Efficient light condensation and heat dissipation synergetic heat collection device of photo-thermal power station

Abstract

The invention discloses an efficient light condensation and heat dissipation synergistic photo-thermal power station heat collection device, and belongs to the field of heat collection, the efficient light condensation and heat dissipation synergistic photo-thermal power station heat collection device comprises a heat collection frame, the heat collection frame is fixedly installed at the top of an external heat collection tower, and a circle of annular light-transmitting glass is fixedly connected to the exterior of the heat collection frame; a deformation plate is used as a thermosensitive driving element. When the internal temperature of the heat collection device rises, the deformation plate is heated to bend and deform, the transmission system is pushed through the lifting ring, the connecting plate and the helical tooth plate, the sealing plate is finally driven to be opened, light-gathering arc-shaped glass on the inner surface of the sealing plate and heat dissipation arc-shaped fin plates on the back face of the sealing plate correspond to two modes correspondingly, and when the temperature is too high, the opened sealing plate enables heat dissipation fins to be exposed; air convection heat dissipation is enhanced, and overtemperature of the heat collecting pipe is prevented; and when the temperature is reduced, the deformation plate recovers, the sealing plate is closed, the heat preservation cavity is formed, and the condensation mode is switched, the process is completely and passively carried out, external energy and control are not needed, and intrinsic intelligentization and energy conservation are achieved.

Description

Technical Field

[0001] This invention belongs to the field of solar thermal technology, specifically relating to a solar thermal power plant solar thermal power collection device that combines high-efficiency light concentration and heat dissipation. Background Technology

[0002] Concentrated solar power (CSP) technology, as a clean and peak-shaving renewable energy source, is receiving increasing attention. Tower CSP systems use heliostats to reflect sunlight onto a collector at the top of the tower. The heat is absorbed by the working fluid within the collector, which then drives a turbine to generate electricity. As the core component of energy conversion, the collector's photothermal conversion efficiency directly determines the overall power plant's power generation efficiency.

[0003] Currently, the solar collectors at the top of solar towers typically consist of a collector frame covered with transparent glass, forming a greenhouse-like cavity. Inside, collector tubes absorb heat. However, during periods of extremely high solar intensity, such as midday, the concentrated solar power far exceeds the rated heat absorption capacity of the collector tubes and the heat-carrying capacity of the working fluid, leading to excessively high temperatures within the collector tubes and the cavity. This not only accelerates the aging and failure of the selective absorption coating on the collector tube surface, increasing radiative heat loss, but also poses a safety risk of deformation or damage to the collector tubes due to overheating. Conversely, during the early morning or late evening, or when cloud cover weakens sunlight, the solar collector needs to minimize heat loss to maintain its operating temperature.

[0004] In the prior art, independent forced air cooling or water cooling systems are usually used to solve the heat dissipation problem, but this requires additional electrical energy, which increases operating costs and system complexity. Therefore, the present invention provides a solar thermal power plant collector device that combines efficient light concentration and heat dissipation. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency solar thermal power plant heat collection device that combines high-efficiency light concentration and heat dissipation, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency solar thermal power plant collector device that combines high-efficiency light concentration and heat dissipation, comprising a collector frame, the collector frame being fixedly installed on the top of an external collector tower, a ring of translucent glass being fixedly connected to the outside of the collector frame, a star-shaped frame being fixedly connected to the bottom of the inner cavity of the collector frame, a collector tube body located on the concentrating beam being fixedly connected to the top of the star-shaped frame, and auxiliary components being provided on the top of the collector frame.

[0007] In a preferred embodiment, the auxiliary component includes a hemispherical cover located at the top of the heat collection rack. Multiple sealing grooves are equidistantly provided on the arc-shaped surface of the hemispherical cover, and a sealing plate adapted to each sealing groove is rotatably connected inside the sealing groove.

[0008] In a preferred embodiment, a plurality of heat dissipation arc-shaped fins are fixedly connected at equal intervals on the outer surface of each sealing plate, and a light-concentrating arc-shaped glass is fixedly connected to the side of the sealing plate facing the heat collection tube body.

[0009] In a preferred embodiment, a top plate is fixedly connected to the top of the inner cavity of the hemispherical cover, a fixing ring is fixedly connected to the bottom of the top plate, a plurality of deformation plates are fixedly connected to the top of the fixing ring at equal intervals, and a lifting ring is fixedly connected to the top of the plurality of deformation plates.

[0010] In a preferred embodiment, the deformation plate and the sealing plate correspond one-to-one, and the deformation plate has a weakening groove on its outer surface, with the weakening groove having a groove peak near the center of the deformation plate.

[0011] In a preferred embodiment, the top of the inner cavity of the heat collection rack is provided with multiple sets of driving components, and a set of driving components is provided between each set of deformation plates and sealing plates.

[0012] In a preferred embodiment, both ends of each sealing plate are rotatably connected to the sealing groove via a rotating shaft. A connecting bevel gear is fixedly connected to the top of the rotating shaft located at the top of the sealing plate. Multiple transmission bevel gears that mesh with each connecting bevel gear are rotatably connected to the top of the inner cavity of the heat collection rack.

[0013] In a preferred embodiment, the inner cavity of the heat collection rack is rotatably connected to a transmission wheel that corresponds one-to-one with the deformation plate and the sealing plate on the side facing the lifting ring. One side of the transmission wheel is provided with a first mating bevel tooth that meshes with the transmission bevel gear.

[0014] In a preferred embodiment, a connecting plate is fixedly connected to one side of the lifting ring facing each transmission wheel, and a helical tooth plate is fixedly connected to the bottom of each connecting plate. A second mating bevel tooth that meshes with the helical tooth plate is provided on the contact surface between the transmission wheel and the helical tooth plate.

[0015] In a preferred embodiment, a medium input pipe and a medium output pipe are fixedly connected to both sides of the bottom end of the heat collection tube body, respectively.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This high-efficiency solar thermal power plant collector device, which combines concentrating and dissipating light, utilizes a deformable plate as a thermally sensitive driving element. When the internal temperature of the collector device rises, the deformable plate bends due to heat, driving the transmission system through a lifting ring, connecting plate, and helical toothed plate, ultimately opening the sealing plate. The concentrating arc-shaped glass on the inner surface of the sealing plate and the heat dissipation arc-shaped fins on the back correspond to two modes, respectively. When the temperature is too high, the opened sealing plate exposes the heat dissipation fins, enhancing air convection heat dissipation and preventing the collector tube from overheating. When the temperature drops, the deformable plate returns to its original shape, the sealing plate closes, forming an insulated cavity and switching to concentrating mode. This process is entirely passive, requiring no external energy or control, achieving inherent intelligence and energy saving.

[0018] This high-efficiency solar thermal power plant collector, which combines high-efficiency light concentration and heat dissipation, uses multiple concentrating curved glass elements to form a complete secondary concentrating surface in the closed-plate concentrating mode. This surface can refocus and reflect light rays that are not directly reflected to the collector tube by the main heliostat field (such as scattered light and edge leakage light) back onto the collector tube, effectively increasing the light flux projected onto the collector tube and thus improving the light energy input and conversion efficiency of the entire system.

[0019] This high-efficiency solar thermal power plant collector device combines light concentration and heat dissipation. The linear displacement of the deformation plate is converted into the rotational motion of the transmission wheel through the meshing of the helical tooth plate and the second mating bevel teeth on the transmission wheel. Then, the power is transmitted to the rotational shaft of the sealing plate through the bevel gear set (transmission bevel gear and connecting bevel gear), which finally realizes the rotational opening and closing of the sealing plate. This design efficiently and reliably amplifies and transmits the tiny internal thermal deformation to the action of external components. The transmission chain is simple and has good rigidity, ensuring the accurate execution of the action.

[0020] This high-efficiency solar thermal power plant collector device, which combines high-efficiency light concentration and heat dissipation, features a weakening groove in the middle of the deformation plate. This effectively concentrates strain, causing deformation to occur at a predetermined position, thus improving the sensitivity and consistency of thermal drive. The entire device has a closed structure, with the transmission components located inside the collector frame. This reduces the impact of harsh external environments such as wind, sand, rain, and snow, lowers the failure rate, and improves the stability and lifespan of the equipment during long-term operation in the field.

[0021] This high-efficiency solar thermal power plant collector unit combines concentrated light and heat dissipation. The design achieves its function through a purely mechanical structure, eliminating the need for expensive electrical control systems, sensors, and the energy required for active heat dissipation. This significantly reduces manufacturing and operating costs. At the same time, it extends the service life of the collector tubes by preventing overheating and improves power generation revenue by enhancing light concentration. It improves the overall economic efficiency of the power plant from both "cost reduction" and "revenue generation" perspectives. Attached Figure Description

[0022] Figure 1 This is a front view of the structure of the present invention;

[0023] Figure 2 This is a partial cross-sectional view of the structure of the present invention;

[0024] Figure 3 This is a bottom view of the structure of the present invention;

[0025] Figure 4 This is a top view of the structure of the present invention;

[0026] Figure 5 for Figure 2 A magnified schematic diagram of point A;

[0027] Figure 6 for Figure 2 A magnified schematic diagram of B.

[0028] In the diagram: 1. Heat collector frame; 101. Hemispherical cover; 102. Sealing groove; 103. Top plate; 104. Star-shaped frame; 2. Transparent glass; 3. Sealing plate; 301. Heat dissipation arc-shaped fin plate; 302. Focusing arc-shaped glass; 303. Rotating shaft; 4. Heat collector tube body; 401. Medium input pipe; 402. Medium output pipe; 5. Fixing ring; 6. Connecting bevel gear; 7. Transmission bevel gear; 8. Transmission wheel; 801. First mating bevel gear; 802. Second mating bevel gear; 9. Lifting ring; 901. Connecting plate; 902. Helical tooth plate; 10. Deformation plate; 1001. Weakening groove. Detailed Implementation

[0029] The present invention will be further described below with reference to embodiments.

[0030] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0031] Please see Figures 1-6This invention provides a high-efficiency solar thermal power plant collector device that combines high-efficiency light concentration and heat dissipation. It includes a collector frame 1, which is fixedly installed on the top of an external solar collector tower. A ring of translucent glass 2 is fixedly connected to the outside of the collector frame 1. A star-shaped frame 104 is fixedly connected to the bottom of the inner cavity of the collector frame 1. A collector tube body 4 located on the concentrating beam is fixedly connected to the top of the star-shaped frame 104. An auxiliary component is provided at the top of the collector frame 1. The auxiliary component includes a hemispherical cover 101 located at the top of the collector frame 1. Multiple sealing grooves 102 are equidistantly opened on the arc-shaped surface of the hemispherical cover 101. Each sealing groove 102 is rotatably connected to a matching... The sealing plate 3 has multiple heat dissipation arc-shaped fins 301 fixedly connected at equal intervals on its outer surface. The sealing plate 3 has a focusing arc-shaped glass 302 fixedly connected on the side facing the heat collection tube body 4. The top of the inner cavity of the hemispherical cover 101 is fixedly connected to a top plate 103. The bottom of the top plate 103 is fixedly connected to a fixing ring 5. Multiple deformation plates 10 are fixedly connected at equal intervals in a ring on the top of the fixing ring 5. The top of the multiple deformation plates 10 is fixedly connected to a lifting ring 9. The deformation plates 10 correspond one-to-one with the sealing plate 3. The deformation plates 10 have a weakening groove 1001 opened on the outer surface. The weakening groove 1001 has a groove peak near the center of the deformation plate 10.

[0032] When the illumination conditions are normal and the internal temperature of the heat collection device is within a reasonable range, the deformation plate 10 remains in its initial state. At this time, the sealing plate 3 is in a closed state. The concentrating arc glass 302 on the side of the sealing plate 3 facing the heat collection tube body 4 together form a complete secondary concentrating surface. Part of the sunlight from the heliostat field is directly reflected onto the heat collection tube body 4, while the other part of the scattered light, edge leakage light, etc., are reflected onto the heat collection tube body 4 through the converging effect of the secondary concentrating surface. The working fluid inside the heat collection tube body 4 absorbs heat. The low-temperature working fluid input through the medium input pipe 401 absorbs heat and becomes a high-temperature working fluid, which is then output through the medium output pipe 402 to drive the steam turbine to generate electricity.

[0033] In this embodiment, please refer to Figures 1-6The top of the inner cavity of the heat collector 1 is provided with multiple sets of drive components. Each set of drive components is arranged between the deformation plate 10 and the sealing plate 3. Both ends of each sealing plate 3 are rotatably connected to the sealing groove 102 via a rotating shaft 303. A connecting bevel gear 6 is fixedly connected to the top of the rotating shaft 303 located at the top of the sealing plate 3. Multiple transmission bevel gears 7 that mesh with each connecting bevel gear 6 are rotatably connected to the top of the inner cavity of the heat collector 1. On the side of the inner cavity of the heat collector 1 facing the lifting ring 9, there are rotatably connected to the deformation plate 10 and the sealing groove 102. The transmission wheel 8 corresponds to the plate 3. One side of the transmission wheel 8 is provided with a first mating bevel tooth 801 that meshes with the transmission bevel gear 7. The lifting ring 9 is fixedly connected to the side facing each transmission wheel 8 with a connecting plate 901. The bottom of each connecting plate 901 is fixedly connected with a helical tooth plate 902. The contact surface between the transmission wheel 8 and the helical tooth plate 902 is provided with a second mating bevel tooth 802 that meshes with the helical tooth plate 902. The two sides of the bottom end of the heat collection tube body 4 are respectively fixedly connected with a medium input pipe 401 and a medium output pipe 402.

[0034] During periods of extremely high sunlight intensity, such as midday, the concentrated power far exceeds the rated heat absorption capacity of the main body 4 of the heat collector tube and the heat carrying capacity of the working fluid. The internal temperature of the heat collector continuously rises, and the deformation plate 10 is affected by the high temperature. Due to the design of the weakening groove 1001 (the groove peak is near the center of the deformation plate 10), the deformation plate 10 bends at a predetermined position, bending towards the top of the inner cavity of the hemispherical cover 101, thereby causing the lifting ring 9 to move downwards.

[0035] When the lifting ring 9 moves downward, it drives the helical tooth plate 902 to move downward through the connecting plate 901. The helical tooth plate 902 meshes with the second mating bevel tooth 802 on the transmission wheel 8, causing the transmission wheel 8 to rotate. When the transmission wheel 8 rotates, the first mating bevel tooth 801 on one side meshes with the transmission bevel gear 7, causing the transmission bevel gear 7 to rotate. The transmission bevel gear 7 then meshes with the connecting bevel gear 6, thereby causing the rotating shaft 303 to rotate. Finally, the sealing plate 3 rotates around the rotating shaft 303 and opens. After the sealing plate 3 opens, the heat dissipation arc fin plate 301 on its outer surface is exposed, which enhances air convection heat dissipation and allows the heat inside the heat collection device to dissipate quickly, preventing the heat collection tube body 4 from overheating.

[0036] When sunlight weakens due to morning or evening cloud cover, the internal temperature of the solar collector gradually decreases, the deformation plate 10 gradually returns to its initial shape, and drives the lifting ring 9 to move upward. The upward movement of the lifting ring 9 drives the transmission wheel 8 to rotate in the opposite direction through the connecting plate 901 and the helical tooth plate 902, and then drives the rotating shaft 303 to rotate in the opposite direction through the transmission bevel gear 7 and the connecting bevel gear 6, so that the sealing plate 3 rotates around the rotating shaft 303 to close, re-form the heat preservation cavity and switch to the light-concentrating mode.

[0037] Using the deformation plate 10 as a thermally sensitive driving element, the sealing plate 3 is automatically opened and closed according to the temperature change inside the heat collection device. No external energy is required for driving and control, which realizes the essential intelligence and energy saving. Compared with the traditional independent forced air cooling or water cooling system, it greatly reduces the operating cost and system complexity.

[0038] In the focused mode with the sealing plate 3 closed, the secondary focused surface composed of multiple focused arc-shaped glass 302 can refocus and reflect light that is not directly reflected to the main heliostat field onto the main body of the heat collector tube 4 (such as scattered light and edge leakage light) onto the main body of the heat collector tube 4, effectively increasing the light flux projected onto the main body of the heat collector tube 4, thereby improving the light energy input and conversion efficiency of the entire system and increasing the power generation revenue.

[0039] The linear displacement of the deformation plate 10 is converted into the rotational motion of the transmission wheel 8 through the meshing of the helical tooth plate 902 and the second mating bevel tooth 802 on the transmission wheel 8. Then, the power is transmitted to the rotating shaft 303 of the sealing plate 3 through the bevel gear set (transmission bevel gear 7 and connecting bevel gear 6), which finally realizes the rotational opening and closing of the sealing plate 3. This design efficiently and reliably amplifies and transmits the tiny internal thermal deformation to the action of the external components. The transmission chain is simple and has good rigidity, ensuring the accurate execution of the action.

[0040] The weakening groove 1001 opened in the middle of the deformation plate 10 can effectively concentrate the strain and make the deformation occur at the predetermined position, which improves the sensitivity and consistency of thermal drive. The entire device structure is closed, and the transmission components are located inside the heat collection frame 1, which reduces the impact of harsh external environments such as wind, sand, rain and snow, reduces the failure rate, and improves the stability and life of the equipment during long-term operation in the field.

[0041] This design achieves functionality through a purely mechanical structure, eliminating the need for expensive electronic control systems, sensors, and the energy required for active heat dissipation, significantly reducing manufacturing and operating costs. At the same time, it extends the service life of the main body of the heat collection tube 4 by preventing overheating and improves power generation revenue by enhancing light concentration, thus improving the overall economic efficiency of the power plant from both "cost reduction" and "revenue generation" perspectives.

[0042] The working principle and usage process of this invention are as follows: First, when the sunlight is normal and the internal temperature of the heat collection device is reasonable, the deformation plate 10 remains in its initial state, the sealing plate 3 is closed, and the light-concentrating arc glass 302 on it forms a secondary light-concentrating surface. Some sunlight is directly reflected to the heat collection tube body 4, and scattered light is also reflected to the heat collection tube body 4 after secondary convergence. The working fluid enters through the medium input pipe 401, absorbs heat, and is output through the medium output pipe 402 to drive the steam turbine to generate electricity.

[0043] The midday sunlight is extremely strong, and the heat absorption capacity of the heat collection tube body 4 and the heat carrying capacity of the working fluid are increased. The temperature inside the device rises, and the deformation plate 10 bends at the predetermined position due to the weakening groove 1001 design. This causes the lifting ring 9 to move downwards. The transmission wheel 8 rotates through the connecting plate 901 and the helical tooth plate 902. Then, the rotating shaft 303 rotates through the bevel gear set. The sealing plate 3 opens, and the heat dissipation arc fin plate 301 is exposed to dissipate heat and prevent overheating.

[0044] When the light is reduced in the early morning or late evening or when the clouds block the light, the temperature inside the device decreases, the deformation plate 10 returns to its initial state, drives the lifting ring 9 upward, and through transmission, closes the sealing plate 3, forming a heat preservation cavity and switching to the focusing mode.

[0045] It should be noted in the above scheme that the material of the deformation plate 10 can be a nickel-titanium alloy, or it can be selected from the existing homogeneous alloys according to the actual situation.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency solar thermal power plant collector device that combines high-efficiency light concentration and heat dissipation, comprising a collector frame (1), characterized in that: The heat collection frame (1) is fixedly installed on the top of the external heat collection tower. A ring of light-transmitting glass (2) is fixedly connected to the outside of the heat collection frame (1). A cross-shaped frame (104) is fixedly connected to the bottom of the inner cavity of the heat collection frame (1). A heat collection tube body (4) located on the concentrating line is fixedly connected to the top of the cross-shaped frame (104). An auxiliary component is provided on the top of the heat collection frame (1).

2. The solar thermal power plant collector device for high-efficiency solar thermal power generation with synergistic concentrating and dissipation as described in claim 1, characterized in that: The auxiliary component includes a hemispherical cover (101) located at the top of the heat collection rack (1). Multiple sealing grooves (102) are equidistantly provided on the arc surface of the hemispherical cover (101). Each sealing groove (102) is rotatably connected to a sealing plate (3) adapted to it.

3. The solar thermal power plant collector device for high-efficiency solar thermal power generation with synergistic concentrating and dissipation as described in claim 2, characterized in that: Multiple heat dissipation arc-shaped fins (301) are fixedly connected at equal intervals on the outer surface of each sealing plate (3), and a light-concentrating arc-shaped glass (302) is fixedly connected on the side of the sealing plate (3) facing the heat collection tube body (4).

4. The solar thermal power plant collector device for high-efficiency solar thermal power generation with synergistic concentrating and dissipation as described in claim 3, characterized in that: A top plate (103) is fixedly connected to the top of the inner cavity of the hemispherical cover (101), a fixing ring (5) is fixedly connected to the bottom of the top plate (103), a plurality of deformation plates (10) are fixedly connected to the top of the fixing ring (5) at equal intervals, and a lifting ring (9) is fixedly connected to the top of the plurality of deformation plates (10).

5. The solar thermal power plant collector device for high-efficiency solar thermal power generation with synergistic concentrating and dissipation as described in claim 4, characterized in that: The deformation plate (10) corresponds to the sealing plate (3) one by one. The deformation plate (10) has a weakening groove (1001) on the outside. The weakening groove (1001) has a groove peak near the center of the deformation plate (10).

6. The solar thermal power plant collector device for high-efficiency solar thermal power generation with synergistic concentrating and dissipation as described in claim 5, characterized in that: The top of the inner cavity of the heat collection rack (1) is provided with multiple sets of driving components, and a set of driving components is provided between each set of deformation plate (10) and sealing plate (3).

7. The solar thermal power plant collector device for high-efficiency solar thermal power generation with synergistic concentrating and dissipation as described in claim 6, characterized in that: Both ends of each sealing plate (3) are rotatably connected to the sealing groove (102) via a rotating shaft (303). A connecting bevel gear (6) is fixedly connected to the top of the rotating shaft (303) located at the top of the sealing plate (3). Multiple transmission bevel gears (7) that mesh with each connecting bevel gear (6) are rotatably connected to the top of the inner cavity of the heat collection rack (1).

8. The solar thermal power plant collector device for high-efficiency solar thermal power generation with synergistic concentrating and dissipation as described in claim 7, characterized in that: The inner cavity of the heat collection rack (1) facing the lifting ring (9) is rotatably connected to a transmission wheel (8) that corresponds one-to-one with the deformation plate (10) and the sealing plate (3). One side of the transmission wheel (8) is provided with a first mating bevel tooth (801) that meshes with the transmission bevel gear (7).

9. The solar thermal power plant collector device for high-efficiency solar thermal power generation with synergistic concentrating and dissipation as described in claim 8, characterized in that: Each lifting ring (9) has a connecting plate (901) fixedly connected to one side facing each transmission wheel (8), and each connecting plate (901) has a helical tooth plate (902) fixedly connected to its bottom. The contact surface between the transmission wheel (8) and the helical tooth plate (902) is provided with a second mating bevel tooth (802) that meshes with the helical tooth plate (902).

10. The solar thermal power plant collector device for high-efficiency solar thermal power generation with synergistic concentrating and dissipation as described in claim 9, characterized in that: The two sides of the bottom end of the heat collection tube body (4) are respectively fixedly connected to a medium input pipe (401) and a medium output pipe (402).

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