CN101266316A - Solar light gathering method and device, solar generating device possessing light gathering device - Google Patents
Solar light gathering method and device, solar generating device possessing light gathering device Download PDFInfo
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- CN101266316A CN101266316A CNA2008100658010A CN200810065801A CN101266316A CN 101266316 A CN101266316 A CN 101266316A CN A2008100658010 A CNA2008100658010 A CN A2008100658010A CN 200810065801 A CN200810065801 A CN 200810065801A CN 101266316 A CN101266316 A CN 101266316A
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- wedge type
- denser medium
- medium body
- optically denser
- sunshine
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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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Abstract
The invention discloses a sunlight condensing method and device, a solar power generating device with the sunlight condensing device to condense the sunlight. The wedge type optically denser medium with refractive index more than that of air or vacuum medium is used in the sunlight condensing method and light incidents from the long rim of the wedge type optically denser medium and is repeatedly reflected by the long rim and another long rim until the light comes to the short rim of the bottom to be condensed. The condensing device is wedge type optically denser medium structure and the condensing surface is the short rim and the solar cell of the solar power generating device with the sunlight condensing device is mounted at the short rim of the wedge type optically denser medium. The invention uses the wedge type optically denser medium with refractive index more than that of air or vacuum medium to condense, when the light incidents from the long rim of the wedge type optically denser medium and is reflected to the short rim, the uniform condensation with higher multiple can be obtained in simple structure and the solar power generating or heating efficiency can be effectively increased.
Description
Technical field
The present invention relates to a kind of method and apparatus of sunshine optically focused, and the device of solar generating that has beam condensing unit.
Background technology
At present Application of Solar Energy obtains favor more and more widely along with global energy crisis aggravation and environmental consciousness raising; and the development bottleneck of solar electrical energy generation, solar energy heating be the sun light tracking condenser system complex structure, cost an arm and a leg, can utilize the key of sun power to be the quality of sun optically focused and tracking level by economical and efficient.Solar energy generating efficiency all will be improved in countries in the world, reduce cost for solar power generation, as the forward position work of scientific research and industrialization.According to the Chinese radio network report on October 7th, 2007, the photovoltaic of the national maximum-norm that builds up in Erdos, the Inner Mongol demonstrate the power station employed be that total installation of generating capacity reaches 205KW by the light funnel light concentrating Blast Furnace Top Gas Recovery Turbine Unit (TRT) of professor Chen Yingtian of Chinese University of Science and Technology invention.This device has been realized 4 times of concentrating to generate power of common photovoltaic silion cell, yet this device is because the complex structure of tracking means has still increased many costs.On the other hand, the solar water heater of market sale now, the hot water temperature of heating is not high enough, also is the result who does not use condenser because the solar tracking device cost is higher.
Summary of the invention
The purpose of this invention is to provide a kind of sunshine concentrating method and device, have the device of solar generating of beam condensing unit, the technical matters that solve is to follow the tracks of sunshine every day, realizes higher multiple optically focused.
The present invention is by the following technical solutions: a kind of sunshine concentrating method, described sunshine concentrating method adopts the wedge type optically denser medium body of refractive index greater than air or vacuum medium, light is after the long limit incident of wedge type optically denser medium body, when another long limit reflection arrives incident length limit once more, incident angle is greater than the angle of total reflection, the past interflection of light through this length limit and another long limit finally arrives the minor face of bottom, obtains the uniform condensing of multiple in incident light.
Sunshine concentrating method of the present invention, but the minimum incident angle of the angle on described wedge type optically denser medium body two long limits and incident light optically focused is α 1=arcsin{n*sin[arcsin (1/n)-2 α 2] relation.
Sunshine concentrating method of the present invention, minute surface is adopted on described another long limit.
Sunshine concentrating method of the present invention, described wedge type optically denser medium body is the right-angle side wedge, and hypotenuse is the light emitting edge, and short right-angle side is the optically focused limit.
Sunshine concentrating method of the present invention, described wedge type optically denser medium body are the structures that the airtight transparent filling liquid of glass transparent solid, transparent epoxy resin solid, transparent plastic solid or member is formed.
A kind of sunshine beam condensing unit, described sunshine beam condensing unit is a wedge type optically denser medium body structure, the refractive index of wedge type optically denser medium body is greater than the refractive index of air or vacuum, but the minimum incident angle of the angle on wedge type optically denser medium body two long limits and incident light optically focused is α 1=arcsin{n*sin[arcsin (1/n)-2 α 2] } relation, caustic surface is the minor face of wedge type.
Sunshine beam condensing unit of the present invention, described wedge type optically denser medium body is the right-angle side wedge, and hypotenuse is the light emitting edge, and short right-angle side is the optically focused limit.
A kind of device of solar generating that has beam condensing unit, have solar cell panel assembly and support, described solar cell panel assembly is arranged on the optically focused limit of the sunshine beam condensing unit that wedge type optically denser medium body constituted, the optically focused limit of sunshine beam condensing unit is the minor face of wedge type optically denser medium body, the refractive index of wedge type optically denser medium body is greater than the refractive index of air or vacuum, but the minimum incident angle of the angle on wedge type optically denser medium body two long limits and incident light optically focused is α 1=arcsin{n*sin[arcsin (1/n)-2 α 2] } relation.
The device of solar generating that has beam condensing unit of the present invention, described wedge type optically denser medium body refractive index is 1.5, and wedge type optically denser medium body is the right-angle side wedge, and hypotenuse is 6: 1 with the length ratio of short right-angle side.
The device of solar generating that has beam condensing unit of the present invention is provided with the angular adjustment bar between described solar cell panel assembly and the support.
The present invention compared with prior art, employing is greater than the close object optically focused of the wedge type light of air or vacuum refractive index, after light is grown limit incident from wedge type light dense body, when reflection arrives transparent long limit once more, incident angle is greater than the angle of total reflection, light finally arrives the minor face of bottom through the past interflection of transparent long limit and minute surface, and obtain the uniform condensing of higher multiple, solar tracking device that need not be expensive, obtain the uniform optically focused of sunshine, simple in structure, greatly reduce cost of products, and can obtain optically focused than the uniform condensing effect that surpasses 4 times, can effectively improve the efficient of solar electrical energy generation or heat supply.
Description of drawings
Fig. 1 has the device of solar generating test synoptic diagram of beam condensing unit for the embodiment of the invention.
Fig. 2-1 is the front view of first embodiment of sunshine beam condensing unit of the present invention.
Fig. 2-1a is the enlarged diagram of the partial structurtes I among Fig. 2-1.
Fig. 2-2 is the left view of Fig. 2-1.
Fig. 2-3 is the vertical view of Fig. 2-1.
Fig. 3-1 is the front view of second embodiment of sunshine beam condensing unit of the present invention.
Fig. 3-1a is the enlarged diagram of the partial structurtes II among Fig. 3-1.
Fig. 3-2 is the left view of Fig. 3-1.
Fig. 3-3 is the vertical view of Fig. 3-1.
Fig. 4 is the light path principle figure of the close object of embodiment of the invention wedge type light.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.As shown in Figure 4, sunshine concentrating method of the present invention, the light path principle that adopts is: the refractive index of supposition square wedge type optically denser medium body is 1.5, and sunshine enters the wedge inclined-plane that optically denser medium constitutes by optically thinner medium, and the long right angle face plating mirror of wedge.When incident light HD with α
1During=36 ° of incident angle incidents, DF is a refract light, respectively through A, and F, the D point is made the straight line AE perpendicular to LN, CF, DG is through the straight line BF of F point work perpendicular to MN.If LM=1, LN=6, ∠ LMN=90 °, α then
29.594 ° of=∠ LNM=arcsin (1/6) ≈,
∵LN⊥CF?MN⊥BF
∵∠BFC＝∠LNM＝α
2
Have according to formula: sin α
1=1.5sin α
3,
α then
3=arcsin (sin α
1/ 1.5)
＝arcsin(sin36°/1.5)
≈23.07°，
The glass angle of total reflection is 41.81 ° of arcsin1/1.5 ≈,
Incident light HD incident angle for the LN face after refraction and backside reflection is α
4,
∵AE∥CF∥DG
∴α
4＝∠AFC，∠CFD＝∠FDG＝α
3
∵ BF is the reflection normal of light DF and AF
∴∠AFB＝∠BFD
α as from the foregoing
4=∠ AFC=∠ AFB+ ∠ BFC
＝∠BFD+α
2
＝∠BFC+∠CFD+α
2
＝α
2+α
3+α
2
＝2*9.594+23.07
41.81 ° of the 42.26 °＞angles of total reflection of ≈.
Because of incident angle is big more, the refraction angle is also big more.So when angle of incidence of sunlight during greater than 36 °, all refract lights all will carry out total reflection when back of the body mirror reflection arrives the LN surface once more, finally arrive the LM face, realize optically focused.
Optically focused ratio: 4.85 times of LNcos36 °/LM ≈ when incident angle is 36 °
Optically focused ratio when incident angle is 48 °: LNcos48 °/LM=4 times, (sun elevation angle and set angle differ 12 °)
Because of changing, the sun elevation angle was no more than 12 ° in maximum 1 month, so when regulating once this device in one month, still can realize the optically focused more than 4 times.
Use the same method in the time of can obtaining wedge type and be the on-right angle type, the wedge type minor face can obtain multiple optically focused.
The sunshine beam condensing unit of the embodiment of the invention, adopt right-angle triangle wedge type optically denser medium body structure, the refractive index of wedge type optically denser medium body is greater than the refractive index of air (vacuum), present embodiment is 1.5, caustic surface is the short right-angle side/face of wedge type, sunshine repeatedly reflects through wedge type long prism square face length limit/face and hypotenuse/face from the transparent long limit/face incident of beam condensing unit, obtains higher multiple optically focused on the short right-angle side/face of wedge type.
Shown in Fig. 2-1,2-1a, 2-2 and 2-3, first embodiment of sunshine beam condensing unit of the present invention is a device of solar generating, this device is made up of solar cell panel assembly 5 and support 6, described solar cell panel assembly 5 is rearranged by wedge type optically denser medium body serial connection, and described wedge type optically denser medium body is formed the closed structure that REFRACTIVE LIQUID 12 is housed by silicon cell minor face 14, the long limit 11 of transparent glass cover and plating mirror corrosion resistant plate 13 and formed.Described wedge type light dense body is installed on the stainless steel angle steel frame 15, described stainless steel angle steel frame 15 underside are connected with angular adjustment bar 7, the other end of described angular adjustment bar 7 is connected on the support 6, is used to regulate winter and angle that summer, device of solar generating was aimed at sunray.Described optically focused wedge wedge section prolongs North and South direction to be arranged, and the wedge depth direction is an east-west direction, follows the tracks of available manual jede Woche or every first quarter moon sun elevation angle North and South direction year and transfers once, need not day tracking.Silicon cell can be taken away by the filling liquid in the wedge type optically denser medium body because of optically focused institute received heat, and is dissipated by back of the body speculum, need not add heat abstractor in addition.For silicon cell when sunlight casts oblique rays on evenly is subjected to light, the size after silion cell is arranged can be less than caustic surface.
Shown in Fig. 3-1,3-1a, 3-2 and 3-3, second embodiment of sunshine beam condensing unit of the present invention is the solar-heating device, this device is made up of solar heat collector panel assembly 8 and support 6, described solar heat collector panel assembly 8 is rearranged by the butt joint of wedge type optically denser medium body minor face, described wedge type optically denser medium body is a wedge type glass bar 22, the joint below of described wedge type glass bar is equipped with triangle copper pipe 24, and the outside surface blackout of triangle copper pipe 24 is handled.The top of described wedge type glass bar 22 is equipped with transparency glass plate 21, and the below of described triangle copper pipe 24 is provided with heat insulating strip 25.Be provided with angular adjustment bar 7 between described solar heat collector panel assembly 8 and the support 6, an end of solar heat collector panel assembly 8 is respectively equipped with water inlet 9 and water delivering orifice 10, thereby current are heated by the sunshine of uniform condensing through back and forth flowing in the triangle copper pipe 24.
Sunshine beam condensing unit of the present invention, solar tracking device that need not be expensive has been saved investment greatly, has been increased generated energy than traditional flat-plate photovoltaic system, and photovoltaic generation, heat cost are effectively reduced.If large-scale application also will have further room for price-cut in sunlight one class area.Have the open-air adaptive faculty that is subjected to weather effect little, superpower, can be Anti-Typhoon, the distinguishing feature of desertification dust storm, anti-hail, anti-sleet.And the present invention is more convenient for safeguarding and changing in design, eradicated the tropical island effect that flat photovoltaic cell component is faced in the use, its popularization and use singly do not utilize on the cost at reduction sun power and have an economic benefit, and the meaning aspect energy-saving and emission-reduction, minimizing environmental pollution is also very great.It is calculated that, under normal circumstances, the electric weight that 1 traditional photovoltaic cell generates at its life period has only 3～4 times that make electric weight that this sheet photovoltaic cell consumed, and the present invention can bring up to this ratio more than 10 times at least, is a kind of industrialization production in enormous quantities and with low cost, reliable and stable novel photovoltaic generation and heating system.
As shown in Figure 1, sunshine beam condensing unit test structure of the present invention, adopting the back side is the transparent wedge type light dense body concentration structure of minute surface, after sunshine H injects from the transparent long limit of wedge type optically denser medium body 2, pass wedge type light dense body 2 and by minute surface 1 reflection at its back side, arrive the minor face 3 of bottom through the reciprocal reflection in wedge type optically denser medium body 2, and obtain the uniform condensing of higher multiple.Solar panel 4 is installed on the clear glass of minor face 3, and its output current is respectively accepts battery sheet short-circuit current A1 and normal illumination battery sheet short-circuit current A2 behind the optically focused.Minute surface 1 can adopt glass mirror, electroplate minute surface or stainless steel mirror, and wedge type light dense body 2 can be the epoxy resin of glass, unguyedization agent or the transparent solid that transparent plastic constitutes, also the structure that can be made up of the airtight transparent filling liquid of member.Solar panel 4 can adopt the series connection of 5 of about 50 * 14mm monocrystalline silicon battery sheets and by the solar panel of epoxy encapsulation.
As shown in Figure 4, but angle α 2 and refractive index n have determined the minimum incident angle α 1 of optically focused and maximum optically focused than i:
α1＝arcsin{n*sin[arcsin(1/n)-2α2]}
i＝cosα1/sinα2
As angle of incidence of light α 1 during greater than minimum incident angle, the maximum order of reflection on the wedge two sides after the incident are: [90-arcsin (sin β 1/n)]/α rounds.
Following examples are by device shown in Figure 1, and experiment records in Shenzhen in afternoon on March 5th, 2008:
Embodiment 1, right-angle triangle wedge type optically denser medium body refractive index 1.5, and beam condensing unit angle α 2 is 8 degree, A1=250mA.
Embodiment 2, refractive index 1.5, and beam condensing unit angle α 2 is 13 degree, A1=150mA
Comparative Examples 1, beam condensing unit of no use, A2=50mA.
Sunshine concentrating method of the present invention and device are adopted in the foregoing description and comparative example explanation, can realize uniform condensing, improve the generating efficiency of device of solar generating.
Claims (10)
1. sunshine concentrating method, it is characterized in that: described sunshine concentrating method adopts the wedge type optically denser medium body of refractive index greater than air or vacuum medium, light is after the long limit incident of wedge type optically denser medium body, when another long limit reflection arrives incident length limit once more, incident angle is greater than the angle of total reflection, the past interflection of light through this length limit and another long limit finally arrives the minor face of bottom, obtains the uniform condensing of multiple in incident light.
2. sunshine concentrating method according to claim 1 is characterized in that: but the minimum incident angle of the angle on described wedge type optically denser medium body two long limits and incident light optically focused is α 1=arcsin{n*sin[arcsin (1/n)-2 α 2] relation.
3. sunshine concentrating method according to claim 2 is characterized in that: minute surface is adopted on described another long limit.
4. sunshine concentrating method according to claim 3 is characterized in that: described wedge type optically denser medium body is the right-angle side wedge, and hypotenuse is the light emitting edge, and short right-angle side is the optically focused limit.
5. sunshine concentrating method according to claim 4 is characterized in that: described wedge type optically denser medium body is the structure that the airtight transparent filling liquid of glass transparent solid, transparent epoxy resin solid, transparent plastic solid or member is formed.
6. sunshine beam condensing unit, it is characterized in that: described sunshine beam condensing unit is a wedge type optically denser medium body structure, the refractive index of wedge type optically denser medium body is greater than the refractive index of air or vacuum, but the minimum incident angle of the angle on wedge type optically denser medium body two long limits and incident light optically focused is α 1=arcsin{n*sin[arcsin (1/n)-2 α 2] } relation, caustic surface is the minor face of wedge type.
7. sunshine beam condensing unit according to claim 6 is characterized in that: described wedge type optically denser medium body is the right-angle side wedge, and hypotenuse is the light emitting edge, and short right-angle side is the optically focused limit.
8. device of solar generating that has beam condensing unit, have solar cell panel assembly and support, it is characterized in that: described solar cell panel assembly is arranged on the optically focused limit of the sunshine beam condensing unit that wedge type optically denser medium body constituted, the optically focused limit of sunshine beam condensing unit is the minor face of wedge type optically denser medium body, the refractive index of wedge type optically denser medium body is greater than the refractive index of air or vacuum, but the minimum incident angle of the angle on wedge type optically denser medium body two long limits and incident light optically focused is α 1=arcsin{n*sin[arcsin (1/n)-2 α 2] } relation.
9. the device of solar generating that has beam condensing unit according to claim 8 is characterized in that: described wedge type optically denser medium body refractive index is 1.5, and wedge type optically denser medium body is the right-angle side wedge, and hypotenuse is 6: 1 with the length ratio of short right-angle side.
10. the device of solar generating that has beam condensing unit according to claim 9 is characterized in that: be provided with the angular adjustment bar between described solar cell panel assembly and the support.
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|---|---|---|---|
| CNA2008100658010A CN101266316A (en) | 2008-03-07 | 2008-03-07 | Solar light gathering method and device, solar generating device possessing light gathering device |
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| CNA2008100658010A CN101266316A (en) | 2008-03-07 | 2008-03-07 | Solar light gathering method and device, solar generating device possessing light gathering device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053354A (en) * | 2011-01-26 | 2011-05-11 | 陕西科技大学 | Directing-plane lateral-irradiation solar energy condensation body based on total reflection |
| CN102141676A (en) * | 2011-04-12 | 2011-08-03 | 陕西科技大学 | Total reflection-based inverse stair solar condensing body |
| CN112769393A (en) * | 2021-01-22 | 2021-05-07 | 重庆大学 | Vertical total reflection concentrating solar power generation device |
-
2008
- 2008-03-07 CN CNA2008100658010A patent/CN101266316A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053354A (en) * | 2011-01-26 | 2011-05-11 | 陕西科技大学 | Directing-plane lateral-irradiation solar energy condensation body based on total reflection |
| CN102053354B (en) * | 2011-01-26 | 2012-10-10 | 陕西科技大学 | Directing-plane lateral-irradiation solar energy condensation body based on total reflection |
| CN102141676A (en) * | 2011-04-12 | 2011-08-03 | 陕西科技大学 | Total reflection-based inverse stair solar condensing body |
| CN102141676B (en) * | 2011-04-12 | 2013-07-24 | 陕西科技大学 | Total reflection-based inverse stair solar condensing body |
| CN112769393A (en) * | 2021-01-22 | 2021-05-07 | 重庆大学 | Vertical total reflection concentrating solar power generation device |
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Open date: 20080917 |