CN206919431U - A kind of free of sun tracking energy beam condensing unit - Google Patents

Abstract

The utility model discloses a tracking-free solar energy concentrating device, which comprises a light-transmitting refractor whose refractive index increases sequentially from top to bottom for changing the light path, and a phenanthrene that is arranged directly below the light-transmitting refractor and is used for focusing light. Neil lens, and a light receiver set under the Fresnel lens to utilize solar energy; the sun's rays pass through the light-transmitting refractor from top to bottom, and according to the law of refraction, the light will gradually be deflected when passing through the light-transmitting refractor Refraction, the incident angle will gradually decrease, so as to improve the incident direction of the light, so that the light can further enter the Fresnel lens vertically, and then the light will form a circle at the focus of the Fresnel lens after being focused by the Fresnel lens. Stabilize the light spot, finally realize the tracking-free fixed focus of light, ensure that the light receiver located under the Fresnel lens has enough solar energy to use, and improve the utilization rate of light. Therefore, the tracking-free solar concentrating device provided by the utility model, It can effectively gather light and improve light utilization.

Description

A tracking-free solar concentrating device

technical field

The utility model relates to the technical field of solar energy utilization, in particular to a tracking-free solar energy concentrating device.

Background technique

Solar energy is a clean, renewable energy that can be widely used around the world, but limited by the level of funds and technology, only a small percentage of the sun's energy has been effectively developed and utilized.

The Fresnel lens was invented by French physicist Augustin Fresnel, the light emitted through it can be seen 32km away, and since the Fresnel lens was invented, it has greatly promoted the utilization of solar energy However, the direction of solar light is changeable, and it is currently impossible to effectively track solar light, resulting in poor concentrating effect and low light utilization.

Therefore, how to effectively gather light and improve the utilization rate of light is a technical problem to be solved by those skilled in the art.

Utility model content

The purpose of the utility model is to provide a tracking-free solar light concentrating device, which can effectively gather light and improve the utilization rate of light.

In order to solve the above technical problems, the utility model provides a tracking-free solar concentrating device, which includes a light-transmitting refractor whose refractive index increases sequentially from top to bottom to change the optical path, and is located directly below the light-transmitting refractor. And a Fresnel lens for focusing light, and a light receiver arranged under the Fresnel lens to utilize solar energy.

Preferably, the light-transmitting refractor includes multiple layers of light-transmitting plates closely arranged from top to bottom according to their refractive index, and the light-transmitting plate with the largest refractive index is located at the bottom layer.

Preferably, the light-transmitting refractor includes three layers of the light-transmitting plates, and each of the light-transmitting plates is a polymethyl methacrylate plate, a resin glass plate and a lead glass plate from top to bottom.

Preferably, the light-transmitting refractor is a single light-transmitting medium whose density gradually increases from top to bottom.

Preferably, the Fresnel lens is arranged close to the bottom of the light-transmitting refractor.

Preferably, a coverless housing is also included, and the light-transmitting refractor, the Fresnel lens and the light receiver are all installed in the coverless housing.

Preferably, a reflective layer for preventing light from escaping is provided on the upper part of the coverless housing surrounding the light-transmitting refractor, and the lower part of the coverless housing is made of a light-transmitting material, and The lower part of the shell without a cover and the light-transmitting refractor form a closed space.

Preferably, fins for receiving light focused outside the light receiver are provided around the light receiver.

Preferably, the fins are corrugated fins, and the upper surface of the fins is coated with a heat absorbing coating.

Preferably, the light receiver is specifically a solar battery.

The tracking-free solar concentrating device provided by the utility model includes a light-transmitting refractor whose refractive index increases sequentially from top to bottom to change the optical path, and a Fresnel arranged directly below the light-transmitting refractor and used to focus light lens, and a light receiver placed under the Fresnel lens to harness solar energy.

The sun's rays pass through the light-transmitting refractor from top to bottom. Since the refractive index of the light-transmitting refractor increases from top to bottom, according to the law of refraction, when light enters an optically dense medium from an optically sparse medium, it is located at the level of the optically sparse medium. The incident angle on the side of the light is greater than the exit angle on the side of the optically dense medium, the light will gradually deflect when passing through the light-transmitting refractor, and the incident angle will gradually decrease, so as to improve the incident direction of the light and make the light more transparent Further, it enters the Fresnel lens vertically, and after being focused by the Fresnel lens, the light forms a stable spot at the focus of the Fresnel lens, and finally realizes the tracking-free fixed focus of the light, ensuring that the light located under the Fresnel lens The light receiver has enough solar energy to be utilized, so that the utilization rate of light is improved. To sum up, the tracking-free solar energy concentrating device provided by the utility model can effectively concentrate light and improve the utilization rate of light.

Description of drawings

Fig. 1 is the structural representation of a specific embodiment of the tracking-free solar concentrating device provided by the utility model;

Fig. 2 is the concentrating schematic diagram of a specific embodiment of the tracking-free solar concentrating device provided by the utility model;

Fig. 3 is a schematic diagram of the light incident state of another specific embodiment of the tracking-free solar concentrating device provided by the present invention;

Fig. 4 is a structural schematic diagram of another specific embodiment of the tracking-free solar concentrating device provided by the present invention.

detailed description

The core of the utility model is to provide a tracking-free solar light concentrating device, which can effectively gather light and improve the light utilization rate.

In order to enable those skilled in the art to better understand the solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Please refer to FIG. 1 , which is a schematic structural view of a specific embodiment of the tracking-free solar concentrating device provided by the present invention.

The tracking-free solar concentrating device provided by the specific embodiment of the utility model includes a light-transmitting refractor 1, and the refractive index of the light-transmitting refractor 1 increases sequentially from top to bottom to change the optical path of the incident light. A Fresnel lens 2 for focusing light is arranged directly under the refractor 1 , and a light receiver 3 for utilizing solar energy is arranged under the Fresnel lens 2 .

The sun's rays pass through the light-transmitting refractor 1 from top to bottom. Since the refractive index of the light-transmitting refractor 1 increases sequentially from top to bottom, according to the law of refraction, when light enters an optically dense medium from an optically sparse medium, it is located at the optically sparse If the incident angle on one side of the medium is greater than the exit angle on the side of the optically dense medium, the light will gradually deflect when passing through the light-transmitting refractor 1, and the incident angle will gradually decrease, thereby improving the incident direction of the light and making it The light can further enter the Fresnel lens 2 vertically, and then after being focused by the Fresnel lens 2, the light forms a stable spot at the focus of the Fresnel lens 2, and finally realizes the tracking-free fixed focus of the light, ensuring that it is set at The light receiver 3 under the Fresnel lens 2 has enough solar energy to be utilized, thereby improving light utilization efficiency. To sum up, the tracking-free solar energy concentrating device provided by the utility model can effectively concentrate light and improve the utilization rate of light.

Please refer to FIG. 2 , which is a schematic diagram of the concentrating principle of a specific embodiment of the tracking-free solar concentrating device provided by the present invention.

In the non-tracking solar concentrating device provided by the specific embodiment of the utility model, the light-transmitting refractor 1 has various structures. In a specific embodiment, the light-transmitting refractor 1 may include multiple layers of transparent The light plate 11, each light-transmitting plate 11 is closely arranged according to its refractive index from top to bottom, and the light-transmitting plate 11 with the largest refractive index is located at the bottom layer, so as to ensure that the refractive index of the light-transmitting refractor 1 is from top to bottom increase in turn; the light-transmitting refractors 1 are arranged in layers, so that the light is refracted at the interface of adjacent light-transmitting plates 11 .

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of the light incident state of another specific embodiment of the tracking-free solar concentrating device provided by the present invention.

Specifically, the light-transmitting refractor 1 may include three layers of light-transmitting plates 11, and each light-transmitting plate 11 may be a polymethyl methacrylate (PMMA) plate, a resin glass plate, and a lead containing 90% PbO in sequence from top to bottom. The refractive index of the glass plate, the PMMA plate is 1.49, the refractive index of the resin glass plate is 1.9, the refractive index of the lead glass plate containing 90% PbO is 2.1, and the refractive index of the three increases gradually.

Taking the incident angle of light in air as 60° as an example, according to the law of refraction,

Then sinα=0.58, α=35.5°,

Then the light is refracted at the interface of the PMMA plate and the resin glass plate at an incident angle of 35.5°,

Then sinβ=0.46, β=27.0°,

Then the light is refracted at the interface of the resin glass plate and the lead glass plate at an incident angle of 32°,

Then sinγ=0.41, γ=24.3°.

Among them, α is the exit angle of light on the side of the medium PMMA plate, β is the exit angle of light on the side of the dielectric resin glass plate, γ is the exit angle of light on the side of the lead glass plate, n ₀ is the refraction of light in air Ratio, n _α is the refractive index of the PMMA plate, n _β is the refractive index of the resin glass plate, and n _γ is the refractive index of the lead glass plate containing 90% PbO.

It can be seen that, after passing through the light-transmitting refractor 1, the light is incident from 60° to 24.3°, which greatly improves the incident direction of the light, and makes the light further vertically enter the Fresnel lens 2, effectively focusing and improving light utilization.

Of course, the light-transmitting refractor 1 can also be formed by successively stacking two, four or more layers of light-transmitting plates 11, and the material of each layer of light-transmitting plates 11 can also be specifically adjusted, which is not specifically limited in this application. As long as the refractive index of the light-transmitting refractor 1 increases sequentially from top to bottom, it is within the protection scope of the present invention.

In another specific embodiment, the light-transmitting refractor 1 can also be a single light-transmitting medium whose density gradually increases from top to bottom, that is, the light-transmitting refractor 1 can be made of the same light-transmitting medium, and ensure that Its density is sparse at the top and dense at the bottom, so that the refractive index increases from top to bottom; taking lead glass as an example, a lead glass plate with a gradually increasing PbO content can be used. Usually, as the PbO content increases, the refractive index also gradually increases. For example, the refractive index of lead glass containing 37% PbO is 1.60, and the refractive index of lead glass containing 62% PbO is 1.7. The density of the light-transmitting medium may increase uniformly or non-uniformly from top to bottom. Specifically, the light-transmitting medium may be glass or the like, which is not specifically limited in the present application.

On the basis of the above specific embodiments, in the tracking-free solar concentrating device provided by the specific embodiments of the present invention, the Fresnel lens 2 can be placed close to the bottom of the light-transmitting refractor 1, or can directly refract the light The bottom of the refractor 1 is cut into a Fresnel lens 2, so that the sun's rays are refracted by the light-transmitting refractor 1 and then focused directly through the Fresnel lens 2 to avoid reflection and deflection when the light is emitted from the light-transmitting refractor 1 to the air. In order to achieve a better light-gathering effect.

Please refer to FIG. 4 . FIG. 4 is a structural schematic diagram of another specific embodiment of the tracking-free solar concentrating device provided by the present invention.

On the basis of the above-mentioned specific embodiments, the tracking-free solar concentrating device provided by the specific embodiment of the utility model can also include a coverless housing 5, and the light-transmitting refractor 1, the Fresnel lens 2 and the light receiving The devices 3 are all installed in the coverless housing 5, and the setting of the coverless housing 5 will not affect the incident of light, but also facilitate the installation of various components.

Further, the upper part of the coverless housing 5 is arranged around the light-transmitting refractor 1, and a reflective layer for preventing light from escaping can be provided on the upper part of the coverless housing 5, which can effectively prevent the solar altitude angle from When it is low, part of the light will pass through the light-transmitting refractor 1 to the outside world, ensuring that the light irradiated on the light-transmitting refractor 1 can be utilized; the lower part of the coverless housing 5 can be made of light-transmitting material, and A sealed space is formed with the light-transmitting refractor 1, and the Fresnel lens 2 and the light receiver 3 are all arranged in the sealed space, so that light can enter the sealed space through the lower part of the coverless housing 5, and in the sealed space The closed space can be filled with dry air or CO ₂ , so that the closed space can form a greenhouse effect and further utilize heat radiation. The structure of the coverless casing 5 is not limited thereto, and the coverless casing 5 may not be provided, which is also within the protection scope of the present invention.

On the basis of the above-mentioned specific embodiments, in the tracking-free solar concentrating device provided by the specific embodiment of the utility model, the light receiver 3 is arranged below the Fresnel lens 2 for utilizing solar energy, and around the light receiver 3 can be Fins 4 are provided, and the fins 4 are connected with the light receiver 3 as a whole for receiving the light focused outside the light receiver 3 and increasing the utilization rate of light.

Further, the fins 4 can specifically be corrugated fins 4, which can increase the surface area of the fins 4; in addition, the upper surface of the fins 4 can be coated with a heat-absorbing coating, which can be used to absorb heat radiation, and further utilize solar energy.

On the basis of the above-mentioned specific embodiments, in the tracking-free solar concentrating device provided by the specific embodiments of the present invention, the light receiver 3 can be set by itself according to needs, specifically, it can be a solar battery, a solar battery panel, etc. within the scope of the new protection.

The tracking-free solar concentrating device provided by the utility model has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present utility model, and the descriptions of the above embodiments are only used to help understand the method and core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made to the utility model, and these improvements and modifications also fall into the protection of the claims of the utility model. within range.

Claims (10)

1. A tracking-free solar concentrating device, characterized in that it includes a light-transmitting refractor whose refractive index increases sequentially from top to bottom for changing the light path, is arranged directly below the light-transmitting refractor and is used for focusing A Fresnel lens for light, and a light receiver positioned below the Fresnel lens to harness solar energy. 2. The tracking-free solar concentrating device according to claim 1, wherein the light-transmitting refractor comprises multi-layer light-transmitting plates closely arranged from top to bottom according to their refractive index, and the refractive index The largest light-transmitting plate is located at the lowest layer. 3. The tracking-free solar concentrating device according to claim 2, wherein the light-transmitting refractor comprises three layers of said light-transmitting plates, and each said light-transmitting plate is sequentially polymethyl Acrylic panels, Plexiglas panels, and leaded glass panels. 4. The tracking-free solar concentrating device according to claim 1, wherein the light-transmitting refractor is a single light-transmitting medium whose density gradually increases from top to bottom. 5 . The tracking-free solar concentrating device according to any one of claims 1 to 4 , wherein the Fresnel lens is arranged close to the bottom of the light-transmitting refractor. 6. The tracking-free solar concentrating device according to claim 5, further comprising a coverless housing, the light-transmitting refractor, the Fresnel lens and the light receiver are all mounted on the inside the coverless case. 7. The tracking-free solar concentrating device according to claim 6, wherein a reflective layer for preventing light from escaping is provided on the upper part of the coverless housing surrounding the light-transmitting refractor, The lower part of the shell without a cover is made of light-transmitting material, and the lower part of the shell without a cover and the light-transmitting refractor form a closed space. 8 . The tracking-free solar concentrating device according to claim 7 , wherein fins for receiving light focused outside the light receiver are provided around the light receiver. 8 . 9. The tracking-free solar concentration device according to claim 8, wherein the fins are corrugated fins, and the upper surface of the fins is coated with a heat absorbing coating. 10 . The tracking-free solar concentrating device according to claim 8 , wherein the light receiver is specifically a solar battery. 11 .