CN201550050U - Double parabolic cylindrical reflection light-gathering solar photo-voltaic generation component - Google Patents

Abstract

The utility model discloses a double parabolic cylindrical reflection light-gathering solar photo-voltaic generation component, which comprises a primary reflecting body, a secondary reflecting body, a transparent protection cover board, a photo-voltaic cell, a conductive connecting wire, a radiator substrate and a framework packager, wherein a primary parabolic cylindrical reflector is arranged on the primary reflecting body, and a secondary parabolic cylindrical reflector is arranged on the secondary reflecting body. The surface of the photo-voltaic cell is led to form light-gathering lighting with the same radiation intensity and the same inclined angle with the surface of the photo-voltaic cell through proper combined arrangement and use of the two parabolic cylindrical reflectors, thereby improving the photo-voltaic conversion efficiency and even higher times of light-gathering ratio of a normal photo-voltaic battery with unit area, and achieving the purpose of using less photo-voltaic cells under setting power conditions. Therefore, the overall cost of a photo-voltaic generation system can be lowered. The component can be used for tracking one-dimensional inclined shafts, and tracking can improve power generation quantity and further plays the function of lowering the overall cost of the photo-voltaic generation system.

Description

A kind of reflective light-gathering solar photovoltaic power generation assembly with double parabolic cylinders

Technical field

The utility model relates to a kind of structure of concentration photovoltaic system photoelectric conversion module, belongs to technical field of solar utilization technique, particularly a kind of reflective light-gathering solar photovoltaic power generation assembly with double parabolic cylinders.

Background technology

Tap a new source of energy and renewable and clean energy resource be the common issue that the whole world faces, new energy development with utilize in the mode, photovoltaic generation attracts tremendous attention.At present, photovoltaic generation mainly adopts the ordinary flat photovoltaic generating system.The ordinary flat photovoltaic generating system is directly placed (angled with ground) with dull and stereotyped solar module towards low latitudes, reaches the purpose of using solar power generation thereby form the solar energy photovoltaic array in series-parallel mode.In the ordinary flat photovoltaic generating system, the cost of solar cell accounts for significant proportion in the system synthesis basis, because the price comparison of solar cell is high, thereby has directly caused the cost of system too high.At present, the conversion efficiency of the photovoltaic cell of use is low, cost is high, is the not one of the main reasons of wide popularization and application on market of photovoltaic generation.

Photovoltaic cell can be worked under quite high light intensity condition, uses photovoltaic cell to carry out opto-electronic conversion under the optically focused condition, is one of effective way that reduces cost for solar power generation.Adopt concentration photovoltaic system, can reduce the required cell area of given power, partly replace expensive solar cell with comparatively cheap concentrator.In this system, the total cost of solar cell can significantly reduce, and the total cost of electricity generation system also descends thereupon.

If concentrator cell is worked under the sun light intensity condition of 300 times or higher multiple, and can reach quite high photoelectric conversion efficiency (25%-36%).But, the photovoltaic cell of this high power concentrator needs expensive semi-conducting material (indium gallium or purification high purity silicon etc.), and processing technology is also very complicated, when using under the optically focused condition, it is very high that the temperature of photovoltaic cell can become, and needs cooling technology harsher and that efficient is very high.Especially under the silicon materials photovoltaic cell, constant situation that photovoltaic battery temperature raises in, can cause open circuit voltage to reduce at intensity of sunshine, reduced rate is-0.4%/K～-0.5%/K, thus the power output of silicon materials photovoltaic cell is also reduced.Cooling device can increase the cost of photovoltaic generating system, is not suitable for general occasion and promotes the use of.If concentrator cell is worked under with interior sun light intensity condition at 3～10 times, can save 66～90% solar cell.In the temperature that solar cell produces, can carry out efficiently radiates heat by the mode of using conventional fin.Therefore, this concentrator cell has certain advantage aspect the reduction cost of electricity-generating.

Be called in the patent document of " making the solar-energy photovoltaic cell generating device of realizing several times optically focused with light funnel bounce technique on earth " in disclosed patent No. ZL200510200596.0, name, this device can be realized 3～7 times optically focused ratio in theory, yet under reality, consider factors such as size and reflection loss, can only reach 3.5～4.3 times optically focused ratio.If reach described 7 times of optically focused ratios, the size of its reflecting surface needs endless just can accomplish, this obviously is impracticable in production application.That is to say that this structure can not realize about 10 times in actual production, and realize size change between the higher multiple, to adapt to different temperature and photoenvironment.This device need carry out two-dimensional tracking just can carry out operate as normal, promptly need follow the tracks of at solar azimuth and elevation angle both direction, and system complex degree and cost that this has increased photovoltaic generation undoubtedly greatly are unfavorable for promoting the use of.

Transmission optically focused also is an approach that realizes higher multiple, and it also is very noticeable reducing the cost that gets off owing to a large amount of productions of Fresnel Lenses.Yet from the angle of technology, the uniformity of the optically focused light intensity of Fresnel Lenses on certain surface is less better relatively.From industrialized viewpoint of measures, than bounce technique, the cost of special lens still is higher than the cost with high reflectivity mirror face.

Summary of the invention

The purpose of this utility model is to provide a kind of reflective light-gathering solar photovoltaic power generation assembly with double parabolic cylinders, each point has more uniform radiation intensity on the photovoltaic cell surface, help improving the whole photoelectric conversion efficiency of photovoltaic cell, be applicable to the one-dimensional inclined shaft tracking application.

The purpose of this utility model is achieved in that a kind of reflective light-gathering solar photovoltaic power generation assembly with double parabolic cylinders, mainly form, fixedly become an electrification component by encapsulating by refractive body, secondary reflecting body, transparent protective cover plate, photovoltaic cell, conductive connecting line, radiator base plate, a framework encapsulation.Photovoltaic cell conducts electricity connection by corresponding conductive connecting line, is packed on the radiator base plate by glued membrane, insulate by glued membrane between photovoltaic cell, conductive connecting line and the radiator base plate.Fix more than one photovoltaic cell on the radiator base plate, and together be assembled into electric energy output device with conductive connecting line.One time refractive body is arranged between transparent protective cover plate and the photovoltaic cell.One group of above parabolic reflector is set, the corresponding secondary parabolic reflector of a parabolic reflector on the refractive body.The secondary parabolic reflector is arranged on the secondary reflecting body, and two secondary parabolic reflectors are set on each secondary reflecting body.The corresponding photovoltaic cell in parabolic reflector bottom.One time refractive body top opening part installs covering by transparent protective cover plate.There is fin at the back side of radiator base plate, position between the photovoltaic cell that installs on fin and the radiator base plate is corresponding, the heat that photovoltaic cell is produced owing to optically focused, dispel the heat by the fin behind the radiator base plate, guarantee photovoltaic cell operate as normal under suitable temperature conditions.Photovoltaic cell is positioned at the bottom of a parabolic reflector, makes the back of photovoltaic cell have bigger space to install the radiator of larger volume, improves the radiating efficiency of photovoltaic cell.

A parabolic reflector and optically focused reflecting curved surface group of a common composition of secondary parabolic reflector, and focal line coincidence, directrix is parallel, and the directrix plane at directrix place is also parallel.The opening edge of two mirror surfaces is in same plane along parallel with paraboloidal directrix plane respectively with focal line.One time parabolic reflector is provided with opening near the place, summit, and photovoltaic cell is arranged on opening part, and the surface is parallel with the directrix plane of a parabolic reflector.When perpendicular to the light of photovoltaic cell during from the opening edge of two mirror surfaces along interior regional incident, through two secondary reflections of parabolic reflector and secondary parabolic reflector, light arrives the surface of photovoltaic cell.According to optical knowledge as can be known, arrive the optically focused light of the light of photovoltaic cell, its radiation intensity is greater than the radiation intensity of incident light; The Surface Vertical of optically focused light and photovoltaic cell, and a bit have arbitrarily an identical optically focused radiation intensity on the photovoltaic cell surface.

Two optically focused reflecting curved surface groups are made up of two identical parabolic reflector secondary parabolic reflectors identical with two, corresponding respectively focal line separately.Two groups of optically focused reflecting curved surface groups are symmetrical arranged, and the outer edge of four parabolic reflector faces and two focal lines are in the same plane, and parallel with its directrix plane.Article two, focal line is parallel and at a distance of certain distance.Structure being set using more large-area photovoltaic cell like this.

Parabolic reflector, secondary parabolic reflector, when photovoltaic cell is set to suitable length, the vertical line place plane parallel on incident ray and arbitrary focal line and photovoltaic cell surface, and have with the vertical line on photovoltaic cell surfaceWhen deciding angle, the photovoltaic cell surface still can receive uniform optically focused light, and, can cover the surface of whole photovoltaic cell by the optically focused light of parabolic reflector and the reflection of secondary parabolic reflector.Make the focal line of a parabolic reflector be arranged on the position parallel with earth's axis, and make sunray be parallel to the plane of the vertical line on arbitrary focal line and photovoltaic cell surface all the time, the sun is positioned at the opening direction of a parabolic reflector, and then the maximum of the angle of sunray and photovoltaic cell surface vertical line is ± 23.45 °.The setting of a parabolic reflector, secondary parabolic reflector and the photovoltaic cell of suitable length can be implemented in when in the whole year solar radiation being arranged, and whole photovoltaic battery surface can receive the optically focused radius all the time, and the radiation intensity of every bit is identical.These characteristics are suitable for the one-dimensional inclined shaft tracking concentration solar generating, and are lower with respect to the cost of two-dimensional tracking.Tracking can improve energy output, has also played the effect that reduces the photovoltaic generating system total cost.

Key point of the present utility model is parabolic reflector and secondary parabolic reflector, all without paraboloidal summit.Combined reflected by parabolic reflector and secondary parabolic reflector, when light converges in the photovoltaic cell surface, every bit on the photovoltaic cell surface, all have radiation intensity identical, that be several times as much as the incident sunlight, thereby improved the photoelectric conversion efficiency of the common photovoltaic cell of unit are.The light that photovoltaic cell surface every bit is accepted is identical with the angle between the photovoltaic cell surface, the cosine effect unanimity of photovoltaic cell when photovoltaic generation, thereby also relative raising the whole efficiency of photovoltaic generation.This structure ratio is easier to realize 3～10 times, even the optically focused of higher multiple ratio.Owing to be concentrating to generate power, thereby be implemented under the given power condition, use the purpose of less photovoltaic cell, thereby can reduce the total cost of photovoltaic generating system.When carrying out the one dimension tracking, when the photovoltaic cell of suitable length is arranged on the corresponding optically focused receiving position, but photovoltaic cell is at the equal uniform optically focused light of the receiver radiation intensity whole year simultaneously.

Description of drawings

Fig. 1 is a cross-sectional view of the present utility model;

Fig. 2 is a light path principle schematic diagram of the present utility model;

Fig. 3 is that the utility model is symmetrical arranged structural representation at two groups of parabolic reflectors;

The optically focused principle schematic that Fig. 4 is the utility model when vertical light incident;

Fig. 5 is the optically focused principle schematic of the utility model when oblique ray incident;

Fig. 6 is the plan structure schematic diagram of the utility model side top.

Number in the figure is described as follows:

Refractive body of 1-, 2-secondary reflecting body, the transparent protective cover plate of 3-, 4-photovoltaic cell, 5-glued membrane, 6-conductive connecting line, 7-radiator base plate, 8-fin, 9-framework, parabolic reflector of 10-, 11-secondary parabolic reflector.

Embodiment

As shown in Figure 1, the utility model mainly is made up ofrefractive body 1, secondary reflectingbody 2, transparentprotective cover plate 3,photovoltaic cell 4, conductive connecting line 6, radiator base plate 7,framework 9 encapsulation, fixedly becomes an electrification component by encapsulating.Photovoltaic cell 4 conducts electricity connection by corresponding conductive connecting line 6, be packed on the radiator base plate 7 byglued membrane 5, betweenphotovoltaic cell 4, conductive connecting line 6 and the radiator base plate 7 byglued membrane 5 insulation.Fix more than onephotovoltaic cell 4 on the radiator base plate 7, and together be assembled into electric energy output device with conductive connecting line 6.One timerefractive body 1 is arranged between transparentprotective cover plate 3 and the photovoltaic cell 4.One group of above 10, one parabolic reflector of a parabolic reflector, 10 corresponding secondaryparabolic reflectors 11 are set on the refractive body 1.Secondaryparabolic reflector 11 is arranged on the secondary reflectingbody 2, and two secondaryparabolic reflectors 11 are set on each secondary reflecting body 2.The correspondingphotovoltaic cell 4 inparabolic reflector 11 bottoms.One timerefractive body 1 top opening part installs covering by transparentprotective cover plate 3, transparentprotective cover plate 3 requires light transmittance very high, can be with hardening or the toughened glass manufacturing, perhaps make with optical plastic, requirement has waterproof and dustproof and suitable impact resistance function, to adapt to various outdoor harsh weather.There is fin 8 at the back side of radiator base plate 7, position between thephotovoltaic cell 4 that installs onfin 8 and the radiator base plate 7 is corresponding, the heat thatphotovoltaic cell 4 is produced owing to optically focused, dispel the heat by the fin behind the radiator base plate 78, thereby guarantee photovoltaic cell operate as normal under suitable temperature conditions.Photovoltaic cell 4 is positioned at the bottom of aparabolic reflector 10, makes the back ofphotovoltaic cell 4 have bigger space to install the radiator of larger volume, has improved the radiating efficiency ofphotovoltaic cell 4.

As shown in Figure 2, aparabolic reflector 10 and optically focused reflecting curved surface group of secondaryparabolic reflector 11 common compositions, and focal line coincidence, directrix is parallel, and the directrix plane at directrix place is also parallel, and focal line and xy plane meet at the F point.The opening edge of two mirror surfaces is along meeting at D point and D ' point with the xy plane respectively, and is parallel with paraboloidal directrix plane, is in same plane with focal line.One timeparabolic reflector 10 is provided with opening near the place, summit, andphotovoltaic cell 4 is arranged on this opening part, and the surface is parallel with the directrix plane of a parabolic reflector 10.When perpendicular to the light ofphotovoltaic cell 4 opening edge edge from two mirror surfaces, when being the regional incident between D point and at D ', through two secondary reflections of the E ' C ' of the ECD of aparabolic reflector 10 section and secondary parabolic reflector 11 D ' section, the zone between the surperficial OA of light arrival photovoltaic cell 4.According to optical knowledge as can be known, arrive the optically focused light of the light ofphotovoltaic cell 4, its radiation intensity is greater than the radiation intensity of incident light; The Surface Vertical of optically focused light andphotovoltaic cell 4, and a bit have arbitrarily an identical optically focused radiation intensity onphotovoltaic cell 4 surfaces.E ' C ' D ' section of the ECD section of aparabolic reflector 10 and secondaryparabolic reflector 11 is all without paraboloidal summit.

As shown in Figure 3, two optically focused reflecting curved surface groups are made up of two identicalparabolic reflector 10 secondaryparabolic reflectors 11 identical with two, corresponding respectively common focal line F₁F₁' and F₂F₂'.Two groups of optically focused reflecting curved surface groups are symmetrical arranged, the outer edge of four parabolic reflector faces and two focal line F₁F₁' and F₂F₂' be in the same plane, and parallel with its directrix plane.Article two, focal line F₁F₁' and F₂F₂' parallel and at a distance of certain distance.This combination makes the area ofphotovoltaic cell 4 make greatlyyer, and larger areaphotovoltaic cell 4 just utilizes the optically focused light of two groups of optically focused reflecting curved surface groups simultaneously.Rectangle ABB ' A ' is the position atphotovoltaic cell 4 places.As focal line F₁F₁' and F₂F₂' at a distance of suitably apart from the time, the optically focused light thatphotovoltaic cell 4 surperficial every bits all can receive uniformly, radiation intensity is identical.

As shown in Figure 4, in the rectangular extent of light at HIJK, after form incident perpendicular tophotovoltaic cell 4 surfaces, can prove according to above-mentioned condition and optical knowledge, through the reflection ofparabolic reflector 10 and secondaryparabolic reflector 11, optically focused light drops in the rectangular extent shown inphotovoltaic cell 4 surperficial H ' I ' J ' K '.

As shown in Figure 5, vertical line place plane parallel when incident ray and arbitrary focal line andphotovoltaic cell 4 surfaces, and when certain angle being arranged with the vertical line onphotovoltaic cell 4 surfaces, two secondary reflections throughparabolic reflector 10 and secondaryparabolic reflector 11, light through H point and the incident of K point can drop on and K ' point atphotovoltaic cell 4 surperficial H '.When through I point and J point and with the light incident ofphotovoltaic cell 4 Surface Vertical, two secondary reflections throughparabolic reflector 10 and secondaryparabolic reflector 11 can drop on and J ' point atphotovoltaic cell 4 surperficial I '.Can prove according to aforementioned condition and optical knowledge, the equal in length if line segment HK is parallel with line segment IJ, then line segment H ' K ' is parallel and equal with line segment I ' J '.That is to say,parabolic reflector 10, secondaryparabolic reflector 11, whenphotovoltaic cell 4 is set to suitable length, the vertical line place plane parallel on incident ray and arbitrary focal line andphotovoltaic cell 4 surfaces, and when certain angle being arranged with the vertical line onphotovoltaic cell 4 surfaces,photovoltaic cell 4 surfaces still can receive uniform optically focused light, and, can cover the surface of wholephotovoltaic cell 4 by the optically focused light ofparabolic reflector 10 and 11 reflections of secondary parabolic reflector.Simultaneously, the light thatphotovoltaic cell 4 surperficial every bits are accepted is identical with angle betweenphotovoltaic cell 4 surfaces, that is to say, in this case, the cosine effect unanimity ofphotovoltaic cell 4 when photovoltaic generation, thus also relative raising the whole efficiency of photovoltaic generation.

Therefore, make the focal line of aparabolic reflector 10 be arranged on the position parallel with earth's axis, and make sunray be parallel to the plane of the vertical line on arbitrary focal line andphotovoltaic cell 4 surfaces all the time, the sun is positioned at the opening direction of aparabolic reflector 10, and then the maximum of the angle of sunray andphotovoltaic cell 4 surperficial vertical lines is ± 23.45 °.The setting of aparabolic reflector 10, secondaryparabolic reflector 11 and thephotovoltaic cell 4 of suitable length, can be implemented in when in the whole year solar radiation being arranged, wholephotovoltaic cell 4 surfaces can receive the optically focused radius all the time, and the radiation intensity of every bit is identical.These characteristics are suitable for the one-dimensional inclined shaft tracking concentration solar generating.Tracking can improve energy output, has also played the effect that reduces the photovoltaic generating system total cost.

As shown in Figure 6, can observe inner arefractive body 1, secondary reflectingbody 2,photovoltaic cell 4 by the Blast Furnace Top Gas Recovery Turbine Unit (TRT) offramework 9 encapsulation, and be arranged on aparabolic reflector 10 on therefractive body 1 one time.

Claims (5)

1. a reflective light-gathering solar photovoltaic power generation assembly with double parabolic cylinders is made up of a refractive body (1), secondary reflecting body (2), transparent protective cover plate (3), photovoltaic cell (4), conductive connecting line (6), radiator base plate (7), framework (9) encapsulation; Photovoltaic cell (4) conducts electricity connection by corresponding conductive connecting line (6), be packed on the radiator base plate (7) by glued membrane (5), between photovoltaic cell (4), conductive connecting line (6) and the radiator base plate (7) by glued membrane (5) insulation; A radiator base plate (7) is gone up fixing more than one photovoltaic cell (4), and together be assembled into electric energy output device with conductive connecting line (6), it is characterized in that: a refractive body (1) is arranged between transparent protective cover plate (3) and the photovoltaic cell (4), one group of above parabolic reflector (10) is set on the refractive body (1), the corresponding secondary parabolic reflector (11) of a parabolic reflector (10), secondary parabolic reflector (11) is arranged on the secondary reflecting body (2).

2. a kind of reflective light-gathering solar photovoltaic power generation assembly with double parabolic cylinders according to claim 1, it is characterized in that: a parabolic reflector (10) and a secondary parabolic reflector (11) are formed an optically focused reflecting curved surface group, and focal line overlaps, directrix is parallel, the directrix plane at directrix place is also parallel, the opening edge of two mirror surfaces is in same plane along parallel with paraboloidal directrix plane respectively with focal line; A parabolic reflector (10) is provided with opening near the place, summit, is provided with photovoltaic cell (4) at opening part, and photovoltaic cell (4) surface is parallel with the directrix plane of a parabolic reflector (10); A parabolic reflector (10) and secondary parabolic reflector (11) are all without paraboloidal summit.

3. a kind of reflective light-gathering solar photovoltaic power generation assembly with double parabolic cylinders according to claim 2, it is characterized in that: two groups of optically focused reflecting curved surface groups are symmetrical arranged, the outer edge of four parabolic reflector faces and two focal lines are in the same plane, and parallel with its directrix plane; Article two, focal line is parallel and at a distance of certain distance, the optically focused light that the surperficial every bit of photovoltaic cell (4) all can receive uniformly, radiation intensity is identical.

4. a kind of reflective light-gathering solar photovoltaic power generation assembly with double parabolic cylinders according to claim 1, it is characterized in that: a refractive body (1) top opening part installs covering by transparent protective cover plate (3), transparent protective cover plate (3) requires light transmittance very high, with sclerosis or toughened glass manufacturing, perhaps make with optical plastic.

5. a kind of reflective light-gathering solar photovoltaic power generation assembly with double parabolic cylinders according to claim 1, it is characterized in that: there is fin (8) at the back side of radiator base plate (7), position between the photovoltaic cell (4) that installs on fin (8) and the radiator base plate (7) is corresponding, heat owing to optically focused produces photovoltaic cell (4) dispels the heat by the fin (8) behind the radiator base plate (7).

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