Photothermal heat storage system

Abstract

The application discloses a photothermal heat storage system, which comprises a plurality of disc type light collecting devices, cavity type heat collectors, driving devices and heat storage devices. The disc type light collecting device comprises a reflector, a first support bracket, a first pitching bracket, a first rotating seat and a light collecting base. The cavity type heat collector corresponds to the disc type light collecting device one by one. The cavity type heat collector comprises a second rotating seat, a second support bracket, a second pitching bracket and a heat collector cover. The driving device drives the second rotating seat and the second pitching bracket to move. The heat storage device comprises a cold tank and a hot tank. The heat storage medium of the cold tank is pumped into a pipeline through a circulating pump. The pipeline passes through the center of the second rotating seat, the second pitching bracket and the heat collector cover and is connected with a heat collecting pipe bundle. The heat collecting pipe bundle is connected with the hot tank. The photothermal heat storage system has the advantages of high efficient light collecting and heat collecting.

Description

Technical Field

[0001] This invention relates to the field of solar thermal energy storage technology, and more particularly to a solar thermal energy storage system. Background Technology

[0002] There are currently two forms of large-scale power generation using solar energy: photovoltaic power generation and concentrated solar power (CSP). CSP theoretically has advantages such as high power generation efficiency, long equipment life, and continuous power generation through thermal storage, and has good development prospects. However, the tower and trough solar collectors currently used in large-scale CSP power generation have low overall efficiency, which greatly affects the development and application of large-scale CSP power generation. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of the present invention propose a photothermal thermal storage system that has the advantages of highly efficient light and heat collection.

[0004] According to an embodiment of the present invention, a solar thermal energy storage system includes multiple dish-type light-collecting devices, cavity-type solar collectors, a driving device, and a heat storage device. Each dish-type light-collecting device includes a reflector, a first support bracket, a first elevation bracket, a first rotating base, and a light-collecting base. The reflector is connected to the first support bracket, which is located on and slidably connected to the first elevation bracket. The first elevation bracket is located on the rotating base and pivotally connected to it. The first rotating base is connected to the light-collecting base. Each cavity-type solar collector corresponds to one of the dish-type light-collecting devices. Each cavity-type solar collector includes... The device includes a second rotating base, a second supporting bracket, a second pitching bracket, and a collector cover. The second rotating base is located on the second supporting bracket and is pivotally connected to the second pitching bracket. The collector cover is slidably connected to the second pitching bracket. The driving device drives the second rotating base and the second pitching bracket to move. The heat storage device includes a cold tank and a hot tank. The heat storage medium in the cold tank is pumped into a pipeline through a circulation pump. The pipeline passes through the center of the second rotating base, the second pitching bracket, and the collector cover and is connected to the heat collection tube bundle. The heat collection tube bundle is located inside the collector cover and is connected to the hot tank.

[0005] The solar thermal energy storage system according to embodiments of the present invention has the advantages of efficient solar and thermal energy collection. This application efficiently collects solar energy and converts it into thermal energy using multiple dish-type solar collectors, and utilizes thermal storage media such as molten salt to absorb heat and collect the thermal storage media for centralized thermal storage, thus achieving both decentralized and centralized thermal energy collection and storage.

[0006] In some embodiments, the first pitch support has a first sliding guide rail, and the first support bracket slides along the first sliding guide rail.

[0007] In some embodiments, the second pitch support has a second sliding rail, and the collector cover is slidably connected along the second sliding rail.

[0008] In some embodiments, a sliding baffle is provided between the second pitch support and the collector cover, the sliding baffle is slidably connected to the second sliding guide rail, and the collector cover is connected to the sliding baffle.

[0009] In some embodiments, the sliding baffle has a clearance groove for the passage of the pipe.

[0010] In some embodiments, the heat collection tube bundle is located in the upper space of the heat collector cover and there is a gap between it and the heat collector cover.

[0011] In some embodiments, the collector cover is a spherical cover, the collector cover has a converging light inlet and a pipe inlet, the converging light inlet is a circular inlet, and the pipe inlet is a rectangular opening.

[0012] In some embodiments, the normal axis of the converging light inlet of the solar collector cover coincides with the axis of the reflector.

[0013] In some embodiments, the center of the second rotating seat is a hollow ring.

[0014] In some embodiments, the drive device includes a motor, a reducer, and a transmission component. The motor is connected to the transmission component via the reducer, and the transmission component is connected to the second rotary seat and the second pitch support. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a photothermal thermal storage system according to an embodiment of the present invention.

[0016] Figure 2 This is a cross-sectional schematic diagram of the collector of the solar thermal energy storage system according to an embodiment of the present invention.

[0017] Figure 3 This is a cross-sectional schematic diagram of another usage location of the solar collector in the solar thermal energy storage system according to an embodiment of the present invention.

[0018] Reference numerals in the attached drawings: 1. Disc-type light-collecting device; 2. Circulating pump; 3. Cold tank; 4. Hot tank; 5. Pipeline; 6. Reflector; 7. First support bracket; 8. First elevation bracket; 9. First rotating seat; 10. Light-collecting base; 11. Second support bracket; 12. Second rotating seat; 13. Second elevation bracket; 14. Collector cover; 15. Collector tube bundle; 16. Drive device; 17. Sliding baffle. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] As a distributed power generation device, dish-type solar thermal power has high light collection efficiency. Therefore, it is of great significance to explore ways to combine these methods to develop a more optimized large-scale solar and thermal collection system.

[0021] According to embodiments of the present invention, a photothermal thermal storage system, such as Figures 1 to 3As shown, the solar thermal energy storage system includes multiple dish-type light-collecting devices 1, cavity-type collectors, a drive device 16, and a heat storage device. Each dish-type light-collecting device 1 includes a reflector 6, a first support bracket 7, a first elevation bracket 8, a first rotating base 9, and a light-collecting base 10. The reflector 6 is connected to the first support bracket 7. The first support bracket 7 is located on and slidably connected to the first elevation bracket 8. The first elevation bracket 8 is located on the rotating base and pivotally connected to the first rotating base 9. The first rotating base 9 is connected to the light-collecting base 10. Each cavity-type collector corresponds to one of the dish-type light-collecting devices 1. The cavity-type collector includes a second rotating base 12 and a second support bracket. 11. The second pitch support 13 and the collector cover 14, the second rotating seat 12 is located on the second support support 11, the second rotating seat 12 is pivotally connected to the second pitch support 13, the collector cover 14 is slidably connected to the second pitch support 13, the driving device 16 drives the second rotating seat 12 and the second pitch support 13 to move, the heat storage device includes a cold tank 3 and a hot tank 4, the heat storage medium of the cold tank 3 is sent into the pipe 5 through the circulation pump 2, the pipe 5 passes through the center of the second rotating seat 12, the second pitch support 13 and the collector cover 14 and is connected to the heat collection tube bundle 15, the heat collection tube bundle 15 is located inside the collector cover 14 and is connected to the hot tank 4. The reflector 6 is a parabolic reflector 6. The reflector 6 achieves pitch and rotation functions through the cooperation of the first rotating seat 9 and the first pitch support 8. Driven by external force, it tracks the sun's trajectory, with the axis of the reflector 6 always pointing towards the sun. During movement, the geometric focusing point of the reflector 6 remains within the collector cover 14. The reflector 6 uses an integral or modular parabolic reflector 6 as the light-gathering element. Sunlight is reflected once and focused within the collector cover 14. The heat-collecting tube bundle 15 within the collector cover 14 absorbs heat and heats the heat storage medium inside the tubes. Each dish-type light-collecting device 1 can operate independently. Finally, the heated heat storage medium is collected and fed into the heat tank 4 for storage. The collector cover 14 is driven by the drive device 16 to rotate and pitch, adjusting its position so that the axis of the light-receiving opening of the collector cover 14 always coincides with the axis of the reflector 6, thus converging sunlight and illuminating the heat-collecting tube bundle 15 within the collector cover 14 at different sun positions. The cold tank 3 and hot tank 4 of the heat storage device can be steel containers, and the stored heat storage medium can be heat transfer oil, molten salt, etc. The cold heat storage medium is stored in the cold tank 3. The cold tank 3 and hot tank 4 can be cascaded in different capacities to achieve large-scale heat collection and storage.

[0022] The solar thermal energy storage system according to embodiments of the present invention has the advantages of high-efficiency solar and heat collection, good light concentration effect, and high heat storage efficiency. This application efficiently collects solar energy and converts it into heat energy using multiple dish lasers, and utilizes heat storage media such as molten salt to absorb heat and collect the heat storage media for centralized heat storage, thus achieving both decentralized heat collection and centralized heat storage.

[0023] In some embodiments, such as Figure 1 As shown, the first pitch support 8 has a first sliding guide rail, and the first support support 7 slides along the first sliding guide rail.

[0024] Specifically, a first sliding guide rail is provided on the first pitch support 8, and a first support bracket 7 is installed on the first sliding guide rail so that the reflector 6 on the first support bracket 7 can slide along the guide rail to change the pitch angle of the reflector 6, thereby realizing the pitch movement of the reflector 6. The first pitch support 8 rotates horizontally on the first rotating seat 9 to realize the horizontal rotation movement of the reflector 6. Adjusting the pitch and rotation movements of the reflector 6 makes the geometric focusing point of the reflector 6 remain unchanged in spatial position.

[0025] In some embodiments, such as Figure 1 As shown, the second pitch support 13 has a second sliding guide rail, and the collector cover 14 slides along the second sliding guide rail.

[0026] Specifically, the second pitch support 13 is a long, curved structure connected to the rotating seat. The second sliding guide rail on the pitch support is also curved. The collector cover 14 slides on the second sliding guide rail to adjust its pitch angle. The second rotating seat 12 causes the second pitch support 13 to rotate. Through this rotation and pitch motion, light from the dish-type light-collecting device 1 enters the collector cover 14 and irradiates the collector tube bundle 15. The second pitch support 13 and the collector cover 14 are made of heat-insulating material to ensure the thermal efficiency of the chamber collector.

[0027] In some embodiments, such as Figure 2 and Figure 3 As shown, a sliding baffle 17 is provided between the second pitch support 13 and the collector cover 14. The sliding baffle 17 is slidably connected to the second sliding guide rail, and the collector cover 14 is connected to the sliding baffle 17.

[0028] Specifically, the sliding baffle 17 has a long, curved surface structure that can adapt to the shape of the second pitch support 13 and the collector cover 14. The sliding baffle 17 is connected to the collector cover 14, and the sliding baffle 17 is driven to move within the second sliding guide rail to adjust the pitch angle of the collector cover 14.

[0029] In some embodiments, such as Figure 2 and Figure 3 As shown, the sliding baffle 17 has a clearance groove for the passage of the pipe 5.

[0030] Specifically, the clearance groove is elongated, and the pipe 5 enters the collector cover 14 through the clearance groove. The clearance groove prevents the sliding baffle 17 from damaging the pipe 5 during pitching motion. The sliding baffle 17 is made of thermal insulation material to ensure the thermal efficiency of the cavity collector.

[0031] In some embodiments, such as Figure 1 As shown, the heat collection tube bundle 15 is located in the upper space of the heat collector cover 14 and there is a gap between it and the heat collector cover 14.

[0032] Specifically, the heat collection tube bundle 15 is formed by bending and coiling high-temperature resistant metal tubes. The heat collection tube bundle 15 receives sunlight reflected and concentrated from different angles and transfers heat to the heat storage medium.

[0033] In some embodiments, such as Figure 2 and Figure 3 As shown, the collector cover 14 is a spherical cover, and the collector cover 14 has a converging light inlet and a pipe 5 inlet.

[0034] Specifically, the solar collector cover 14 has a circular light-gathering inlet to ensure the area of ​​sunlight entering, while the pipe 5 has a rectangular opening to allow the pipe 5 to move along the pipe 5 inlet, thus preventing the solar collector cover 14 from damaging the pipe 5 and causing it to break.

[0035] In some embodiments, the normal axis of the converging light inlet of the collector cover 14 coincides with the axis of the reflector 6.

[0036] Specifically, the normal axis of the converging light inlet coincides with the axis of the reflector 6, so that the sunlight from the reflector 6 is concentrated to the maximum extent onto the heat collection tube bundle 15 inside the collector cover 14, which can ensure thermal efficiency.

[0037] In some embodiments, such as Figure 2 and Figure 3 As shown, the center of the second rotating seat 12 is a hollow ring.

[0038] Specifically, the center of the second rotating seat 12 is a hollow ring, which allows the pipe 5 to pass through smoothly and avoids damage to the pipe 5 when the second rotating seat 12 and the second pitch support 13 rotate.

[0039] In some embodiments, the drive device 16 includes a motor, a reducer, and a transmission component. The motor is connected to the transmission component via the reducer, and the transmission component is connected to the second rotary seat 12 and the second pitch support 13.

[0040] Specifically, driven by the motor, the transmission component drives the second pitch support 13 to rotate relative to the second rotating seat 12, which in turn drives the sliding baffle 17 on the second sliding guide rail to move, thereby realizing the pitch movement of the collector cover 14. The transmission component can be a structure such as a gear rack, a worm gear, or other mechanisms that realize mechanical transmission through friction transmission.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A photo-thermal heat storage system, characterized by, The application relates to a solar energy collection system, which comprises: a plurality of dish light collectors, each of which comprises a reflector, a first supporting bracket, a first tilting bracket, a first rotating seat and a light collection base, the reflector being connected with the first supporting bracket, the first supporting bracket being located on the first tilting bracket and being slidably connected with the first tilting bracket, the first tilting bracket being located on the rotating seat and being pivotally connected with the first rotating seat, the first rotating seat being connected with the light collection base; a cavity type heat collector corresponding to each of the dish light collectors, the cavity type heat collector comprising a second rotating seat, a second supporting bracket, a second tilting bracket and a heat collector cover, the second rotating seat being located on the second supporting bracket, the second rotating seat being pivotally connected with the second tilting bracket, the heat collector cover being slidably connected with the second tilting bracket, the reflector realizing tilting and rotating functions through cooperation of the first rotating seat and the first tilting bracket, and tracking a sun orbit under the driving of external force, the axis of the reflector always pointing to the sun, and the geometric light collection point of the reflector being kept in the heat collector cover during movement; a driving device driving the second rotating seat and the second tilting bracket to move; a heat storage device comprising a cold tank and a hot tank, a heat storage medium in the cold tank being pumped into a pipeline through a circulating pump, the pipeline passing through the center of the second rotating seat, the second tilting bracket and the heat collector cover and being connected with a heat collection pipe bundle, the heat collection pipe bundle being located in the heat collector cover and being connected with the hot tank.

2. The photothermal heat storage system of claim 1, wherein, The first tilting bracket is provided with a first sliding guide rail, and the first supporting bracket slides along the first sliding guide rail.

3. The photothermal heat storage system of claim 2, wherein, The second tilting bracket is provided with a second sliding guide rail, and the heat collector cover is slidably connected along the second sliding guide rail.

4. The photothermal thermal storage system of claim 3, wherein, A sliding baffle is arranged between the second tilting bracket and the heat collector cover, the sliding baffle is slidably connected with the second sliding guide rail, and the heat collector cover is connected with the sliding baffle.

5. The photothermal thermal storage system of claim 4, wherein, The sliding baffle is provided with a avoiding groove for the pipeline.

6. The photothermal thermal storage system of claim 2, wherein, The heat collection pipe bundle is located in the upper space of the heat collector cover and has a gap with the heat collector cover.

7. The photothermal heat storage system of claim 1, wherein, The heat collector cover is a spherical cover, and the heat collector cover is provided with a converging light inlet and a pipeline inlet, the converging light inlet is a circular inlet, and the pipeline inlet is a rectangular opening.

8. The photothermal heat storage system of claim 7, wherein, The normal axis of the converging light inlet of the heat collector cover coincides with the axis of the reflector.

9. The photothermal thermal storage system of claim 1, wherein, The center of the second rotating seat is a hollow ring.

10. The photothermal heat storage system of claim 1, wherein, The driving device comprises a motor, a speed reducer and a transmission member, the motor is connected with the transmission member in transmission through the speed reducer, and the transmission member is connected with the second rotating seat and the second tilting bracket in transmission.

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