CN107689769A - Salar light-gathering component and disc type solar energy condenser system - Google Patents
Salar light-gathering component and disc type solar energy condenser system Download PDFInfo
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- CN107689769A CN107689769A CN201710800593.3A CN201710800593A CN107689769A CN 107689769 A CN107689769 A CN 107689769A CN 201710800593 A CN201710800593 A CN 201710800593A CN 107689769 A CN107689769 A CN 107689769A
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- gathering
- rotary paraboloid
- mirror
- photovoltaic generation
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- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000009792 diffusion process Methods 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 230000005693 optoelectronics Effects 0.000 claims abstract description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/20—Optical components
- H02S40/22—Light-reflecting or light-concentrating means
-
- 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
- Y02E10/52—PV systems with concentrators
Abstract
The invention discloses a kind of Salar light-gathering component and disc type solar energy condenser system, the concentrating component includes：For incident sunshine to be reflected and reflected light is converged to the first rotary paraboloid light-gathering mirror of focus；Second rotary paraboloid light-gathering mirror of the focal plane of summit and the first rotary paraboloid light-gathering mirror at a distance of pre-determined distance；The focus of the first rotary paraboloid light-gathering mirror overlaps with the first focus of the second rotary paraboloid light-gathering mirror；So that the light in the focal point focusing of the first rotary paraboloid light-gathering mirror spreads after focus, the light of diffusion forms exiting parallel light through the second rotary paraboloid light-gathering mirror；Receive the exiting parallel light and realize the photovoltaic generation chip of opto-electronic conversion；Photovoltaic generation chip center line and primary optical axis are on the same line.The spottiness of photovoltaic generation chip has been reduced to a great extent in the present invention, improves generating efficiency, while saves settled date tracking cost, improves tracking accuracy.
Description
Technical field
The present invention relates to a kind of solar concentrating system, specially a kind of Salar light-gathering component and disc type solar energy optically focused
System.
Background technology
Existing disc type solar energy condenser system generally includes dish-style condenser, the reception solar energy for converging sunshine
And be converted to the photovoltaic generation chip (also known as solar cell, solar chip or photovoltaic cell) of electric energy, for following the trail of the sun
The settled date tracking system of position and the heat radiation cooling system for ensureing photovoltaic generation chip normal work；And dish-style condenser
Structure is generally the paraboloid of revolution, and conventional photovoltaic generation chip is rectangle, because the projection of many dish-style condensers all uses
Circle, in order to avoid the edge and angle hot spot skewness of rectangular photovoltaic power generation chip, so as to photovoltaic generation chip
Circle need to be cut into, photovoltaic generation chip is positioned near focal plane.Following lack be present in existing disc type solar energy condenser system
Fall into：1. using circular parabolic concentrator, its hot spot flux-density distribution gradient formed is normal distribution, and hot spot is also round
Shape, the photovoltaic generation chip of corresponding rectangle can produce uneven hot spot, if light inlet is changed into rectangle, to the material of light inlet
It is required that it is higher, increase system cost；2. using rectangle parabolic concentrator, although caused hot spot is rectangle, but still exist
Hot spot non-uniform phenomenon, especially become apparent at the edge of rectangular photovoltaic power generation chip and angle, can so cause photovoltaic
Power-generating chip produces spottiness, and generating efficiency is greatly reduced, additionally, due to the raising of photovoltaic generation chip manufacturing process technology,
Chip size is gradually increased, and power improves, and then requires that the optically focused bore of dish-style condenser also increases therewith, so as to also result in
The reduction of the hot spot uniformity；3. using rectangle parabolic concentrator, the lens unit of splicing is more, using number of molds compared with
It is more, increase cost, optical parallax is big.
The content of the invention
The present invention is directed to the proposition of problem above, and develops a kind of Salar light-gathering component and disc type solar energy optically focused system
System.
The technological means of the present invention is as follows：
A kind of Salar light-gathering component, the concentrating component include：
For incident sunshine to be reflected and reflected light is converged to the first rotary paraboloid light-gathering mirror of focus；
Summit and the focal plane of the first rotary paraboloid light-gathering mirror are gathered at a distance of second paraboloid of revolution of pre-determined distance
Light microscopic；The focus of the first rotary paraboloid light-gathering mirror overlaps with the first focus of the second rotary paraboloid light-gathering mirror；And make
The light that the focal point obtained in the first rotary paraboloid light-gathering mirror focuses on spreads after focus, and the light of diffusion is through the second rotation
Parabolic concentrator forms exiting parallel light；
Receive the exiting parallel light and realize the photovoltaic generation chip of opto-electronic conversion；The photovoltaic generation chip is rectangle
Structure, and the center line of the photovoltaic generation chip and primary optical axis are on the same line；
Further, the photovoltaic generation chip is square structure；
Further, parabolic equation corresponding to the second rotary paraboloid light-gathering mirror is y=x^2/4/f2, whenWhen, the pre-determined distance is equal to f2, wherein：f2The first focal length, b for the second rotary paraboloid light-gathering mirror are described
The length of side of photovoltaic generation chip.
A kind of disc type solar energy condenser system, including support frame and settled date tracking system, the condenser system also include：
Salar light-gathering component described in multiple any of the above-described；
Further, multiple first rotary paraboloid light-gathering mirrors are spliced into dish-style condenser；The throwing of the dish-style condenser
Object plane equation is according to the focal length f of the first rotary paraboloid light-gathering mirror1, sunshine be incident to entering for the first rotary paraboloid light-gathering mirror
The length of side for penetrating edge angle and photovoltaic generation chip is drawn.
By adopting the above-described technical solution, Salar light-gathering component provided by the invention and disc type solar energy optically focused system
System, Salar light-gathering component and disc type solar energy condenser system provided by the invention, the projection of shape of dish-style condenser, photovoltaic hair
It is linear ratio relation between the shape of electrical chip and the light spot shape formed on photovoltaic generation chip, hot spot can flow
The Density Distribution uniformity is high, and the spottiness of photovoltaic generation chip has been reduced to a great extent, has improved generating efficiency, drops simultaneously
The low design difficulty of heat radiation cooling system, the shape of photovoltaic generation chip is more regular, reduces the cutting of photovoltaic generation chip
And processing cost, integrate multiple Salar light-gathering components and share same settled date tracking system, save settled date tracking cost, improve with
Track precision.
Brief description of the drawings
Fig. 1, Fig. 2, Fig. 3 are the structural representations of Salar light-gathering component of the present invention；
Fig. 4 is the structural representation of disc type solar energy condenser system of the present invention；
Fig. 5 is the ray tracing figure of Salar light-gathering component of the present invention；
Fig. 6-a are the light spot energy density profiles of Salar light-gathering component of the prior art；
Fig. 6-b are the light spot energy density profiles of Salar light-gathering component of the present invention.
In figure：1st, the first rotary paraboloid light-gathering mirror, the 2, second rotary paraboloid light-gathering mirror, 3, photovoltaic generation chip, 4,
Primary optical axis, 5, support frame.
Embodiment
A kind of Salar light-gathering component as shown in Figure 1, Figure 2 and Figure 3, the concentrating component include：For by it is incident too
Sunlight reflects and reflected light is converged to the first rotary paraboloid light-gathering mirror of focus；Gather with first paraboloid of revolution on summit
Second rotary paraboloid light-gathering mirror of the focal plane of light microscopic at a distance of pre-determined distance；The focus of the first rotary paraboloid light-gathering mirror
Overlapped with the first focus of the second rotary paraboloid light-gathering mirror；In the light that the focal point of the first rotary paraboloid light-gathering mirror focuses on
Spread after focus, the light of diffusion forms exiting parallel light through the second rotary paraboloid light-gathering mirror；Receive it is described it is parallel go out
Penetrate light and realize the photovoltaic generation chip of opto-electronic conversion；The photovoltaic generation chip is rectangular configuration, and the photovoltaic generation core
The center line and primary optical axis of piece are on the same line；Further, the photovoltaic generation chip is square structure；Further,
Parabolic equation corresponding to the second rotary paraboloid light-gathering mirror is y=x2/ 4/f2, whenWhen, described pre-determined distance etc.
In f2, wherein：f2The first focal length, b for the second rotary paraboloid light-gathering mirror are the length of side of the photovoltaic generation chip.
A kind of disc type solar energy condenser system as shown in Figure 4, including support frame and settled date tracking system, the optically focused system
System also includes：Salar light-gathering component described in multiple any of the above-described；Further, multiple first rotary paraboloid light-gathering mirrors
It is spliced into dish-style condenser；The parabola equation of the dish-style condenser is according to the focal length f of the first rotary paraboloid light-gathering mirror1、
Sunshine is incident to the incident edge angle of the first rotary paraboloid light-gathering mirror and the length of side of photovoltaic generation chip is drawn.
Fig. 1 shows the structural representation of Salar light-gathering component of the present invention, wherein：The direction of arrow represents sunshine
Incident direction, a are that sunshine is incident to the incident edge angle of the first rotary paraboloid light-gathering mirror, F is first rotary parabolic
The focus of face condenser, f1For focal length, the f of the first rotary paraboloid light-gathering mirror2For the of the second rotary paraboloid light-gathering mirror
One focal length, b are the length of side of the photovoltaic generation chip, d is that the second rotary paraboloid light-gathering vertex point is thrown with the described first rotation
Pre-determined distance between the focal plane of object plane condenser；Fig. 2 is the front view of the Salar light-gathering component, Fig. 3 be it is described too
The axonometric drawing of positive energy concentrating component；Parabolic equation corresponding to the second rotary paraboloid light-gathering mirror is preferably y=x^2/4/
f2, wherein x is the x-axis coordinate of the point on parabola, and y is the y-axis coordinate of the point on parabola.
Such as Fig. 4, Fig. 5, Fig. 6 a and Fig. 6 b, the present invention is applied to the dish-style concentration photovoltaic system for being projected as square,
For the first rotary paraboloid light-gathering mirror by solar light focusing, the light after focusing passes through second paraboloid of revolution in the case of tracking the sun
Condenser secondary condensation formation directional light is beaten forms uniform light spots, photovoltaic generation on the photovoltaic generation chip of square is similarly
Chip converts light energy into electric energy output；The first rotary paraboloid light-gathering mirror is speculum；Second paraboloid of revolution
Condenser is lens；The light that certain point is sent on lens axis, is referred to as lens after being reflected by lens parallel to optical axis, the point
The first focus.There is maximum interception efficiency when a=45 ° of incident edge angle, in the focal point of the first rotary paraboloid light-gathering mirror
The light of focusing spreads after focus, and the light of diffusion forms exiting parallel light, diffusion through the second rotary paraboloid light-gathering mirror
Angle is equal to a.
Because the power of single photovoltaic generation chip is smaller, generally 2~5kW, by DNI=900W/ ㎡, chip conversion effect
Rate is 40%~50% calculating, then is 10~20 ㎡ for the area of the first rotary paraboloid light-gathering mirror needed for photovoltaic generation chip,
It is individually for photovoltaic generation chip and designs a settled date tracking system causing the increase of cost of electricity-generating, therefore can be by multiple the
One rotary paraboloid light-gathering mirror is added on a support frame, and concentration uses a settled date tracking system.
Illustrate that the parameter of the present invention is calculated and chosen below by example：
By taking 32kW photovoltaic generating system design as an example, it is assumed that single photovoltaic generation chip is that side length b is equal to 12cm
Square, rated generation power be 3.2kW (energy-flux density representative value 64.5W/cm2) single first rotary paraboloid light-gatherings of
The floor projection of mirror is square, then integrates 10 units on a support frame, and the rated generation power of whole system is 32kW,
Other specifications parameters are calculated according to chip power, it is 64.5w/cm to show that required optical cross section is accumulated2* 0.12m*0.12m/900w is
10.32 square metres, the projection of the square for being divided into 4 1.6*1.6 by 10.32 square metres, as disc, according to above parameter
The parabola equation for calculating disc is 6424Z=X^2+Y^2, f1=1606mm, it is known that the size of chip is 120mm*
120mm, b=120mm, a=45 degree, are calculated d=f2=60mm, specific calculating process：Due to a=45, b=120, generate electricity
The energy flow valuve representative value of chip is 64.5w/cm2, rated generation power 3.2kw, the optical cross section product that must can be needed is 64.5w/cm2*
0.12m*0.12m/900w=10.32 square metres；Simultaneously as a=45, and the area of first paraboloid of revolution is 10.32m2,
So the length of side of square is 3212mm, therefore first paraboloidal focal length=3212/2=1606, disc is understood according to equation
Parabola equation be 6424Z=X^2+Y^2, d=b/2=f2=60mm., therefore the parabola side of 2 optically focused parabolic lens
Journey is z=(1/4f2) * (x^2+y^2) so that the bore of lens is more than b.
In summary, Salar light-gathering component and disc type solar energy condenser system provided by the invention, its dish-style condenser
Projection of shape, between the shape of photovoltaic generation chip and the light spot shape that is formed on photovoltaic generation chip be linear
Proportionate relationship, the hot spot flux-density distribution uniformity is high, and the spottiness of photovoltaic generation chip has been reduced to a great extent, and improves
Generating efficiency, while the design difficulty of heat radiation cooling system is reduced, the shape of photovoltaic generation chip is more regular, reduce light
Cutting and the processing cost of power-generating chip are lied prostrate, multiple Salar light-gathering components is integrated and shares same settled date tracking system, it is fixed to save
Day tracking cost, improves tracking accuracy.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (5)
1. a kind of Salar light-gathering component, it is characterised in that the concentrating component includes：
For incident sunshine to be reflected and reflected light is converged to the first rotary paraboloid light-gathering mirror of focus；
Second rotary paraboloid light-gathering mirror of the focal plane of summit and the first rotary paraboloid light-gathering mirror at a distance of pre-determined distance；
The focus of the first rotary paraboloid light-gathering mirror overlaps with the first focus of the second rotary paraboloid light-gathering mirror；And cause the
The light that the focal point of one rotary paraboloid light-gathering mirror focuses on spreads after focus, and the light of diffusion passes through second paraboloid of revolution
Condenser forms exiting parallel light；
Receive the exiting parallel light and realize the photovoltaic generation chip of opto-electronic conversion；Photovoltaic generation chip center line and master
Optical axis is on the same line.
2. Salar light-gathering component according to claim 1, it is characterised in that the photovoltaic generation chip is tied for square
Structure.
3. Salar light-gathering component according to claim 2, it is characterised in that the second rotary paraboloid light-gathering mirror pair
The parabolic equation answered is y=x^2/4/f2, whenWhen, the pre-determined distance is equal to f2, wherein：f2For the described second rotation
First focal length of parabolic concentrator, the length of side that b is the photovoltaic generation chip.
4. a kind of disc type solar energy condenser system, including support frame and settled date tracking system, it is characterised in that the condenser system
Also include：
Salar light-gathering component described in multiple any one of claims 1 to 3.
5. disc type solar energy condenser system according to claim 1, it is characterised in that multiple first rotary paraboloid light-gatherings
Mirror is spliced into dish-style condenser；The parabola equation of the dish-style condenser is according to the focal length of the first rotary paraboloid light-gathering mirror
f1, sunshine is incident to the incident edge angle of the first rotary paraboloid light-gathering mirror and the length of side of photovoltaic generation chip is drawn.
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| CN201710800593.3A CN107689769A (en) | 2017-09-07 | 2017-09-07 | Salar light-gathering component and disc type solar energy condenser system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710800593.3A CN107689769A (en) | 2017-09-07 | 2017-09-07 | Salar light-gathering component and disc type solar energy condenser system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110677117A (en) * | 2019-10-28 | 2020-01-10 | 中国科学院西安光学精密机械研究所 | Solar photovoltaic focusing system |
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| CN1786614A (en) * | 2004-12-10 | 2006-06-14 | 熊定全 | Solar energy heat collector |
| CN101034204A (en) * | 2007-01-26 | 2007-09-12 | 北京理工大学 | Mirror image focus eclipsed direction changeable parallel light energy flux density multiplier and design method thereof |
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Application publication date: 20180213 |