WO2018090277A1

WO2018090277A1 - Concentrated light-energy receiving device

Info

Publication number: WO2018090277A1
Application number: PCT/CN2016/106216
Authority: WO
Inventors: 胡笑平
Original assignee: 博立多媒体控股有限公司; 胡笑平
Priority date: 2016-11-17
Filing date: 2016-11-17
Publication date: 2018-05-24

Abstract

Provided is a concentrated light-energy receiving device, comprising at least two light-receiving units (110). Each light-receiving unit (110) comprises a cone-shaped light-guiding component (111), a light-receiving panel (112) and a light-energy utilization component (113). The interior of the cone-shaped light-guiding component (111) comprises mirrored surfaces; the light-receiving panel (112) is made of light-transmissive material, and is arranged on the end of the cone-shaped light-guiding component (111) having the larger opening; the light-energy utilization component (113) is arranged on the end of the cone-shaped light-guiding component (111) having the smaller opening. The light-receiving panels (112) of all of the light-receiving units (110) are arranged in the same plane, forming an integral top structural layer; or the light-energy utilization components (113) of all of the light-receiving units (110) are arranged in the same plane, forming an integral bottom structural layer. A plurality of light-receiving units (110) having the ability to concentrate light are integrated together using at least a shared top surface or bottom surface, reducing the light-receiving area of the individual light-receiving units (110) and thus effectively decreasing the height of the device; furthermore, the integral top or bottom structural layer makes it easy to machine in an integrated manner, thereby facilitating a reduction in the cost to manufacture the device.

Description

Concentrating light energy receiving device

Technical field

[0001] The present invention relates to the field of clean energy technologies, and in particular, to a concentrating light energy receiving device.

BACKGROUND OF THE INVENTION

[0003] With the increasing emphasis on environmental protection, solar energy systems have become more widely used. Existing solar energy systems can be classified into direct illumination type and concentrated light type.

[0004] Direct-illuminated solar systems rely primarily on light energy utilizing devices such as photovoltaic panels to directly collect sunlight. In order to collect enough sunlight, it requires a large amount of photovoltaic panels, and it also requires a large area of land, resulting in high system cost and low land use efficiency.

[0005] A concentrating solar system generally focuses sunlight on a light energy utilizing device through a lens, so that a smaller area of light energy utilizing the device can obtain sunlight concentrated from a larger area of the lens, and thus is better. The ability to collect light energy. However, when the area of the lens is large, the concentrating solar system usually needs to have a high height, which not only affects the installation cost of the system, but also affects the aesthetics and the application range of the system. Therefore, it is necessary to study a solar system that can both increase light energy collection ability and have a lower height.

SUMMARY OF THE INVENTION

According to the present invention, there is provided a concentrating light energy receiving device comprising at least two light receiving units. Each of the light receiving units includes a tapered light guiding device having a larger opening at one end and a smaller opening at the other end, and the inside is a mirror surface; a light receiving panel made of a light transmissive material and disposed on the tapered light guiding device幵a larger end of the port; and a light energy utilizing device disposed at a smaller end of the tapered light guiding device, the light receiving surface facing the larger end of the tapered light guiding device for receiving the received light Energy conversion or utilization can be performed; the light-receiving panels of all light-receiving units are disposed on the same plane to form an integral top structural layer, or the light energy of all light-receiving units is disposed on the same plane by the device, forming an integral bottom structural layer .

According to the concentrating light energy receiving device of the present invention, a plurality of light receiving units having a condensing ability are integrated in a manner of sharing at least a top surface or a bottom surface, and the light receiving area of the single light receiving unit can be effectively reduced. Lower the height of the unit and the overall top or bottom structural layer makes it easy to integrate in an integrated way Processing is beneficial to reduce the manufacturing cost of the device. Moreover, compared with the previously proposed light energy receiving device for integrating a plurality of light receiving units with Fresnel lenses, the present invention adopts a tapered light guiding device whose inner surface is a mirror surface, which can not only increase the concentration ratio, but also Eliminate the need to use the Japanese system.

The invention also includes many other variations and modifications. The content and essence of the present invention will be described in detail below with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic view of a concentrating light energy receiving device of Embodiment 1;

2 is a schematic view of a concentrating light energy receiving device of Embodiment 2; [0012] FIG.

3 is a schematic view of a concentrating light energy receiving device of Embodiment 3.

DETAILED DESCRIPTION

[0015] Example 1

One embodiment of the concentrating light energy receiving device according to the present invention may include a plurality of light receiving units 110 with reference to FIG. Each of the light receiving units includes a tapered light guiding device 111, a light receiving panel 112, and a light energy utilizing device 11

3.

[0017] The tapered light guiding device 111 has a larger opening at one end and a smaller opening at the other end, and the inside is a mirror surface. A mirrored reflective layer, such as a reflective coating, may be disposed on the inner surface of the tapered wall, and may be disposed on the outer surface of the tapered wall if the light guiding device is of a transparent material. Through the reflection of the internal mirror, the tapered light guide device can collect the sunlight collected at the larger end of the cornice to the smaller end of the cornice, achieving a low-cost collecting function. Integrating a plurality of conical light guiding devices together, the device according to the invention has a wide adaptability to the angle of incidence of sunlight, and does not have to be used in conjunction with the Japanese system, as in conventional concentrating solar systems. In order to achieve the desired effect.

[0018] As a preferred embodiment, the tapered light guiding device in this embodiment is formed as a quadrangular cone, that is, its cross section is quadrangular. The cross section refers to a section perpendicular to the central axis of the light guiding device. This shape allows a plurality of tapered light guiding devices to be closely spliced together at their larger end, which not only allows for more complete reception of light, but also forms a central structural layer that can be integrally processed. This central structural layer has a low height and a compact size, which is not only easy to process as a whole, but also has the advantage of high strength. In other preferred embodiments, the tapered light guiding device can also adopt other shapes that can be closely spliced, for example, can be formed into a hexagonal cone. In other embodiments, the tapered light guiding device The cross section can also be a shape that is easy to make, such as a circular shape or an elliptical shape.

[0019] The light-receiving panel 112 is made of a light-transmitting material (for example, glass or acrylic) and is disposed at a larger end of the tapered light-guide device. As a preferred embodiment, the light-receiving panel in this embodiment uses a concentrating Fresnel lens to improve the concentrating efficiency of the device. As shown in Fig. 1, the light-receiving panel of each unit is a simple Fresnel lens containing only one Fresnel unit, and its outer surface (the surface facing the outside of the light-receiving unit) is a flat surface, and the inner surface is a tooth surface. In other embodiments, a composite Fresnel lens containing a plurality of Fresnel cells may also be employed. The focal length of each Fresnel unit can be the same or different and can be configured as needed. A detailed description of the Fresnel lens can be found in the name "Fresnel Lens System", published on the date of 20

On June 2, 16th, the PCT application with the international publication number WO/2016/082097 will not be repeated here.

[0020] Combining the Fresnel lens with the tapered light guiding device can increase the concentrating ratio of the device without significantly increasing the height of the device, thereby improving the collection efficiency of light energy. In other embodiments, if the concentration ratio is not high, the light-receiving panel may also adopt a flat light-transmitting panel.

[0021] As a preferred embodiment, the light-receiving panels of all the light-receiving units in this embodiment are disposed on the same plane, and are formed as a whole top structure layer. For example, a monolithically processed composite Fresnel lens can be used.

[0022] The light energy utilizing device 113 is disposed at a smaller end of the tapered light guiding device (or may also be referred to as a bottom portion of the light guiding device), and the light receiving surface thereof faces the larger end of the tapered light guiding device. It is used for energy conversion or utilization of received light energy. Although the device according to the present invention integrally integrates a plurality of light receiving units, the arrangement of the light energy utilizing devices is still distributed due to the concentrating characteristics of the tapered light guiding devices, which helps to reduce heat dissipation. Claim.

[0023] The light energy utilization device used in the present invention may be various devices that convert light energy into other energy, such as photovoltaic panels, photothermal conversion devices, and the like. The so-called photovoltaic panel refers to all photoelectric conversion devices that directly convert light energy into electrical energy, such as polycrystalline silicon photovoltaic panels, monocrystalline silicon photovoltaic panels, CdTe photovoltaic panels, calcium titanium photovoltaic panels, quantum dot photovoltaic panels, gallium arsenide photovoltaic thin films, CIGS photovoltaic film and more. The light energy utilization device can be used alone or in cascade with other energy utilization devices. For example, photovoltaic panels can be cascaded with thermal energy sources to achieve higher solar energy utilization efficiency. The thermal energy consumer can be disposed on the back side of the at least one light energy utilizing device and thermally coupled to the light energy utilizing device. The so-called thermal energy source can be a thermoelectric conversion device or a thermal energy absorbing device. [0024] As a preferred embodiment, each of the light receiving units in this embodiment is formed into a closed structure, that is, the light receiving panel, the tapered light guiding device, and the light energy utilizing device are combined to form a closed cavity. This closed structure prevents foreign matter (such as dust or rain) from affecting the working efficiency or service life of the light energy utilization device. In other embodiments, a gas having a refractive index greater than 1 (which may be referred to as "optical gas") may be further filled in the formed closed structure to further increase the concentration ratio or reduce the height of the cone of the light receiving unit. Alternatively, in other embodiments, the protective gas may be further filled in the formed closed structure. The term "protective gas" refers to a gas that does not react with the working surface of the light energy utilization device. The surface of the light energy utilization device for energy conversion or utilization of the received light energy may be exposed to the shielding gas. In this case, the working surface of the light energy utilization device does not need to be provided with a protective layer, which not only improves the energy conversion efficiency of the light energy utilization device, but also facilitates the heat dissipation and prolongs the life of the light energy utilization device. For example, when the light energy utilization device uses a photovoltaic panel, such a closed and full of protective gas environment can effectively reduce the packaging requirements of the photovoltaic panel, and the surface packaging of the photovoltaic panel has always been an important factor restricting the life of the photovoltaic panel.

[0025] As a preferred embodiment, each light receiving unit in this embodiment further includes a set of light guide vanes 11 4 disposed under the light receiving panel 112. The light guide vanes are inclined from the light receiving panel toward the center of the light energy utilizing device. At least the side of the light guide vane facing the upper portion is a reflective surface capable of reflecting light for concentrating the light incident from the upper portion toward the center of the lower portion. The angle between the light guide vane and the light receiving panel is such that when the sunlight has a large angle with the center line of the tapered light guiding device, the light guiding blade can still introduce sunlight into the bottom of the tapered light guiding device. (ie the smaller end of its mouth). The light guide vane in this embodiment is a multi-layer strip-shaped blade which is symmetrically disposed with respect to the center of the bottom of the tapered light guiding device. In other embodiments, the light guide vanes may also employ a closed ring of symmetrical shape.

In the embodiment, the mounting bracket 120 is used to fix the respective light receiving units. For example, the top structural layer formed by the light-receiving panel can be fixed to the bracket and the remaining components can be fixed and mounted layer by layer. For the sake of simplicity, four light-receiving units are exemplarily shown in Fig. 1, and in actual use, different numbers of light-receiving units can be integrated as needed.

[0027] As a preferred embodiment, the vibrator 130 may be added to the device according to the present invention to implement self-cleaning of the light-receiving panel. In the case where the light-receiving unit adopts a closed structure, the addition of the vibrator enables the device to operate with high efficiency for a long period of time. The vibrator 130 includes a vibrating element 131 and its drive circuit 132. The vibrating element can be mechanically coupled to at least one of the light-receiving panels of the device to cause it to vibrate. In this embodiment, the vibrating elements are mounted on the bracket 120 such that all of the light receiving units can share the same vibrator.

[0028] In order to achieve a good vibration effect, the vibrating element generally operates in a resonant mode. As a preferred embodiment, the driving circuit of the vibrator includes at least one inductance element and at least one capacitance element connected in series, so that the circuit resonance frequency coc of the driving circuit can be set to match the mechanical resonance frequency com of the vibration element (including Same or close). The so-called "frequency" refers to the circular frequency. When the frequency of the drive signal (alternating current or voltage) input to the drive circuit is coc吋, the vibrator can operate in the "double resonance" state of mechanical and circuit resonance. In the dual resonance state, the power consumption of the drive circuit will be significantly reduced.

[0029] The vibrators can be designed in different types. For example, the vibrator may be a piezoelectric vibrator, and the vibrating element employs a piezoelectric element (for example, a piezoelectric vibrating piece) which is connected in series in the driving circuit and serves as a capacitive element in the driving circuit; or, the vibrator may be In the electromagnetic vibrator, the vibrating element adopts a sheet-like magnetic material which is not a part of the driving circuit, and the driving circuit excites the sheet-like magnetized material to generate vibration through the inductance element. The vibrator can be manually activated, or the control circuit can be preferably configured to perform the cleaning operation in a fixed manner or in accordance with an external command or under a set condition to improve the degree of intelligence of the self-cleaning function.

[0030] Example 2

Another embodiment of the light energy receiving device according to the present invention can be referred to FIG. 2, including a plurality of light receiving units 2 10 and a vibrator 230. Each of the light receiving units includes a tapered light guiding device 211, a light receiving panel 212, a light energy utilizing device 213, and a light guiding blade 214.

[0032] The main difference between this embodiment and the embodiment 1 is that the whole device is formed into three structural layers, which are: an integral top structural layer formed by the light-receiving panels of all the light-receiving units, and a tapered guide of all the light-receiving units. The integral central structural layer formed by the optical device, the integral bottom structural layer formed by the light energy utilization devices of all the light receiving units. After the three structural layers are assembled, a plurality of closed light-receiving units are formed, that is, the top and bottom structural layers respectively close the openings at both ends of the central structural layer.

[0033] In this embodiment, one component of the light receiving unit is realized by the three structural layers in a completely integrated manner, so that the processing of the entire device is more integrated and simplified, which contributes to further reducing the cost. In other embodiments, as long as at least one of the top and bottom is formed as a unitary structural layer, integrated processing and fabrication of the entire apparatus is facilitated. [0034] In this embodiment, the tapered light guiding device 211 forming the middle structural layer adopts a hexagonal cone, and the inner surface is a mirror surface, which are closely spliced together. All cones can be fabricated in a one-time, integral process to form an inseparable unit.

[0035] The top structural layer may be a complete flat transparent glass or plastic, or may be composed of a plurality of hexagonal Fresnel lenses arranged closely, each hexagonal pattern corresponding to a light receiving panel of the light receiving unit, It is a simple Fresnel lens or a composite Fresnel lens. When a single light-receiving panel is a composite Fresnel lens, the plurality of Fresnel cells contained therein may have the same or different focal lengths.

Also provided on the top structure layer is a piezoelectric vibrator 230 including a piezoelectric vibrating piece 231 and its driving circuit 232. The piezoelectric vibrator 230 in this embodiment operates in a "double resonance" state, and is provided with a control circuit (not shown), which can be fixed, or in a predetermined condition such as excess power, rain, wind, etc., Smart cleaning of the light-receiving panel to maintain efficient operation of the unit and extend the life of the unit.

[0037] The bottom structural layer may be a PCB substrate (for example, a bakelite substrate or an aluminum substrate) on which a plurality of light energy utilizing devices (such as photovoltaic panels) are disposed.

[0038] The closed structure of each light receiving unit is filled with a gas having a refractive index greater than 1, to help lower the height of the device and improve the light collecting efficiency.

[0039] Each light receiving unit further includes a set of light guide vanes 214 of a ring structure. In this embodiment, the light guide vane is formed into a hexagonal cone, both sides of which are mirror surfaces, and are disposed coaxially with the tapered light guiding device. When there is a large off angle 吋 between the sunlight and the center line of the tapered light guiding device 211, the light guide vanes help to direct sunlight to the bottom of the tapered light guiding device. The light guide vanes can be placed under the respective light receiving panels by means of plugging or bonding.

Embodiment 3

Another embodiment of the light energy receiving device according to the present invention can be referred to FIG. 3, and includes a plurality of light receiving units 3 10, a driving mechanism 330, and a light guide vane 340. Each of the light receiving units includes a tapered light guiding device 311, a light receiving panel 312, and a light energy utilizing device 313.

[0042] The tapered light guiding device 311, the light receiving panel 312 and the light energy utilizing device 313 in this embodiment are similar to those in Embodiment 1, and will not be described again.

[0043] The main difference between this embodiment and Embodiment 1 is that the device further includes a set of light guide vanes 340 disposed above the top structural layer formed by all the light receiving panels, and the light guide vanes are inclined toward the center of the device. This embodiment The light guide vane in the concrete comprises two strip-shaped leaf plates. Moreover, as a preferred embodiment, the bottom of the light guide vane in the embodiment is pivotally connected to the top structure layer, and can be deflected by the driving mechanism 330 to change the tilt angle thereof. This implements a simple and efficient way of tracking the sun.

[0044] The drive mechanism 330 is specifically an ultrasonic motor whose stator is fixed to a fixing member (for example, a top structural layer or a tapered light guiding device) of the device by a support member 333 whose rotor drives the screw 334 to rotate. The two ends of the screw 334 are respectively connected to the two strip-shaped blade plates. When the screw is rotated, the two strip-shaped blade plates are deflected, and the size of the mouth between the blades is changed.

[0045] It is worth noting that, since the ultrasonic motor is used as the driving mechanism, the vibration of the vibrator is transmitted to the light-receiving panel through the connecting member such as the support member, and therefore the ultrasonic motor also functions as a vibrator for realizing the sun tracking. At the same time, automatic cleaning of the light-receiving panel is achieved.

[0046] The drive mechanism in this embodiment is merely exemplary, and those skilled in the art understand that any other drive mode can be employed.

[0047]

The present invention has been described with reference to the specific embodiments of the present invention. It is understood that the above embodiments are only used to help the understanding of the present invention and are not to be construed as limiting the invention. Variations to the above-described embodiments may be made by those skilled in the art in light of the teachings herein. technical problem

Problem solution

Advantageous effects of the invention

Claims

Claim

[Claim 1] A concentrating light energy receiving device, comprising:

At least two light receiving units, each of which includes

A tapered light guiding device has a larger opening at one end and a smaller opening at the other end, and has a mirror-receiving panel inside, and is made of a light-transmitting material, and is disposed at a mouth of the tapered light guiding device. One end;

a light energy utilizing device disposed at a smaller end of the tapered light guiding device, the light receiving surface facing the larger end of the tapered light guiding device for energizing the received light energy Conversion or utilization;

The light-receiving panels of all the light-receiving units are disposed on the same plane to form an integral top structural layer, or the light-receiving units of all the light-receiving units are disposed on the same plane to form an integral bottom structural layer.

[Claim 2] The apparatus according to claim 1, wherein the tapered light guiding means has an outer shape that enables them to be closely spliced to each other.

[Clave 3] The apparatus according to claim 1, wherein the light receiving panel is a flat light transmissive panel or a concentrated Fresnel lens.

[Claim 4] The apparatus according to claim 1, wherein

Each of the light receiving units further includes a set of light guide vanes disposed under the light receiving panel, the light guide vanes being inclined from the light receiving panel toward a center of the light energy utilizing device; or the device further includes a a group of light guide vanes disposed above all of the light receiving panels, the light guide vanes being inclined toward a center of the device;

At least one side of the light guide vane facing the upper portion is a reflective surface capable of reflecting light for concentrating the light incident from the upper portion toward the center of the lower portion.

[Claim 5] The apparatus according to any one of claims 1 to 4, characterized in that each of the light receiving units is formed into a closed structure.

[Claim 6] The apparatus according to claim 5, wherein

a closed structure formed by each light receiving unit is filled with a gas having a refractive index greater than 1, or The enclosed structure formed by each of the light-receiving units is filled with a shielding gas that is exposed in the shielding gas by a surface of the device for energy conversion or utilization of the received light energy.

A device according to any one of claims 1 to 4, characterized in that

The bottom structure layer further includes at least one thermal energy device disposed on a back side of the at least one light energy utilization device and thermally coupled to the light energy utilizing device;

The thermal energy consumer is selected from the group consisting of a thermoelectric conversion device and a thermal energy absorbing device.

A device according to any one of claims 1 to 4, characterized in that

The device is formed as three structural layers, respectively: an integral top structural layer formed by the light-receiving panels of all the light-receiving units, an integral central structural layer formed by the tapered light guiding devices of all the light-receiving units, and all the light-receiving units The light energy utilizes the overall bottom structure layer formed by the device.

The apparatus according to any one of claims 1 to 4, further comprising a vibrator including a vibrating element and a driving circuit thereof

The vibrating element is mechanically coupled to at least one of the light receiving panels of the apparatus to cause it to vibrate,

The vibrator is selected from the group consisting of a piezoelectric vibrator and an electromagnetic vibrator.

The device of claim 9 wherein:

The driving circuit includes at least one inductance element and at least one capacitance element connected in series, a circuit resonance frequency of the driving circuit is matched with a mechanical resonance frequency of the vibration element; when the vibrator is a piezoelectric vibrator, The vibrating element is a piezoelectric element that acts as a capacitive element in the drive circuit;

When the vibrator is an electromagnetic vibrator, the vibrating element is a sheet-like magnetized material, and the driving circuit excites the vibrating element to generate vibration by an inductive element.

The apparatus of claim 4, wherein the apparatus of claim 4, wherein

The vibrator is an ultrasonic motor, and the vibrator of the ultrasonic motor functions as the vibrating element, and the ultrasonic motor is further configured to drive the light guide vane to deflect, thereby changing an inclination angle of the light guide vane.