CN105509339B - A kind of scope of freedom Opticai Concentrating System With Secondary Reflection efficiently changed for solar heat/electricity - Google Patents
A kind of scope of freedom Opticai Concentrating System With Secondary Reflection efficiently changed for solar heat/electricity Download PDFInfo
- Publication number
- CN105509339B CN105509339B CN201511027925.6A CN201511027925A CN105509339B CN 105509339 B CN105509339 B CN 105509339B CN 201511027925 A CN201511027925 A CN 201511027925A CN 105509339 B CN105509339 B CN 105509339B
- Authority
- CN
- China
- Prior art keywords
- secondary mirror
- point
- receiver
- axis
- vector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005611 electricity Effects 0.000 title claims abstract description 18
- 230000005494 condensation Effects 0.000 claims abstract description 44
- 238000009833 condensation Methods 0.000 claims abstract description 44
- 239000013598 vector Substances 0.000 claims description 62
- 230000003287 optical effect Effects 0.000 claims description 13
- 239000011159 matrix material Substances 0.000 claims description 5
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000006467 substitution reaction Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 description 14
- 238000009826 distribution Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000004220 aggregation Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S23/71—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with parabolic reflective surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S2023/87—Reflectors layout
-
- 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
- Y02E10/40—Solar thermal energy, e.g. solar towers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
Abstract
A kind of scope of freedom Opticai Concentrating System With Secondary Reflection efficiently changed for solar heat/electricity, is related to a kind of condenser system efficiently changed for solar heat/electricity.Inlet area the present invention is to solve the heat absorption cavity of current traditional solar energy dish-style lens system is limited, it is impossible to receive the energy of whole hot spots, it can be intercepted, cause the technical problem of the waste of resource.System of the invention is made up of a secondary mirror, secondary mirror and receiver；One secondary mirror, secondary mirror and receiver are axially symmetric structures, and a secondary mirror, secondary mirror and receiver three are coaxial；Receiver is made up of heat dump and Condensation photovoltaic battery plate and flange, and Condensation photovoltaic battery plate is arranged on the outside of flange；The determination mode of the free form surface of secondary mirror is as follows：First, initial and impact point is discrete；2nd, the solution of secondary mirror free form surface discrete point；3rd, secondary mirror curved surface is drawn.The present invention is applied in field of solar energy.
Description
Technical field
The present invention relates to a kind of condenser system efficiently changed for solar heat/electricity.
Background technology
With continuing to develop for precise machine machining, and newborn 3D printing technique arrival so that advanced optics
The design of system becomes more high efficient and flexible, due to the relatively conventional mode of free form surface with design freedom higher and flexibly
Space layout so that the design of optical system is simplified, and makes it have the advantages such as compact conformation, high usage and energy-conservation.
Different with traditional optical system, scope of freedom type light path system does not have certain specific face type equation, it is impossible to public using equation
Formula is defined to it, and free form surface is often to be made up of many spatial points, afterwards by non-uniform rational B-spline (NURBS)
Curve or other manner are attached the final acquisition space face shape of reconstruct.The technology, using little, still has in field of solar energy
It is to be developed.The Gauss energy flow distribution that traditional solar energy dish-style lens system is obtained, is characterized in be flowed closer to center position
Value is higher, in the outer part can the aobvious reduction of lumen.In actual applications, it is to ensure sealing and security, solar energy heat absorbing cavity enters
Open area is limited, can not many times receive the energy of whole hot spots, therefore it can be intercepted, and casts out the aggregation light in outside
Spot energy, causes the waste of resource.
The content of the invention
Inlet area the present invention is to solve the heat absorption cavity of current traditional solar energy dish-style lens system is limited, it is impossible to
The energy of whole hot spots is received, it can be intercepted, cause the technical problem of the waste of resource, and provide a kind of for too
The scope of freedom Opticai Concentrating System With Secondary Reflection of positive energy heat/efficient conversion of electricity.
It is of the invention to use scope of freedom type card for the scope of freedom Opticai Concentrating System With Secondary Reflection that solar heat/electricity is efficiently changed
Plug Green's reflection lens system, is made up of a secondary mirror, secondary mirror and receiver；One secondary mirror, secondary mirror and receiver are axles pair
Claim structure, and a secondary mirror, secondary mirror and receiver three are coaxial；One secondary mirror and secondary mirror are connected by support, a secondary mirror it is recessed
Face is fixed on support towards secondary mirror, receiver, and support is arranged on the axis of a secondary mirror, secondary mirror and receiver three；
Receiver is made up of heat dump and Condensation photovoltaic battery plate and flange, and flange is arranged on the optical window end of heat dump, optically focused
Photovoltaic battery panel is arranged on the outside of flange, and the optical window of heat dump is towards secondary mirror；Heat dump is cylinder, condensation photovoltaic
Cell panel is hollow ring；
One secondary mirror uses traditional solar energy dish-style parabolic mirror, and secondary mirror is a reflection for free form surface form
Minute surface, the determination mode of the free form surface of secondary mirror is as follows：
First, initial and impact point is discrete：
Determine the size of a secondary mirror and receiver, computing formula is as follows：
w(Rmax 2-Rmin 2)/CG=(rmax 2-rmin 2) (1),
W is the occupation ratio of condensation photovoltaic subsystem, CGIt is the geometric concentrating ratio of condensation photovoltaic subsystem, RmaxIt is a secondary mirror
Outer radii, RminIt is the inner radii of a secondary mirror, rmaxIt is the outer radii of Condensation photovoltaic battery plate in receiver, rminIt is
The inner radii of the Condensation photovoltaic battery plate in receiver, Rmin≥rmax, wherein five is known quantity, you can obtain the 6th
Amount, it is determined that the size of a secondary mirror and receiver；
Three-dimensional cartesian coordinate system (x, y, z) is set up, origin O is the intersection point of support and a secondary mirror, and z-axis is by original along support
Point points to the axis in secondary mirror direction, and y-axis is parallel to the radius of Condensation photovoltaic battery plate in receiver and is pointed to by origin poly-
The axis in light photovoltaic battery panel direction, x-axis be by origin O and the axis vertical with plane where z-axis and y-axis, only take z-axis and
Y-axis is calculated for the region of positive number；
N point P is taken on a secondary mirrori,j-1, n is positive integer, and the difference of the y-axis coordinate value of all two neighboring points is equal, i
It is the n sequence number of point, i is positive integer, and No. 1 is that y-axis coordinate value is equal to R on a secondary mirrormaxPoint, No. n be a secondary mirror on y-axis sit
Scale value is equal to RminPoint, sequence number i is stepped up along No. 1 to No. n, yi,j-1It is the coordinate value in y-axis in this n point, calculates public
Formula is as follows：
yi,j-1=y1,j-1-(i-1)×(y1,j-1-yn,j-1)/n (2)；
Point Pi,j-1Z-axis coordinate use formula z=y2/ 4f is calculated, and f is the focal length of a secondary mirror；
Determine the light splitting node P on a secondary mirrork,j-1, calculate its y-axis coordinate value yK, j-1, computing formula is as follows：
If the n point P taken on a secondary mirrori,j-1Not comprising light splitting node Pk,j-1, then in the n point on a secondary mirror
Look for a y-axis coordinate value and yk,j-1Immediate point Pi,j-1As light splitting node Pk,j-1；
M point P is taken on the receiveri,j+1, m is positive integer and m=n, the difference of the y-axis coordinate value of all two neighboring points
Equal, i is the m sequence number of point, and i is positive integer, and No. 1 is that y-axis coordinate value is equal to r on receivermaxPoint, sequence number i is along No. 1
It is stepped up to No. m, yi,j+1It is the coordinate value in y-axis in this m point, yk,j+1It is light splitting node Pk,j-1After being reflected through secondary mirror
Point P on the receiverk,j+1In the coordinate value of y-axis, yk,j+1Equal to rmin, remaining the m-1 y of pointi,j+1Computing formula is as follows：
2nd, the solution of secondary mirror free form surface discrete point：
Setting Pi,jThe point P on a mirror is mapped to for solar irradiationi,j-1Reflex to corresponding point, θ in secondary mirroriIt is Pi,jIt is right
The reflection half-angle answered, θiCalculation it is as follows：
WithDifference representation vectorAnd vectorUnit vector；
It is point Pi,jNormal vector,Obtained by following formula：
Matrix Rot (x, θi) be：
Point P1,jCoordinate be known quantity, its normal vectorAlso can obtain accordingly,
Normal vectorReverse extending line for vectorTwo neighboring normal vectorWithCorresponding reverse extending line
VectorAnd vectorIntersection point be Ci-1, order vectorThat is following formula：
ti-1And tiIt is respectively vectorialAnd vectorArgument, tiThat is point Pi,jTo point CiLength, ti-1That is point Pi-1,jArrive
Point Ci-1Length；
Pi,jIt is expressed from the next：
λiIt is vectorMould；
By in formula (5) (7) (9) substitution (6), drawWith parameter lambdaiMonotropic function, in substituting into formula (8), with ti-1
And tiIt is unknown number, obtains function：
Point Ci-1Coordinate be：
Point C is drawn during formula (10) is substituted into (11)i-1Coordinate, then will point Ci-1Coordinate and formula (9) substitute into formula
(12), you can try to achieve λiValue, by λiValue substitute into formula (9), you can try to achieve Pi,jCoordinate；
3rd, secondary mirror curved surface is drawn：By Pi,jCoordinate using non-homogeneous B spline curve connection reconstruct obtain it is secondary
Mirror free curve, draws secondary mirror free curve, a secondary mirror and receiver, by curve ring with the three-dimensional constructing function of graphics software
Rotated around z-axis, obtained three-dimensional free surface.
Particular location of the receiver of the invention on support can be adjusted voluntarily according to actual needs, regulation receiver
Change in location can cause that the free form surface of secondary mirror is solved again.
Advantages of the present invention：
1st, gross energy utilization rate and high conversion efficiency
The skew ray vector transmission principle that the present invention is used can be best suitable for according to the concrete condition that can flow receiving plane
Energy flow distribution, heat dump will obtain a secondary mirror reflection peak value can flow highest part energy, Condensation photovoltaic battery plate connects
Receive the energy of remainder, and optimization design by means of secondary scope of freedom mirror obtains the energy flow distribution of homogenization, cell panel and heat absorption
The mounting flange of device causes that as far as possible many energy are effectively converted by minimum energy, the system is obtained；
2nd, manufacture processing cost is low
A secondary mirror of the invention so only needs the smaller secondary mirror of fabrication design area accordingly using traditional dish-style collector
, save processing and manufacturing cost；
3rd, security and reliability is strong
Concentration photovoltaic system is often that solar heat/Electricity Federation closes the thinnest in the case of Land use models, especially high power concentrator
Link that is weak, being easiest to damage, this method realizes the homogenization energy flow distribution of concentration photovoltaic system, system greatly improved
Security and reliability；
4th, design freedom is high
Based on skew ray vector transmission method for designing proposed by the present invention, can be such as suitable according to the particular demands of user
The key elements such as any receiving plane position, light splitting ratio, prefocus stream size and uniformity are answered to obtain adaptability structured parameter, it is ensured that
System running state is optimal, and design freedom is high.
This method is the incident ray being based in universal significance, and unconventional mode (must be parallel to optical axis incidence
Ray vectors) solved, the method derives relational expression using basic vector correlation, i.e. mirror reflection law and law vector matrix
Solved, possessed good universality, can adapt to any receiving plane position, light splitting ratio, prefocus stream size and uniform
Many parameter requirements such as property.
Brief description of the drawings
Fig. 1 is the scope of freedom Opticai Concentrating System With Secondary Reflection efficiently changed for solar heat/electricity in specific embodiment two
Schematic diagram, 1 is a secondary mirror, and 2 is secondary mirror, and 4 is heat dump, and 3 is Condensation photovoltaic battery plate；
Fig. 2 is the upward view of receiver in specific embodiment two, and 4 is heat dump, and 3 is Condensation photovoltaic battery plate；
Fig. 3 is the scope of freedom Opticai Concentrating System With Secondary Reflection efficiently changed for solar heat/electricity in specific embodiment two
Optical schematic diagram, 1 is a secondary mirror, and 2 is secondary mirror, and 4 is heat dump, and 3 is Condensation photovoltaic battery plate；
Fig. 4 is the optical schematic diagram of secondary mirror in specific embodiment two, and 2 is secondary mirror；
Fig. 5 is the light transmission path figure of experiment two, and 2 is secondary mirror；
Fig. 6 is the light transmission path figure of experiment three, and 2 is secondary mirror；
Fig. 7 is receiver aggregation energy flow distribution cloud atlas in experiment one, and 3 is Condensation photovoltaic battery plate, and 4 is heat dump, and 6 is to inhale
The center of circle of hot device.
Specific embodiment
Specific embodiment one：Present embodiment is a kind of scope of freedom secondary counter efficiently changed for solar heat/electricity
Condenser system is penetrated, using scope of freedom type Cassegrain's reflection lens system, is made up of a secondary mirror 1, secondary mirror 2 and receiver；One
Secondary mirror 1, secondary mirror 2 and receiver are axially symmetric structures, and a secondary mirror 1, secondary mirror 2 and receiver three are coaxial；One secondary mirror 1
Connected by support 5 with secondary mirror 2, towards secondary mirror 2, receiver is fixed on support 5 for the concave surface of a secondary mirror 1, and support 5 is set
On the axis of a secondary mirror 1, secondary mirror 2 and receiver three；Receiver is by heat dump 4 and Condensation photovoltaic battery plate 3 and method
Orchid composition, flange is arranged on the optical window end of heat dump 4, and Condensation photovoltaic battery plate 3 is arranged on the outside of flange, heat dump 4
Optical window towards secondary mirror 2；Heat dump 4 is cylinder, and Condensation photovoltaic battery plate 3 is hollow ring；
One secondary mirror uses traditional solar energy dish-style parabolic mirror, and secondary mirror is a reflection for free form surface form
Minute surface, the determination mode of the free form surface of secondary mirror is as follows：
First, initial and impact point is discrete：
Determine the size of a secondary mirror and receiver, computing formula is as follows：
w(Rmax 2-Rmin 2)/CG=(rmax 2-rmin 2) (1),
W is the occupation ratio of condensation photovoltaic subsystem, CGIt is the geometric concentrating ratio of condensation photovoltaic subsystem, RmaxIt is a secondary mirror
Outer radii, RminIt is the inner radii of a secondary mirror, rmaxIt is the outer radii of Condensation photovoltaic battery plate in receiver, rminIt is
The inner radii of the Condensation photovoltaic battery plate in receiver, Rmin≥rmax, wherein five is known quantity, you can obtain the 6th
Amount, it is determined that the size of a secondary mirror and receiver；
Three-dimensional cartesian coordinate system (x, y, z) is set up, origin O is the intersection point of support and a secondary mirror, and z-axis is by original along support
Point points to the axis in secondary mirror direction, and y-axis is parallel to the radius of Condensation photovoltaic battery plate in receiver and is pointed to by origin poly-
The axis in light photovoltaic battery panel direction, x-axis be by origin O and the axis vertical with plane where z-axis and y-axis, only take z-axis and
Y-axis is calculated for the region of positive number；
N point P is taken on a secondary mirrori,j-1, n is positive integer, and the difference of the y-axis coordinate value of all two neighboring points is equal, i
It is the n sequence number of point, i is positive integer, and No. 1 is that y-axis coordinate value is equal to R on a secondary mirrormaxPoint, No. n be a secondary mirror on y-axis sit
Scale value is equal to RminPoint, sequence number i is stepped up along No. 1 to No. n, yi,j-1It is the coordinate value in y-axis in this n point, calculates public
Formula is as follows：
yi,j-1=y1,j-1-(i-1)×(y1,j-1-yn,j-1)/n (2)；
Point Pi,j-1Z-axis coordinate use formula z=y2/ 4f is calculated, and f is the focal length of a secondary mirror；
Determine the light splitting node P on a secondary mirrork,j-1, calculate its y-axis coordinate value yK, j-1, computing formula is as follows：
If the n point P taken on a secondary mirrori,j-1Not comprising light splitting node Pk,j-1, then in the n point on a secondary mirror
Look for a y-axis coordinate value and yk,j-1Immediate point Pi,j-1As light splitting node Pk,j-1；
M point P is taken on the receiveri,j+1, m is positive integer and m=n, the difference of the y-axis coordinate value of all two neighboring points
Equal, i is the m sequence number of point, and i is positive integer, and No. 1 is that y-axis coordinate value is equal to r on receivermaxPoint, sequence number i is along No. 1
It is stepped up to No. m, yi,j+1It is the coordinate value in y-axis in this m point, yk,j+1It is light splitting node Pk,j-1After being reflected through secondary mirror
Point P on the receiverk,j+1In the coordinate value of y-axis, yk,j+1Equal to rmin, remaining the m-1 y of pointi,j+1Computing formula is as follows：
2nd, the solution of secondary mirror free form surface discrete point：
Setting Pi,jThe point P on a mirror is mapped to for solar irradiationi,j-1Reflex to corresponding point, θ in secondary mirroriIt is Pi,jIt is right
The reflection half-angle answered, θiCalculation it is as follows：
WithDifference representation vectorAnd vectorUnit vector；
It is point Pi,jNormal vector,Obtained by following formula：
Matrix Rot (x, θi) be：
Point P1,jCoordinate be known quantity, its normal vectorAlso can obtain accordingly,
Normal vectorReverse extending line for vectorTwo neighboring normal vectorWithCorresponding reverse extending line
VectorAnd vectorIntersection point be Ci-1, order vectorThat is following formula：
ti-1And tiIt is respectively vectorialAnd vectorArgument, tiThat is point Pi,jTo point CiLength, ti-1That is point Pi-1,jArrive
Point Ci-1Length；
Pi,jIt is expressed from the next：
λiIt is vectorMould；
By in formula (5) (7) (9) substitution (6), drawWith parameter lambdaiMonotropic function, in substituting into formula (8), with ti-1
And tiIt is unknown number, obtains function：
Point Ci-1Coordinate be：
Point C is drawn during formula (10) is substituted into (11)i-1Coordinate, then will point Ci-1Coordinate and formula (9) substitute into formula
(12), you can try to achieve λiValue, by λiValue substitute into formula (9), you can try to achieve Pi,jCoordinate；
3rd, secondary mirror curved surface is drawn：By Pi,jCoordinate using non-homogeneous B spline curve connection reconstruct obtain it is secondary
Mirror free curve, draws secondary mirror free curve, a secondary mirror and receiver, by curve ring with the three-dimensional constructing function of graphics software
Rotated around z-axis, obtained three-dimensional free surface.
Specific embodiment two：Present embodiment is with the difference of specific embodiment one：Described receiver is installed
With the point of intersection of a secondary mirror 1 on support 5.Other are identical with specific embodiment one.
Specific embodiment three：Present embodiment is with the difference of specific embodiment one or two：Described receiver
On support 5 with a secondary mirror 1 at 1/4 for the length of support 5.Other are identical with specific embodiment one or two.
Specific embodiment four：Present embodiment is with the difference of specific embodiment one to three：：Described receiver
On support 5 with a secondary mirror 1 at 1/3 for the length of support 5.Other are identical with specific embodiment one to three.
Specific embodiment five：Present embodiment is with the difference of specific embodiment one to four：：Described receiver
On branch support 5 with a secondary mirror 1 at 1/2 for the length of support 5.Other are identical with specific embodiment one to four.
Beneficial effects of the present invention are verified by tests below：
Experiment one：This experiment is the scope of freedom Opticai Concentrating System With Secondary Reflection efficiently changed for solar heat/electricity, using certainly
By face type Cassegrain's reflection lens system, it is made up of a secondary mirror 1, secondary mirror 2 and receiver；One secondary mirror 1, secondary mirror 2 and connect
It is axially symmetric structure to receive device, and a secondary mirror 1, secondary mirror 2 and receiver three are coaxial；One secondary mirror 1 and secondary mirror 2 pass through support
5 connections, towards secondary mirror 2, receiver is fixed on support 5 for the concave surface of a secondary mirror 1, and support 5 is arranged on a secondary mirror 1, secondary mirror 2
On the axis of receiver three；Receiver is made up of heat dump 4 and Condensation photovoltaic battery plate 3 and flange, and flange is arranged on
The optical window end of heat dump 4, Condensation photovoltaic battery plate 3 is arranged on the outside of flange, and the optical window of heat dump 4 is towards secondary
Mirror 2；Heat dump 4 is cylinder, and Condensation photovoltaic battery plate 3 is hollow ring；
One secondary mirror uses traditional solar energy dish-style parabolic mirror, and secondary mirror is a reflection for free form surface form
Minute surface, the determination mode of the free form surface of secondary mirror is as follows：
First, initial and impact point is discrete：
Determine the size of a secondary mirror and receiver, computing formula is as follows：
w(Rmax 2-Rmin 2)/CG=(rmax 2-rmin 2) (1),
W is the be dominant ratio, C of condensation photovoltaic subsystemGIt is the geometric concentrating ratio of condensation photovoltaic subsystem, RmaxIt is a secondary mirror
Outer radii, RminIt is the inner radii of a secondary mirror, rmaxIt is the outer radii of Condensation photovoltaic battery plate in receiver, rminIt is
The inner radii of the Condensation photovoltaic battery plate in receiver, Rmin≥rmax, wherein five is known quantity, you can obtain the 6th
Amount, it is determined that the size of a secondary mirror and receiver；
Three-dimensional cartesian coordinate system (x, y, z) is set up, origin O is the intersection point of support and a secondary mirror, and z-axis is by original along support
Point points to the axis in secondary mirror direction, and y-axis is parallel to the radius of Condensation photovoltaic battery plate in receiver and is pointed to by origin poly-
The axis in light photovoltaic battery panel direction, x-axis be by origin O and the axis vertical with plane where z-axis and y-axis, only take z-axis and
Y-axis is calculated for the region of positive number；
100 point P are taken on a secondary mirrori,j-1, n is positive integer, the difference phase of the y-axis coordinate value of all two neighboring points
Be the n sequence number of point Deng, i, i is positive integer, No. 1 be on a secondary mirror y-axis coordinate value equal to RmaxPoint, No. n be a secondary mirror on y
Axial coordinate value is equal to RminPoint, sequence number i is stepped up along No. 1 to No. n, yi,j-1It is the coordinate value in y-axis in this n point, meter
Calculate formula as follows：
yi,j-1=y1,j-1-(i-1)×(y1,j-1-yn,j-1)/n (2)；
Point Pi,j-1Z-axis coordinate use formula z=y2/ 4f is calculated, and f is the focal length of a secondary mirror；
Determine the light splitting node P on a secondary mirrork,j-1, calculate its y-axis coordinate value yK, j-1, computing formula is as follows：
The 100 point P taken on a secondary mirrori,j-1Not comprising light splitting node Pk,j-1, looked in 100 points on a secondary mirror
One y-axis coordinate value and yk,j-1Immediate point P50,j-1As light splitting node Pk,j-1；
100 point P are taken on the receiveri,j+1, the difference of the y-axis coordinate value of all two neighboring points is equal, and i is 100
The sequence number of point, i is positive integer, and No. 1 is that y-axis coordinate value is equal to r on receivermaxPoint, sequence number i along No. 1 to No. 100 progressively
Increase, yi,j+1It is the coordinate value in y-axis in this 100 points, yk,j+1It is light splitting node Pk,j-1In receiver after being reflected through secondary mirror
On point Pk,j+1In the coordinate value of y-axis, yk,j+1Equal to rmin, remaining 99 y of pointi,j+1Computing formula is as follows：
2nd, the solution of secondary mirror free form surface discrete point：
Setting Pi,jThe point P on a mirror is mapped to for solar irradiationi,j-1Reflex to corresponding point, θ in secondary mirroriIt is Pi,jIt is right
The reflection half-angle answered, θiCalculation it is as follows：
WithDifference representation vectorAnd vectorUnit vector；
It is point Pi,jNormal vector,Obtained by following formula：
Matrix Rot (x, θi) be：
Point P1,jCoordinate be known quantity, its normal vectorAlso can obtain accordingly,
Normal vectorReverse extending line for vectorTwo neighboring normal vectorWithCorresponding reverse extending
Line vectorAnd vectorIntersection point be Ci-1, order vectorThat is following formula：
ti-1And tiIt is respectively vectorialAnd vectorArgument, tiThat is point Pi,jTo point CiLength, ti-1That is point Pi-1,jArrive
Point Ci-1Length；
Pi,jIt is expressed from the next：
λiIt is vectorMould；
By in formula (5) (7) (9) substitution (6), drawWith parameter lambdaiMonotropic function, in substituting into formula (8), with ti-1
And tiIt is unknown number, obtains function：
Point Ci-1Coordinate be：
Point C is drawn during formula (10) is substituted into (11)i-1Coordinate, then will point Ci-1Coordinate and formula (9) substitute into formula
(12), you can try to achieve λiValue, by λiValue substitute into formula (9), you can try to achieve Pi,jCoordinate；
Table 1 is the relevant parameter for testing a secondary mirror, secondary mirror and receiver in,
Table 1
The outer radii r of Condensation photovoltaic battery plate is drawn by formula 1maxIt is 0.5m.
The coordinate for finally trying to achieve 100 points in secondary mirror by above-mentioned formula is shown in Table 2：
Table 2
3rd, secondary mirror curved surface is drawn：By Pi,jCoordinate using non-homogeneous B spline curve connection reconstruct obtain it is secondary
Mirror free curve, draws secondary mirror free curve, a secondary mirror and receiver, by curve ring with the three-dimensional constructing function of graphics software
Rotated around z-axis, obtained three-dimensional free surface.
Experiment two：This experiment is 60suns with the geometric concentrating ratio that the difference of experiment one is condensation photovoltaic subsystem, other
Known quantity is all.
Experiment three：This experiment is the secondary mirror 3m of receiver distance one with the difference of experiment two, and other known amount is all.
Fig. 5 is the light transmission path figure of experiment two, and 2 is secondary mirror, and Fig. 6 is the light transmission path figure of experiment three, and 2 are
Secondary mirror, as can be seen from the figure the concave-convex of secondary mirror free form surface depend primarily on the height of receiver, by secondary mirror
After free form surface reflection, aggregation light is divided into two parts, and a part is collected at center and is a little used as high temperature hot-cast socket,
Another part is evenly distributed on receiver surrounding and is changed for condensation photovoltaic, and with the increase of receiver height, secondary mirror is certainly
Switch to fovea superior by face mirror is gradually convex under.Further, since the size of Condensation photovoltaic battery plate is fixed, with the increasing of receiver height
Plus so that light splitting transitional region becomes readily apparent from.
Fig. 7 is receiver aggregation energy flow distribution cloud atlas in experiment one, and 3 is Condensation photovoltaic battery plate, and 4 is heat dump, and 6 is to inhale
The center of circle of hot device, light-colored part is to flow stronger region, and black is to flow weaker region, as can be seen from the figure all of
Ray vectors distribution all coincides with sets target vector, i.e., focusing energy stream in center converges in the origin of heat dump, condensation photovoltaic
Cell panel obtains energy flow distribution then substantially uniformity.Because all heat dump intended recipient vectors all will accurately converge at round dot, make
Its center energy stream peak value is very high.
Because secondary free minute surface has deviation in the law vector of transitional region, even for spot light, on receiving plane
Light splitting transition region can still receive a part of light, but this part loss less, can be ignored.
Claims (5)
1. it is a kind of for the efficient scope of freedom Opticai Concentrating System With Secondary Reflection changed of solar heat/electricity, it is characterised in that for the sun
The scope of freedom Opticai Concentrating System With Secondary Reflection that energy heat/electricity is efficiently changed uses scope of freedom type Cassegrain's reflection lens system, by one
Secondary mirror (1), secondary mirror (2) and receiver composition；One secondary mirror (1), secondary mirror (2) and receiver are axially symmetric structures, and one
Secondary mirror (1), secondary mirror (2) and receiver three are coaxial；One secondary mirror (1) and secondary mirror (2) are connected by support (5), a secondary mirror
(1) towards secondary mirror (2), receiver is fixed on support (5) for concave surface, and support (5) is arranged on a secondary mirror (1), secondary mirror (2)
On the axis of receiver three；Receiver is made up of heat dump (4) and Condensation photovoltaic battery plate (3) and flange, flange peace
Mounted in the optical window end of heat dump (4), Condensation photovoltaic battery plate (3) is installed in the outside of flange, the optical window of heat dump (4)
Mouthful towards secondary mirror (2)；Heat dump (4) is cylinder, and Condensation photovoltaic battery plate (3) is hollow ring；
One secondary mirror uses traditional solar energy dish-style parabolic mirror, and secondary mirror is a speculum for free form surface form
Face, the determination mode of the free form surface of secondary mirror is as follows：
First, initial and impact point is discrete：
Determine the size of a secondary mirror and receiver, computing formula is as follows：
w(Rmax 2-Rmin 2)/CG=(rmax 2-rmin 2) (1),
W is the occupation ratio of condensation photovoltaic subsystem, CGIt is the geometric concentrating ratio of condensation photovoltaic subsystem, RmaxIt is the outer ring of a secondary mirror
Radius, RminIt is the inner radii of a secondary mirror, rmaxIt is the outer radii of Condensation photovoltaic battery plate in receiver, rminIt is receiver
In Condensation photovoltaic battery plate inner radii, Rmin≥rmax, wherein five is known quantity, you can obtain the 6th amount, it is determined that
The size of one secondary mirror and receiver；
Three-dimensional cartesian coordinate system (x, y, z) is set up, origin O is the intersection point of support and a secondary mirror, and z-axis is referred to by origin along support
To the axis in secondary mirror direction, y-axis is parallel to the radius of Condensation photovoltaic battery plate in receiver and points to optically focused light by origin
The axis in volt cell panel direction, x-axis is, by origin O and the axis vertical with plane where z-axis and y-axis, only to take z-axis and y-axis
For the region of positive number calculates；
N point P is taken on a secondary mirrori,j-1, n is positive integer, and the difference of the y-axis coordinate value of all two neighboring points is equal, and i is n
The sequence number of individual point, i is positive integer, and No. 1 is that y-axis coordinate value is equal to R on a secondary mirrormaxPoint, No. n be a secondary mirror on y-axis coordinate value
Equal to RminPoint, sequence number i is stepped up along No. 1 to No. n, yi,j-1It is the coordinate value in y-axis in this n point, computing formula is such as
Under：
yi,j-1=y1,j-1-(i-1)×(y1,j-1-yn,j-1)/n (2)；
Point Pi,j-1Z-axis coordinate use formula z=y2/ 4f is calculated, and f is the focal length of a secondary mirror；
Determine the light splitting node P on a secondary mirrork,j-1, calculate its y-axis coordinate value yK, j-1, computing formula is as follows：
N ＞ k ＞ 1,
If the n point P taken on a secondary mirrori,j-1Not comprising light splitting node Pk,j-1, then one is looked in the n point on a secondary mirror
Y-axis coordinate value and yk,j-1Immediate point Pi,j-1As light splitting node Pk,j-1；
M point P is taken on the receiveri,j+1, m is positive integer and m=n, the difference phase of the y-axis coordinate value of all two neighboring points
Be the m sequence number of point Deng, i, i is positive integer, No. 1 be on receiver y-axis coordinate value equal to rmaxPoint, sequence number i is along No. 1 to m
Number it is stepped up, yi,j+1It is the coordinate value in y-axis in this m point, yk,j+1It is light splitting node Pk,j-1Connect after being reflected through secondary mirror
Receive the point P on devicek,j+1In the coordinate value of y-axis, yk,j+1Equal to rmin, remaining the m-1 y of pointi,j+1Computing formula is as follows：
2nd, the solution of secondary mirror free form surface discrete point：
Setting Pi,jThe point P on a mirror is mapped to for solar irradiationi,j-1Reflex to corresponding point, θ in secondary mirroriIt is Pi,jIt is corresponding
Reflection half-angle, θiCalculation it is as follows：
WithDifference representation vectorAnd vectorUnit vector；
It is point Pi,jNormal vector,Obtained by following formula：
Matrix Rot (x, θi) be：
Point P1,jCoordinate be known quantity, its normal vectorAlso can obtain accordingly,
Normal vectorReverse extending line for vectorTwo neighboring normal vectorWithCorresponding reverse extending line vectorAnd vectorIntersection point be Ci-1, order vector=vectorThat is following formula：
ti-1And tiIt is respectively vectorialAnd vectorArgument, tiThat is point Pi,jTo point CiLength, ti-1That is point Pi-1,jTo point
Ci-1Length；
Pi,jIt is expressed from the next：
λiIt is vectorMould；
By in formula (5) (7) (9) substitution (6), drawWith parameter lambdaiMonotropic function, in substituting into formula (8), with ti-1And ti
It is unknown number, obtains function：
Point Ci-1Coordinate be：
Point C is drawn during formula (10) is substituted into (11)i-1Coordinate, then will point Ci-1Coordinate and formula (9) substitute into formula (12),
λ can be tried to achieveiValue, by λiValue substitute into formula (9), you can try to achieve Pi,jCoordinate；
3rd, secondary mirror curved surface is drawn：By Pi,jCoordinate using non-homogeneous B spline curve connection reconstruct obtain secondary mirror from
By curve, secondary mirror free curve, a secondary mirror and receiver are drawn with the three-dimensional constructing function of graphics software, by curve around z
Axle is rotated, and obtains three-dimensional free surface.
2. according to claim 1 a kind of for the efficient scope of freedom Opticai Concentrating System With Secondary Reflection changed of solar heat/electricity,
It is characterized in that described receiver is arranged on the point of intersection of support (5) and a secondary mirror (1).
3. according to claim 1 a kind of for the efficient scope of freedom Opticai Concentrating System With Secondary Reflection changed of solar heat/electricity,
It is characterized in that it is at the 1/4 of support (5) length that described receiver is arranged on support (5) with a secondary mirror (1) distance.
4. according to claim 1 a kind of for the efficient scope of freedom Opticai Concentrating System With Secondary Reflection changed of solar heat/electricity,
It is characterized in that it is at the 1/3 of support (5) length that described receiver is arranged on support (5) with a secondary mirror (1) distance.
5. according to claim 1 a kind of for the efficient scope of freedom Opticai Concentrating System With Secondary Reflection changed of solar heat/electricity,
It is characterized in that it is at the 1/2 of support (5) length that described receiver is arranged on support (5) with a secondary mirror (1) distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511027925.6A CN105509339B (en) | 2015-12-30 | 2015-12-30 | A kind of scope of freedom Opticai Concentrating System With Secondary Reflection efficiently changed for solar heat/electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511027925.6A CN105509339B (en) | 2015-12-30 | 2015-12-30 | A kind of scope of freedom Opticai Concentrating System With Secondary Reflection efficiently changed for solar heat/electricity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105509339A CN105509339A (en) | 2016-04-20 |
| CN105509339B true CN105509339B (en) | 2017-06-06 |
Family
ID=55717509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511027925.6A Active CN105509339B (en) | 2015-12-30 | 2015-12-30 | A kind of scope of freedom Opticai Concentrating System With Secondary Reflection efficiently changed for solar heat/electricity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105509339B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125772B (en) * | 2016-08-16 | 2019-01-22 | 西安电子科技大学 | The in-orbit real-time tracing sunray adjusting method of symmetric form Opticai Concentrating System With Secondary Reflection |
| CN109945518B (en) * | 2019-03-27 | 2021-05-07 | 西北工业大学太仓长三角研究院 | Solar heat/electricity combined light path gathering method |
| CN110212397B (en) * | 2019-05-28 | 2020-09-08 | 上海卫星工程研究所 | Vortex coiled sunlight pumping optical fiber laser amplifier and amplification method thereof |
| CN110553410A (en) * | 2019-08-13 | 2019-12-10 | 华电电力科学研究院有限公司 | Structure and method for relieving uneven heating of heat absorber of disc type solar power generation system |
| CN112710094B (en) * | 2021-02-01 | 2022-06-03 | 上海晶电新能源有限公司 | Secondary reflection system and solar light-gathering and heat-collecting system with same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1773190B (en) * | 2004-11-12 | 2010-05-05 | 中国科学院电工研究所 | Solar energy thermoelectric co-supply system |
| CN2913955Y (en) * | 2006-06-29 | 2007-06-20 | 中国科学技术大学 | Heat self-dissipating solar energy accumulation type photovoltaic electricity generating system |
| US7612285B2 (en) * | 2007-01-08 | 2009-11-03 | Edtek, Inc. | Conversion of solar energy to electrical and/or heat energy |
| US8680391B2 (en) * | 2009-07-24 | 2014-03-25 | Cewa Technologies, Inc. | Solar concentrator configuration with improved manufacturability and efficiency |
| CN102148589A (en) * | 2010-12-30 | 2011-08-10 | 中国科学院长春光学精密机械与物理研究所 | High-power solar energy concentrated photovoltaic system based on Cassegrain structure |
| CN104898264B (en) * | 2015-06-30 | 2017-08-25 | 日芯光伏科技有限公司 | A kind of rotationally symmetrical non-imaged free-form surface mirror of heavy caliber and its design method |
-
2015
- 2015-12-30 CN CN201511027925.6A patent/CN105509339B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105509339A (en) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105509339B (en) | A kind of scope of freedom Opticai Concentrating System With Secondary Reflection efficiently changed for solar heat/electricity | |
| CN101719738B (en) | High-efficiency solar concentration photovoltaic system | |
| CN102890342B (en) | Method for designing free-form surface optical element for point light source distribution | |
| CN102645686B (en) | Design method of uniformly-converging Fresnel lens | |
| CN102062938A (en) | Light converging device, design method thereof and light-converging photovoltaic power generation device | |
| CN105978478A (en) | Compound parabolic concentrator based on PV/T system and design method | |
| CN202583586U (en) | Parabolic disc type solar focusing system consisting of spherical reflectors | |
| Xu et al. | Effects of deformation of cylindrical compound parabolic concentrator (CPC) on concentration characteristics | |
| CN103441178B (en) | Compact double reflection-type photovoltaic condenser based on compound eye | |
| CN103256724A (en) | Solar light condensed heat collector and method for designing solar light condensed heat collector | |
| CN104898264A (en) | Large-caliber rotationally symmetric non-imaging free-form surface reflector and design method thereof | |
| CN104730602B (en) | A kind of condenser lens | |
| CN103487925A (en) | Design method for mirror plane of combined aspherical reflection-type solar energy collecting mirror | |
| CN102200636A (en) | Design method of non-imaging optical element | |
| CN109945518B (en) | Solar heat/electricity combined light path gathering method | |
| CN104329810B (en) | A kind of uniform condensing device and method for designing thereof | |
| CN105807423A (en) | Modeling method for tracking-free condenser system | |
| CN101388418A (en) | Portable non-track type non-image forming solar condensing device | |
| CN104330885A (en) | Ultra-short focusing condensing photovoltaic condensing lens | |
| CN102842631B (en) | Salar light-gathering electric heating alliance module | |
| CN104297826B (en) | Non-imaging secondary reflector for light condensing system | |
| CN205176308U (en) | Twin spotlight ware | |
| CN204991951U (en) | Antenna and feed -line system of exceedingly high line in moving | |
| CN204334457U (en) | A kind of large tolerance Wireless power transmission light path assembles transmission system | |
| CN102122070B (en) | Design method of reflective optical integrator based on planar mirror array |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |