CN202710834U - Multi-plane reflecting mirror solar energy light condensing device - Google Patents

Abstract

A multi-plane mirror solar concentrating device, comprising: a basic component, a rotating component, a plane mirror support structure and a multi-plane mirror array; the multi-plane mirror array is composed of a plurality of independent single-block plane mirrors; the plane support structure consists of "H"-shaped main frame and a number of parallel support bars fixed on the "H"-shaped main frame; multiple independent single-block plane mirrors are connected to the parallel support bars through universal joint brackets; rotating parts include electric turntables And the electric push rod; the pitch angle of the "H" type main frame is pushed by the telescoping of the electric push rod, so that the multi-plane reflector array tracks the sun's altitude angle; the multi-plane reflector array tracks the sun's azimuth angle through the rotation of the electric turntable. The utility model can obtain the most uniform focused light spot, fundamentally solves the problem of efficiency drop caused by uneven light concentration in photovoltaic power generation, and has a simple structure and low cost.

Description

A multi-plane mirror solar concentrating device

technical field

The utility model relates to a solar concentrating power generation device, in particular to a multi-plane mirror solar concentrating device for solar power generation, which belongs to the solar energy utilization technology.

Background technique

The energy issue is the primary issue of social and economic development. In recent years, along with the rapid economic development, my country's demand for energy presents a trend of rapid growth. At present, due to the low efficiency of energy utilization in my country and the excessive use of fossil energy such as coal, my country's energy problems have become more severe and environmental damage has become increasingly serious, which has greatly restricted my country's economic development. Solar energy is an important alternative to traditional energy because of its renewable and environmentally friendly advantages.

As we all know, solar photovoltaic power generation has been widely used as the most promising technology in solar energy utilization. However, the high cost of photovoltaic power generation makes it a relatively low proportion in the entire energy structure. How to reduce the cost of photovoltaic power generation has become an important research topic for countries. topic. Among them, CPV (Concentrator Photovoltaic) power generation technology has great potential to reduce the cost of photovoltaic power generation, which has attracted great attention from scientists all over the world. Recently, it has become a research hotspot and has established many demonstrations.

Solar concentrating technology is the key to solar concentrating power generation. Solar concentrating can be divided into reflection or refraction according to the way the light gathers; it can be divided into point, line or non-concentrating according to the type of focus; it can be divided into fixed according to the position of the concentrator. Concentrators and Tracking Concentrators. The reflective point concentrator with tracking has been highly praised by many scholars at home and abroad in recent years because it can provide high-magnification concentrator and greatly reduce the battery area required for power generation. At present, the reflective point concentrating technology mainly adopts a parabolic concentrating reflective surface. According to the search by the applicant, the Chinese patent with the publication number CN101980065A proposes a solar reflector with a tension structure. A curved surface is formed on the focus bracket to reflect the concentrated light. In addition, the patent with the publication number CN202049282 proposes a multi-plane mirror parabolic reflective focusing device, which uses the parabolic principle to produce a parabolic surface of the required shape and size, and inlays or fixes N plane lenses of the same size and size on the parabolic surface to form a parabolic reflector .

For the traditional parabolic reflective concentrator, the light intensity distribution in the focus area is a Gaussian distribution, and this uneven light intensity will have a great impact on the power generation efficiency of photovoltaic cells. Due to the different intensity of light on the surface of the photovoltaic cell, a large amount of electric energy will be consumed inside the battery and heat will be generated due to the hot spot effect. If the heat is not dissipated in time at this time, it will cause permanent damage to the photovoltaic cell. In addition, it is more difficult to manufacture the parabolic light-concentrating reflective surface. Although the current advanced technology can produce a more ideal paraboloid, the cost is relatively high, and a series of errors during the installation process are still factors that cannot be ignored. In addition to the parabolic shape of the reflecting mirror, even the supporting structure also needs to be made into a parabolic complex structure, and the manufacturing and installation costs are high. The current concentrators are basically designed with a fixed concentration ratio before production. Once the equipment is installed, the concentration ratio cannot be changed. Even if a design error is found, it will not be able to be adjusted. The flexibility and adaptability are poor. The integral parabolic mirror has a large area, and dust is easy to accumulate, and the wind resistance has a huge impact during work, and the wind resistance is limited. Therefore, a new solar concentrating device is needed to overcome many of the above-mentioned problems.

Utility model content

The technical solution of the utility model is to overcome the deficiencies of the prior art and provide a multi-plane mirror solar concentrating device for solar power generation, which can obtain the most uniform focusing spot and fundamentally solve the problem of uneven concentration in photovoltaic power generation The problem of reduced efficiency is caused, and the structure is simple and the cost is low.

The technical solution of the utility model, the multi-plane reflector solar energy concentrating device, includes: a basic part fixed on the ground, a rotating part installed on the basic part and capable of driving the multi-plane reflector array to track the sun, and connected with the rotating part The plane mirror support structure, and the multi-plane mirror array connected on the plane support structure; the multi-plane mirror array is composed of a plurality of independent single-block plane mirrors; the plane support structure is composed of "H" type main frame It is composed of a number of parallel support bars fixed on the "H"-shaped main frame; the single planar mirror is connected with the parallel support bars through a universal joint bracket and arranged on the parallel support bars; the rotating parts include motorized Turntable and electric push rod; the telescopic end on the top of the electric push rod is connected to the parallel support bar, and the pitch angle of the "H"-shaped main frame is pushed through the telescopic movement of the electric push rod, so that the multi-plane reflector array can track the sun's elevation angle; the electric turntable It is fixed with the "H"-shaped main frame, and the "H"-shaped main frame is driven to rotate 360 degrees in the direction of the water surface through the rotation of the electric turntable, so that the multi-plane reflector array can track the azimuth of the sun.

The universal joint bracket is composed of upper, middle and lower sections, and each section is connected by a screw; the top of the upper section has a round table, and the bottom has a "concave" groove; the top of the middle section is "convex", and the protruding part is just in line with the The 'concave' grooves at the bottom of the upper section are engaged, and the two sections are connected and fixed by screws after engagement. There is also a 'concave' groove at the bottom of the middle section, but this 'concave' groove is perpendicular to the 'convex' part of the top; the top of the lower section also has 'Protrusion', the 'convex' part meshes with the 'concave' groove at the bottom of the middle section, the two sections after engagement are also connected and fixed by screws, and a screw hole is provided on the bottom of the lower section.

The top round platform of the upper section of the universal joint bracket is bonded to a single plane reflector, and the bottom surface of the lower section is connected to parallel support bars through screws.

The universal joint bracket can adjust the angle formed by each section through the connection between the 'concave' groove and the 'convex' protrusion, and can make the single flat mirror surface rotate at any angle in two-dimensional space; The control of the depth of the bottom screw screwed into the screw hole can make the single-block flat reflector have a certain range of fine-tuning in the vertical height, so as to prevent mutual collision and occlusion between adjacent single-block flat reflector mirrors.

The position of the universal joint bracket on the parallel support bars can be changed, so as to make corresponding adjustments according to the single plane reflectors with different areas, and maximize the use of the lighting surface space.

Each single planar reflector in the multi-plane reflector array uses common flat glass with a silver-plated reflective surface as a reflective component.

Compared with the prior art, the utility model has the following advantages:

(1) The utility model solves the influence of Gaussian distribution of light intensity in the traditional point-focus concentrator on the photovoltaic cells after the multi-plane mirror reflective array is used for concentrating light. The light intensity distribution in the focal spot area is uniform, and the most uniform Focusing on the light spot fundamentally solves the problem of efficiency drop caused by uneven light concentration in photovoltaic power generation.

(2) The utility model replaces the large curved reflector with a combination of small planar reflectors; the multi-mirror is confocal, and the concentration ratio can be adjusted flexibly.

(3) The utility model abandons the complex parabolic frame structure in the traditional point concentrator, and adopts a simple linear structure, which is simple in structure and low in cost. The reflector is connected to the supporting structure through a universal joint bracket, which is easy to install and adjust .

(4) The connection, angle adjustment and focusing between the reflecting mirror surface and the supporting frame of the utility model are all completed through the universal joint bracket, which can make the mirror surface rotate at any angle in the two-dimensional space, accurately focus, and also There is a certain range of fine-tuning in the vertical height to prevent mutual collision and occlusion of adjacent mirror surfaces; and the position of the universal joint bracket on the parallel support bars can be changed in order to make corresponding adjustments according to different areas and shapes of reflective mirror surfaces. Maximize the use of the lighting surface space.

(5) The lighting plane of the utility model adopts a two-dimensional tracking method, which can stably track the sun's elevation angle and azimuth angle, and obtain incident sunlight to the maximum extent.

(6) The concentrating multiple of the multi-plane mirror reflective concentrating device of the utility model, that is, the adjustment method of the concentrating ratio, is convenient and flexible to adjust, and is completed by increasing or deleting the number of multi-plane mirror reflective arrays, which breaks through the traditional method of fixing a single device. The limitation of the concentration ratio can change the concentration ratio according to the actual situation, thus greatly reducing the cost of use.

(7) The single flat mirror in the utility model adopts ordinary flat glass as the reflecting part, which greatly reduces the production cost compared with the curved mirror; and there is a certain gap between each single flat mirror, which greatly reduces the installation time. Wind resistance for field work.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram according to the utility model;

Fig. 2 is a schematic diagram of the basic components fixed on the ground of the device shown in Fig. 1;

Fig. 3 is a schematic diagram of a universal joint bracket according to the present invention;

Fig. 4 is a schematic diagram of an array arrangement of multi-plane mirrors according to an embodiment of the utility model shown in Fig. 1;

Fig. 5 is a working schematic diagram of a multi-plane reflector array according to an embodiment of the utility model shown in Fig. 1;

Fig. 6 is a schematic diagram of light intensity distribution at the focal spot position of the light concentrating device according to an embodiment of the present invention shown in Fig. 1;

Fig. 7 is a schematic cross-sectional view of the parallel support bars shown in Fig. 1 .

Among them: the basic part 110 fixed on the ground; the main column 111; the base 112; the rotating part 120; the electric turntable 121; the electric push rod 122; Plane mirror array 140; single block plane mirror 141; universal joint bracket 142; screw 143; focal spot 151;

Detailed ways

In the following description, various aspects of the invention will be described. For purposes of explanation, specific configurations and details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without the specific details mentioned herein. Furthermore, well-known features may be omitted or simplified in order not to obscure the invention.

With reference to Fig. 1 now, it is the construction of embodiment of the present utility model and the three-dimensional schematic diagram of work. As shown in FIG. 1 , the multi-plane mirror light concentrating device of the present invention includes: a base component 110 fixed on the ground, a rotating component 120 , a plane mirror support structure 130 and a multi-plane mirror array 140 .

The base components 110 fixed on the ground are the main column 111 and the base 112 with positioning screw holes under the column, see FIG. 2 .

The rotating component 120 includes an electric turntable 121 and an electric push rod 122 installed on the main column 111 . The telescopic end of the top of the electric push rod 122 is connected with the 'H' main frame 131, and the telescopic end of the electric push rod 122 drives the adjustment of the pitch angle of the 'H' main frame 131, so that the direction of the multi-plane reflector array 140 lighting surface Adjust with the change of the sun altitude to achieve the purpose of tracking the sun altitude angle; the electric turntable 121 is fixed to the "H" main frame 131, and the "H" main frame 131 is driven to rotate 360 degrees in the direction of the water surface by the rotation of the electric turntable 121. Therefore, the direction of the lighting surface of the multi-plane reflector array 140 is adjusted according to the change of the sun azimuth, and the purpose of tracking the sun azimuth is realized.

As shown in FIGS. 1 and 4 , in the multi-plane mirror array 140 , the multi-plane mirror array 140 is composed of a plurality of independent single-block plane mirrors 141 . The planar support structure 130 is composed of an "H"-shaped main frame 131 and several parallel support bars 132 fixed on the "H"-shaped main frame. The single planar reflector 141 is connected with the parallel support bar 132 through the universal joint bracket 142, wherein one end of the universal joint support 142 is bonded with the single block planar reflector 141 by bonding, and the other end is connected with the parallel support bar through the screw rod 143. 132 are connected. The array of multi-plane reflectors 140 is arranged on the parallel support bars 132, and the arrangement of the array of multi-plane reflectors 140 is designed according to actual needs, such as light-gathering multiple, spatial position and appearance requirements, as shown in Figure 4, for example, in this embodiment A total of 605 square single-block plane mirrors 141 are arranged to form a multi-plane mirror array 140, but when the utility model is implemented, it is not limited to the arrangement shown in Figure 4, and the number and parallelism of the above-mentioned single-block plane mirrors 141 are changed. The number of support bars 132 can also achieve the same effect.

The single flat mirror 141 can use ordinary flat glass as the reflecting part, and the surface is plated with silver as the reflecting surface to improve the reflectivity. If the area of the focal spot 151 needs to be changed, it can be realized by changing the area of the single plane reflector 141 or the focusing position of the single plane reflector 141 in the multi-plane reflector array 140 . For example, as shown in FIG. 6, the area of the area A of the focal spot 151 is the same as the area of the single plane mirror 141, and is the same as the area of the area B of the focal spot 151. It is desired to expand the area A of the original focal spot 151 to twice, namely In the A+B area, the area of the single plane mirror 141 can be changed to double the original area, or the arrangement of the multi-plane mirror array 140 can be changed, that is, half of the number of single blocks in the multi-plane mirror array 140 can be changed. The plane mirror 141 reflects the sunlight to the area A of the focal spot 151 , while the other half of the number of single plane mirrors 141 reflects the sunlight to the area B of the focal spot 151 , both operations can realize the change of the area of the focal spot. However, when the area of the single plane reflector 141 changes, the position of the universal joint bracket 142 on the parallel support bar 132 also needs to be adjusted accordingly, so as to avoid mutual occlusion, collision or mutual distance between adjacent single plane reflectors 141 It is too large to waste space; as shown in Figure 7, the parallel support bar 132 is groove-shaped, and the screw rod 143 and the universal joint bracket 142 can slide on it. When the position of the universal joint support 142 on the parallel support bar 132 is adjusted Finally, the locking screw 143 can fix the position of the universal joint bracket 142 . When the utility model is actually used, the shape of the single plane reflector 141 is not limited to the square shown in Fig. 4, and the shape of the single plane reflector 141 can also be changed according to the actual needs of the object placed at the focal spot 151. achieve the same effect.

As shown in Figure 3, the universal joint bracket 142 is composed of upper, middle and lower sections, and each section is connected by a screw 143; the top of the upper section has a round platform, and the bottom has a "concave" groove; the top of the middle section is "convex". shape, the protruding part just meshes with the 'concave' groove at the bottom of the upper section, and the two sections after engagement are connected and fixed by the screw rod 143, and there is also a 'concave' groove at the bottom of the middle section, but this 'concave' groove and the 'convex' part on the top Vertically; the top of the lower section also has a 'protrusion', and the 'protrusion' part engages with the 'groove' groove at the bottom of the middle section. The top round platform of the upper section of the universal joint bracket 142 is bonded to the single plane reflector 141 , and the bottom surface of the lower section is connected to the parallel support bar 132 through the screw rod 143 .

Adjust the direction of the universal joint bracket 142, so that the solar beam L incident on the single plane reflector 141 is reflected to the focal spot 151 position, as shown in Figure 5, all the single plane reflectors of the whole multiplane reflector array 140 141 all reflect the solar beam L to the position of the focal spot 151, so that the position of the focal spot 151 receives a great light intensity and achieves the purpose of high concentration ratio.

Yet another application of the utility model is as follows. If the same focal spot needs to receive different intensities of light, for example, a square focal spot area, a part can receive 400 times the light intensity, and the other part can only withstand 100 times the light intensity, as shown in Figure 6 shown. At this time, it is only necessary to adjust the distribution of the multi-plane mirror array 140 so that 400 single plane mirrors 141 gather the reflected light to the area A of the focal spot 151 in Figure 6, and another 100 plane mirrors gather the reflected light to the The area B of the middle focal spot 151 can easily realize the allocation of different light concentration ratios in the same focal spot area. The use of the utility model is not limited to the example given in this example.

As mentioned above, the concentrating device of the present invention has a simple structure and can obtain the most uniform focusing spot, which fundamentally solves the problem of efficiency decline caused by uneven concentration in photovoltaic power generation; and the concentration ratio adjustment only needs to be increased or deleted It can be completed by reducing the number of multi-plane mirror arrays, and even more flexibly realizes the distribution of different concentration ratios in the same focal spot area; while the supporting structure of the mirror array abandons the complex parabolic structure of the traditional point-condensing concentrating device, A simple linear frame is adopted and the lighting plane adopts a two-dimensional tracking method, which can stably track the sun's elevation angle and azimuth angle, and obtain the incident sunlight to the maximum; replace the expensive and complicated curved mirror with an inexpensive flat mirror, through the universal joint The bracket is connected with the supporting structure, which is easy to install and adjust.

The above are only preferred embodiments of the present utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any Those skilled in the art, without departing from the scope of the technical solutions of the present utility model, may use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes, but all without departing from the technical solutions of the present utility model The content of the scheme, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model still belong to the scope of the technical solution of the utility model.

Claims (4)

1. plane mirror solar-energy light collector more than a kind, it is characterized in that comprising: the basic components that fix on the ground, be installed in the rotatable parts that can drive many plane mirrors array tracking sun on these basic components, the plane mirror supporting structure that is connected with rotatable parts, and be connected to the many plane reflections lens array on the plane supporting structure; Described many plane reflections lens array is made of a plurality of independently monolithic plane mirrors; Described plane supporting structure is made of with some parallel support bar on being fixed on " H " type main frame " H " type main frame; Described a plurality of independently monolithic plane mirror is arranged on the parallel support bar, and links to each other with described parallel support bar by universal node support; Described rotatable parts comprise electric rotary and electric pushrod; The telescopic end at electric pushrod top links to each other with the supporting construction main frame, the luffing angle of flexible promotion " H " the type main frame by electric pushrod; Electric rotary is fixed with " H " type main frame, rotates " H " type of drive main frame by electric rotary and rotates at water surface direction work 360 degree.

2. many plane mirrors solar-energy light collector according to claim 1 is characterized in that: described universal node support is comprised of upper, middle and lower segment, connects by screw rod between three sections; Individual round platform is arranged at the epimere top, and ' recessed ' groove is arranged at the bottom; The top, stage casing is ' protruding ' shape, and outshot just in time is meshed with ' recessed ' groove of epimere bottom, and after the engagement two sections connect by screw rod and be fixing, and ' recessed ' groove is also arranged at the bottom, stage casing, but this ' recessed ' groove and top ' protruding ' part is perpendicular; The hypomere top has ' protruding ' to rise equally, and ' protruding ' played part and be meshed with ' recessed ' groove of bottom, stage casing, and after the engagement two sections connect by screw rod and be fixing, and the hypomere bottom surface then is provided with a screw.

3. many plane mirrors solar-energy light collector according to claim 2 is characterized in that: described universal node support epimere top round platform and monolithic plane mirror are bonding, and hypomere underrun screw rod is connected with parallel support bar.

4. many plane mirrors solar-energy light collector according to claim 1 is characterized in that: each monolithic plane mirror adopts the ordinary plate glass of silver-plated reflecting surface as reflection part in described many plane reflections lens array.

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