CN101777597B - Composite paraboloidal photovoltaic hot-water heat collector - Google Patents
Composite paraboloidal photovoltaic hot-water heat collector Download PDFInfo
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- CN101777597B CN101777597B CN2010101169061A CN201010116906A CN101777597B CN 101777597 B CN101777597 B CN 101777597B CN 2010101169061 A CN2010101169061 A CN 2010101169061A CN 201010116906 A CN201010116906 A CN 201010116906A CN 101777597 B CN101777597 B CN 101777597B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/60—Thermal-PV hybrids
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Abstract
The invention relates to a composite paraboloidal photovoltaic hot-water heat collector which comprises a curved reflecting mirror and a photovoltaic absorbing body, wherein the cross section of the curved reflecting mirror is in a W shape, the curved surfaces at both sides are paraboloids, the curved surfaces at both sides of the inner bending position of the bottom are circle involute curved surfaces, and the connecting position of the paraboloids and the circle involute curved surfaces carry out smooth transition; a U-shaped pipe of the photovoltaic absorbing body is positioned between two layers of cell boards, and a heat insulating material is filled between the U-shaped pipe and the two layers of cell boards; three-circuit photovoltaic cells are respectively and uniformly distributed on the outer sides of the of the two layers of cell boards, and the two layers of photovoltaic cells are connected in parallel; and the photovoltaic absorbing body is horizontally positioned in the connecting position of the circle involute curved surfaces at both sides of the middle of the curved reflecting mirror. The invention can simultaneously generate power and hot water, improve the efficiency of the photovoltaic cells, the utilization ratio of solar energy in low power focus and the utilization ratio of the solar energy in low power spotlight, has no tracing, is convenient for use and fully utilizes the reflection of light rays.
Description
Technical field
The present invention relates to field of solar energy utilization, exactly is the photovoltaic hot-water heat collector under the low zoom and focus of compound deep trouth parabolic shape.
Background technology
On the one hand, composite parabolic type concentrator CPC (Welford and Winston, 1978) is the non-imaging concentrator of a kind of oligomeric light ratio according to the rim ray principle design, the incident ray of accepting in the angular region can be collected on the absorber by desirable optically focused ratio.Winston (Winston) etc. has pointed out the potentiality of CPC as solar collector.And the composite parabolic type concentrator (CPC) of oligomeric light ratio (less than 3) has great practicality, and they do not need the sun-tracing track can accept than the incident light in the polarizers of big angle scope and assemble.Rui Boer (Rabl) has provided the optics of composite parabolic type concentrator (CPC) and the analytical method of thermal property, to in several composite parabolic type concentrators (CPC) assessments, antivacuum fixedly composite parabolic type concentrator (CPC) the heat collector economic performance of pointing out to have flat board or column type absorber is good.Because composite parabolic type concentrator (CPC) solar energy focalizer has the advantage of many uniquenesses, be widely used on the ground hot water, heating, with fields such as solar energy photocatalytic waste water treatment, solar energy power generating.
On the other hand, with photovoltaic and photo-thermal comprehensive utilization, be the importance that solar energy utilizes.Photovoltaic efficiency can reach 15%, and composite parabolic type concentrator (CPC) solar thermal utilization can reach about 55%, and therefore comprehensive utilization has become a trend.But current composite parabolic type concentrator (CPC) photovoltaic and photothermal utilization about low-concentration is also relatively more rare.Wherein general speculum adopts parabolic type, one deck is a photovoltaic cell above the absorber, weld a water pipe or coil pipe below, the structure that proposes of the inferior Bu Luogelun of Mary (Maria Brogren) for example, the mode of this photovoltaic and photothermal comprehensive utilization can since the increase of optically focused ratio or summer intensity of illumination increase still can cause the photovoltaic cell heating to a certain extent, thereby cause the decline in generating efficiency and useful life; Though water pipe or coil pipe have played certain cooling effect simultaneously, but what adopt is straight tube, because the continuous rising of water temperature, there is the tangible temperature difference in the water temperature of heat collector import and outlet, thereby can't guarantee that photovoltaic cell is worked on the absorber under same close temperature, cause the decline of whole photovoltaic efficiency.
Summary of the invention
Can't guarantee that for what solve that the inferior Bu Luogelun structure of Mary exists photovoltaic cell is worked on the absorber under same close temperature, cause the problem of whole photovoltaic decrease in efficiency, the invention provides a kind of new construction composite paraboloidal photovoltaic hot-water heat collector.
The technology solution that realizes above-mentioned purpose is such: introduced the mode that speculum adopts parabolic type and circle involute type to combine among the present invention, absorber is the two-layer photovoltaic cells in top and bottom, adopt the cooling of U type pipe simultaneously, under equal optically focused ratio, significantly reduced the working temperature of battery like this, the useful life of further having improved photovoltaic efficiency and battery.
The concrete structure design is as follows:
Composite paraboloidal photovoltaic hot-water heat collector comprises curved reflector and photovoltaic absorbers;
Described curved reflector cross section is the W type, and the curved surface of its both sides is parabolic, and two N-Side surfs of crook are the circle involute curved surface in its bottom, parabolic and circle involute curved surface junction smooth transition;
Described photovoltaic absorbers comprises U type pipe, and U type pipe is filled between U type pipe and the two-layer cell panel and is provided with heat insulator between two-layer cell panel; The lateral surface of two-layer cell panel is laid with three road photovoltaic cells respectively, is in parallel between the two-layer photovoltaic cell;
Described photovoltaic absorbers level is positioned at circle involute curved surface junction, both sides, curved reflector middle part.
Described two-layer cell panel is thin aluminum sheet.
Described three road photovoltaic cell positions are located at interval at middle part, the both sides of U type pipe respectively.
Described photovoltaic cell two sides are respectively equipped with transparent compound fluoroplastics film, and the transparent compound fluoroplastics film in its outside is provided with glass cover-plate.
Described glass cover-plate material is a transmitance greater than 0.9 high permeability glass.
The present invention's useful technique effect compared with prior art embodies in the following areas:
(1) mode that adopts a kind of curved reflector that has parabola and the existing combination of circle involute to combine with photovoltaic and photothermal, low zoom and focus does not need to follow the tracks of, and has saved a large amount of tracking costs, utilizes solar power generation simultaneously and hot water is provided.
(2) absorber partly comprises the two sides cell panel in the compound parabolic collector of the present invention, reflection path according to light path, can make full use of luminous energy, further improve the photovoltaic/thermal comprehensive utilization ratio, wherein the light part of polished object line style mirror reflects is absorbed by the upper strata photovoltaic cell, a part of process circle involute mirror reflects is absorbed by lower floor's photovoltaic cell, and the unit cells caloric value reduces than the single face battery like this, provides possibility for further improving the optically focused ratio.
(3) two-layer cell panel adopts mode in parallel respectively, has avoided because the power conversion efficiency (pce) that light-intensity difference causes descends, thereby has further improved generating efficiency.
(4) laser welding U type copper pipe and thin aluminum sheet between the two-layer photovoltaic cell, import of U type copper pipe and outlet are in a side, when the reduction battery temperature is produced hot water, make the temperature gradient difference of absorber much smaller than straight tube, guaranteed that the photovoltaic cell working temperature is close, helped every photovoltaic cell and keep close stabilization efficiency.
(5) U type copper pipe is imported and exported in a direction, and pipeline is easy to connect, has reduced the comb circuit, has saved material.
Description of drawings
Fig. 1 is a structural representation of the present invention,
Fig. 2 is a photovoltaic absorbers structural representation of the present invention,
Fig. 3 is a fundamental diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is done to describe further by embodiment.
Embodiment:
Referring to Fig. 1, composite paraboloidal photovoltaic hot-water heat collector comprises curved reflector and photovoltaic absorbers 2.
The curved reflector cross section is the W type, and is positioned at framework 1; The curved surface of its both sides is a parabola 3, and two N-Side surfs of crook are circle involute curved surface 4 in its bottom, parabolic and circle involute curved surface junction smooth transition.
Referring to Fig. 2, photovoltaic absorbers 2 comprises U type pipe 7, and U type pipe 7 is between two-layer cell panel 8, and cell panel 8 is a thin aluminum sheet.Fill between U type pipe 7 and the two-layer cell panel 8 and be provided with heat insulator 5; The lateral surface of two-layer cell panel 8 is uniform respectively to be equipped with middle part, the both sides that three road photovoltaic cells, 6, three road photovoltaic cells 6 are located at interval at U type pipe 7 respectively, and two-layer photovoltaic cell 6 is in parallel.Photovoltaic absorbers 2 levels are positioned at circle involute curved surface junction, both sides, curved reflector middle part.
The manufacture craft of composite paraboloidal photovoltaic hot-water heat collector may further comprise the steps:
(1), makes photovoltaic module, the photovoltaic cell both sides evenly are coated with full polyethylene vinyl acetate ester EVA simultaneously, (EthylVinyl Acetate), place again between the two-layer transparent compound fluoroplastics film TPT (Tedlar Polyester Tedlar), the upper strata is a high permeability glass, and placing vacuum laminator laminated into type the integral body, no bubble can continue in the middle of checking;
(2), make absorber, U type copper pipe both sides are connected two thin aluminum sheets by Laser Welding respectively, selective coating is coated on the thin aluminum sheet surface, evenly is coated with full silica gel on the thin aluminum sheet surface then, above photovoltaic module is sticked on.
(3), after 24 hours, check whether photovoltaic module and thin aluminum sheet surface paste intactly, and whether photovoltaic module leaks electricity; Then between two thin aluminum sheets, i.e. U type tube wall side filling heat insulating wall.
(4), photovoltaic absorbers is horizontally fixed on circle involute curved surface junction, both sides, curved reflector middle part.
As shown in Figure 3, sunlight is through the upper surface of a part of direct irradiation in parabolic 3 curved mirrors reflection back at absorber, and the reflection of part process circle involute curved surface 4 curved mirrors impinges upon the lower surface of absorber.The absorber upper and lower surface is posted photovoltaic cell respectively, and the part sunlight is absorbed by photovoltaic cell, produces electric energy; Major part changes into heat energy and is taken away by the water in the U type copper pipe, thereby produces hot water.On the one hand, improved solar photoelectric/photothermal overall efficiency on the unit receiving area; On the other hand,, reduce photovoltaic battery temperature, improve its photoelectric efficiency by the fluid cooling.
The mode that curved reflector of the present invention adopts parabolic curve and circle involute to combine, sunlight major part through the parabolic curve emission is absorbed by the upper strata battery, sunlight through the reflection of circle involute curve is absorbed by lower floor's photovoltaic cell, it can produce electric power and hot water simultaneously, better photovoltaic cell is cooled off, improved the efficient of photovoltaic cell.According to the peculiar structure of composite parabolic, design the double-deck photovoltaic cell structure of carrying U type pipe secretly simultaneously, made full use of the reflection of light, improved solar energy utilization rate under the low-concentration.
Claims (5)
1. composite paraboloidal photovoltaic hot-water heat collector comprises curved reflector and photovoltaic absorbers, it is characterized in that:
Described curved reflector cross section is the W type, and the curved surface of its both sides is parabolic, and two N-Side surfs of crook are the circle involute curved surface in its bottom, parabolic and circle involute curved surface junction smooth transition;
Described photovoltaic absorbers comprises U type pipe, and U type pipe is filled between U type pipe and the two-layer cell panel and is provided with heat insulator between two-layer cell panel; The lateral surface of two-layer cell panel is laid with three road photovoltaic cells respectively, is in parallel between the two-layer up and down photovoltaic cell;
Described photovoltaic absorbers level is positioned at circle involute curved surface junction, both sides, curved reflector middle part.
2. composite paraboloidal photovoltaic hot-water heat collector according to claim 1 is characterized in that: described two-layer cell panel is thin aluminum sheet.
3. composite paraboloidal photovoltaic hot-water heat collector according to claim 1 is characterized in that: described three road photovoltaic cell positions are located at interval at middle part, the both sides of U type pipe respectively.
4. composite paraboloidal photovoltaic hot-water heat collector according to claim 1 is characterized in that: described photovoltaic cell two sides are respectively equipped with transparent compound fluoroplastics film, and the transparent compound fluoroplastics film in its outside is provided with glass cover-plate.
5. composite paraboloidal photovoltaic hot-water heat collector according to claim 4 is characterized in that: described glass cover-plate material is a transmitance greater than 0.9 high permeability glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101169061A CN101777597B (en) | 2010-01-29 | 2010-01-29 | Composite paraboloidal photovoltaic hot-water heat collector |
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| CN2010101169061A CN101777597B (en) | 2010-01-29 | 2010-01-29 | Composite paraboloidal photovoltaic hot-water heat collector |
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| CN101777597A CN101777597A (en) | 2010-07-14 |
| CN101777597B true CN101777597B (en) | 2011-06-15 |
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| CN2010101169061A Expired - Fee Related CN101777597B (en) | 2010-01-29 | 2010-01-29 | Composite paraboloidal photovoltaic hot-water heat collector |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102779885A (en) * | 2012-07-02 | 2012-11-14 | 西安交通大学 | Solar energy concentrating frequency dividing photovoltaic photo-thermal cogeneration device |
| CN104570307A (en) * | 2014-12-29 | 2015-04-29 | 武汉开锐智能设备有限公司 | Light-gathering structure of infrared heater |
| CN106979546A (en) * | 2016-01-19 | 2017-07-25 | 华北电力大学 | A kind of heat pipe-type concentrating photovoltaic photo-thermal heating system |
| CN106651627B (en) * | 2016-09-12 | 2020-05-19 | 西安交通大学 | Thermoelectric performance evaluation method of low-concentration photovoltaic photo-thermal system |
| CN107202354A (en) * | 2017-07-14 | 2017-09-26 | 西北农林科技大学 | A kind of high-efficiency solar anaerobic reactor heating plant |
| ES2746036A1 (en) * | 2018-09-04 | 2020-03-04 | Ursu Silvia Mihaela Toader | PHOTOVOLTAIC THERMAL ALTERNATIVE HYBRID SOLAR CAPTION SYSTEM (Machine-translation by Google Translate, not legally binding) |
| CN112366505B (en) * | 2020-10-30 | 2022-11-08 | 中国科学院上海光学精密机械研究所 | Xenon lamp array type involute parabolic composite reflection cavity |
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