Concentrating solar collector

Abstract

The present invention relates to the technical field of solar energy utilization, and provides a concentrating and heat-collecting device, comprising a concentrator, a heat-collecting component and a translucent reflective structure; the concentrator has a pair of first reflecting surfaces, a second reflecting surface is connected between the side edges of the pair of first reflecting surfaces close to the focal spot position of the concentrator, and a light entrance is formed between the side edges of the pair of first reflecting surfaces away from the second reflecting surfaces; the heat-collecting component is arranged at the focal spot position of the concentrator; the translucent reflective structure is arranged at the light entrance; the present invention provides a concentrating and heat-collecting device, in which a part of the introduced incident light directly acts on the heat-collecting component, and the other part is reflected by the reflection area surrounded by the first reflecting surface and the second reflecting surface, and the formed reflected light acts on the heat-collecting component, and the translucent reflective structure and the reflecting surfaces can reflect the escaped light that is not received by the heat-collecting component again, so that the escaped light can be reflected to the heat-collecting component, thereby realizing the reuse of the escaped light and improving the light-to-heat conversion efficiency of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of solar energy utilization, and in particular to a concentrating and heat collecting device. Background Art

[0002] Solar energy is a clean, pollution-free, renewable energy source with vast reserves, making it a crucial technological solution to future energy shortages and environmental challenges. However, due to its inherent shortcomings of low energy density, dispersion, and intermittency, harnessing it efficiently and cost-effectively remains a critical issue.

[0003] As a capture and conversion device for efficiently utilizing solar energy, traditional solar concentrating and collecting devices, during use, allow incident light to illuminate the light inlet, so that its collector can receive direct incident light and reflected light reflected by the reflective surface. However, if the reflected light does not converge on the photothermal conversion receiver of the collector, it is invalid light, and the invalid light will escape from the concentrating and collecting device. In this way, sunlight cannot be efficiently utilized, resulting in low photothermal conversion efficiency of the concentrating and collecting device and energy loss. Summary of the Invention

[0004] The present invention provides a concentrating and heat-collecting device to solve the defects of the prior art concentrating and heat-collecting devices in that a large amount of light escapes and the light-to-heat conversion efficiency is low during use, thereby achieving the reuse of the escaped light, increasing the amount of light received by the collector, and making efficient use of sunlight.

[0005] The present invention provides a light-collecting and heat-collecting device, comprising:

[0006] A concentrator having a pair of first reflecting surfaces, wherein a second reflecting surface is connected between sides of the pair of first reflecting surfaces close to the focal spot of the concentrator, and a light entrance is formed between sides of the pair of first reflecting surfaces away from the second reflecting surface;

[0007] A heat collecting assembly is arranged at the focal spot position of the concentrator;

[0008] A light-transmitting and reflecting structure is provided at the light entrance;

[0009] in,

[0010] The incident light is reflected by a pair of the first reflecting surface and the second reflecting surface and converges onto the heat collecting assembly;

[0011] Incident light can pass through the light-transmitting reflective structure, and the light-transmitting reflective structure can reflect the escaping light to the heat collection assembly.

[0012] According to a concentrating and heat collecting device provided by the present invention, a first photovoltaic assembly and a second photovoltaic assembly are sequentially provided between a pair of the first reflecting surfaces, the first photovoltaic assembly and the second photovoltaic assembly are both electrically connected to a sun tracking controller, the sun tracking controller is electrically connected to a driving member, and the driving member is drivingly connected to the concentrator;

[0013] Among them, the sun tracking controller is used to compare the output electrical power of the first photovoltaic component and the second photovoltaic component, and drive the driving component to drive the concentrator to rotate toward the side with smaller output electrical power until the output electrical power of the first photovoltaic component and the second photovoltaic component are consistent.

[0014] According to a light-collecting and heat-collecting device provided by the present invention, the heat-collecting assembly comprises:

[0015] A single-layer glass tube is arranged at the focal spot position of the concentrator;

[0016] A light-heat conversion receiver is arranged inside the single-layer glass tube;

[0017] in,

[0018] The single-layer glass tube is connected to a fan, which is used to drive the air flow inside the single-layer glass tube and exchange heat with the photothermal conversion receiver to generate hot air output;

[0019] The wind turbine is electrically connected to a third photovoltaic component, and the third photovoltaic component is arranged between a pair of the first reflecting surfaces.

[0020] According to a concentrating and heat collecting device provided by the present invention, the third photovoltaic component is arranged at the upper end of a pair of first reflecting surfaces, the first photovoltaic component and the second photovoltaic component are arranged at the lower end of a pair of first reflecting surfaces, and the first photovoltaic component, the second photovoltaic component and the third photovoltaic component are all arranged at an angle to receive and reflect incident light and escaping light.

[0021] According to a light-concentrating and heat-collecting device provided by the present invention, the light-transmitting and reflective structure includes at least two layers of glass plates, and an air layer is provided between adjacent glass plates.

[0022] According to a concentrating and heat collecting device provided by the present invention, a first cavity is formed between the third photovoltaic assembly and the inner end surface of the concentrator closest to it, a second cavity is formed between the first photovoltaic assembly and the second photovoltaic assembly and the inner end surface of the concentrator closest to them, and an air channel is provided inside the second reflecting surface;

[0023] The air channel, the air interlayer, the first cavity and the second cavity are connected to form a closed air circulation channel.

[0024] According to a concentrating and heat collecting device provided by the present invention, the heat release ends of the first photovoltaic assembly and the second photovoltaic assembly face the second cavity, and the heat release end of the third photovoltaic assembly faces the first cavity.

[0025] According to a light-concentrating and heat-collecting device provided by the present invention, the light-heat conversion receiver is a spiral receiver, and the spiral receiver is arranged on a support frame, and the support frame is located inside the single-layer glass tube.

[0026] According to a concentrating and heat collecting device provided by the present invention, the first photovoltaic assembly and the second photovoltaic assembly are symmetrically arranged.

[0027] According to a light-concentrating and heat-collecting device provided by the present invention, the concentrator is a trough-type compound parabolic concentrator.

[0028] The present invention provides a concentrating and heat-collecting device, which introduces incident light through a light inlet. Part of the incident light directly acts on the heat-collecting component, and the other part is reflected by a reflection area surrounded by a first reflection surface and a second reflection surface. The formed reflected light acts on the heat-collecting component, and the light escaping that is not received by the heat-collecting component can be reflected again by utilizing the light-transmitting reflection structure and each reflection surface, so that the escaping light can be reflected to the heat-collecting component, thereby increasing the amount of light received by the heat-collecting component.

[0029] The present invention can recycle and reuse the escaped light that is not directly converted into heat by the heat collecting assembly, thereby achieving efficient utilization of the incident radiation and improving the light-to-heat conversion efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is an axonometric diagram of the light-collecting and heat-collecting device provided by the present invention;

[0032] Figure 2 is a cross-sectional view of the light-collecting and heat-collecting device provided by the present invention;

[0033] Figure 3 It is a structural schematic diagram of the concentrating and heat collecting device provided by the present invention;

[0034] Figure 4 It is a schematic structural diagram of the photothermal conversion receiver provided by the present invention.

[0035] Reference numerals:

[0036] 1: Concentrator; 2: Third photovoltaic module; 3: Light inlet; 4: Glass plate; 5: Air interlayer; 6: Air channel; 7: Single-layer glass tube; 8: Photothermal conversion receiver; 9: First photovoltaic module; 10: Second photovoltaic module; 11: Drive unit; 12: Fan; 13: Feed air; 14: Hot air; 15: Support frame. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0038] The following combination Figure 1-Figure 4 The concentrating and heat collecting device of the present invention is described.

[0039] This embodiment provides a concentrating and heat collecting device, including:

[0040] The concentrator 1 has a pair of first reflecting surfaces, a second reflecting surface is connected between the sides of the pair of first reflecting surfaces close to the focal spot of the concentrator 1, and a light entrance 3 is formed between the sides of the pair of first reflecting surfaces away from the second reflecting surface;

[0041] The heat collecting assembly is arranged at the focal spot position of the concentrator 1;

[0042] A light-transmitting and reflecting structure is provided at the light entrance 3;

[0043] in,

[0044] The incident light is reflected by a pair of first reflecting surfaces and a second reflecting surface and converges onto the heat collecting assembly;

[0045] Incident light can pass through the light-transmitting reflective structure, and the light-transmitting reflective structure can reflect the escaping light toward the heat collection assembly.

[0046] The concentrator 1 can be a structure consisting of a pair of first reflecting surfaces and a second reflecting surface, such as a trough concentrator structure. Each reflecting surface can be set to a flat surface or a curved surface, and the angle between each reflecting surface can be adjusted accordingly according to the actual method of introducing incident light.

[0047] Among them, the light-transmitting reflective structure can be a piece of one-way glass or a combination of multiple glass plates 4, both of which can allow the incident light to pass through the light-transmitting reflective structure to the inside of the concentrator 1, and at the same time can reflect the escaping light inside the concentrator 1. In addition, if the light-entering area is large, a glass cover can be used to block the concentrator 1 as a whole, which can further improve the utilization of the escaping light.

[0048] In this embodiment, the concentrator 1 is a trough-type compound parabolic concentrator, utilizing a pair of first reflective surfaces as its left and right concentrators, and a second reflective surface as its inner rear end concentrator. All three concentrators are treated with a total reflection coating to achieve an excellent light reflection effect. During use, incident light is introduced through the light inlet 3. Part of the incident light directly acts on the heat collection component, while the other part is reflected by the reflective area enclosed by the first and second reflective surfaces. The resulting reflected light acts on the heat collection component. Furthermore, the light escaping from the heat collection component that is not received by the heat collection component can be re-reflected by the light-transmitting reflective structure and each reflective surface, allowing the escaping light to be reflected back to the heat collection component, thereby increasing the amount of light received by the heat collection component.

[0049] In this embodiment, a first photovoltaic assembly 9 and a second photovoltaic assembly 10 are sequentially connected between a pair of first reflecting surfaces. The first photovoltaic assembly 9 and the second photovoltaic assembly 10 are both electrically connected to a sun tracking controller. The sun tracking controller is electrically connected to a driver 11. The driver 11 is connected to the concentrator. Optionally, the driver 11 is a rotating motor.

[0050] Among them, the sun tracking controller is used to compare the output electric power of the first photovoltaic component 9 and the second photovoltaic component 10, and drive the driving component 11 to drive the concentrator 1 to rotate toward the side with smaller output electric power until the output electric power of the first photovoltaic component 9 and the second photovoltaic component 10 are consistent.

[0051] In this embodiment, the first photovoltaic assembly 9 and the second photovoltaic assembly 10 are respectively arranged at the left and right ends and spliced ​​with each other. They can receive incident light and outgoing light, thereby enabling the first photovoltaic assembly 9 and the second photovoltaic assembly 10 to be in working state and output electrical power. They can also reflect the incident light. Affected by the change in the solar altitude angle and azimuth, the incident angle of the incident light is offset. When the sunlight received by either the first photovoltaic assembly 9 or the second photovoltaic assembly 10 is weak, the corresponding output electrical power will be smaller than the other. After comparison by the sun tracking controller, the sun tracking controller can enable the driving member 11 to drive the concentrator 1 to rotate toward the side with smaller output electrical power, so that the overall concentrator 1 achieves the effect of automatic sun tracking.

[0052] Optionally, the first photovoltaic assembly 9 and the second photovoltaic assembly 10 can be arranged symmetrically along the axis, so that the light received by the first photovoltaic assembly 9 and the second photovoltaic assembly 10 is relatively uniform, so that the driving member 11 can more accurately drive the concentrator 1 to realize the automatic tracking function.

[0053] In this embodiment, the heat collection assembly includes:

[0054] A single-layer glass tube 7 is arranged at the focal spot position of the concentrator 1;

[0055] The light-heat conversion receiver 8 is arranged inside the single-layer glass tube 7 and has a heat storage function;

[0056] in,

[0057] The single-layer glass tube 7 is connected to a fan 12, which is used to drive the air flow inside the single-layer glass tube 7 and exchange heat with the photothermal conversion receiver 8 to generate hot air 14 for output;

[0058] The wind turbine 12 is electrically connected to the third photovoltaic assembly 2 , and the third photovoltaic assembly 2 is disposed between a pair of first reflective surfaces.

[0059] In this embodiment, the third photovoltaic module 2 receives sunlight and outputs electrical power, which in turn powers a fan 12. This fan 12 draws in feed air 13 and delivers it into the single-layer glass tube 7, driving the air flow within the single-layer glass tube 7. This air then exchanges heat with the photothermal conversion receiver 8 to generate hot air 14 for output. Furthermore, the third photovoltaic module 2 also reflects light.

[0060] For the reflected light inside the concentrator 1, specifically, when the incident light enters the reflective surface of the concentrator 1 through the translucent reflective structure laid at the light inlet 3, it is reflected and converged to the photothermal conversion receiver 8 located at the focal spot position of the concentrator 1. The incident light that is not received by the photothermal conversion receiver 8 is reflected by the first photovoltaic component 9, the second photovoltaic component 10, the third photovoltaic component 2 and the reflective surface of the translucent reflective structure located inside the concentrator 1, and can be converged on the photothermal conversion receiver 8 again.

[0061] In the above implementation, photovoltaics and solar thermal are efficiently coupled and utilized, and the escaped light is received by each photovoltaic module to generate electricity to drive air flow and provide driving power for tracking the sun. The overall photoelectric conversion and reuse of the escaped light realizes the automatic sun tracking and heat exchange of the device, reduces the demand for external electric energy, and can operate independently without external energy supply.

[0062] Furthermore, the third photovoltaic assembly 2 is positioned above the pair of first reflective surfaces, while the first and second photovoltaic assemblies 9 and 10 are positioned below the pair of first reflective surfaces. The first, second, and third photovoltaic assemblies 9 and 10 are all tilted to receive and reflect incident and outgoing light. This arrangement provides driving energy for the device's photothermal conversion receiver 8 while maintaining a stable sun tracking function.

[0063] In this embodiment, the light-transmitting reflective structure includes at least two layers of glass plates 4. Optionally, the light-transmitting reflective structure is double-layer glass. The double-layer glass can be used to allow incident light to penetrate into the concentrator 1 and reduce the proportion of light escaping from the concentrator 1.

[0064] In this embodiment, a first cavity is formed between the third photovoltaic assembly 2 and the inner end surface of the concentrator 1 closest to it, a second cavity is formed between the first photovoltaic assembly 9 and the second photovoltaic assembly 10 and the inner end surface of the concentrator 1 closest to it, an air channel 6 is provided inside the second reflecting surface, and an air interlayer 5 is provided between adjacent glass plates 4;

[0065] The air channel 6, the air interlayer 5, the first cavity and the second cavity are connected to form a closed air circulation channel.

[0066] Specifically, the waste heat generated by the photovoltaic modules inside the concentrator 1 when generating electricity can be transferred to the inside of the closed air circulation channel to heat the air inside the closed air circulation channel and form a heat flow. The heat flow circulates along the closed air circulation channel, which can form a "greenhouse effect" inside the concentrator 1, so that the overall device has a good thermal insulation effect, shortens the effective heat collection time, and further improves the energy utilization rate. Not only that, if the surface of the double-glazed glass is frosted in cold weather, the heat flow inside the air circulation channel can achieve an automatic defrosting effect.

[0067] Furthermore, the heat release ends of the first photovoltaic assembly 9 and the second photovoltaic assembly 10 face the second cavity, while the heat release end of the third photovoltaic assembly 2 faces the first cavity. This ensures that the waste heat generated during the operation of the first photovoltaic assembly 9, the second photovoltaic assembly 10, and the third photovoltaic assembly 2 is more quickly transferred to the interior of the closed air circulation channel, thereby heating the air therein.

[0068] In the above embodiment, the closed air circulation flow path composed of the air channel 6, the air interlayer 5, the first cavity and the second cavity utilizes the waste heat generated when each photovoltaic module generates electricity to achieve thermal insulation and heat preservation of the device. At the same time, it can achieve self-defrosting in cold weather. The waste heat generated by oblique incident solar power generation can self-eliminate frost on the surface of the glass plate 4, thereby improving the effective operating time and total output energy of the concentrating and collecting device in cold weather.

[0069] In this embodiment, the photothermal conversion receiver 8 is a spiral receiver mounted on a support frame 15 located within the single-layer glass tube 7. This spiral receiver can be an equidistant spiral structure, coated with a selectively absorbent coating material. This spiral receiver utilizes the buoyant force of the hot air 14 to create a "tornado" effect, reducing the power consumption of the fan 12 for heat exchange, improving the heat exchange efficiency between the photothermal conversion receiver 8 and the circulating air, and lowering the overall device investment cost and operational complexity.

[0070] In this embodiment, the concentrator 1 occupies the end face, which is composed of the smallest area of ​​the entire device and can be easily integrated with existing buildings without occupying extra land for construction.

[0071] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0072] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "first aspect embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A concentrating and heat collecting device, characterized in that: include: A concentrator (1) having a pair of first reflecting surfaces, a second reflecting surface being connected between the side edges of the pair of first reflecting surfaces close to the focal spot position of the concentrator (1), and a light entrance (3) being formed between the side edges of the pair of first reflecting surfaces away from the second reflecting surface; A heat collecting assembly is arranged at the focal spot position of the concentrator (1); A light-transmitting and reflecting structure is arranged at the light entrance (3); in, The incident light is reflected by a pair of the first reflecting surface and the second reflecting surface and converges onto the heat collecting assembly; Incident light can pass through the light-transmitting reflective structure, and the light-transmitting reflective structure can reflect the escaping light to the heat collection assembly; A first photovoltaic assembly (9) and a second photovoltaic assembly (10) are sequentially provided between a pair of the first reflecting surfaces, the first photovoltaic assembly (9) and the second photovoltaic assembly (10) are both electrically connected to a sun tracking controller, the sun tracking controller is electrically connected to a driving member (11), and the driving member (11) is drivingly connected to the concentrator; The sun tracking controller is used to compare the output electric powers of the first photovoltaic assembly (9) and the second photovoltaic assembly (10), and drive the driving member (11) to drive the concentrator (1) to rotate toward the side with smaller output electric power until the output electric powers of the first photovoltaic assembly (9) and the second photovoltaic assembly (10) are consistent.

2. The concentrating and heat collecting device according to claim 1, characterized in that: The heat collecting assembly comprises: A single-layer glass tube (7) is arranged at the focal spot position of the concentrator (1); A light-heat conversion receiver (8) is arranged inside the single-layer glass tube (7); in, The single-layer glass tube (7) is connected to a fan (12), and the fan (12) is used to drive the air flow inside the single-layer glass tube (7) and exchange heat with the photothermal conversion receiver (8) to generate hot air (14) for output; The wind turbine (12) is electrically connected to a third photovoltaic component (2), and the third photovoltaic component (2) is arranged between a pair of the first reflecting surfaces.

3. The concentrating and heat collecting device according to claim 2, characterized in that: The third photovoltaic assembly (2) is arranged at the upper end of a pair of the first reflecting surfaces, the first photovoltaic assembly (9) and the second photovoltaic assembly (10) are arranged at the lower end of a pair of the first reflecting surfaces, and the first photovoltaic assembly (9), the second photovoltaic assembly (10) and the third photovoltaic assembly (2) are all arranged at an angle for receiving and reflecting incident light and escaping light.

4. The concentrating and heat collecting device according to claim 2, characterized in that: The light-transmitting reflective structure comprises at least two layers of glass plates (4), with an air interlayer (5) between adjacent glass plates (4).

5. The concentrating and heat collecting device according to claim 4, characterized in that: A first cavity is formed between the third photovoltaic assembly (2) and the inner end surface of the concentrator (1) closest thereto, a second cavity is formed between the first photovoltaic assembly (9) and the second photovoltaic assembly (10) and the inner end surface of the concentrator (1) closest thereto, and an air passage (6) is provided inside the second reflecting surface; The air channel (6), the air interlayer (5), the first cavity and the second cavity are connected to form a closed air circulation channel.

6. The concentrating and heat collecting device according to claim 5, characterized in that: The heat release ends of the first photovoltaic component (9) and the second photovoltaic component (10) face the second cavity, and the heat release end of the third photovoltaic component (2) faces the first cavity.

7. The concentrating and heat collecting device according to claim 2, characterized in that: The photothermal conversion receiver (8) is a spiral receiver, which is arranged on a support frame (15), and the support frame (15) is located inside the single-layer glass tube (7).

8. The concentrating and heat collecting device according to claim 1, characterized in that: The first photovoltaic assembly (9) and the second photovoltaic assembly (10) are symmetrically arranged.

9. The concentrating and heat collecting device according to any one of claims 1 to 8, characterized in that: The concentrator (1) is a trough-type compound parabolic concentrator.

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