Heliostat

Abstract

The utility model provides a heliostat. The utility model relates to the technical field of heliostats. The heliostat comprises a reflecting surface and a bracket for supporting the reflecting surface; the reflecting surface comprises a plurality of lenses, and light spots reflected by the plurality of lenses coincide together. The embodiment of the utility model provides a heliostat for realizing high-multiple light condensation.

Description

TECHNICAL FIELD

[0001] The utility model relates to heliostat technical field especially relates to a heliostat. BACKGROUND

[0002] In the energy field, solar energy as a kind of clean renewable energy gets more and more application, in the solar power generation field, solar power generation mode has photovoltaic power generation and heat generation two kinds. With the development of science and technology, especially the rise of computer control technology, solar heat power generation technology is the emerging solar energy utilization technology after photovoltaic power generation technology. Solar heat power generation is through a large number of reflectors to focus the energy of solar direct light in a focused manner, heats the working medium, generates high-temperature high-pressure steam, to steam drive steam turbine power generation.

[0003] Tower type solar heat power generation is to use a large number of directional reflectors (heliostat) to concentrate solar light on a central heat exchanger (absorber) installed on the tower top, to drive turbine rotation by heating the fluid inside to generate electricity. At present, the heliostat concentration ratio is not more than fifteen times, and high multiple concentration cannot be realized. SUMMARY

[0004] The embodiment of the utility model provides a kind of heliostat to realize high multiple concentration.

[0005] The embodiment of the utility model provides a kind of heliostat, including reflecting surface and the support for supporting the reflecting surface;The reflecting surface includes multiple lenses, and the light spot after being reflected by multiple lenses is overlapped together.

[0006] Optionally, multiple lenses have the same surface type.

[0007] Optionally, the surface type of the lens includes parabolic surface.

[0008] Optionally, the edge of the lens is square.

[0009] Optionally, the side length of the square is greater than or equal to 600mm.

[0010] Optionally, multiple lenses include first lens and second lens, and the side length of the first lens is greater than the side length of the second lens.

[0011] The second lens is arranged at the periphery of the first lens.

[0012] Optionally, the reflecting surface further includes solar panel, and the solar panel is located at the periphery of the lens.

[0013] Optionally, it further includes battery, and the battery is electrically connected with the solar panel, for storing the electric energy generated by the solar panel.

[0014] Optionally, the lens comprises a light coating, which uses a way of reflecting concentrated light and / or transmitting dispersed light to respectively irradiate different wavelength bandwidths of the same light beam onto different optical materials in the light coating.

[0015] Optionally, the outer edge of the support is circular.

[0016] In the embodiment of the utility model, each lens is an independent reflection unit, which is equivalent to the whole formed by splicing multiple lenses in the related art. In the embodiment of the utility model, a single lens concentrates light alone, and the light spots reflected by multiple lenses coincide together, and the light spots concentrated by multiple lenses are gathered at the same point instead of being dispersed at different spatial positions, thereby improving the light concentration ability and realizing high-multiple light concentration. As an example, the heliostat provided by the embodiment of the utility model solves the problem of more than 20 square meters of mirror surface and more than thirty times of light concentration ratio, and realizes high-multiple light concentration. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a top view of a heliostat according to an embodiment of the utility model;

[0018] Figure 2 Fig. 2 is another top view of a heliostat according to an embodiment of the utility model;

[0019] Figure 3 Fig. 3 is another top view of a heliostat according to an embodiment of the utility model. DETAILED DESCRIPTION

[0020] The utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings instead of all the structures.

[0021] The circular heliostat is the most effective structure form to realize high-quality approximate circular light spot, and can meet the stability requirements of the mirror frame in various outdoor climate environments. At present, the light concentration ratio of the heliostat does not exceed fifteen times, and high-multiple light concentration cannot be realized.

[0022] It is found that in the related art, multiple lenses are spliced into the shape of a concave mirror. Each lens is a part of the whole concave mirror. The light spot reflected by the lens is a part of the light spot reflected by the concave mirror. The light spots reflected by multiple lenses form a whole large light spot mainly through splicing. For a single lens, the light spot reflected thereby is a part of the approximate circular light spot, and can also be a special-shaped light spot, not an approximate circular light spot. Therefore, the light concentration ratio of the heliostat does not exceed fifteen times at present, and high-multiple light concentration cannot be realized.

[0023] Figure 1 A top view schematic diagram of the heliostat is provided in the embodiments of the present application, referring to Figure 1 , the heliostat comprises a reflecting surface 100 and a support (not shown in the figure) for supporting the reflecting surface 100. The structure of the support can adopt the structure in the related art, which will not be described herein. The reflecting surface 100 comprises a plurality of lenses 20, and the light spots reflected by the plurality of lenses 20 coincide together. Figure 1

[0024] In the embodiments of the present application, each lens 20 is an independent reflecting unit, which is equivalent to the whole formed by splicing a plurality of lenses in the related art. In the embodiments of the present application, a single lens 20 concentrates light individually, the light spots reflected by the plurality of lenses 20 coincide together, and the light spots concentrated by the plurality of lenses 20 are collected at the same point instead of being dispersed at different spatial positions, thereby improving the light concentration ability and realizing high-multiple light concentration. As an example, the heliostat provided in the embodiments of the present application solves the problem of more than 20 square meters of mirror surface and more than thirty times of light concentration ratio, and realizes high-multiple light concentration.

[0025] Exemplarily, the light spots reflected by the plurality of lenses 20 have the same shape, and the plurality of light spots with the same shape coincide at the same spatial position. The light spot reflected by the lens 20 is an approximately circular reflected light spot.

[0026] Optionally, referring to Figure 1 , the plurality of lenses 20 have the same surface type. On the one hand, the difficulty of processing and assembling the heliostat can be reduced. On the other hand, the light spots reflected by the plurality of lenses 20 with the same surface type have the same shape. The superposition of the light spots reflected by the plurality of lenses 20 at the same spatial position is facilitated.

[0027] Optionally, referring to Figure 1 , the surface type of the lens 20 comprises a parabolic surface. The sun light is reflected and converged by the parabolic surface-shaped lens 20 to form a circular light spot or a circular-like light spot. Due to the sun light irradiation angle and other factors, the light spot formed by the reflection and convergence is not a strict circular light spot, but an approximately circular light spot. In other embodiments, the lens 20 can also comprise other forms of surface types.

[0028] Optionally, referring to Figure 1 , the edge of the lens 20 is square. In the assembling process, the flat plate-shaped lens 20 is installed on the support, and after adjustment, it becomes a curved mirror with a certain arc. The stress points at various spatial positions are relatively uniform when the square is adjusted. Therefore, the edge of the lens 20 is set to be square.

[0029] Optionally, referring to Figure 1 ​The edge of lens 20 is square, and the side length of the square is greater than or equal to 600mm.

[0030] Figure 2 A top view schematic diagram of another heliostat provided in this embodiment of the present invention, with reference to... Figure 2 The plurality of lenses 20 includes a first lens 21 and a second lens 22, wherein the side length of the first lens 21 is greater than the side length of the second lens 22. The second lens 22 is disposed around the first lens 21. The second lens 22 is a smaller lens 20, and the first lens 21 is a larger lens. After the first lenses 21 are spliced ​​and arranged, the smaller second lens 22 is filled in the gaps between adjacent first lenses 21 along the circumferential direction and located around the first lenses 21. The lenses 20 can be filled within the effective area. And the shape of the reflective surface 100 is spliced ​​into a near-circular shape as much as possible (e.g., Figure 2 (As shown by the dashed line).

[0031] Figure 3 A top view schematic diagram of another heliostat provided in this embodiment of the present invention, with reference to... Figure 3 The reflective surface 100 also includes a solar panel 30, which is located around the lens 20. The solar panel 30 fills the space around the lens 20 without affecting the quality of the reflected light spot; it also does not occupy the space originally used for reflection and does not reduce the reflective area of ​​the reflective surface 100. The solar panel 30 has photovoltaic power generation capabilities, providing the heliostat with electrical power for operation.

[0032] Furthermore, the heliostat also includes a battery ( Figure 3 (Not shown in the image), the battery is electrically connected to the solar panel 30, and the battery is used to store the electrical energy generated by the solar panel 30. Therefore, the heliostat can continue to operate even without sunlight, and the heliostat's power supply time is longer.

[0033] Optionally, the lens 20 includes a light coating that uses reflection focusing and / or transmission dispersion to separately illuminate different optical materials within the light coating with light of different wavelength bandwidths from the same beam, thereby improving the utilization rate of light.

[0034] Optionally, the outer edge of the bracket is rounded. A round bracket fits a near-circular reflective surface 100. A round bracket occupies less space. A round shape offers better resistance to wind, vibration, etc., and provides better stability.

[0035] For example, refer to Figure 3 The heliostat also includes a support point 40, and the lens 20 is fixed to the bracket by at least one support point 40.

[0036] As an example, the lens 20 is secured to the holder by five support points 40. One of the support points 40 is disposed at the center of the square lens 20, and the other four support points 40 are disposed at the four corners of the square lens 20. In other embodiments, the lens 20 can be secured to the holder by other numbers of support points 40.

[0037] It should be noted that the above only describes the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments, mutual combinations and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A heliostat, characterized in that, The reflector comprises a plurality of mirrors, and the light spots reflected by the plurality of mirrors are overlapped together.

2. The heliostat of claim 1, wherein, The plurality of mirrors have the same surface shape.

3. The heliostat of claim 2, wherein, The surface shape of the mirror comprises a parabolic surface.

4. The heliostat of claim 1, wherein, The edge of the mirror is square.

5. The heliostat of claim 4, wherein, The side length of the square is greater than or equal to 600 mm.

6. The heliostat of claim 4, wherein, The plurality of mirrors comprise a first mirror and a second mirror, and the side length of the first mirror is greater than that of the second mirror. The second mirror is arranged at the periphery of the first mirror.

7. The heliostat of claim 1, wherein, The reflector further comprises a solar panel arranged at the periphery of the mirror.

8. The heliostat of claim 7, wherein, The reflector further comprises a battery electrically connected with the solar panel and used for storing the electric energy generated by the solar panel.

9. The heliostat of claim 1, wherein, The mirror comprises a light coating, and the light coating is used for irradiating different wavelength bands of the same light beam onto different optical materials by means of reflection and / or transmission.

10. The heliostat of claim 1, wherein, The outer edge of the support is circular.

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