High-concentration full-spectrum solar energy utilization system and method

Abstract

The invention belongs to the technical field of solar energy utilization, and relates to a high-concentration full-spectrum solar energy utilization system and method. Light rays vertically irradiate the Fresnel lens condensation unit through adjustment, and the focus of the condensed light rays is located on the vacuum glass heat collection tube. Specifically, the center Fresnel lens focuses large-area sunlight to the vacuum glass heat collecting tube, the splicing Fresnel lens focuses the large-area sunlight to the composite parabolic condensers on the two sides, and the composite parabolic condensers on the two sides reflect light rays and penetrate through the second light gathering channel to be gathered on the vacuum glass heat collecting tube. The Fresnel lens condensation unit focuses large-area sunlight to the vacuum glass heat collection tube, the light intensity is remarkably improved, and a high-temperature heat source is provided for photo-thermal conversion. After the Fresnel lens is transversely spliced and widened, the amount of light irradiated to the heat collection module and the photovoltaic power generation module is increased, and therefore the overall heat collection power of the system is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of solar energy utilization and relates to a high-power concentration full-spectrum solar energy utilization system and method. Background Art

[0002] As an inexhaustible clean energy, solar energy plays a vital role in addressing the global energy crisis and environmental pollution.

[0003] The development of full-spectrum solar energy technology aims to overcome the limitations of traditional solar energy utilization methods. By using spectroscopic methods to precisely separate the different wavelengths of the solar spectrum and match them to the most appropriate energy conversion method, the technology maximizes the energy utilization of the solar spectrum. This technology not only focuses on photoelectric conversion in the visible light band, but also fully utilizes thermal energy in the infrared band. By leveraging multiple energy sources, it improves the overall efficiency of solar energy utilization and opens up new avenues for the efficient and comprehensive utilization of solar energy.

[0004] Frequency-division synergistic power generation technology is a typical application of full-spectrum solar energy utilization. It utilizes a frequency-division fluid to combine visible light for photovoltaic power generation and infrared light for high-temperature heat collection, resulting in a high overall system efficiency. Fresnel lenses, with their lightweight, low-cost advantages, hold great potential for application in frequency-division synergistic power generation.

[0005] However, due to the limitations of existing processing technology, the Fresnel lens has a limited width, which in turn leads to a low focusing magnification of the lens, making it difficult to meet the needs of high-density photothermal technology. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-power concentration full-spectrum solar energy utilization system and method to solve the technical problem that the Fresnel lens has a limited lens width due to the limitations of existing processing technology, which in turn leads to a low lens concentration factor and is difficult to meet the high-density photothermal requirements.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention discloses a high-power concentration full-spectrum solar energy utilization system, comprising: A Fresnel lens focusing unit includes a central Fresnel lens and two spliced ​​Fresnel lenses, wherein the two spliced ​​Fresnel lenses are located on both sides of the central Fresnel lens; A compound parabolic concentrator unit includes a central compound parabolic concentrator and two double-sided compound parabolic concentrators, the two double-sided compound parabolic concentrators being located on either side of the central compound parabolic concentrator. The central compound parabolic concentrator is provided with a first concentrating channel and two second concentrating channels, the two second concentrating channels being located on either side of the first concentrating channel, and the first concentrating channel being provided with an evacuated glass heat collecting tube. The central Fresnel lens is located directly above the central compound parabolic concentrator, and the spliced ​​Fresnel lenses are located directly above the compound parabolic concentrators on both sides; The light reflected by the compound parabolic concentrators on both sides passes through the second concentrating channel and converges on the vacuum glass heat collecting tube; When light is vertically irradiated on the Fresnel lens focusing unit, the focus of the converged light is located on the vacuum glass heat collecting tube.

[0008] Furthermore, the central compound parabolic concentrator includes two upper paraboloids, two middle paraboloids and two lower paraboloids, each of the upper paraboloids and each of the lower paraboloids is provided with a middle parabola, the lower parabola is located between the middle parabola and the photovoltaic power generation unit, the upper parabola and the middle parabola are located on the same parabola, a second focusing channel is formed between the upper parabola and the middle parabola, and a first focusing channel is formed between the two middle paraboloids.

[0009] Furthermore, it also includes a photovoltaic power generation unit, which is located below the vacuum glass heat collecting tube.

[0010] Furthermore, the Fresnel lens focusing unit, the photovoltaic power generation unit and the compound parabolic focusing unit are fixed as a whole through a supporting steel frame, the supporting frame is rotatably connected to a supporting seat, and the vacuum glass heat collecting tube is movably installed on the supporting steel frame.

[0011] Furthermore, the vacuum glass heat collecting tube is a double-layer vacuum glass tube.

[0012] Furthermore, the photovoltaic power generation unit is a concave structure formed by splicing a plurality of photovoltaic panels, and the opening of the photovoltaic power generation unit of the concave structure faces the first focusing channel.

[0013] Furthermore, it also includes a frequency-divided fluid storage and heat exchange unit and a circulation pump, the outlet of the frequency-divided fluid storage and heat exchange unit is connected to the inlet of the circulation pump, the outlet of the circulation pump is connected to the inlet of the vacuum glass heat collecting tube, and the outlet of the vacuum glass heat collecting tube is connected to the inlet of the frequency-divided fluid storage and heat exchange unit.

[0014] Furthermore, the frequency-dividing fluid storage and heat exchange unit includes a frequency-dividing fluid storage tank and a heat exchanger, the heat exchanger is arranged on the frequency-dividing fluid storage and heat exchange unit, and the outlet of the vacuum glass heat collecting tube is connected to the inlet of the circulation pump through the frequency-dividing fluid storage tank; The heat exchanger is a spiral tube structure sleeved on the frequency division fluid storage tank.

[0015] Furthermore, it also includes a light-chasing control unit, which includes a photoresistor sensor, a light-chasing control system and a light-chasing driving device; The light-chasing control system is electrically connected to the photoresistor sensor and the light-chasing driving device, and the output end of the light-chasing driving device is connected to the whole consisting of the Fresnel lens focusing unit, the photovoltaic power generation unit and the compound parabolic focusing unit; The photoresistor sensor is used to detect the sun's position and light intensity in real time, and transmit the sun's position and light intensity signals to the light-chasing control system. The light-chasing control system is used to control the light-chasing drive device according to the sun's position and light intensity signals, and adjust the angle of the Fresnel lens focusing unit in real time so that the light shines vertically on the Fresnel lens focusing unit.

[0016] Based on the above system, the present invention also discloses a method for utilizing high-power concentrated full-spectrum solar energy, comprising the following steps: The position of the Fresnel lens focusing unit is adjusted so that the light irradiates the Fresnel lens focusing unit vertically.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The Fresnel lens focusing unit and the compound parabolic concentrator unit of the present invention are integrally formed and can rotate around the central axis of the vacuum glass heat collecting tube. By adjusting, the light can be vertically irradiated on the Fresnel lens focusing unit, and the focus of the concentrated light is located on the vacuum glass heat collecting tube. Specifically, the central Fresnel lens focuses a large area of ​​sunlight onto the vacuum glass heat collecting tube, and the spliced ​​Fresnel lens focuses a large area of ​​sunlight onto the compound parabolic concentrators on both sides. The compound parabolic concentrators on both sides then reflect the light and pass through the second concentrating channel to converge on the vacuum glass heat collecting tube. The Fresnel lens concentrator unit focuses a large area of ​​sunlight onto the vacuum glass heat collecting tube, significantly increasing the light intensity and providing a high-temperature heat source for light-to-heat conversion. The compound parabolic concentrator unit is used for secondary focusing and optimized light distribution to improve system efficiency. After the Fresnel lenses are laterally spliced ​​and widened in the present invention, part of the sunlight passing through the central Fresnel lens will be directly focused on the vacuum glass heat collecting tube. The light passing through the spliced ​​Fresnel lenses will then be reflected to the center of the vacuum glass heat collecting tube through the two side compound parabolic concentrators arranged below, increasing the amount of light irradiating the heat collecting module and the photovoltaic power generation module, thereby improving the overall heat collection power of the system.

[0018] The photovoltaic power generation unit of the present invention is located below the vacuum glass heat collecting tube and is used to receive visible light passing through the vacuum glass heat collecting tube or light of a specific wavelength band split by the compound parabolic focusing unit to generate photovoltaic power.

[0019] The Fresnel lens focusing unit, the photovoltaic power generation unit and the bidirectional compound parabolic concentrator of the present invention are fixedly connected as a whole via a support frame, and the vacuum glass heat collecting tube is movably connected to the support frame, so that the support frame can rotate around the vacuum glass heat collecting tube, thereby facilitating real-time adjustment of the position of the Fresnel lens focusing unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 Schematic diagram of the structure of the heat collection part of an embodiment of the present invention; Figure 3 : is a principle diagram of the optical path of the heat collection part of an embodiment of the present invention, wherein a is the optical path diagram when the compound parabolic concentrators on both sides are not set, and b is the optical path diagram after the compound parabolic concentrators on both sides are set.

[0021] Among them: 1. Fresnel lens focusing unit; 101. Central Fresnel lens; 102. Spliced ​​Fresnel lens; 2. Vacuum glass collecting tube; 3. Photovoltaic power generation unit; 4. Compound parabolic focusing unit; 41. Central compound parabolic concentrator; 42. Compound parabolic concentrators on both sides; 411. Upper parabola; 412. Middle parabola; 413. Lower parabola; 414. First focusing channel; 415. Second focusing channel; 5. Frequency division fluid storage and heat exchange unit; 51. Frequency division fluid storage tank; 52. Heat exchanger; 6. Circulation pump; 7. Light chasing control unit; 71. Photoresistor sensor; 72. Light chasing control system; 73. Light chasing drive device. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first," "second," and the like in the description of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatus.

[0024] The present invention is described in further detail below with reference to the accompanying drawings: Example 1: See also Figure 1 and Figure 2 , this embodiment discloses a high-power concentration full-spectrum solar energy utilization system, comprising: a Fresnel lens focusing unit 1 and a compound parabolic focusing unit 4; See also Figure 2 The Fresnel lens concentrating unit 1 comprises a central Fresnel lens 101 and two spliced ​​Fresnel lenses 102, located on either side of the central Fresnel lens 101. The Fresnel lens concentrating unit 1 focuses a large area of ​​sunlight onto the evacuated glass collector tube 2, significantly increasing light intensity and providing a high-temperature heat source for photothermal conversion. The compound parabolic concentrating unit 4 is used for secondary focusing and optimized light distribution, improving system efficiency.

[0025] See also Figure 2 The compound parabolic concentrator unit 4 includes a central compound parabolic concentrator 41 and two side compound parabolic concentrators 42. The two side compound parabolic concentrators 42 are located on both sides of the central compound parabolic concentrator 41. The central compound parabolic concentrator 41 is provided with a first focusing channel 414 and two second focusing channels 415. The two second focusing channels 415 are located on both sides of the first focusing channel 414. The first focusing channel 414 is provided with a vacuum glass heat collecting tube 2.

[0026] The central Fresnel lens 101 is located directly above the central compound parabolic concentrator 41 and focuses a large area of ​​sunlight onto the vacuum glass collector tube 2. The spliced ​​Fresnel lens 102 is located directly above the compound parabolic concentrators 42 on both sides and focuses a large area of ​​sunlight onto the compound parabolic concentrators 42 on both sides.

[0027] The light reflected by the compound parabolic concentrators 42 on both sides passes through the second concentrating channel 415 and converges on the vacuum glass heat collecting tube 2. That is, the scattered light or edge light reflected by the compound parabolic concentrators 42 on both sides is supplemented and converged on the vacuum glass heat collecting tube 2 through the second concentrating channel 415, thereby expanding the light energy collection range. Figure 3 , a is the optical path diagram when the compound parabolic concentrators on both sides are not set, and b is the optical path diagram after the compound parabolic concentrators on both sides are set.

[0028] When light strikes the Fresnel lens focusing unit 1 perpendicularly, the focal point of the converged light is located on the vacuum glass heat collecting tube 2. The entire structure consisting of the Fresnel lens focusing unit 1 and the compound parabolic focusing unit 4 can rotate about the central axis of the vacuum glass heat collecting tube 2 to adjust the angle of the Fresnel lens focusing unit 1 to its optimal position.

[0029] After the present invention performs transverse splicing and widening on the Fresnel lens 1, part of the sunlight passing through the central Fresnel lens 101 will be directly focused on the vacuum glass heat collecting tube 2, and the light passing through the spliced ​​Fresnel lens 102 will be reflected to the center of the vacuum glass heat collecting tube 2 through the two-side compound parabolic concentrators 42 arranged below, thereby increasing the amount of light irradiated to the heat collecting module and the photovoltaic power generation module, thereby improving the overall heat collection power of the system.

[0030] See also Figure 2 In an embodiment of the present invention, the central compound parabolic concentrator 41 includes two upper paraboloids 411, two middle paraboloids 412 and two lower paraboloids 413. A middle parabola 412 is provided between each upper parabola 411 and each lower parabola 413. The lower parabola 413 is located between the middle parabola 412 and the photovoltaic power generation unit 3. The upper parabola 411 and the middle parabola 412 are located on the same parabola. A second focusing channel 415 is formed between the upper parabola 411 and the middle parabola 412, and a first focusing channel 414 is formed between the two middle paraboloids 412.

[0031] See also Figure 2 In an embodiment of the present invention, a photovoltaic power generation unit 3 is further included. The photovoltaic power generation unit 3 is located below the vacuum glass heat collecting tube 2. The photovoltaic power generation unit 3 is used to receive visible light passing through the vacuum glass heat collecting tube 2, or light of a specific wavelength band after being split by the compound parabolic concentrating unit 4, to perform photovoltaic power generation.

[0032] In an embodiment of the present invention, the Fresnel lens focusing unit 1, the photovoltaic power generation unit 3 and the compound parabolic focusing unit 4 are fixed as a whole by a supporting steel frame. The supporting frame is rotatably connected to a support seat. The vacuum glass heat collecting tube 2 is movably inserted into the supporting steel frame. The vacuum glass heat collecting tube 2 is movably connected to the supporting frame, so that the supporting frame can rotate around the vacuum glass heat collecting tube, thereby facilitating real-time adjustment of the position of the Fresnel lens focusing unit.

[0033] In the embodiment of the present invention, the vacuum glass heat collecting tube 2 is a double-layer vacuum glass tube to reduce the heat dissipation loss of the heat collecting tube.

[0034] In the embodiment of the present invention, the photovoltaic power generation unit 3 is a concave structure formed by splicing a plurality of photovoltaic panels, and the opening of the photovoltaic power generation unit 3 of the concave structure faces the first focusing channel 414 .

[0035] See also Figure 1 In an embodiment of the present invention, a frequency-dividing fluid storage and heat exchange unit 5 and a circulation pump 6 are also included. The outlet of the frequency-dividing fluid storage and heat exchange unit 5 is connected to the inlet of the circulation pump 6, the outlet of the circulation pump 6 is connected to the inlet of the vacuum glass heat collecting tube 2, and the outlet of the vacuum glass heat collecting tube 2 is connected to the inlet of the frequency-dividing fluid storage and heat exchange unit 5.

[0036] See also Figure 1 In the embodiment of the present invention, the frequency-dividing fluid storage and heat exchange unit 5 includes a frequency-dividing fluid storage tank 5-1 and a heat exchanger 5-2. The heat exchanger 5-2 is arranged on the frequency-dividing fluid storage and heat exchange unit 5. The outlet of the vacuum glass heat collecting tube 2 is connected to the inlet of the circulation pump 6 through the frequency-dividing fluid storage tank 5-1. The heat exchanger 5-2 is a spiral tube structure mounted on the frequency-dividing fluid storage tank 5-1.

[0037] In the embodiment of the present invention, a light-chasing control unit is further included, and the light-chasing control unit includes a photoresistor sensor 71, a light-chasing control system 72 and a light-chasing driving device 73; The light-chasing control system 72 is electrically connected to the photoresistor sensor 71 and the light-chasing driving device 73. The output end of the light-chasing driving device 73 is connected to the whole composed of the Fresnel lens focusing unit 1, the photovoltaic power generation unit 3 and the compound parabolic focusing unit 4. The photoresistor sensor 71 is used to detect the sun's position and light intensity in real time, and transmit the sun's position and light intensity signals to the light-chasing control system 72. The light-chasing control system 72 is used to control the light-chasing drive device 73 according to the sun's position and light intensity signals, and adjust the angle of the Fresnel lens focusing unit 1 in real time so that the light shines vertically on the Fresnel lens focusing unit 1.

[0038] Based on the above system, the present invention also discloses a method for utilizing high-power concentrated full-spectrum solar energy, comprising the following steps: The position of the Fresnel lens focusing unit 1 is adjusted so that the light irradiates the Fresnel lens focusing unit 1 vertically.

[0039] In this invention, the compound parabolic concentrator (CPC) is a non-imaging concentrator designed based on edge optics. This concentrating structure can effectively collect obliquely incident sunlight, reducing light loss and achieving the maximum theoretical concentration ratio. The multi-point arrangement of the CPC concentrating structure is expected to further expand the width of the Fresnel lens, increase the focusing factor, and increase the output power of the Fresnel-type frequency-dividing cooperative power generation system, laying the foundation for large-scale industrial applications. Furthermore, due to the increased output power of a single system module, the number of system modules can be appropriately reduced when high-power industrial needs are met, significantly reducing the system's investment cost.

[0040] Example 2: See also Figure 1 and Figure 2 This embodiment discloses a high-power concentration full-spectrum solar energy utilization system, which integrates a multi-site compound parabolic concentrating structure with a Fresnel-type frequency-dividing cooperative power generation system, including a Fresnel lens concentrating unit 1, a vacuum glass collecting tube 2, a photovoltaic power generation unit 3, a compound parabolic concentrating unit 4, a frequency-dividing fluid storage and heat exchange unit 5, a circulating pump 6, a tracking control unit 7, a supporting steel frame 8 and a steel frame base 9.

[0041] In this embodiment of the present invention, the Fresnel lens concentrating unit 1 is located directly above the evacuated glass heat collecting tube 2, the photovoltaic power generation unit 3 is located directly below the evacuated glass heat collecting tube 2, and the compound parabolic concentrating units 4 are located on both sides of the evacuated glass heat collecting tube 2. The Fresnel lens concentrating unit 1, photovoltaic power generation unit 3, and compound parabolic concentrating unit 4 are combined into a single unit via a supporting steel frame 8. This unit can rotate around the central axis of the evacuated glass heat collecting tube 2 to adjust the angle of the Fresnel lens concentrating unit 1 for optimal positioning.

[0042] In this embodiment of the present invention, the Fresnel lens focusing unit 1 is used to initially focus light and includes a central Fresnel lens 101 and a spliced ​​Fresnel lens 102. The central Fresnel lens 101 ensures that its focal point is located at the center of the vacuum glass collector tube 2 when the sun is incident vertically. The spliced ​​Fresnel lens 102 is used to widen the width of the Fresnel lens. It is composed of a single Fresnel lens, split into two pieces, and then spliced ​​to the ends of the central Fresnel lens 101.

[0043] In the embodiment of the present invention, the vacuum glass heat collecting tube 2 is composed of a double-layer glass tube, and a vacuum treatment needs to be performed between the inner and outer glass tubes to reduce the heat dissipation loss of the heat collecting tube.

[0044] In the embodiment of the present invention, the photovoltaic power generation unit 3 is composed of three photovoltaic power generation panels, and the photovoltaic power generation panels on both sides are respectively located at the two ends of the middle photovoltaic power generation panel and the included angle is 120°.

[0045] In this embodiment of the present invention, the compound parabolic concentrator unit 4 is composed of multiple pairs of compound parabolic concentrators located on both sides of the vacuum glass collector tube 2, including a central compound parabolic concentrator 41 and two side compound parabolic concentrators 42. The central compound parabolic concentrator 41 includes an upper parabola 411, a middle parabola 412, and a lower parabola 413. The two side compound parabolic concentrators 42 are located below the spliced ​​Fresnel lens 102.

[0046] In the embodiment of the present invention, the upper parabola 411 and the middle parabola 412 of the central compound parabolic concentrator 41 are used to effectively collect sunlight that is obliquely incident and passes through the Fresnel lens focusing unit 1, so that the light is refocused on the center of the vacuum glass collector tube 2, thereby reducing light loss and increasing the amount of heat collected.

[0047] In the embodiment of the present invention, the lower parabola 413 of the central compound parabolic concentrator 41 is used to reflect the light passing through the vacuum glass collecting tube 2 and its surroundings as completely as possible to the photovoltaic power generation unit 3, so as to reduce light loss and increase photovoltaic power generation.

[0048] In the embodiment of the present invention, the double-sided compound parabolic concentrator 42 is used to reflect and collect the sunlight passing through the spliced ​​Fresnel lens 102 to the center of the vacuum glass heat collecting tube 2 .

[0049] In the embodiment of the present invention, the double-sided compound parabolic concentrator 42 can solve the problem of the spliced ​​Fresnel lens 102 focusing light downward, increase the focusing magnification of the Fresnel lens focusing unit 1, improve the output efficiency of a single system module, and reduce the system investment cost under high-power industrial requirements.

[0050] In an embodiment of the present invention, the frequency-dividing fluid storage and heat exchange unit 5 includes a frequency-dividing fluid storage tank 51 and a heat exchanger 52. The frequency-dividing fluid storage tank 51 is used to accommodate the frequency-dividing fluid, and the heat exchanger 52 is used to transfer the heat of the frequency-dividing fluid to heat users such as industrial and living parks.

[0051] In an embodiment of the present invention, the inlet of the vacuum glass heat collecting tube 2 is connected to the outlet of the circulation pump 6, the inlet of the circulation pump 6 is connected to the outlet of the frequency division fluid storage tank 51, and the inlet of the frequency division fluid storage tank 51 is connected to the outlet of the vacuum glass heat collecting tube 2, thereby forming a frequency division fluid circulation loop.

[0052] In this embodiment of the present invention, the tracking control unit 7 includes a photoresistor sensor 71, a tracking control system 7-2, and a tracking drive device 7-3. The photoresistor sensor 71 is used to detect the sun's position and light intensity differences in real time, and transmits the signals to the tracking control system 7-2 for analysis and control. The tracking drive device 7-3 uses a servo motor and supporting mechanical structure to adjust the angle of the Fresnel lens focusing unit 1 to maintain its optimal position.

[0053] In summary, compared with the prior art, the present invention has the following beneficial effects: 1. After the Fresnel lens is horizontally spliced ​​and widened, part of the sunlight passing through the lens will be focused below the heat collecting tube. This technology arranges a CPC concentrating structure below the spliced ​​lens to reflect the sunlight passing through the spliced ​​lens to the center of the heat collecting tube, increasing the amount of light irradiating the heat collecting module and photovoltaic power generation module, thereby improving the overall heat collection and power generation power of the system. 2. This technology can further expand the width of the Fresnel lens and improve the output efficiency of a single system module, thereby reducing the system investment cost under high-power industrial demand.

[0054] The present invention proposes for the first time to widen the lens width by splicing half a Fresnel lens on both sides to increase the focusing multiple; The present invention designs a Fresnel-type frequency-dividing cooperative power generation device with a multi-site integrated CPC focusing structure, which can solve the problem of limited Fresnel lens width, improve the output efficiency of a single system module, and significantly reduce the investment cost of the system under high-power industrial demand.

[0055] The above content is only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. A high-power concentration full-spectrum solar energy utilization system, characterized in that: include: A Fresnel lens focusing unit (1) comprises a central Fresnel lens (101) and two spliced ​​Fresnel lenses (102), wherein the two spliced ​​Fresnel lenses (102) are located on both sides of the central Fresnel lens (101); A compound parabolic concentrator unit (4) comprises a central compound parabolic concentrator (41) and two side compound parabolic concentrators (42), wherein the two side compound parabolic concentrators (42) are located on both sides of the central compound parabolic concentrator (41), a first concentrating channel (414) and two second concentrating channels (415) are provided on the central compound parabolic concentrator (41), the two second concentrating channels (415) are located on both sides of the first concentrating channel (414), and a vacuum glass heat collecting tube (2) is arranged in the first concentrating channel (414); The central Fresnel lens (101) is located directly above the central compound parabolic concentrator (41), and the spliced ​​Fresnel lens (102) is located directly above the compound parabolic concentrators (42) on both sides; The light reflected by the compound parabolic concentrators (42) on both sides passes through the second concentrating channel (415) and converges on the vacuum glass heat collecting tube (2); When light vertically irradiates the Fresnel lens focusing unit (1), the focus of the converged light is located on the vacuum glass heat collecting tube (2).

2. A high-power concentration full-spectrum solar energy utilization system according to claim 1, characterized in that: The central compound parabolic concentrator (41) comprises two upper paraboloids (411), two middle paraboloids (412) and two lower paraboloids (413), wherein a middle parabola (412) is provided between each upper parabola (411) and each lower parabola (413), and the lower parabola (413) is located between the middle parabola (412) and the photovoltaic power generation unit (3). The upper parabola (411) and the middle parabola (412) are located on the same parabola, a second focusing channel (415) is formed between the upper parabola (411) and the middle parabola (412), and a first focusing channel (414) is formed between the two middle paraboloids (412).

3. The high-concentration full-spectrum solar energy utilization system according to claim 1, characterized in that: It also includes a photovoltaic power generation unit (3), which is located below the vacuum glass heat collection tube (2).

4. The high-concentration full-spectrum solar energy utilization system according to claim 4, characterized in that: The Fresnel lens focusing unit (1), the photovoltaic power generation unit (3) and the compound parabolic focusing unit (4) are fixed as a whole via a supporting steel frame, the supporting frame is rotatably connected to a supporting seat, and the vacuum glass heat collecting tube (2) is movably installed on the supporting steel frame.

5. The high-concentration full-spectrum solar energy utilization system according to claim 1, characterized in that: The vacuum glass heat collecting tube (2) is a double-layer vacuum glass tube.

6. The high-concentration full-spectrum solar energy utilization system according to claim 1, characterized in that: The photovoltaic power generation unit (3) is a concave structure formed by splicing a plurality of photovoltaic panels, and the opening of the photovoltaic power generation unit (3) of the concave structure faces the first focusing channel (414).

7. The high-concentration full-spectrum solar energy utilization system according to claim 1, characterized in that: It also includes a frequency-dividing fluid storage and heat exchange unit (5) and a circulation pump (6), wherein the outlet of the frequency-dividing fluid storage and heat exchange unit (5) is connected to the inlet of the circulation pump (6), the outlet of the circulation pump (6) is connected to the inlet of the vacuum glass heat collecting tube (2), and the outlet of the vacuum glass heat collecting tube (2) is connected to the inlet of the frequency-dividing fluid storage and heat exchange unit (5).

8. The high-concentration full-spectrum solar energy utilization system according to claim 7, characterized in that: The frequency-dividing fluid storage and heat exchange unit (5) comprises a frequency-dividing fluid storage tank (5-1) and a heat exchanger (5-2), wherein the heat exchanger (5-2) is arranged on the frequency-dividing fluid storage and heat exchange unit (5), and the outlet of the vacuum glass heat collecting tube (2) is connected to the inlet of the circulation pump (6) through the frequency-dividing fluid storage tank (5-1); The heat exchanger (5-2) is a spiral tube structure sleeved on the frequency-dividing fluid storage tank (5-1).

9. The high-concentration full-spectrum solar energy utilization system according to claim 1, characterized in that: It also includes a light-chasing control unit, which includes a photoresistor sensor (71), a light-chasing control system (72), and a light-chasing driving device (73); The light-chasing control system (72) is electrically connected to the photoresistor sensor (71) and the light-chasing driving device (73), and the output end of the light-chasing driving device (73) is connected to the whole consisting of the Fresnel lens focusing unit (1), the photovoltaic power generation unit (3) and the compound parabolic focusing unit (4); The photoresistor sensor (71) is used to detect the sun's position and light intensity in real time, and transmit the sun's position and light intensity signals to a light-chasing control system (72). The light-chasing control system (72) is used to control a light-chasing drive device (73) according to the sun's position and light intensity signals, and adjust the angle of the Fresnel lens focusing unit (1) in real time so that light vertically illuminates the Fresnel lens focusing unit (1).

10. A high-concentration full-spectrum solar energy utilization method, based on the high-concentration full-spectrum solar energy utilization system according to any one of claims 1 to 9, characterized in that: The following steps are involved: The position of the Fresnel lens focusing unit (1) is adjusted so that the light irradiates the Fresnel lens focusing unit (1) vertically.

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