cost brought by the tracking system, and the transmission mechanism 12 and the transmission rod 2 can be installed separately according to actual use; on the other hand, the power source of the tracking system is integrated into the power generation system, that is, while using the steam turbine 73 to generate electricity, it can also control the light tracking, further reducing the equipment input. For an array of collectors 13 that is not in the same position as the power generation system, a transmission structure such as a belt drive or a chain drive can be externally connected to the output end of the speed reducer 71 so that a set of power generation system can correspond to multiple arrays of collectors 13.

[0032] Example two, as Figure 8, in this embodiment, different from the first embodiment, a vertical flow channel 543 communicating with the medium inlet pipe 4 is provided in the medium valve 54. The vertical flow channel 543 is perpendicular to the axial direction of the medium inlet pipe 4, and an air outlet pipe 544 is connected to the vertical flow channel 543. The air outlet pipe 544 coincides with the axis of the medium inlet pipe 4. In this way, the driving air outlet angle is completely parallel to the medium inlet pipe 4, and a higher conveying efficiency of the heat exchange medium can be generated.

[0033] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be construed as limiting the claimed rights.

[0034] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A solar power generation energy storage power supply system, comprising: A collector system (1), a power generation and tracking drive system (7), a centrifugal fan (5), a photovoltaic panel (6), a heat storage system (8), and a heat exchange system (9). The collector system (1) includes a collector support (11), a collector (13), and a receiver (14). The collector (13) is rotatably mounted on the collector support (11). The receiver (14) is integrally connected to the collector (13). Both ends of the receiver (14) are respectively connected to a medium outlet pipe (3) and a medium inlet pipe (4). The medium outlet pipe (3) and the medium inlet pipe (4) are both connected to the heat exchange system (9). The heat exchange system (9) is respectively connected to the power generation and tracking drive system (7) and the heat storage system (8). It is characterized in that: One end of the medium inlet pipe (4) close to the receiver (14) is connected to a Venturi tube (53), and the end far from the receiver (14) is connected to a medium valve (54). The medium valve (54) is connected to the Venturi tube (53) through a drive air duct (51). The other end of the Venturi tube (53) is connected to the air inlet of the centrifugal fan (5) through a return air duct (52). The air outlet of the centrifugal fan (5) is connected to the medium valve (54). The medium valve (54) is connected to the medium inlet pipe (4) through an inclined valve port (542). The inclined valve port (542) is an air flow passage that is not 90° relative to the axis of the medium inlet pipe (4), and the angle between the inclined valve port (542) and the flow direction of the heat exchange medium is less than 90°. The cylindrical throat (532) of the Venturi tube (53) is communicated with the medium inlet pipe (4) through an upper flow passage (531).

2. The solar power generation energy storage power supply system according to claim 1, characterized in that: A vertical flow passage (543) communicating with the medium inlet pipe (4) is provided inside the medium valve (54). The vertical flow passage (543) is perpendicular to the axis of the medium inlet pipe (4), and an air outlet pipe (544) is connected to the vertical flow passage (543). The air outlet pipe (544) coincides with the axis of the medium inlet pipe (4).

3. The solar power generation energy storage power supply system according to claim 1, characterized in that: The angle between the inclined valve port (542) and the flow direction of the heat exchange medium is greater than 15°.

4. The solar power generation energy storage power supply system according to claim 2, characterized in that: A throttle port (541) is provided between the medium valve (54) and the drive air duct (51). The throttle port (541) is a flow passage with a diameter smaller than the inlet of the medium valve (54).

5. The solar power generation energy storage power supply system according to claim 1, characterized in that: The centrifugal fan (5) is connected to a lithium battery pack (61), and the lithium battery pack (61) is connected to the photovoltaic panel (6).

6. The solar power generation energy storage power supply system according to claim 1, characterized in that: A transmission mechanism (12) is provided at the rotational connection of the collector (13) and the collector support (11). A transmission rod (2) is connected between adjacent two sets of transmission mechanisms 12. The transmission mechanism (12) includes a mounting seat (121) and a reversing gear mechanism (122). The mounting seat (121) is mounted on the collector support (11).

7. The solar power generation energy storage power supply system according to claim 6, characterized in that: The reversing gear mechanism (122) is a set of meshing bevel gears. Square shaft holes (1221) are provided at the centers of the bevel gears. Square shaft structures are provided at the ends of the rotating shaft of the collector (13) and the transmission rod (2).

8. The solar power generation energy storage power supply system according to claim 7, characterized in that: A threaded sleeve (21) for adjusting the length of the transmission rod (2) is provided on the transmission rod (2).

9. The solar power generation energy storage power supply system according to claim 1, characterized in that: The power generation and tracking drive system (7) includes a speed reducer (71), an electric control clutch (72), a steam turbine (73), and a generator (74). The generator (74) and the electric control clutch (72) are respectively connected to both ends of the output shaft of the steam turbine (73), and the input end of the speed reducer (71) is connected to the electric control clutch (72).

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